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1.
Rev. Odontol. Araçatuba (Online) ; 43(1): 69-74, jan.-abr. 2022. ilus
Article in Portuguese | LILACS, BBO | ID: biblio-1361728

ABSTRACT

Os avanços alcançados no desenvolvimento dos materiais restauradores e procedimentos adesivos têm possibilitado a realização de procedimentos minimamente invasivos nas reabilitações orais. Neste contexto, os laminados cerâmicos tornaram-se uma alternativa viável para a resolução de diversos problemas que acometem a função e estética. Assim, este trabalho apresentou como objetivo relatar um caso clínico de reabilitação estética do sorriso com o fechamento de espaços negros, originados a partir de um trauma, seguido de movimentação ortodôntica, através da utilização de laminados cerâmicos. Neste foram descritas as etapas clínicas de diagnóstico, planejamento e execução do procedimento restaurador, observando que o tratamento proposto foi uma alternativa conservadora e eficaz na resolução dos espaços negros existentes, reestabelecendo a estética do sorriso e devolvendo a auto-estima do paciente(AU)


The advances achieved in the development of restorative materials and adhesive procedures have made possible to perform minimally invasive procedures in oral rehabilitation. In this context, ceramic veneers have become a viable alternative for solving several problems that affect function and aesthetics. Thus, this study aimed to report a clinical case of aesthetic smile rehabilitation with the closure of black spaces, originated from trauma, followed by orthodontic movement, through the use of ceramic veneers. In this, the clinical stages of diagnosis, planning and execution of the restorative procedure were described, noting that the proposed treatment was a conservative and effective alternative in the resolution of existing black spaces, reestablishing the aesthetic of the smile and restoring the patient's selfesteem(AU)


Subject(s)
Humans , Male , Adult , Ceramics , Dental Veneers , Esthetics, Dental , Smiling , Tooth Movement Techniques
2.
Braz. dent. sci ; 25(1): 1-9, 2022. tab, ilus
Article in English | LILACS, BBO | ID: biblio-1354722

ABSTRACT

Objective: Elastomeric chains are commonly used to apply force for orthodontic dental movements. However, force decay and discoloration are two important weak points of these materials. The present study intended to compare the force decay and color stability of different types of elastomeric chains. Material and Methods: This in vitro study evaluated 6 groups of elastomeric chains, including thermoplastic (TP) and thermoset (TS) chains made by the companies American Orthodontics (AO), Ormco (OR), and G&H Orthodontics (GH). The elastomeric chain forces were measured at the baseline, following 1 hour, 1 day, 1, 2, 3, 4, 5, and 6 weeks of stretching. The elongation required for the chains to exert a force of 250 g was calculated. ΔE of each group was calculated by a spectrophotometer following immersion in black tea solution for 6 days. Data were analyzed using the SPSS 22 software and the statistical methods of repeated measures analysis of variance and two-way analysis of variance (P<0.05). Results: The force decay of the TS chains were significantly lower than the TP chains in the 6-week study duration (P<0.05), and the lowest and highest force decay was observed in the products by AO and GH, respectively. The highest force degradation occurred during the first week in all groups. The elongation rate needed for the TS chains was significantly higher than the TP chains (P<0.05), and the highest elongation rate was observed in the products by OR. TS chains showed significantly higher color stability than TP chains, and products by OR and GH had better color stability than the products by AO. Conclusion: The present study showed that TS chains were superior to TP chains in force decay and color stability in all the brands studied. (AU)


Objetivo: Elásticos corrente são comumente utilizados para aplicar forças para a movimentação ortodôntica. Porém, a diminuição de força e descoloração são duas importantes fraquezas desses materiais. O presente estudo tem o objetivo de comparar a diminuição de força e estabilidade de cor de diferentes tipos de elásticos corrente. Material e Métodos: Este estudo in vitro avaliou 6 grupos de elásticos corrente, incluindo termoplástico (TP) e termofixo (TS) produzidos pelas empresas American Orthodontics (AO), Ormco (OR) e G&H Orthodontics (GH). A força dos elásticos corrente foram mensuradas no início, após 1 hora, 1 dia, 1, 2, 3, 4, 5 e 6 semanas de alongamento. A força de alongamento necessária para aplicação de 250g foi calculada. O ΔE de cada grupo foi calculado por um espectrofotômetro após a imersão em solução de chá preto por 6 dias. Os dados foram analizados utilizando o programa SPSS 22 e a análise estatística foi realizada por análise de variância e análise de variância dois fatores (p<0,05). Resultados: A diminuição da força do grupo TS foi significativamente menor que o grupo TP em 6 semanas de estudo (p<0,05), e o menor e maior valor de diminuição de força foi observado nos produtos da empresa AO e GH, respectivamente. A maior degradação de força ocorreu durante a primeira semana em todos os grupos. A taxa de alongamento necessária para o grupo TS foi significativamente maior que o grupo TP (p<0,05), e a maior taxa de alongamento foi observada nos produtos da empresa OR. Os elásticos TS obtiveram resultados significativamente maiores de estabilidade de cor que os elásticos TP, e os produtos da OR e GH tiveram melhor estabilidade de cor que oa produtos AO. Conclusão: O presente estudo demonstrou que os elásticos TS foram superiores aos elásticos TP em diminuição de força e estabilidade de cor em todas as marcas estudadas.(AU)


Subject(s)
Tooth Movement Techniques , Color , Elastomers
3.
Rev. ADM ; 78(4): 215-220, jul.-ago. 2021. ilus
Article in Spanish | LILACS | ID: biblio-1292866

