Cambios en parámetros masticatorios con prótesis parcial removible para dientes posteriores perdidos / Changes in masticatory parameters with removable partial dentures for missing posterior teeth

Introducción: el reemplazo de dientes perdidos aspira a mejorar la función masticatoria. Aunque hay diferentes opciones para ello, la conveniencia de la prótesis parcial removible (PPR) es su bajo costo. Objetivo: comparar el desempeño masticatorio (DM) después de 20 ciclos masticatorios y al umbral de la deglución (UD) en adultos de 50 a 70 años con dientes posteriores perdidos (DPP), con/sin PPR; y los ciclos hasta la deglución. Material y métodos: estudio transversal en 35 adultos con dientes anteriores y PPR bien ajustadas y utilizadas para comer. El lado de prueba fue el lado con más DPP. El DM se evaluó después de 20 ciclos y al UD utilizando un alimento prueba artificial (Optosil Comfort®) con/sin la PPR en orden aleatorizado. Las partículas se tamizaron para determinar el tamaño medio de partícula (TMP) como medida del DM. Los ciclos se contaron visualmente. Estadística descriptiva y comparaciones con SPSS-v23. Resultados: hubo diferencias significativas (p ≤ 0.05) al masticar con/sin PPR. El TMP fue más pequeño (mejor DM) con la PPR después de 20 ciclos y al UD (3.9 vs 4.4 mm y 3.2 vs 4.2 mm). Los ciclos para llegar al UD disminuyeron con la PPR (40 vs 47). Conclusión: a pesar de una mejora limitada de la función masticatoria, las PPR ayudan a preparar los alimentos en partículas más pequeñas antes de deglutirlas. La mejoría en DM con PPR es de 24% al UD, realizando menos ciclos antes de deglutir sus alimentos (AU)

Introduction: replacement of missing teeth should improve masticatory function. Although there are different options removable partial dentures (RPD) are used due to their lower cost. Objective: to compare masticatory performance (MP) after 20 chewing-cycles and swallowing-threshold (ST) in 50-70 year-old adults with missing posterior teeth (MPT) with and without their cast-metal RPD; chewing cycles until swallowing were also compared. Material and methods: 35 adults participated in this cross-sectional study. Subjects with anterior teeth and welladjusted RPDs, used for eating were included. The side with more MPT was selected as the test side. MP was evaluated after 20 cycles and ST using an artificial test-food (Optosil Comfort®) with/without the RPD (subject-own-control) (randomized order). Chewed particles were sieved to determine medium-particle-size (MPS) as a measure of MP. Chewing cycles were visually counted. Descriptive statistics and comparisons were run with SPSS v23. Results: there were significant differences (p ≤ 0.05) for all parameters when chewing with/without the RPD. MPS was smaller (better MP) with the RPD (3.9 vs 4.4 mm and 3.2 vs 4.2 mm) after 20 cycles and ST respectively. Cycles required to reach ST were less when chewing with the denture (40 vs 47). Conclusion: despite a limited improvement of masticatory function RPDs help patients prepare their food into smaller particles before swallowing. Improvement in MP with RPDs for patients with MPT is 24% at ST and they perform fewer chewing cycles before swallowing food (AU)

X-linked hypohidrotic ectodermal dysplasia management with removable prosthesis in a pediatric patient: case report / Manejo de displasia ectodérmica hipohidrótica ligada al cromosoma X con prótesis removible en un paciente pediátrico: reporte de caso

Introduction: Ectodermal dysplasia is a rare genetic disorder that affects structures derived from ectoderm such as teeth, hair, nails, and sweat glands. Oligodontia is a common finding that affects the chewing, smiling and self- esteem of these pediatric patients. Case Report: We present a case report of a 7-years-old pediatric patient who consulted with his mother, showing the same condition. The intervention consisted of a removable prosthesis with satisfactory results. Conclusion: The X-linked hypohidrotic ectodermal dysplasia represents a challenge for a pediatric dentist who offers rehabilitation to the patient according to craniofacial development, age, socioeconomic status, and the number of missing teeth.

Introducción: La oligodoncia es un hallazgo común que afecta la masticación, la sonrisa y la autoestima de estos pacientes pediátricos. Case Report: Presentamos un reporte de caso de un paciente pediátrico de 7 años que consultó con su madre presentando la misma condición. La intervención consistió en una prótesis de remoción con resultados satisfactorios. Conclusión: La displasia ectodérmica hipohidrótica ligada al cromosoma X representa un desafío para un odontopediatra que ofrece rehabilitación al paciente de acuerdo con el desarrollo craneofacial, la edad, el nivel socioeconómico y el número de dientes faltantes.

