Efficiency of mixed and rigid occlusal stabilization splints: Randomized clinical trial

Abstract Occlusal stabilization splints are the most common treatment for controlling the deleterious effects of sleep bruxism. This study aimed to evaluate the effectiveness of a low-cost, mixed occlusal splint (MOS) compared to that of a rigid splint. A randomized clinical trial was performed on 43 adults of both sexes with possible sleep bruxism and satisfactory dental conditions. They were divided into rigid occlusal splint (ROS) (n = 23) and MOS (n = 20) groups. Masticatory muscle and temporomandibular joint (TMJ) pain intensity (visual analog scale), quality of life (WHOQOL-BREF), indentations in the oral mucosa, anxiety, and depression (HADS), number of days of splint use, and splint wear were evaluated. All variables were evaluated at baseline (T0), 6 months (T6), and 12 months (T12) after splint installation (T0), and splint wear was evaluated at T6 and T12. Student's t-test, Mann-Whitney U test, non-parametric Friedman's analysis of variance for paired samples and pairwise multiple comparisons, Pearson's chi-square test, two-proportion z-test, non-parametric McNemar's and Cochran's Q, and Wilcoxon tests were used (p < 0.05). In both groups, there was a decrease in TMJ pain and pain intensity over time and improvements in the quality of life scores. At T6, there was a higher rate of splint wear in the MOS group than in the ROS group (p = 0.023). The MOS showed a higher rate of wear than the rigid splint but had similar results for the other variables. Therefore, the use of a mixed splint appears to be effective in controlling the signs and symptoms of sleep bruxism.

Associação entre desempenho funcional de crianças com paralisia cerebral e tempo de espera pela provisão de órteses em serviço de reabilitação / Association between functional performance of children with cerebral palsy and waiting time for the splint provision in rehabilitation services

Crianças com paralisia cerebral usualmente necessitam de órtese no polegar para função manual. Objetivo: Analisar a associação entre tempo de espera para recebimento de órtese para polegar, habilidade manual e dificuldade de desempenho em atividades cotidianas de crianças com paralisia cerebral. Método: Estudo de métodos mistos, com uma coorte retrospectiva e avaliação transversal de crianças com paralisia cerebral e indicação de confecção de órtese para polegar. Foram coletadas informações socioeconômicas, mensuração das dificuldades para realizar atividades do cotidiano, função manual pelo Sistema de Classificação da Habilidade Manual (MACS) e tempo de espera pela órtese. Análises descritivas, coeficiente de correlação de Spearman e Teste Kruskal Wallis foram realizadas no software IBM SPSS®. Resultados: 17 crianças e seus pais/responsáveis foram avaliados, sendo a maioria menino (76,5%), com paralisia cerebral do tipo hemiparética (52,9%). O tempo médio de espera pela órtese foi 34,12 dias (DP= 39,01). Crianças com comprometimento motor mais severo (p= 0,038) e pior habilidade manual (p= 0,012) receberam órtese em menor tempo de espera. Não houve diferença estatística entre tempo de espera pela órtese e dificuldade para desempenhar atividades cotidianas. Conclusão: A correlação entre habilidade manual e tempo de espera reforça a importância da avaliação funcional para priorizar concessão de um dispositivo de Tecnologia Assistiva em um serviço público de reabilitação, direcionando o cuidado às necessidades mais específicas das crianças.

Children with cerebral palsy usually need orthoses in their thumbs for manual functions. Objective: Analyzing the association between the waiting time for receiving a thumb orthosis, the manual ability, and the difficulty in performing daily tasks of children with cerebral palsy. Method: Mixed-methods study, with a retrospective cohort and cross-sectional evaluation of children with cerebral palsy and the indication and confection of thumb orthoses. Data collection included socioeconomic information, waiting time for the orthoses, and assessments of the difficulty to carry out daily activities and of manual functioning according to the Manual Ability Classification System (MACS). Descriptive analysis, Spearman's coefficient and the Kruskal-Wallis test were calculated in the IBM software SPSS®. Results: 17 children and their parents/guardians were evaluated. Most were male (76.5%) with hemiplegic cerebral palsy (52.9%). Their mean time waiting for the orthosis was 34.12 days (SD= 39.01). Children with a more severe motor impairment (p= 0.038) or worse manual abilities (p= 0.012) waited to receive the orthosis for a shorter period. There was no statistical difference between the waiting time for the orthosis and the difficulty to perform daily tasks. Conclusion: The correlation between manual ability and the waiting time reiterates the importance of functional evaluations to prioritize the concession of Assistive Technology devices in public rehabilitation services, focusing the care on the more specific needs of each child.

Comparison between Simple Planas Indirect Tracks and occlusal splints for treatment of temporomandibular disorder-related headache: a randomized controlled clinical trial / Comparação entre Pistas Indiretas Planas Simples e placas miorrelaxantes para tratamento de dor de cabeça relacionada à disfunção temporomandibular: ensaio clínico randomizado

ABSTRACT BACKGROUND AND OBJECTIVES: Temporomandibular disorder-related headache (TMDH) is a very common clinical condition which manifests as pain around the temples. The treatment recommended in dentistry is occlusal splint. However, there is a device generally used in functional jaw orthopedics, called simple Planas indirect tracks (SPIT), which has been shown to be efficient in managing these headaches. This clinical trial aimed to compare SPIT and occlusal splints in the treatment of TMDH patients. METHODS: This randomized clinical trial included thirty-seven women who had TMDH for more than one year into three groups: GPIT treated with SPIT, GSPLINT treated with a Michigan splint, and a control group (CG) submitted to no treatment. The randomization was paired, that is, each new individual was assigned to a group sequentially. The number of headache days per month, average pain intensity, pain response to masseter and temporalis palpation, and days of pain drug use were collected and analyzed. The follow-up lasted for 3 months. RESULTS: Thirty-seven patients were included but 4 dropped out during treatment and 33 underwent intervention. Patients in GPIT exhibited superior results compared to GSPLINT and CG, with significant differences between groups for almost all variables. In GPIT, the number of headache days was reduced by 87.43%, pain intensity by 66.67%, and days of drug use by 88.42%, with significant improvement in all parameters compared to CG. In GSPLINT, the number of headache days decreased by 44.46% and days of drug use by 36.63%, while pain intensity increased by 46.67%; however, there was no significant difference in any of the parameters compared to CG. CONCLUSION: SPIT may be a good treatment option for patients with TMDH since these appliances have shown much more consistent results than occlusal splints. Further studies and with more individuals will be needed to confirm these findings.