ABSTRACT

En este informe de caso clínico se muestra el tratamiento exitoso de un paciente con anodoncia parcial de órganos dentales 13 y 23 debido a que fueron extraídos por presentar impactación y mal pronóstico de tracción. En este artículo se presenta un paciente masculino de 29 años clase I esquelética con un perfil convexo, maloclusión de clase III, overjet disminuido, ausencia de guías funcionales, discrepancia oseodentaria positiva en arcada superior y negativa en arcada inferior. El tratamiento se realizó con extracciones de los órganos dentales 34 y 44 para nivelar las discrepancias óseo dentarias interarcadas, se llevó a cabo mediante un cierre de espacios recíproco por medio de cadenas elásticas para ambas arcadas, con lo que se logró crear un overjet y overbite adecuados. La creación de las guías caninas funcionales se consiguió mediante el cambio de morfología de los órganos dentales 14 y 24, los cuales fueron llevados a la posición de los caninos ausentes. El tiempo total de tratamiento para este paciente fue de 24 meses. Se realizaron ameloplastias positivas, la aplicación de agregados de resina para mejorar la funcionalidad y proveer salud articular. Se sugiere que ante casos de anodoncia de caninos en la arcada superior, un tratamiento favorable se puede llevar a cabo mediante el cierre de espacios, la caracterización morfológica de los caninos ausentes mediante ameloplastias positivas en premolares (AU)


This case report shows the successful treatment of a patient with partial anodontia of dental organs 13 and 23 because they have been extracted due to present impactation and poor traction prognosis. This article presents a 29-year-old male class I skeletal patient with convex profile, class III malocclusion, overjet reduction, absence of functional guidance, positive bone-teeth discrepancy in the upper arch and negative in the lower arch. The treatment was carried out with the extractions of the dental organs 34 and 44 for correcting oral dental discrepancies between upper and lower arches; it was done using reciprocal closing of spaces by using elastic chains for both arches in order to achieve a suitable overjet and overbite. The creation of the canine guides was achieved by changing the morphology of the dental organs 14 and 24, which were taken to the position of the absent canines. The total treatment timing for this patient was 24 months. Positive ameloplasties were performed by application of resin aggregates to improve functionality and provide joint health. A favorable treatment for these kinds of cases of canine anodontics in the upper arch is carried out by closing spaces and the morphological characterization of the absent canines by positive in-premolar ameloplasties (AU)


Subject(s)
Humans , Male , Adult , Tooth Extraction/methods , Bicuspid , Cuspid/surgery , Dental Enamel/surgery , Anodontia/therapy , Schools, Dental , Tooth Movement Techniques/methods , Orthodontic Brackets , Orthodontic Retainers , Orthodontic Space Closure , Esthetics, Dental , Malocclusion, Angle Class III/therapy , Maxilla , Mexico
4.
Article in Chinese | WPRIM | ID: wpr-879277

ABSTRACT

In the study of oral orthodontics, the dental tissue models play an important role in finite element analysis results. Currently, the commonly used alveolar bone models mainly have two kinds: the uniform and the non-uniform models. The material of the uniform model was defined with the whole alveolar bone, and each mesh element has a uniform mechanical property. While the material of the elements in non-uniform model was differently determined by the Hounsfield unit (HU) value of computed tomography (CT) images where the element was located. To investigate the effects of different alveolar bone models on the biomechanical responses of periodontal ligament (PDL), a clinical patient was chosen as the research object, his mandibular canine, PDL and two kinds of alveolar bone models were constructed, and intrusive force of 1 N and moment of 2 Nmm were exerted on the canine along its root direction, respectively, which were used to analyze the hydrostatic stress and the maximal logarithmic principal strain of PDL under different loads. Research results indicated that the mechanical responses of PDL had been affected by alveolar bone models, no matter the canine translation or rotation. Compared to the uniform model, if the alveolar bone was defined as the non-uniform model, the maximal stress and strain of PDL were decreased by 13.13% and 35.57%, respectively, when the canine translation along its root direction; while the maximal stress and strain of PDL were decreased by 19.55% and 35.64%, respectively, when the canine rotation along its root direction. The uniform alveolar bone model will induce orthodontists to choose a smaller orthodontic force. The non-uniform alveolar bone model can better reflect the differences of bone characteristics in the real alveolar bone, and more conducive to obtain accurate analysis results.


Subject(s)
Biomechanical Phenomena , Computer Simulation , Finite Element Analysis , Humans , Models, Biological , Periodontal Ligament , Stress, Mechanical , Tooth Movement Techniques
5.
Article in English | WPRIM | ID: wpr-922592

ABSTRACT

OBJECTIVES@#At present, the research on clear aligner of molar distalization mainly focuses on the upper jaw, while the research on mandibular molars is few.This study aims to evaluate the therapeutic effect of mandibular molars distalization with clear aligner via cone beam CT (CBCT) and Dolphin software.@*METHODS@#Twenty cases of mandibular molars with clear aligner were included according to the inclusion and exclusion criteria. CBCT was taken before treatment (T0) and when the first molar was moved in place (T1). Dolphin software was used to measure the effectiveness of molar distalization. Three-dimensional changes in direction and the impact on the incisors and facial soft and hard tissues were evaluated.@*RESULTS@#The effective rates of crown and root distalization of the second and first mandibular molars were 74%, 49%, and 71%, 47%, respectively. The second and first molars were both the distal buccal cusp with the largest distalization [(2.15 ± 0.91) mm and (1.85±1.09) mm], respectively, with significant difference between the T0 and T1 (@*CONCLUSIONS@#Clear aligner can effectively move mandibular molars farther, the crown is more effective than the root, and it is tilted. The second mandibular molar is more effective than the first mandibular molar in its distant displacement and three-dimensional changes. Molar distalization causes minor changes in mandibular incisors and facial soft and hard tissues.