Reabilitação oral utilizando prótese parcial removível associada a implantes osseointegrados: relato de caso / Oral rehabilitation using removable partial prosthesis associated with osseointegrated implants: case report

Introdução: As próteses parciais removíveis são alternativas amplamente utilizadas na reabilitação oral de pacientes parcialmente desdentados. Na atualidade os implantes dentais têm sido indicados para tratamento de pacientes edêntulos em associação com próteses parciais removíveis convencionais. Objetivo: Relatar um caso clínico utilizando uma prótese parcial removível convencional associada a implantes osseointegrados em paciente portador de Classe I de Kennedy. Relato de Caso: Paciente N.A.A.S., sexo feminino, 65 anos, procurou atendimento clínico no Instituto de Estudos da Saúde (IES) para reabilitação protética das arcadas dentais superior e inferior. A sua queixa principal era "dificuldade de mastigação". A paciente apresentava prótese total removível insatisfatória na maxila e não utilizava nenhum tipo de prótese dentária na mandíbula, que se apresentava parcialmente edêntula. O tratamento realizado foi a confecção de uma prótese total na arcada superior. Na arcada inferior foram inseridos dois implantes de hexágono externo nas regiões correspondentes às áreas dos dentes 34 e 44, após quatro meses a prótese parcial removível convencional foi confeccionada e incorporada aos implantes osseointegrados utilizando o sistema de retenção do tipo attachments Equator. Conclusão: Os resultados revelaram que a técnica de associação da prótese parcial removível convencional aos implantes osseointegrados demonstrou ser uma opção viável de tratamento com capacidade de devolver a função, a estética e manter a integridade dos dentes e tecidos periodontais(AU)

Introduction: Removable partial dentures are alternatives widely used in the oral rehabilitation of partially edentulous patients. Currently, dental implants have been indicated for the treatment of edentulous patients in association with conventional removable partial dentures. Objective: To report a clinical case using a conventional removable partial denture associated with osseointegrated implants in a patient with Kennedy Class I. Case Report: Patient N.A.A.S., female, 65 years old, sought clinical care at the Institute of Health Studies (HEI) for prosthetic rehabilitation of the upper and lower dental arches. His main complaint was "chewing difficulty". The patient had unsatisfactory removable total prosthesis in the maxilla and did not use any type of dental prosthesis in the mandible, which was partially edentulous. The treatment performed was the manufacture of a total prosthesis in the upper arch. In the lower arch, two external hexagon implants were inserted in the regions corresponding to the tooth areas 34 and 44, after four months the conventional removable partial denture was made and incorporated into the osseointegrated implants using the equator attachments retention system. Conclusion: The results revealed that the technique of associating conventional removable partial dentures with osseointegrated implants proved to be a viable treatment option with the ability to restore function, aesthetics and maintain the integrity of teeth and periodontal tissues(AU)

Consensos referidos a conceptos rehabilitadores en la enseñanza de la odontología. Parte I: conceptos generales y diseño de la prótesis parcial removible / Consensus referring rehabilitative concepts in the teaching of dentistry. Part I: general concepts and design of removable partial prosthesis

En este artículo se desarrolla el consenso alcanzado entre profesores, referido a los conceptos generales, componentes y la secuencia del diseño de la prótesis parcial removible, durante la formación del odontó-logo en el ámbito de la Facultad de Odontología de la Universidad de Buenos Aires (AU)

This article develops the consensus between professors on the general concepts, components, and the sequence of the design of the partial removable prosthesis during the training of the dentist in the field of the Faculty of Dentistry of the University of Buenos Aires (AU)

Surgical and nonsurgical treatment of papillary hyperplasia: A case report / Tratamiento quirúrgico y no quirúrgico de la hiperplasia papilar inflamatoria: Reporte de Caso

Dentures with dental plaque predispose recurrent hyperplasia on the palatal mucosa. Surgical procedures for the treatment of inflammatory papillary hyperplasia involve postsurgical discomfort and morbidity. This repot describes clinical and histologic aspects of a patient with severe akantolitic inflammatory papillary hyperplasia. The palatal mucosa was treated with a surgical bur with a low-speed handpiece. A new removable denture was performed and adapted. A follow-up of 4 years showed staility of health at palatal mucosa. Patient referred low discomfort and morbidity when using bur technique. Control of removable denture was critical for long-term healing and soft tissue stability.