RESUMO JUSTIFICATIVA E OBJETIVOS: A cefaleia secundária à disfunção temporomandibular (CDTM), é uma condição clínica muito comum, com dores nas têmporas. O tratamento padrão na odontologia são as placas miorrelaxantes, entretanto um aparelho da ortopedia funcional dos maxilares, chamado de Pistas Indiretas Planas Simples (PIPS), tem se demonstrado eficiente no controle dessas cefaleias. Este estudo clínico visou comparar as PIPS com as placas miorrelaxantes, no quadro álgico de CDTM. MÉTODOS: Este ensaio clínico randomizado incluiu 37 mulheres portadoras de CDTM há mais de um ano, que foram distribuídas aleatoriamente em três grupos: o GPIPS, no qual as pacientes foram tratadas com PIPS, o GPLACA, com uso de placas miorrelaxantes de Michigan e o grupo controle (GC), sem qualquer tratamento. A aleatorização foi pareada, sendo que cada participante era consecutivamente alocada em um grupo diferente. Foram coletados e analisados dias de cefaleia por mês, intensidade de dores, resposta álgica à palpação de masseter e temporal, bem como os dias de uso de fármacos. O acompanhamento foi de três meses. RESULTADOS: Das 37 pacientes iniciais, 4 desistiram do tratamento e apenas 33 foram submetidos a alguma intervenção. As pacientes do GPIPS apresentaram resultados muito superiores às do GPLACA e do GC, com diferenças significativas entre os grupos em quase todas as variáveis. No GPIPS, os dias de dor diminuíram 87,43%, a intensidade 66,67% e os dias de uso de fármacos analgésicos 88,42%, sendo estatisticamente significante a melhora em todos os parâmetros em relação ao GC. Já no GPLACA, os dias de dor diminuíram 44,46% e os dias de uso de fármacos 36,63%, mas a intensidade da dor aumentou 46,67%, porém sem diferença estatisticamente significante em nenhum parâmetro quando comparado ao GC. CONCLUSÃO: O uso do PIPS pode ser uma boa escolha de tratamento da CDTM, tendo apresentado resultados mais consistentes do que as placas miorrelaxantes. Mais estudos e com mais participantes são necessários para confirmar estes achados.

Effect of laboratory and chairside polishing methods on the surface topography of occlusal splint materials manufactured using conventional, subtractive and additive digital technologies / Efeito de métodos de polimento em laboratório e em consultório na topografia de superfície de materiais de splint oclusal fabricados usando tecnologias digitais convencionais, subtrativas e aditivas

Objetivo: Este estudo avaliou as propriedades de polimento dos materiais de splint oclusal obtidos usando métodos de fabricação subtrativos e aditivos com os procedimentos de polimento laboratorial (LP) e polimento em consultório (CP). Material e Métodos: As amostras (N=180, n=60 para cada grupo) foram fabricadas usando um dos seguintes métodos: método de fabricação subtrativo (SMM) (M-PM Disc, Merz Dental GmbH), método de fabricação aditivo (AMM) (Freeprint Splint 2.0, DETAX GmbH & Co. KG) e o método de fabricação convencional (CMM) (Promolux HC, Merz Dental GmbH). Seguindo os procedimentos de LP e CP, a rugosidade da superfície dos espécimes foi medida usando um perfilômetro de superfície digital. Um espécime representativo foi selecionado de cada grupo, e uma imagem de microscópio eletrônico de varredura (SEM) foi obtida. Resultados: Tanto o método de fabricação quanto os procedimentos de polimento afetaram significativamente os resultados (P<0,01). Os termos de interação também foram significativos (P<0,001). Conclusão: Com ambos os métodos de polimento, a rugosidade superficial do grupo AMM foi a maior e a do grupo CMM a menor. Embora o procedimento CP tenha sido mais eficaz do que LP com ambos os métodos, a rugosidade da superfície ficou abaixo do limite de 0,2 µm após ambos os procedimentos de polimento testados (AU)

Objective: This study evaluated the polishing properties of the occlusal splint materials obtained using subtractive and additive manufacturing methods with the laboratory-type polishing (LP) and chairside-type polishing (CP) procedures. Material and Methods: Specimens (N=180, n=60 each group) were manufactured using one of the following methods: subtractive manufacturing method (SMM) (M-PM Disc, Merz Dental GmbH), additive manufacturing method (AMM) (Freeprint Splint 2.0, DETAX GmbH & Co. KG), and the conventional manufacturing method (CMM) (Promolux HC, Merz Dental GmbH). Following LP and CP procedures, surface roughness of the specimens was measured using a digital surface profilometer. One representative specimen was selected from each group, and a scanning electron microscope (SEM) image was made. Results: Both the manufacturing method and the polishing procedures significantly affected the results (P<0.01). Interaction terms were also significant (P<0.001). Conclusion: With both polishing methods, surface roughness of the AMM group was the highest and the CMM group the least. Although the CP procedure was more effective than LP with both methods, surface roughness was below the 0.2 µm threshold after both polishing procedures tested. (AU)

Evaluation of the mechanical properties of different materials for manufacturing occlusal splints

Abstract This study aimed to compare the mechanical properties of various occlusal plate materials by analyzing surface roughness, Knoop microhardness, flexural strength, and modulus of elasticity. Fifty samples were prepared and classified as SC (self-curing acrylic resin), WB (heat-cured acrylic resin), ME (acrylic resin polymerized by microwave energy), P (resin print), and M (polymethylmethacrylate polymer block for computer-aided design/computer-aided manufacturing). The data were analyzed using a one-way analysis of variance and Tukey's honestly significant difference test. Surface roughness was the same in all groups. The surface hardness of group M was statistically superior. The samples from groups P and M had higher flexural strength than other samples. The modulus of elasticity of group SC was statistically lower than that of other groups. The mechanical properties of the materials used to make the occlusal plates differed, and group M achieved the best results in all analyses. Therefore, clinicians must consider the material used to manufacture long-lasting and efficient occlusal splints.