Subject(s)
Cephalometry , Maxilla , Molar , Orthodontic Appliances, Removable , Tooth Movement Techniques
6.
Chinese Journal of Stomatology ; (12): 983-988, 2021.
Article in Chinese | WPRIM | ID: wpr-921888

ABSTRACT

The content of the guidelines is based on monographs and literatures on the clear aligner orthodontic treatment in the past five years, and the clinical consensus of all the members of Expert Group for Writing Project of Clear Aligner Technology. This guidelines provide guidance and reference for orthodontists who want carry out clear aligner orthodontic treatment in three parts: overview, diagnosis and design, and common treatment strategies. In the part of the overview, the instructions for the preparation of this guide were described. The requirements for practitioners providing clear aligner orthodontic treatment were put forward, and the risks associated with clear aligner orthodontic treatment were suggested. In the part of diagnosis and design, the indications and selection of clear aligner orthodontic treatment were defined. The requirements of collecting data in orthodontic cases and the design process of clear aligner orthodontic treatment were also explained. The present common treatment strategies for clear aligner orthodontic treatment were summarized in the third part of the guidelines. The elaboration of the treatment methods such as distalization of molar, interproximal enamel reduction and stepwise tooth movement were explained.


Subject(s)
Dental Care , Humans , Molar , Orthodontic Appliances, Removable , Tooth Movement Techniques
7.
Article in English | WPRIM | ID: wpr-878456

ABSTRACT

With a case of mesial impaction of maxillary first and second molar, the mechanical analysis and clinical applications of a self-made helical spring for the uprighting treatment of mesial impacted molars was introduced.


Subject(s)
Humans , Mandible , Maxilla , Molar , Molar, Third , Tooth Movement Techniques , Tooth, Impacted
8.
Article in Chinese | WPRIM | ID: wpr-878423

ABSTRACT

OBJECTIVES@#This study aimed to explore the changes in the expression of the characteristic transcription factor retinoid related orphan receptor γt (RORγt) and the cytokine interleukin-17 (IL-17) of T helper cell 17 (Th17) in the pressure side of the periodontal tissue of rats under different orthodontic forces. Their effects on the expression of osteoprotegerin (OPG) and the quantity of osteoclast (OC) were also explored. The role of Th17 cell in alveolar bone remodeling under different forces was preliminarily investigated.@*METHODS@#A total of 108 rats were chosen and randomly divided into three groups. Mesial forces of 0, 50, and 100 g were loaded on the maxillary first molar in the three groups. The rats were executed at 0, 1, 3, 5, 7, and 14 days. The expression of RORγt mRNA was quantified by real-time quantitative polymerase chain reaction. The expression of IL-17 protein was quantified by enzyme linked immunosorbent assay. The expression levels of RORγt and OPG proteins were quantified, and the quantity of OC was counted via immunohistochemistry.@*RESULTS@#The expression levels of RORγt and IL-17 and the quantity of OC increased first and then decreased in the 50 and 100 g groups, and the peak values of the two groups were on days 5 and 7, respectively. The expression levels in the 50 g group basically recovered to normal level on day 14, while that in the 100 g group remained at a high level. The expression levels in the 50 g group were higher than those in the 0 g group and lower than those in the 100 g group. The expression of OPG in the 50 g group decreased first, then increased, and finally decreased. It basically recovered to normal level on day 14. The expression of OPG in the 100 g group decreased first and then increased. It remained at a high level on day 14. The expression in the 50 g group was significantly higher than that in the 0 g group on day 7, while the expression in the 100 g group was significantly higher than that in the 0 g group on day 14.@*CONCLUSIONS@#RORγt, IL-17, and OPG were expressed regularly over time under different orthodontic forces, indicating that Th17 participated in the process of bone resorption on the pressure side of periodontal tissue by secreting IL-17.


Subject(s)
Animals , Bone Resorption , Cytokines , Interleukin-17 , Molar , Nuclear Receptor Subfamily 1, Group F, Member 3 , Osteoclasts , Osteoprotegerin , Rats , Th17 Cells , Tooth Movement Techniques
9.
Article in English | WPRIM | ID: wpr-888697

ABSTRACT

Nowadays, orthodontic treatment has become increasingly popular. However, the biological mechanisms of orthodontic tooth movement (OTM) have not been fully elucidated. We were aiming to summarize the evidences regarding the mechanisms of OTM. Firstly, we introduced the research models as a basis for further discussion of mechanisms. Secondly, we proposed a new hypothesis regarding the primary roles of periodontal ligament cells (PDLCs) and osteocytes involved in OTM mechanisms and summarized the biomechanical and biological responses of the periodontium in OTM through four steps, basically in OTM temporal sequences, as follows: (1) Extracellular mechanobiology of periodontium: biological, mechanical, and material changes of acellular components in periodontium under orthodontic forces were introduced. (2) Cell strain: the sensing, transduction, and regulation of mechanical stimuli in PDLCs and osteocytes. (3) Cell activation and differentiation: the activation and differentiation mechanisms of osteoblast and osteoclast, the force-induced sterile inflammation, and the communication networks consisting of sensors and effectors. (4) Tissue remodeling: the remodeling of bone and periodontal ligament (PDL) in the compression side and tension side responding to mechanical stimuli and root resorption. Lastly, we talked about the clinical implications of the updated OTM mechanisms, regarding optimal orthodontic force (OOF), acceleration of OTM, and prevention of root resorption.