Las prótesis dentales con placa bacteriana predisponen a la hiperplasia recurrente en la mucosa palatina. Los procedimientos quirúrgicos para el tratamiento de la hiperplasia papilar inflamatoria implican molestias y morbilidad posquirúrgicas. Este reporte describe los aspectos clínicos e histológicos de un paciente con hiperplasia papilar inflamatoria acantolítica severa. La mucosa palatina fue tratada con una fresa quirúrgica con una pieza de mano de baja velocidad. Se realizó y adaptó una nueva prótesis parcial removible. Después de un seguimiento de 4 años, se encontró estabilidad de la salud de la mucosa palatina. El paciente se refirió a la baja incomodidad y morbilidad al usar la técnica de la fresa. El control de la prótesis parcial removible fue crítico para la cicatrización a largo plazo y la estabilidad de los tejidos blandos, evitando la recidiva de la hiperplasia papilar inflamatoria.

Considerações sobre os tipos de próteses parciais removíveis e seu impacto na qualidade de vida / Considerations on types of removable partial dentures and their impact on oral health

O objetivo deste estudo foi discutir, por meio de uma revisão de literatura, as indicações, contraindicações, vantagens, desvantagens das alternativas reabilitadoras mais comuns utilizando PPRs e o impacto desses tratamentos na qualidade de vida relacionada à saúde bucal dos pacientes. Foi realizada uma pesquisa ampla na literatura, com a utilização dos termos "Prótese Parcial Removível", "Qualidade de Vida", "Saúde bucal"; "Satisfação do Paciente", no período entre 1990 e 2018, no Medline, Google Scholar, internet e livros didáticos. Foi demonstrado que a reabilitação com PPRs associadas a implantes resultou em melhor qualidade de vida associada à saúde bucal dos usuários, seguida por PPRs retidas por encaixe e PPRs convencionais. Entretanto, o profissional deve considerar as condições sistêmicas, bucais e econômicas de cada paciente, tendo o conhecimento biomecânico bem como a ciência dos benefícios e das desvantagens de cada tipo de tratamento para estabelecer um correto diagnóstico do caso e, assim, indicar o melhor tipo de PPR. Dessa forma, é possível oferecer o melhor tratamento para cada paciente parcialmente edêntulo, devolvendo estética e função de maneira satisfatória de modo a resultar em maior nível de satisfação e qualidade de vida(AU)

The purpose of this study was to discuss, through a review of the literature, indications, contraindications, advantages, disadvantages of the most common rehabilitation alternatives using RPDs and the impact of these treatments on patients' oral health quality of life. A broad research was conducted in the literature, using the terms "Partial Removable Prosthesis", "Quality of Life", "Oral Health"; "Patient Satisfaction" in the period between 1990 and 2018, in Medline, Google Scholar, internet and textbooks. It was demonstrated that rehabilitation with RPDs associated with implants resulted in a better oral health quality of life of users, followed by RPDs with attachments and conventional RPDs. However, the professional should consider the systemic, oral and economic conditions of each patient, based on the biomechanical knowledge, as well as the science of the benefits and disadvantages of each type of treatment to establish a correct diagnosis of the case, and thus, indicate the best type of RPD. In this way, it is possible to offer the best treatment for each partially edentulous patient, returning aesthetics and function in a satisfactory manner in order to result in a higher level of satisfaction and quality of life(AU)

Rehabilitación oral en paciente con alteración de la dimensión vertical oclusal aplicando un enfoque multidisciplinario / Oral rehabilitation in patient with alteration of vertical dimension occlusal applying a multidisciplinary approach

El objetivo de éste caso clínico fue restaurar las funciones del sistema estomatognático mediante confección de prótesis convencional combinada, restableciendo de esta manera la dimensión vertical alterada. Caso clínico: Paciente de sexo masculino, 64 años de edad, edéntulo parcial superior clase II de Kennedy modificación 1 e inferior clase II de Kennedy, el motivo de consulta fue la atrición de las piezas dentarias antero superiores e inferiores evidenciando disminución de la dimensión vertical, se realizó tratamiento de conductos con fines protésicos; confección de espigos muñones y se restableció una dimensión vertical terapéutica a través de prótesis superior e inferior; para posteriormente lograr una rehabilitación definitiva mediante prótesis fija y prótesis parcial removible convencional. Las prótesis combinadas definitivas son los dispositivos protéticos que mantienen la dimensión vertical en el tiempo.

The aim in the present case report was re-establish stomatology system functions by conventional mixed dental prosthesis for recovering altered vertical dimension. Clinical case: A 64 years old male patient with upper partial edentulism, Kennedy class II-1 and also lower partial edentulism but Kennedy class II. Patient's chief complaint was dental wearing and an evident oclusal vertical dimension loss. Endodontic treatment was done focusing it in dental prosthetic rehabilitation. Thus therapeutic vertical dimension was reestablished with fixed and removal dental prosthesis. Later, definitive dental therapeutic rehabilitation was attained with fixed and conventional removable dental prosthesis. That mixed dental rehabilitation is an alternative which recovers and maintains oclusal vertical dimension through the time.