Resinas acrílicas utilizadas em placas estabilizadoras: resistência a fraturas e ensaio microbiológico / Acrylic resins used in stabilizer plates: resistance to fractures and microbiological testing

O aprimoramento da tecnologia CAD/CAM permitiu a confecção de placas estabilizadoras digitais, no entanto, há lacunas acerca do comportamento desses dispositivos frente a variáveis mecânicas e biológicas ainda desconhecidas. Dessa forma, o objetivo desse trabalho foi verificar se as resinas utilizadas na tecnologia digital das placas fresadas e impressas são capazes de influenciar na resistência à fratura e na adesão de micro-organismos em detrimento das resinas empregadas na confecção das placas termopolimerizáveis convencionais e se as propriedades testadas se relacionam com a variação da espessura desses dispositivos. Para tanto, foi realizado um estudo in vitro que contou com as fases mecânica e microbiológica, sendo cada uma composta pelos grupos Convencional (GC) (n=30), Fresado (GF) (n=30) e Impresso (GI) (n=30), de acordo com o método de confecção, possuindo cada um três subgrupos (n=10) que variaram a espessura dos espécimes de 1 a 3 mm. Na fase mecânica, as amostras, com formato de barras de 65 mm, foram testadas quanto à resistência à fratura na máquina de ensaios universal, com célula de carga de 500 kgf e velocidade de 1 mm/min; na microbiológica, a forma foi de discos com 15 mm de diâmetro, submetidos à adesão de micro-organismos à superfície com a exposição a Streptococcus mutans e mantidos por 24h a 35 °C em estufa para sucessiva contagem de UFC, com controle positivo. Os testes foram feitos em triplicata e os dados foram armazenados no SPSS 22.0 e a análise estatística contou com a ANOVA e o pósteste de Tukey. Nos resultados da fase mecânica, o ANOVA identificou diferenças estatisticamente significativas entre os grupos (p≤0,005), mostrando que GC e GF apresentaram melhores resultados. O pós-teste de Tukey considerou diferença estatisticamente significativa entre GF e GI (p=0,031), elencando GF como superior. Para a fase microbiológica, não foram verificadas diferenças estatísticas entre os grupos (p>0,005) em nenhuma das análises. Observou-se que para a resistência a fraturas, as resinas do modo fresado descreveram resultados superiores e/ou próximos aos da técnica convencional; e que as resinas da técnica digital e convencional, quanto à adesão superficial de micro-organismos, não diferiram entre si (AU).

CAD/CAM technology allowed the stabilizing splints manufacture, however there are gaps about these devices' behavior in face of mechanical and biological variables that are still unknown. Thus, the objective of this project was to verify if the resins used in digital technology of milled and printed stabilizer splints can influence fracture resistance and microorganism adhesion, in detriment of the resin applied in manufacture of conventional thermopolymerizable splints and if the tested properties are related to thickness variation of these devices. The method included mechanical and microbiological steps, each one composed by Conventional (CG) (n=30), Milled (MG) (n=30) and Printed (PG) (n=30) groups, according to the method of preparation, each one having three subgroups (n=10) that varied the specimen thickness from 1 to 3 mm. In the mechanical step, the samples, in the form of 65 mm bars, were tested for fracture resistance in a universal testing machine, with load cell of 500 kgf and speed of 1 mm/min; in the microbiological step, the shape was in form of 15 mm diameter discs, subjected to microorganism adhesion to the surface with exposure to Streptococcus mutans and kept for 24 hours at 35 °C in oven for successive CFU counting, with positive control. The tests were performed in triplicate and data were stored in SPSS 22.0 and statistical analysis used ANOVA and Tukey's post hoc. In the results of mechanical step ANOVA had identified statistically significant differences between the groups (p≤0,005), showing CG and MG had presented better results. Tukey´s post hoc had considered statistically significant difference between MG and PG (p=0,031), listing MG as superior. For the microbiological step, they did not show statistical differences between the groups (p>0.005) in any analysis. It was observed milled resins described superior results and/or close to the conventional technique one, for fracture resistance; and resins of digital and conventional technique, regarding the microorganism adhesion to the surface, did not differ from each other (AU).

Modificación de la actividad metabólica por medio de un dispositivo intraoral en pacientes con hiperplasia condilar confirmada por SPECT / Metabolic activity modification by means of an intraoral device in patients with condylar hyperplasia confirmed by SPECT

Objetivo: Evaluar los efectos de la aplicación de un dispositivo intraoral de uso permanente en el comportamien- to de los cóndilos con hiperplasia condilar (HC) confirmada por tomografía computarizada de emisión por fotón único (SPECT), estableciendo una comparación con un grupo de pacientes con HC que no utilizó el dispositivo. Materiales y métodos: 30 pacientes con una edad promedio de 21,7 años (+/-5,56) con HC confirmada con SPECT fueron asignados al azar a dos grupos: a los del grupo I (n=18) se les colocó un dispositivo intraoral de uso perma- nente para modificar la posición de la mandíbula, mientras que a los del grupo II (n=12) no se les colocó ningún dispo- sitivo. Se realizaron evaluaciones de dolor, del desvío de la línea media, de la apertura máxima y del disconfort al inicio del estudio y a los 2, 4, 6, 10, 12 y 14 meses. A los 19 meses promedio, la actividad osteoblástica (AO) fue reevaluada me- diante SPECT. Resultados: En el grupo I, la AO en los cortes coro- nales y transversales cesó o disminuyó (p<0,001) respecto a la condición inicial, mientras que en el grupo II la AO au- mentó (p<0,001). Los datos fueron analizados utilizando el test de Wilcoxon de rangos signados. Al ajustar un modelo de ANCOVA robusto utilizando el valor inicial como covariable también se observa que el efecto del grupo fue estadística- mente significativo en ambos cortes (p<0,001). Conclusiones: La aplicación de un dispositivo intrao- ral de uso permanente mejora la evolución de la hiperplasia condilar, lo que lo puede convertir en un tratamiento de uti- lidad para el tiempo que se aguarda para realizar una condi- lectomía alta de cuello de cóndilo, o incluso para evitar este procedimiento (AU)