Subject(s)
Humans , Osteoblasts , Osteoclasts , Periodontal Ligament , Periodontium , Root Resorption , Tooth Movement Techniques
10.
Rev. Soc. Odontol. La Plata ; 31(61): 23-29, 2021. ilus, tab
Article in Spanish | LILACS | ID: biblio-1354026

ABSTRACT

El reporte de este caso tiene como objetivo demostrar la utilidad de los anclajes esqueléticos temporarios como son las miniplacas cigomáticas y los microimplantes "buccal shelf" en el tratamiento ortodóncico, en una paciente de 17 años 10 meses de edad, clase II vertical, dólicofacial, con mordida abierta anterior y aumento de la altura facial inferior. Después de la primera fase de tratamiento, siguiendo la secuencia de arcos para completar la alineación, se utilizaron anclajes esqueléticos extrarradiculares con una mecánica de intrusión con fuerzas elásticas durante 10 meses. Se intruyeron sus piezas posteriores superiores e inferiores y se distalizó la arcada superior, corrigiéndose la oclusión. El mentón retrognático y su perfil convexo mejoraron con la autorrotación de la mandíbula (AU)


The objective of this report case is to demonstrate the usefulness of temporary skeletal anchors such as zygomatic miniplates and buccal shelf microimplants in orthodontic treatment, in a 17-year-old 10-month-old, vertical class II, dollicofacial patient with anterior open bite and increased lower facial height. After the first treatment phase, following the arch sequence to complete the alignment, extra-radicular skeletal anchors were used with intrusion mechanics with elastic forces for 10 months. Its upper and lower posterior pieces were intruded and the upper arch was distalized, correcting the occlusion. e retrognathic chin and its convex profile improved with autorotation of the jaw (AU)


Subject(s)
Humans , Male , Adolescent , Open Bite , Orthodontic Anchorage Procedures , Malocclusion, Angle Class II/therapy , Titanium , Tooth Movement Techniques , Biomechanical Phenomena , Dental Implants , Biotypology
11.
J. appl. oral sci ; 29: e20200791, 2021. tab, graf
Article in English | LILACS | ID: biblio-1250185

ABSTRACT

Abstract Background: IGF-1 may be an important factor in bone remodeling, but its mechanism of action on osteoclasts during orthodontic tooth movement is complex and unclear. Methodology: The closed-coil spring was placed between the left maxillary first molar and upper incisors with a force of 50 g to establish an orthodontic movement model. Eighty SD rats were randomized to receive phosphate buffer saline or 400 ng rhIGF-1 in the lateral buccal mucosa of the left maxillary first molar every two days. Tissue sections were stained for tartrate-resistant acidic phosphatase (TRAP), the number of TRAP-positive cells was estimated and tooth movement measured. Results: The rhIGF-1 group exhibited evidential bone resorption and lacuna appeared on the alveolar bone compared to the control group. Moreover, the number of osteoclasts in compression side of the periodontal ligament in the rhIGF-1 group peaked at day 4 (11.37±0.95 compared to 5.28±0.47 in the control group) after the orthodontic force was applied and was significantly higher than that of the control group (p<0.01). Furthermore, the distance of tooth movement in the rhIGF-1 group was significantly larger than that of the control group from day 4 to day 14 (p<0.01), suggesting that rhIGF-1 accelerated orthodontic tooth movement. Conclusion: Our study has showed that rhIGF-1 could stimulate the formation of osteoclasts in the periodontal ligament, and accelerate bone remodeling and orthodontic tooth movement.


Subject(s)
Humans , Animals , Rats , Osteoclasts , Tooth Movement Techniques , Periodontal Ligament , Insulin-Like Growth Factor I , Bone Remodeling , Rats, Sprague-Dawley
12.
J. appl. oral sci ; 29: e20200734, 2021. tab, graf
Article in English | LILACS | ID: biblio-1180800

ABSTRACT

Abstract Objective To compare tooth movement rate and histological responses with three different force magnitude designs under osteoperforation in rabbit models. Methodology 48 rabbits were divided into three groups: Group A, Group B, and Group C, with traction force of 50 g, 100 g, 150 g, respectively. Osteoperforation was performed at the mesial of the right mandibular first premolar, the left side was not affected. One mini-screw was inserted into bones between two central incisors. Coil springs were fixed to the first premolars and the mini-screw. Tooth movement distance was calculated, and immunohistochemical staining of PCNA, OCN, VEGF, and TGF-β1 was analyzed. Results The tooth movement distance on the surgical side was larger than the control side in all groups (P<0.01). No significant intergroup difference was observed for the surgical side in tooth movement distance among the three groups (P>0.05). For the control side, tooth movement distance in Group A was significantly smaller than Groups B and C (P<0.001); no significant difference in tooth movement distance between Group B and Group C was observed (P>0.05). On the tension area of the moving premolar, labeling of PCNA, OCN, VEGF and TGF-β1 were confirmed in alveolar bone and periodontal ligament in all groups. PCNA, OCN, VEGF and TGF-β1 on the surgical side was larger than the control side in all groups (P<0.001). Conclusion Osteoperforation could accelerate orthodontic tooth movement rate in rabbits. Fast osteoperforation-assisted tooth movement in rabbits was achieve with light 50 g traction.