Objective: To evaluate the effects of the application of an intraoral device for permanent use on the behavior of con- dyles with condylar hyperplasia (CH) confirmed by single photon emission computed tomography (SPECT), establish- ing a comparison with a group of patients with CH that did not use the device. Materials and methods: Thirty patients with an aver- age age of 21.7 years (+/-5.56) with CH confirmed by SPECT were randomly divided into two groups: the ones in group I (n=18) received an intraoral device for permanent use to align the mandible, while those in group II (n=12) did not get any device. Pain, midline shift, maximum opening, and discomfort were evaluated at the beginning of the study and at 2, 4, 6, 10, 12, and 14 months. At an average of 19 months, osteoblastic activity (AO) was reassessed by SPECT. Results: In group I, the AO in the coronal and trans- verse sections ceased or decreased (p<0.001) in comparison to the initial condition, while in group II the AO increased (p<0.001). The data was analyzed by the Wilcoxon signed rank test. Adjusting a robust ANCOVA model using the ini-tial value as a covariate made it possible to observe that the effect of the group was statistically significant in both cuts (p<0.001). Conclusions: The application of an intraoral device for permanent use improves the evolution of condylar hyperpla- sia, which can make it a useful treatment until a high condylectomy of the neck of the condyle is performed, or even to avoid this procedure (AU)

Confección de férulas de descarga personalizadas por CAD-CAM / Customized CAD-CAM fabrication of occlusal splints

La elaboración de férulas de descarga con la utilización de la técnica convencional, basada en la mezcla de un monómero y polímero con el posterior curado de la mezcla, puede dejar restos de monómero que generen reacciones de hipersensibilidad en algunas personas sensibles a estos químicos. Así, el uso de la tecnología CAD-CAM (Diseño Asistido por Ordenador - Fabricación Asistida por Ordenador), puede mejorar el ajuste y confort relacionado con el uso del dispositivo por el paciente. En el siguiente artículo se presenta un método de elaboración de férulas basado en esta tecnología.

The production of occlusal splints using the conventional technique based on a monomer and polymer mixing with subsequent curing of the mixture may leave traces of monomer that generate hypersensitivity reactions in allergic people to these chemicals. Hence, the use of CAD-CAM technology can improve the fit and comfort related to the use of the device on the patient. In this article a splint elaboration method is shown based on this technology.

Efectividad del Bionator de California en la disminución del grado de severidad de los trastornos temporomandibulares / Effectiveness of the California Bionator in reducing the degree of severity of temporomandibular disorders

RESUMEN Fundamento: Existen modalidades de tratamiento para los trastornos temporomandibulares, una de ellas es la Ortopedia funcional de los maxilares. Objetivo: Evaluar la efectividad del Bionator de California en la disminución del grado de severidad de los trastornos temporomandibulares. Metodología: Se realizó estudio experimental, abierto, controlado y aleatorizado en el servicio de Prótesis Estomatológica de la Clínica Estomatológica de Fomento en el período de septiembre de 2019 a septiembre de 2021. Se seleccionaron 60 pacientes con trastornos temporomandibulares que cumplieron los criterios de selección, mediante asignación aleatoria se establecieron los grupos: Estudio (tratado con Bionator de California) y control (tratado con férula neuromiorrelajante). Se utilizaron métodos del nivel teórico, empírico y estadístico. La variable de respuesta principal fue: Efectividad del Bionator de California en el grado de severidad del trastorno temporomandibular. Resultados: Al inicio del estudio predominó la severidad moderada de trastornos temporomandibulares en ambos grupos, pero a los 6 meses de tratamiento predominaron los asintomáticos (66.7 %) en el grupo estudio y 36.7 % en el grupo control, con diferencia estadísticamente significativa entre ambos grupos. Conclusiones: El tratamiento con el Bionator de California fue efectivo porque se logró disminuir el grado de severidad de los trastornos temporomandibulares.

ABSTRACT Background: There are treatment modalities for temporomandibular disorders, one of them is functional orthopedics of the jaws. Objective: To evaluate the effectiveness of the California Bionator in reducing the degree of severity of temporomandibular disorders. Methodology: An experimental, open, controlled and randomized study was carried out in the Dental Prosthesis service at Fomento Dental Clinic from September 2019 to September 2021. 60 patients with temporomandibular disorders who met the selection criteria were selected. The groups were established by random assignment: Study (treated with Bionator from California) and control (treated with a neuromyorelaxant splint). Method theoretical, empirical and statistical levels were used. The main response variable was: Effectiveness of the California Bionator in the degree of severity of the temporomandibular disorder. Results: At the beginning of the study moderate severity of temporomandibular disorders prevailed in both groups, but after 6 months of treatment asymptomatic predominated (66.7%) in the study group and 36.7% in the control group, with a statistically significant difference between both groups. Conclusions: The treatment with the California Bionator was effective because the degree of severity of temporomandibular disorders was reduced.

Dispositivos de Avance Mandibular para el Manejo del Ronquido y la Apnea del Sueño. Actitudes de los Odontólogos Generales y los Especialistas Médicos para Proporcionarlos

RESUMEN: El objetivo de este estudio fue determinar las actitudes y la conciencia de los odontólogos y especialistas médicos sobre la provisión de dispositivos de avance mandibular (DAM) para el tratamiento de los ronquidos y la apnea del sueño. Se llevó a cabo un estudio observacional descriptivo de corte transversal, donde se seleccionaron por conveniencia 53 odontólogos (generales y especialistas) y 5 médicos especialistas en medicina del sueño en la ciudad de Guadalajara, México. Quienes respondieron un cuestionario específico desarrollado por Jauhar et al. (2008) dirigido a conocer la actitud de los odontólogos y médicos especialistas para la provisión de los DAM y otros aspectos relacionados con el ronquido y la apnea obstructiva del sueño (AOS). El 94 % de los odontólogos respondió estar interesado en capacitarse en ronquido y AOS. Y en el grupo de los médicos especialistas se encontró que el 80 % cree que los odontólogos sí tienen un papel para ayudar a los pacientes con ronquido y AOS, el 60 % cree que los odontólogos pueden contribuir con la realización de DAM y el 40 % considera que los odontólogos deben remitir a un especialista del sueño. Existe una actitud muy positiva de los odontólogos para ser parte del grupo interdisciplinario para el tratamiento del ronquido y de la apnea obstructiva del sueño, pero este estudio nos muestra además que a pesar de la disposición para utilizar los DAM, la formación y capacitación no es suficiente. Por otra parte, hay una actitud positiva de los médicos especialistas que consideran que los odontólogos juegan un papel importante en ayudar a los pacientes con ronquidos o con apnea del sueño, pero se evidencia que en su gran mayoría no usan los DAM como parte de un posible tratamiento.

ABSTRACT: The objective of this study was to determine the attitudes and awareness of dentists and medical specialists on the provision of mandibular advancement devices (MAD) for the treatment of snoring and sleep apnea. This is a cross-sectional descriptive observational study, where 53 dentists (general and specialists) and 5 sleep medicine specialists in the city of Guadalajara, Mexico were selected for convenience. The selected group answered a specific questionnaire developed by Jauhar et al., to know the attitude of dentists and medical specialists for the provision of MAD and other aspects related to snoring and obstructive sleep apnea (OSA). 94 % of dentists responded to be interested in training in snoring and OSA. And of the group of medical specialists, 80 % consider that dentists have a role in helping patients with snoring and OSA, 60 % believe that dentists can contribute to MAD and 40 % believe that dentists should refer a sleep specialist. There is a very positive attitude by the dentists to be part of the interdisciplinary group for the treatment of snoring and obstructive sleep apnea, but this study also shows that despite the willingness to use MAD, education and training is not enough. There is a positive attitude of specialist doctors who consider that dentists play an important role in helping patients with snoring or with sleep apnea, but it is evident that the majority do not use MAD as part of a possible treatment.

Effects of different periodontal splints combined with orthodontic treatment on facial aesthetics in patients with sector displacement of periodontitis teeth / 中国医师杂志

Objective:To study the facial aesthetic effect of different periodontal splints combined with orthodontic treatment for patients with sector displacement of periodontitis teeth.Methods:A total of 186 patients with sector displacement of periodontitis teeth admitted to Hunan Second People′s Hospital from April 2018 to April 2020 were prospectively selected as the research objects. 186 patients were divided into observation group and control group by random number table method, with 93 cases in each group. Both groups were treated with orthodontic correction. The observation group was treated with orthodontic combined with super fiberglass periodontal splint, while the control group was treated with orthodontic combined with conventional periodontal splint. The treatment effect, serum inflammatory factors [tumor necrosis factor-α (TNF-α), C-reactive protein (CRP), interleukin-6 (IL-6) ], periodontal pocket depth, bleeding index and plaque index before and after treatment were compared between the two groups, and the satisfaction of the two groups was compared.Results:At half year and 1 year after treatment, the effective rate of the observation group was 91.40%(85/93) and 100%(93/93), which were significantly better than those of the control group [84.95%(79/93), 95.70%(89/93), all P<0.05]. The levels of serum TNF-α, CRP and IL-6 in the two groups at half year and 1 year after treatment were significantly lower than those before treatment (all P<0.05); the levels of serum TNF-α, CRP and IL-6 in the observation group was significantly lower than the control group, with statistically significant difference (all P<0.05). The periodontal pocket depth, bleeding index and plaque index of the two groups after treatment were also significantly lower than those before treatment (all P<0.05); the periodontal pocket depth, bleeding index and plaque index of the observation group was significantly lower than the control group, with statistically significant difference (all P<0.05). At half year and 1 year after treatment, the patients′ satisfaction in the observation group reached 91.40%(85/93) and 94.62%(88/93), respectively, which was also significantly better than that in the control group [81.72%(76/93), 89.25%(83/93), all P<0.05]. Conclusions:Compared with the conventional periodontal splint, the combination of super fiberglass periodontal splint can significantly improve the treatment effect and patient′s satisfaction.

Effects of removable periodontal splint combined with minocycline on periodontal indexes and tooth aesthetics in patients with severe periodontal disease / 中国基层医药

Objective:To investigate the effects of removable periodontal splint combined with minocycline on periodontal indexes and tooth aesthetics in patients with severe periodontal disease.Methods:A total of 102 patients with severe periodontal disease treated in the School and Hospital of Stomatology, China Medical University from November 2018 to April 2020 were included in this study. They were randomly allocated into study and control groups ( n = 51/group). The control group was subject to repair with removable periodontal splint based on routine interventions. The study group was subject to medication with minocycline in addition to the treatments used in the control group. Clinical efficacy, periodontal status (sulcus bleeding index, plaque index, periodontal pocket depth) and gingival crevicular fluid inflammatory factors (transforming growth factor β, monocyte chemoattractant protein-1, interleukin-6, matrix metalloproteinase-8) and bone metabolism indexes [osteocalcin, N-terminal procollagen of type I (PINP), N-terminal propeptide of type I procollagen (PINP), C-terminal telopeptide of type I collagen (CTX) levels], comfort and aesthetics scores, and patient satisfaction were compared between the two groups. Results:Total response rate was significantly higher in the study group than in the control group [94.12% (48/51) vs. 80.39% (41/51), χ2 = 4.32, P < 0.05]. At 1 and 3 months after treatment, sulcus bleeding index (1.32 ± 0.41, 1.11 ± 0.36), plaque index (1.51 ± 0.44, 1.32 ± 0.51), periodontal pocket depth [(3.29 ± 0.70) mm, (2.51 ± 0.63) mm] were significantly lower in the study group than in the control group [1.65 ± 0.39, 1.45 ± 0.38, 1.92 ± 0.42, 1.88 ± 0.49, (5.05 ± 0.79) mm, (3.82 ± 0.86) mm, t = 4.16, 4.63, 4.81, 5.65, 11.90, 8.77, all P < 0.001]. At 1 and 3 months after treatment, the level of transforming growth factor β in the gingival crevicular fluid was significantly higher, and the level of matrix metalloproteinase-8 in the gingival crevicular fluid was significantly lower, in the study group compared with the control group (both P < 0.001). At 1 and 3 months after treatment, the level of osteocalcin in the gingival crevicular fluid was significantly higher, and the level of C-terminal telopeptide of type I collagen in the gingival crevicular fluid was significantly lower, in the study group compared with the control group ( t = -9.97, -10.71, -5.77, -7.40, 7.24, 16.11, all P < 0.001). At 1 and 3 months after treatment, the scores of comfort and aesthetics in the study group were significantly higher than those in the control group ( t = 7.49, 8.26, 7.84, 9.10, all P < 0.001). Patient satisfaction in the study group was significantly higher than that in the control group (94.12% vs. 80.39%, χ2 = 4.32, P < 0.05). Conclusion:Repair with a removable periodontal splint combined with minocycline can increase the therapeutic effects through reducing periodontal inflammation and regulating bone metabolism, thereby improving the periodontal condition, and improving tooth comfort and aesthetics and patient satisfaction in patients with severe periodontal disease.