Subject(s)
Animals , Periodontal Ligament , Tooth Movement Techniques , Rabbits , Bicuspid
13.
Dental press j. orthod. (Impr.) ; 26(2): e2119378, 2021. tab, graf
Article in English | LILACS, BBO | ID: biblio-1249704

ABSTRACT

ABSTRACT Objective: To determine whether separating the alignment and leveling phases can reduce proclination of the mandibular incisors. Methods: Eligibility criteria included Class I subjects with an irregularity index of 3-5 mm, 3-4 mm curve-of-Spee (COS), and non-extraction treatment. Thirty adults were randomly allocated into two groups: (1) Control group was leveled and aligned simultaneously with flat archwires progressively to 0.016x0.022-in stainless-steel; (2) Experimental group was aligned first with 0.014-in-superelastic NiTi with mild accentuated COS, then leveled using 0.016x0.022-in beta-titanium accentuated COS archwires and gradually reduced the curve until flat. Mandibular incisor position and inclination were evaluated by cephalometric analysis. COS and irregularity index were evaluated in study models. Assessment was conducted twice after 0.016-in NiTi and after 0.016x0.022-in stainless-steel archwire placements. Dental changes from cephalograms and models were compared within group using paired t-test and between groups using independent t-test. Results: Control group: Round-wire-phase, mandibular incisors tipped labially (4.38° and 1 mm) with intrusion (-1.13 mm); Rectangular-wire-phase, mandibular incisors further intruded and proclined (-0.63 mm and 1.38°). Experimental group: During aligning with round accentuated COS archwires, mandibular incisors tipped very slightly labially (0.75° and 0.50 mm) with no significant intrusion; during leveling with rectangular archwires, incisors majorly intruded (1.75 mm) with slight proclination (1.81°). The experimental group had significant less incisor proclination (control: 5.76°, experimental: 2.56°) with more incisor intrusion (control: -1.75 mm, experimental: -2.13 mm). The COS in experimental group showed significant greater reduction (-2.88 mm) than that of the control group (-1.69 mm). Conclusion: In control group, mandibular incisor proclination was markedly observed in round archwires, with further proclination caused by rectangular archwires. In experimental group, minimal proclination was exhibited when accentuated COS round archwires were used for aligning. Leveling with rectangular archwires caused less proclination with more COS reduction.


RESUMO Objetivo: Avaliar se separar os estágios de alinhamento e nivelamento reduz a projeção dos incisivos inferiores. Métodos: Os critérios de inclusão foram indivíduos Classe I com índice de irregularidade de 3-5mm, Curva de Spee (CS) de 3-4mm e tratamento sem extrações. Trinta adultos foram alocados aleatoriamente em dois grupos: o Grupo Controle (1) foi simultaneamente alinhado e nivelado com arcos planos progressivamente até atingir o 0,016" x 0,022" de aço inoxidável; o Grupo Experimental (2) foi inicialmente alinhado com arcos superelásticos NiTi 0,014" com CS levemente aumentada, em seguida nivelado com arcos de beta-titânio 0,016" x 0,022" com CS acentuada, que foi gradualmente reduzida até ficar plana. A posição e inclinação dos incisivos inferiores foram avaliadas por meio de análise cefalométrica. A CS e o índice de irregularidade foram avaliados por meio de modelos de estudo. A avaliação foi realizada duas vezes, sendo após a inserção dos arcos NiTi 0,016" e dos arcos 0,016" x 0,022" de aço. As mudanças dentárias visualizadas nos cefalogramas e nos modelos foram comparadas dentro dos grupos utilizando teste t pareado e entre os grupos utilizando o teste t independente. Resultados: Grupo Controle: estágio de arco redondo: os incisivos inferiores se inclinaram vestibularmente (4.38° e 1 mm) e intruíram (-1,13mm); estágio de arco retangular: os incisivos inferiores intruíram e se projetaram adicionalmente (-0.63mm e 1,38°). Grupo Experimental: Durante o alinhamento com arcos redondos e CS acentuada, os incisivos inferiores se inclinaram levemente para vestibular (0,75° e 0,50mm), sem intrusão significativa; durante o nivelamento com arcos retangulares, os incisivos, em sua maioria, intruíram (1,75mm), com uma leve projeção (1,81°). O grupo experimental apresentou projeção dos incisivos significativamente menor (controle: 5,76°; experimental: 2,56°), com maior intrusão dos incisivos (controle: -1,75mm; experimental: -2,13mm). A CS no Grupo Experimental apresentou redução significativamente maior (-2,88 mm) do que no grupo controle (-1,69 mm). Conclusão: No Grupo Controle, foi observada de forma notória a projeção dos incisivos inferiores nos arcos redondos, com projeção adicional causada pelos arcos retangulares. No Grupo Experimental, foi observada uma projeção mínima quando foram utilizados arcos redondos com CS acentuada para alinhamento. O nivelamento com arcos retangulares causou menos projeção com maior redução da CS.