Are exercises with or without occlusal splints more effective in the reduction of pain in patients with temporomandibular disorders of myogenic origin? A systematic review

Abstract Temporomandibular disorders (TMD) is a term used to describe a set of clinical conditions that may compromise the temporomandibular joint (TMJ) and masticatory muscles and/or associated structures, considered the most frequent cause of orofacial pain of non-dental origin. In recent years, many forms of physical therapy have been used in the treatment of TMD to reduce pain and improve the range of mandibular movement present in this impairment. Among these resources are kinesiotherapy (exercise), electrothermal and manual therapy, acupuncture, training posture, mobilizations, and biofeedback. Objectives To determine if exercises with or without occlusal splints are effective in reducing pain in patients with temporomandibular disorders (TMD) of myogenic origin. Methodology This systematic review was registered in the International Prospective Register of Systematic Reviews (CRD 42019134244). Controlled trials published in PubMed, Scopus, and Cochrane Library following PRISMA guidelines up to April 2022 were randomized and included. The population above 18 years, which evaluated the effectiveness of exercise with or without occlusal splints in reducing pain in patients with TMD of myogenic origin, diagnosed through the Research Diagnostic Criteria for Temporomandibular Disorders, was also included. There was no restriction on the period of publication. Cochrane risk of bias analysis was performed. Results Of the five included articles, all showed a reduction of pain, but without significant differences between the interventions performed. Additionally, studies that evaluated the quality of life and mandibular movements showed a reduction in pain, but no significant differences between therapies. Conclusion The analyzed studies showed no difference in the improvement of pain, quality of life, and mandibular movements between the groups that performed only exercises or the associated treatments.

Management of bruxism associated with temporomandibular disorder: case report / Manejo do Bruxismo associado a Disfunção Temporomandibular: relato de caso

ABSTRACT Studies have found the association between episodes of bruxism and the presence of signs and symptoms of temporomandibular disorder (TMD). The aim of the present study was to report the diagnosis and palliative therapy of bruxism associated with TMD. Patient, 23 years old, male gender, presented at dental clinic, complaining of pain in the temporomandibular joint on the left side and alteration of the form of the anterior teeth. During the anamnesis it was documented that this symptom was recurrent and reported the habit of grinding teeth. The clinical examination observed discrepancy between the centric relation and the maximum habitual intercuspation, unsatisfactory protrusive guide, presence of wear facets, clicking and mandibular deviation during mouth opening. The Research Diagnostic Criteria for Temporomandibular Disorders (RDC / TMD) questionnaire was applied to diagnose TMD. By means of specific algorithms this disorder was classified as myofascial pain, disc displacement with reduction and osteoarthritis, all affecting the left side. Thus, it was proposed the assembly of the models in semi-adjustable articulator for occlusal mapping and waxing diagnosis, then the occlusal adjustment by selective wear and material addition was executed. After this procedure, the occlusal splint was installed as a palliative therapy for bruxism. This case report suggests that the dental approach by means of occlusal adjustment and occlusal splint, in a patient diagnosed with bruxism and temporomandibular disorder, reduces the signs and symptoms that affect the components of the Stomatognathic System.

RESUMO Estudos tem encontrado a associação entre os episódios de bruxismo e a presença dos sinais e sintomas de disfunção temporomandibular (DTM). O objetivo do presente trabalho foi relatar o diagnóstico e terapia paliativa do bruxismo associado à DTM. Paciente, 23 anos, gênero masculino, apresentou-se à clínica odontológica, queixando-se de dor na articulação temporomandibular do lado esquerdo e alteração da forma dos dentes anteriores. Durante a anamnese foi documentado que esse sintoma era recorrente e relatado o hábito de ranger os elementos dentais. No exame clínico observou-se discrepância entre relação cêntrica e máxima intercuspidação habitual, guia protrusiva insatisfatória, presença de facetas de desgaste, estalido e desvio mandibular durante o movimento de abertura bucal. O questionário Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) foi aplicado para diagnosticar a DTM. Por meio de algoritmos específicos essa desordem foi classificada como dor miofascial, deslocamento de disco com redução e osteoartrite, todos acometendo o lado esquerdo. Desta forma, foi proposto a montagem dos modelos em articulador semi-ajustável para mapeamento oclusal e enceramento diagnóstico. Em seguida o ajuste oclusal por desgaste seletivo e acréscimo de material foi executado. Finalizado esse procedimento, a placa estabilizadora da oclusão foi instalada como terapia paliativa para o bruxismo. Esse relato de caso sugere que a abordagem odontológica por meio do ajuste oclusal e placa oclusal, em paciente diagnosticado com bruxismo e disfunção temporomandibular, reduz os sinais e sintomas que afetam os componentes do Aparelho Estomatognático.

Moldeado nasoalveolar prequirúrgico de un paciente con labio y paladar hendido unilateral izquierdo / Presurgical nasoalveolar molding in a patient with left unilateral cleft lip and palate

Resumen Introducción: El labio y paladar hendido son malformaciones craneofaciales que se presentan en 1:1000 nacidos vivos en Colombia. Realizar un moldeado nasoalveolar previo a la cirugía favorece el reposicionamiento de los cartílagos nasales deformados y de los procesos alveolares. Objetivo: Dar a conocer a los profesionales la importancia de realizar moldeado nasoalveolar en un paciente con labio y paladar hendido antes de la intervención quirúrgica. Materiales y métodos: En la clínica odontológica de la Universidad del Sinú de Montería (Córdoba, Colombia), se atendió una paciente de 17 días de nacida que presentaba labio y paladar hendido completo unilateral izquierdo severo. Luego de diligenciar la historia clínica odontológica, se realizó placa de órtesis, que se cambió cada 15 días y se hizo el retoque del "tutor" cada 8 días. Resultados: La placa de órtesis permitió un moldeado naso alveolar, con el progreso en la alimentación y mejoras en el contorneado de los tejidos nasales, que mejoró la preparación para la operación de la hendidura a los 8 meses de edad. Conclusiones: La importancia del moldeado nasoalveolar en casos como el presentado, es propiciar mejores condiciones físicas, favoreciendo la ingesta de alimentos y beneficiando la apariencia física.

Abstract Introduction: Cleft lip and palate is a craniofacial birth defect that accounts for 1:1000 live birhts in Colombia. Performing nasoalveolar molding before surgery facilitates the reshaping of deformed nasal cartilage and alveolar processes. Objective: To make professionals aware of the importance of performing nasoalveolar molding in a patient with cleft lip and palate before surgical intervention. Materials and methods: A 17-day-old infant with a full left unilateral cleft lip and palate was treated at the dental clinic of the University of Sinú, Montería (Córdoba, Colombia). Once the dental clinical history was recorded, an orthosis plate was made. The plate was changed every 15 days and the molding appliance was repositioned every 8 days. Results: The orthosis plate promoted nasoalveolar molding, which facilitated feeding and improved the shape of nasal tissues. Consequently, this early intervention improved the preparation for the surgery of the cleft when the child reached 8 months of age. Conclusions: Nasoalveolar molding in patients with full cleft lip and palate is important to promote better physical conditions, which favor food intake and benefit their physical appearance.

A new biofeedback approach for the control of awake bruxism and chronic migraine headache: utilization of an awake posterior interocclusal device / Uma nova abordagem via biofeedback para o controle do bruxismo de vigília e de enxaqueca crônica: utilização de um dispositivo interoclusal posterior em vigília

ABSTRACT Background: The relationship of bidirectional comorbidity between chronic migraine and pain in the cephalic segment led us to evaluate the improvement in reducing the pain in patients diagnosed with chronic migraine headache and awake bruxism, when undergoing treatment with a partial posterior interocclusal device designed for the management and control of awake bruxism through biofeedback. Methods: Seventy-four patients were evaluated during the following periods: pretreatment, seven, thirty, ninety, one hundred and eighty days, and one year. The evaluation was carried out by measuring the pain in the pretreatment period and pain reduction after awake bruxism treatment, using clinical evaluation and numerical scales for pain. Results: Most of the patients who complained of headache migraine pain, masticatory myofascial pain, temporomandibular joint and neck pain experienced a significant reduction in overall pain, including headaches, between t0 and t30 (p<0.0001). After 30 days of using the device, it was observed that the improvement remained at the same level without any recurrence of pain up to t90. At t180 and t360, it was observed that even with the device withdrawal (at t90) the improvement remained at the same level. Conclusion: The utilization of a posterior interocclusal device designed for the management and control of awake bruxism through biofeedback seems to contribute to the reduction of pain (including migraine headache) in the majority of patients, and, even with the device withdrawal (at t90), the improvement remained at the same level, suggesting the patients succeeded in controlling their awake bruxism and consequently the pains.

RESUMO Introdução: A relação de comorbidade bidirecional entre enxaqueca crônica e dor no segmento cefálico nos levou a avaliar a melhora na redução da dor em pacientes diagnosticados com cefaleia crônica de enxaqueca e bruxismo de vigília, quando submetidos a tratamento com dispositivo interoclusal posterior parcial projetado para o manejo e o controle do bruxismo acordado através de biorretroalimentação (biofeedback). Métodos: Setenta e quatro pacientes foram avaliados durante os seguintes períodos: pré-tratamento, sete, trinta, noventa e cento e oitenta dias, e um ano. A avaliação foi realizada por meio da avaliação da dor no período pré-tratamento e redução da dor após o tratamento do bruxismo de vigília, através de avaliação clínica e escalas numéricas de dor. Resultados: A maioria dos pacientes que se queixou de dor de cabeça com enxaqueca, dor miofascial mastigatória, articulação temporomandibular e dor no pescoço sofreu uma redução significativa na dor geral, incluindo dores de cabeça, entre t0 e t30 (p<0,0001). Após 30 dias de uso do dispositivo, observou-se que a melhora permaneceu no mesmo nível, sem recorrência da dor até t90. Em t180 e t360, observou-se que, mesmo com a retirada do dispositivo (em t90), a melhoria permaneceu no mesmo nível. Conclusão: A utilização de um dispositivo interoclusal posterior projetado para o controle do bruxismo de vigília através de biofeedback parece contribuir para a redução da dor (incluindo enxaqueca) na maioria dos pacientes, e, mesmo com a retirada do dispositivo (t90), a melhora manteve-se no mesmo nível, sugerindo que os pacientes conseguiram controlar o seu bruxismo de vigília e a dor associada a esse hábito.

Parental Reviews On Outcome 0f Night Splints In Children With Spastic Diplegia - A Regional Survey In Kerala, India

Orthotic supports play a very vital role in preventing limb deformities and supporting it in its functions. The aims and objectives of prescribing an orthotic splint for children with cerebral palsy varies widely. Basically there are two types of splints – Supportive & Positional splints. Positional splints aims to improve and maintain muscle lengths and joint positions. These are usually prescribed as night splints. However, how far these splinting meet its expectations are not known. In this survey, we studied the parents’ satisfaction range of 68 cases with spastic cerebral palsy and presented along with our inference.

Method and accuracy of determining the jaw position of repositioning splint with the aid of digital technique / 北京大学学报(医学版)