Subject(s)
Orthodontic Wires , Stainless Steel , Tooth Movement Techniques , Cephalometry , Incisor , Mandible
14.
Dental press j. orthod. (Impr.) ; 26(1): e21bbo1, 2021. tab, graf
Article in English | LILACS, BBO | ID: biblio-1154064

ABSTRACT

ABSTRACT Introduction: Orthodontic treatment in patients with traumatized teeth is a condition that needs good planning in order to achieve satisfactory results. Objective: To discuss approaches to orthodontic treatment of malocclusions associated with trauma followed by avulsion of anterior teeth, reimplanted after a short period of time. Case report: The treatment started with the distalization of upper posterior teeth, with the aid of mini-implants and sliding jigs, followed by the inclusion of anterior teeth in the arch, followed by intrusion of these teeth. Results: With the treatment, improved mobility of the anterior teeth was achieved, with better insertion into bone tissue. The most important factor for satisfactory treatment and a good prognosis for avulsion is the time the tooth remains outside the socket. Orthodontic treatment in patients with traumatized teeth is not contraindicated; however, clinical and radiographic aspects must be considered. Conclusion: Among the feasible orthodontic treatment options, the conservative approach can be a very favorable treatment alternative.


RESUMO Introdução: O tratamento ortodôntico em pacientes com dentes traumatizados é uma condição que necessita de um bom planejamento, a fim de se conseguir resultados satisfatórios. Objetivo: Discutir as abordagens de tratamento ortodôntico de más oclusões associadas ao trauma seguido de avulsão de dentes anteriores, reimplantados após curto espaço de tempo. Relato do Caso: O tratamento realizado iniciou-se com a distalização dos dentes posteriores superiores, com auxílio de mini-implantes e sliding jigs, seguida da inclusão dos dentes anteriores na arcada e intrusão desses dentes. Resultados: Com a realização do tratamento, conseguiu-se melhoria na mobilidade dos dentes anteriores, com inserção mais favorável no tecido ósseo. O fator mais importante para o tratamento satisfatório e um bom prognóstico da avulsão é o tempo em que o dente permanece fora do alvéolo. O tratamento ortodôntico em pacientes com dentes traumatizados não é contraindicado; porém, aspectos clínicos e radiográficos devem ser considerados. Conclusão: Entre as opções de tratamento ortodôntico factíveis, a abordagem conservadora pode ser uma opção de tratamento bastante favorável.


Subject(s)
Humans , Adult , Tooth Avulsion , Conservative Treatment , Malocclusion , Tooth Avulsion/complications , Tooth Avulsion/therapy , Tooth Avulsion/diagnostic imaging , Tooth Movement Techniques , Follow-Up Studies , Incisor/diagnostic imaging
15.
Braz. dent. sci ; 24(1): 1-9, 2021. tab, ilus
Article in English | LILACS, BBO | ID: biblio-1145518

ABSTRACT

Objective: To determine the force decay and discoloration in Generation I and Generation II elastomeric chain on artificial saliva immersion. Material and methods: Generation I and Generation II elastomeric chains stretched on an acrylic board and immersed in artificial saliva for 1, 7, 14, 21, and 28 days according to the group of days. On each specified day, the force of each sample measured by an orthodontic force gauge and the magnitude of the force obtained is entered to the formula to find out the force decay in percentage, whereas discoloration of each sample analyzed by the color reader with CIE Lab analysis. Results: The force decay between Generation I and Generation II elastomeric chains showed a statistically significant difference in every group of days, in which Generation II is more effective in maintaining stretch force. Similar to force decay, the discoloration in Generation I elastomeric chains on the 14th day showed significant value and Generation II elastomeric chains were more stable in maintaining color compared to Generation I. Conclusions: over the entire research period time, Generation II elastomeric chains are more stable in maintaining stretch forces and color compared to Generation I elastomeric chains. (AU)


Objetivo: Determinar a queda de força e descoloração nos elásticos ortodônticos tipo corrente de Geração I e Geração II na imersão em saliva artificial. Material e métodos: Elásticos Geração I e Geração II foram esticados em placas de acrílico e imersas em saliva artificial por 1, 7, 14, 21 e 28 dias, de acordo com o grupo de dias. Em cada dia especificado, a força de cada amostra medida por um medidor de força ortodôntica e a magnitude da força obtida são inseridos na fórmula para descobrir sua queda em porcentagem, enquanto a descoloração de cada amostra foi analisada pelo leitor de cores "CIE Lab". Resultados: A queda da força entre os elásticos Geração I e Geração II apresentou diferença estatisticamente significativa em todos os grupos de dias, sendo que a de Geração II foi mais efetiva na manutenção da força de alongamento. Semelhante à queda de força, a descoloração nos elásticos da Geração I mostrou um valor significativo no 14º dia, e elásticos da Geração II foram mais estáveis na manutenção da cor em comparação com a Geração I. Conclusões: durante todo o período de pesquisa, os elásticos tipo corrente da Geração II foram mais estáveis na manutenção das forças de alongamento e da cor em comparação com os elásticos da Geração I (AU)


Subject(s)
Saliva, Artificial , Tooth Movement Techniques , Bite Force
16.
Rev. Fac. Odontol. (B.Aires) ; 36(82): 15-20, 2021. ilus, tab
Article in Spanish | LILACS | ID: biblio-1290838

ABSTRACT

El tratamiento ortodóncico permite rehabilitar la función como también la estética facial y de la sonrisa. En muchos casos, esto puede realizarse sin la utilización de brackets. Las placas alineadoras realizan movimientos en las arcadas dentarias y las posibilidades y los resultados obtenidos cada vez son mejores. La utilización del sistema de alineación con placas permite que muchos pacientes, que no están dispuestos a utilizar brackets, encuentren una respuesta a sus problemas de oclusión (AU)


Subject(s)
Humans , Female , Adult , Orthodontic Appliances, Removable , Orthodontic Brackets , Orthodontic Appliance Design , Imaging, Three-Dimensional , Esthetics, Dental , Tooth Movement Techniques/methods , Image Interpretation, Computer-Assisted/methods , Advance Care Planning
17.
Braz. dent. sci ; 24(2): 1-9, 2021. ilus, tab
Article in English | LILACS, BBO | ID: biblio-1177505

ABSTRACT

Objective: To evaluate the effect of salbutamol, montelukast, and prednisone on orthodontic tooth movement in rats. Material and Methods: In vivo experimental preclinical study. The sample consisted of 48 rats randomly distributed in four study groups. Group A was given saline solution; to group B, salbutamol 4 mg/Kg; to group C, montelukast 2.5 mg/Kg and to group D, prednisone 2.5 mg/Kg. All were fitted with orthodontic devices and the medications were administered intraperitoneally every 12 hours for 5 days. The clinical evaluation (variation in the interincisal distance) was performed at one, three, five, and seven days and the histopathological analysis (cell count) at five and seven days. Results: In the clinical evaluation of the variation in the interincisal distance, a significant difference was found in all the evaluations (p <0.05). It was found that the salbutamol group presented higher variation values in the interincisal distance on all the days evaluated. In the histopathological analysis at five and seven days, it was found that the osteoblast and osteocyte count was significantly higher in the salbutamol group compared to the other groups (p <0.05). However, in the subgroup analysis, it was found that there was no significant difference in the osteoblast and osteocyte count between the prednisone, montelukast, and control group (p> 0.05). Conclusion: The administration of salbutamol increased the magnitude of orthodontic tooth movement; nonetheless, the administration of montelukast and prednisone did not modify the magnitude of orthodontic tooth movement in rats. (AU)


Objetivo: Avaliar o efeito do salbutamol, montelucaste e prednisona no movimento dentário ortodôntico em ratos. Material e métodos: Estudo pré-clínico experimental in vivo. A amostra foi composta por 48 ratos distribuídos aleatoriamente em quatro grupos de estudo. O grupo A recebeu solução salina; para o grupo B, salbutamol 4 mg/kg; ao grupo C, montelucaste 2,5 mg/kg e ao grupo D, prednisona 2,5 mg/kg. Todos foram equipados com dispositivos ortodônticos e os medicamentos foram administrados por via intraperitoneal a cada 12 horas por 5 dias. A avaliação clínica (variação da distância interincisal) foi realizada em um, três, cinco e sete dias e a análise histopatológica (contagem de células) em cinco e sete dias. Resultados: Na avaliação clínica da variação da distância interincisal, houve diferença significativa em todas as avaliações (p <0,05). Verificou-se que o grupo salbutamol apresentou maiores valores de variação na distância interincisal em todos os dias avaliados. Na análise histopatológica aos cinco e sete dias, verificou-se que a contagem de osteoblastos e osteócitos foi significativamente maior no grupo salbutamol em comparação aos demais grupos (p<0,05). No entanto, na análise de subgrupos, verificou-se que não houve diferença significativa na contagem de osteoblastos e osteócitos entre os grupos prednisona, montelucaste e controle (p>0,05). Conclusão: A administração de salbutamol aumentou a magnitude do movimento dentário ortodôntico; no entanto, a administração de montelucaste e prednisona não modificou a magnitude do movimento dos dentes ortodônticos em ratos. (AU)


Subject(s)
Animals , Rats , Osteoblasts , Osteocytes , Tooth Movement Techniques , Prednisone , Albuterol
18.
Rev. Asoc. Odontol. Argent ; 108(3): 143-152, dic. 2020. ilus
Article in Spanish | LILACS | ID: biblio-1147970

ABSTRACT

Las fuerzas ejercidas durante el tratamiento ortodóncico son consideradas un tipo particular de traumatismo dental. El movimiento ortodóncico de una pieza dentaria puede producir inflamación o necrosis pulpar y reabsorción radicular. Estos efectos colaterales indeseables son difíciles de tratar, especialmente cuando las fuerzas aplicadas son excesivas y no controladas. Diferentes estudios han evaluado el impacto de las fuerzas excesivas durante el movimiento dentario. Sin embargo, los resultados son confusos y contradictorios. La predisposición genética y la variabilidad biológica individual de los pacientes son factores importantes que deben ser tenidos en cuenta. Por eso es necesario contar con una historia clínica completa, utilizar imágenes 3D y realizar diferentes pruebas clínicoradiográficas con el fin de obtener información precisa acerca del diagnóstico, la indicación de tratamiento y el posible pronóstico a distancia. El objetivo de este artículo es realizar una revisión de la patología pulpar y la reabsorción radicular en relación con el tratamiento ortodóncico (AU)


Orthodontic forces are recognised as a particular type of dental trauma. During orthodontic tooth movement, the occurrence of pulp inflammation or necrosis and subsequent root resorption are undesirable side effects that are difficult to treat, especially when uncontrolled excessive forces are applied. Several studies have evaluated the impact of excessive forces during teeth movement. However their results are confused and contradictory. Genetic disposition and individual biological variability are important factors that must be always considered. Therefore, a complete clinical history, the use of 3D images along with different clinical and radiographic diagnostic methods are necessary to provide accurate diagnosis and prognosis of the treatment. The objective of this article is to review the possibility of pulp pathology and root resorption related to orthodontic treatment (AU)