OBJECTIVE@#To establish the workflow of determining the jaw position of repositioning splint with the aid of digital technique, and to evaluate the accuracy of this workflow and compare the accuracy of raising different vertical dimensions in vitro.@*METHODS@#A volunteer was recruited. The data of full-arch scans, cone beam computed tomography (CBCT) image and ultrasonic jaw motion tracking of the volunteer were acquired. The full-arch scans were merged with the CBCT image, which were then matched to the jaw motion tracking reference system. The jaw position of repositioning splint was determined when the anterior teeth opening was 3 mm and the condyle was in centric relation of the fossa in the sagittal plane. A digital repositioning splint was designed in the software based on virtual articulator and fabricated with additive manufacturing technique. After the splint was tried in, another CBCT image was taken and a qualitative analysis was conducted to compare the position of condyle between these two CBCT images. In the in vitro study, standard dental plaster casts with resin ball markers attached to the base were mounted onto a fully adjustable articulator in the intercuspal position. The dental casts were scanned by an extraoral scanner to establish digital models. The ultrasonic jaw motion tracking device was used to obtain simulated jaw movements on the articulator, which was repeated for three times. The digital models and data of jaw movements were merged in one coordination with the aid of bite forks. The jaw position of repositioning splint was determined by adjusting data of jaw movements, each of which was used to determine three vertical jaw positions 4 mm, 5 mm, and 6 mm with the horizontal jaw position of protrusion 2 mm. The virtual articulators with differently adjusted jaw movements were applied in designing repositioning splints, and the final repositioning splints and virtual jaw relationships were exported in STL format. Then the repositioning splints were fabricated with additive manufacturing technique and tried in plaster casts on the mechanical articulator, which were scanned and the jaw relationships on the mechanical articulator were exported later. The virtual jaw relationships and scanned jaw relationships were registered according to lower models and displacement of upper models was calculated. Ball markers were fit to acquire the coordinates of centers and absolute difference values of centers along three coordinating axes X, Y, and Z were calculated. One-way analysis of variance was conducted using SPSS 18.0 software to compare deviations of the three different vertical jaw relationships in two-side test and the significance level was 0.05.@*RESULTS@#With the aid of multi-source data fusion and individualized jaw motion, the clinical workflow of determining jaw position of repositioning splint was preliminarily established. The designed jaw position was realized on the right and the condyle was more inferior than the designed position on the left. Both displacement of the upper models and absolute difference values of centers showed no significant differences (P>0.05) in different vertical jaw dimensions. The displacement of the upper models was (0.25±0.04) mm. The absolute difference values of centers along the three coordinating axes X, Y, and Z were respectively (0.08±0.01) mm, (0.30±0.02) mm, and (0.21±0.04) mm.@*CONCLUSION@#A novel method of determining the jaw position of repositioning splint with the aid of digital technique is established. It is proved to be feasible by try-in after multi-data fusion, computer-aided design and computer-aided manufacturing. As is shown in vitro, it is accurate to apply this method in adjusting jaw position. Further clinical trial will be designed to evaluate its clinical effect.

Evaluation of pain intensity of the masticatory muscles after occlusal appliance and combined therapy: a 6-months follow-up pilot study

Masticatory muscle pain (MMP) is a common type of orofacial pain.Occlusal appliance (OA) is contemplated as a first-line conservative approach for chronic MMP, however, integrated biopsychosocial approaches such as counseling and self-care therapies (CSG) are also considered essential. Aim: This pilot study aimed to compare the use of a combined therapy (GSG + OA) and solely OA treatment on pain intensity related to chronic MMP over a 6-month follow-up. Methods:For this, 20 patients diagnosed with chronic MMP using the Diagnostic criteria for temporomandibular disorders (DC/TMD) were divided into 2 groups (n=10) and treated with OA or combined therapy (CoT; OA + CSG). Electromyographic muscle activity (EMG), visual analogue scale (VAS) and pressure pain threshold (PPT) were recorded at baseline, 1, 3 and 6 months after treatment. Data was collected and statistical analysis were applied at a significance level of 5%. Results:Results showed no significant differences at baseline among groups for any assessment. VAS showed that both treatments decreased subjective pain in volunteers over time, but no significant differences among both groups were observed at any evaluation time. For electromyography, CoT and OA presented no significant differences throughout the experiment neither on relaxed muscle position or maximum volunteer contraction. Finally, a significantly higher PPT for CoT was found for all muscles at the last assessment point (p<0.05). Conclusion: These findings suggest that both treatments are effective for the reduction of pain perception (VAS) in patients with chronic MMP. However, the addition of CSG to an OA therapy may be more beneficial for the improvement of tenderness on the same patients, at least in a long-term basis (> 3 months). Notwithstanding, a larger study should be performed to substantiate these findings

Materials for lower limb prosthetic and orthotic interfaces and sockets: Evolution and associated skin problems / Materiales en interfaces y encajes ortoprotésicos de miembro inferior: evolución y problemas dermatológicos asociados

Abstract Introduction: Sockets and interfaces are important elements for lower limb orthoses and prostheses, as they allow for proper contact and fit between the devices and the affected limb or stump. Objective: To review the different polymers used in the development of lower limb sockets and external prosthetic and orthotic interfaces, their functional requirements and the possible skin problems caused by their use. Materials and methods: A literature review was conducted using the databases EBSCO, Embase, LILACS, SciELO, ScienceDirect and Scopus. Results: 47 articles and papers that met the inclusion criteria were retrieved. Thermoplastics, thermosets, foams, gels and elastomers are among the polymers used for manufacturing prosthetic and orthotic interfaces and sockets. However, studies estimate that between 32% and 90.9% of the population that use these devices have experienced skin problems on the affected stump or limb, such as excessive sweating, wounds and irritation. Conclusion: There is a clear need for further research to develop prosthetic and orthotic interfaces and sockets for lower limbs that can prevent or control damage to the skin of users.

Resumen Introducción. Los encajes e interfaces representan elementos importantes para las órtesis y prótesis de miembro inferior, ya que permiten el contacto y ajuste adecuado entre los dispositivos y la extremidad afectada o muñón. Objetivo. Documentar la variedad de polímeros empleados en el desarrollo de encajes e interfaces ortoprotésicas externas de miembro inferior, sus requerimientos funcionales y los posibles problemas dermatológicos generados por su uso. Materiales y métodos. Se realizó una revisión de la literatura en las bases de datos EBSCO, Embase, LILACS, SciELO, ScienceDirect y Scopus. Resultados. Se encontraron 47 artículos y documentos que cumplían los criterios de inclusión. Se enuncian polímeros empleados piara la fabricación de interfaces y encajes ortoprotésicos, entre los que se encuentran termoplásticos, termoestables, espumas, geles y elastómeros. Sin embargo, estudios estiman que entre el 32% y el 90.9% de la población que hace uso de estos dispositivos ha presentado problemas en la piel del muñón o la extremidad afectada, como sudoración excesiva, heridas e irritación. Conclusión. Se evidencia la necesidad de realizar actividades investigativas para el desarrollo de interfaces y encajes ortoprotésicos para miembros inferiores que posean la capacidad de evitar o controlar los daños generados en la piel de los usuarios.