Subject(s)
Root Resorption , Tooth Movement Techniques , Dental Pulp Diseases , Prognosis , Tooth Injuries , Dental Pulp Necrosis
19.
Int. j. med. surg. sci. (Print) ; 7(4): 1-11, dic. 2020. ilus, tab
Article in Spanish | LILACS | ID: biblio-1151711

ABSTRACT

Según la literatura científica, ¿El láser de baja potencia propicia la aceleración de los movimientos dentarios durante el tratamiento ortodóntico? El objetivo de este trabajo buscasistematizar sobre la capacidad del láser de baja potencia en la aceleración de los movimientos dentarios durante el tratamiento ortodóncico. Para ello, se realizó una revisión sistemática, una búsqueda empleando buscadores booleanos en la plataforma de PubMed. Las palabras clave empleadas para fueron: orthodontic movement, orthodontic tooth movement, orthodontic, orthodontic treatment, low level laser therapy, low level laser,laser therapy y la combinación entre ellos. Las investigaciones incluidas trataron el tema de la aceleración del movimiento dentario durante el tratamiento de ortodoncia empleando láser de baja potencia. Se incluyeron en este estudio publicaciones de revistas indexadas en PubMed, ensayos clínicos, en idioma inglés y que correspondieran a artículos publicados desde el año 2000 a la fecha. A si también,se realizó evaluación del riesgo de sesgo. Las variables analizadas fueron: autor principal, título, año, tipo de artículo, revista, país de investigación y si los artículos demuestran que el láser de baja potencia aumenta el movimiento dentario durante el tratamiento ortodóncico. Los resultados arrojaron que el 60% de los estudios incluidos concluyen que el láser de baja potencia acelera el movimiento dentario durante el tratamiento de ortodoncia; el 30% de estos no encontraron cambios significativos con relación a los grupos estudiados con los de control y un 10% resultó en conclusiones dudosas. Por lo tanto, a pesar de que los resultados son alentadores por la tendencia en que el láser de baja potencia si acelera los movimientos ortodónticos, sería necesaria la presencia de un número superior de estudios clínicos aleatorizados para un esclarecimiento específico de las bondades que aporta esta terapia al sector.


According to scientific literature, does low-power laser promote acceleration of tooth movements during orthodontic treatment? The objective for this work seeksto systematize the ability of the low-power laser to accelerate tooth movements during orthodontic treatment.For this,a systematic review was carried out, a search using Boolean search engines on the PubMed platform. The keywords used for were: orthodontic movement, orthodontic tooth movement, orthodontic, orthodontic treatment, low level laser therapy, low level laser, laser therapy and the combination between them. The included investigations dealt with the issue of acceleration of tooth movement during orthodontic treatment using low-power laser, were from journals indexed in PubMed, clinical trials, in English, and corresponded to articles published since 2000 to date. Assessment of risk of bias was performed. The variables analyzed were: main author, title, year, type of article, journal, country of research, and whether the articles show that low-power laser increases tooth movement during orthodontic treatment.The results showed that 60% of the included studies conclude that the low-power laser accelerates tooth movement during orthodontic treatment, 30% of these did not find significant changes in relation to the groups studied with those of control and 10% resulted in dubious conclusions. Thus, although the results are encouraging due to the trend in which the low-power laser does accelerate orthodontic movements, the presence of a higher number of randomized clinical studies would be necessary for a specific clarification of the benefits that this therapy brings to the patient. sector.


Subject(s)
Orthodontics , Tooth Movement Techniques , Low-Level Light Therapy
20.
Rev. Ateneo Argent. Odontol ; 63(2): 39-54, nov. 2020. ilus
Article in Spanish | LILACS | ID: biblio-1150748

ABSTRACT

La búsqueda por encontrar métodos para acortar la duración de los tratamientos de ortodoncia tiene un pasado reciente, un presente y un futuro. Las fuerzas ortodóncicas que se ejercen sobre la membrana periodontal producen movimientos dentarios por modificaciones histológicas y biomoleculares. El conocimiento de los procesos biológicos da lugar a implementar cambios para favorecer la aceleración de los procesos resortivos y neoformativos. El objetivo de esta publicación es hacer una breve síntesis de lo acontecido con este tema y exponer el procedimiento de las micro-osteoperforaciones (MOPs) como una opción complementaria al tratamiento de ortodoncia convencional. Aún no existe suficiente apoyo de ensayos clínicos en humanos para aseverar su éxito. Más aún, distintos autores publican conclusiones contradictorias. Es de esperar que, en breve, nuevas investigaciones contribuyan a respaldarlo o desestimarlo (AU)


The quest to find methods to shorten the duration of orthodontic treatments has a recent past, a present, and a future. Orthodontic forces exerted on the periodontal membrane produce tooth movements by histological and biomolecular modifications. Knowledge of biological processes results in changes to promote the acceleration of spring and neoformative processes. The objective of this publication is to make a brief synthesis of what happened with this topic and expose the micro-osteoperforations (MOPs) procedure as a complementary option to conventional orthodontic treatment. There is not yet enough support from human clinical trials to assert its success. Moreover, different authors publish conflicting conclusions. It is to be expected that, shortly, further investigations will help to support or dismiss it (AU)


Subject(s)
Humans , Tooth Movement Techniques/methods , Biological Phenomena , Oral Surgical Procedures , Microsurgery , Osteotomy/methods , Bone Resorption/physiopathology , Low-Level Light Therapy , RANK Ligand , Duration of Therapy
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