Restoration of partial removable dental prosthesis after fabricating of surveyed crowns utilizing electronic surveying: a case report

Adoption of CAD/CAM milling in dentistry has allowed production of more analytic and precise prosthesis. Such precision enables definite path of insertion and undercut to be provided in removable partial denture especially when designing a surveyed crown on an abutment tooth. This case is about the production of surveyed crown with proper path of insertion utilizing CAD/CAM electronic surveying method on a patient with edentulous maxilla. Resulting removable partial denture fit well and showed acceptable stability and retention with no clinical problem.

A preliminary study on the forming quality of titanium alloy removable partial denture frameworks fabricated by selective laser melting / 中华口腔医学杂志

Objective@#To evaluate the processing accuracy, internal quality and suitability of the titanium alloy frameworks of removable partial denture (RPD) fabricated by selective laser melting (SLM) technique, and to provide reference for clinical application.@*Methods@#The plaster model of one clinical patient was used as the working model, and was scanned and reconstructed into a digital working model. A RPD framework was designed on it. Then, eight corresponding RPD frameworks were fabricated using SLM technique. Three-dimensional (3D) optical scanner was used to scan and obtain the 3D data of the frameworks and the data was compared with the original computer aided design (CAD) model to evaluate their processing precision. The traditional casting pure titanium frameworks was used as the control group, and the internal quality was analyzed by X-ray examination. Finally, the fitness of the frameworks was examined on the plaster model.@*Results@#The overall average deviation of the titanium alloy RPD framework fabricated by SLM technology was (0.089±0.076) mm, the root mean square error was 0.103 mm. No visible pores, cracks and other internal defects was detected in the frameworks. The framework fits on the plaster model completely, and its tissue surface fitted on the plaster model well. There was no obvious movement.@*Conclusions@#The titanium alloy RPD framework fabricated by SLM technology is of good quality.

Removable Partial Denture Using Anterior Implant-Supported Fixed Prostheses for Edentulous Patients: A Case Report

This case study was to report the possible increase in the denture retention and psychological relief using the implant-supported fixed prostheses in a completely edentulous patient. The implants were placed in the anterior portion of the mandible in a patient who had completely edentulous state following the extraction of residual abutment teeth, and consequently a distal extension removable partial denture was fabricated. The patient's adaptation and satisfaction to the new prosthesis was monitored and confirmed in terms of masticatory function and esthetics, by restoring the oral condition similar to initial status before the residual teeth extraction. After 6 months, radiographic examination confirmed that both the abutment teeth and the implants were stable and well maintained. Considering the relatively short clinical follow-up period, however, continuous long-term monitoring was required.

Cytotoxicity analysis of electrostatically applied epoxy coating onto CO-CR alloy / Análise da citotoxidade de pintura epóxi na aplicação eletrostática sobre liga de CO-CR

Objective: To investigate the biological effect of a new method to camouflage the cobalt-chromium (CoCr) metal structure of an RPD, onto which an electrostatic paint was applied.Methods: In vitro cytotoxicity of epoxy Politherm NOBAC30C (Weg Industries SA, Santa Catarina, Brazil) in combination with polished CoCr was tested by placing it in contact with cultured human fibroblasts and comparing it with polystyrene (control surface). The cells were cultured in the presence of the test surfaces for 24, 48, 72, 94 and 120 hours. The number of viable and non-viable cells was established by manual counting. The Tukey test was used to statistically analyze cell counts between the groups.Results: The results showed that cell proliferation was similar between the groups (p =0.2174). It was observed that at 24, 48 and 72 h, there was no significant increase in cell proliferation in all groups. From 96 to 120 h, an increase in cell proliferation was observed in all groups, with no significant difference between them (p>0.05).Conclusion: The epoxy paint studied showed no cytotoxicity in vitro.

Objetivos: Analisar, biologicamente, a possibilidade do uso de pintura por aplicação eletrostática.Métodos: Por meio de testes in vitro de citotoxicidade, comparando o comportamento da tinta epóxi Politherm 30 Nobac C (Weg Indústrias S.A, Santa Catarina, Brasil) com CoCr polido e poliestireno em contato com cultura de fibroblastos humanos. Esse teste foi realizado através de contagem de células viáveis e não viáveis em tempos de 24, 48, 72, 94 e 120 horas. Para a contagem de células viáveis foi aplicada a Análise Estatística de Tukey.Resultados: Os resultados obtidos na presente pesquisa mostraram que o comportamento de crescimento celular foi estatisticamente semelhante entre grupos (p=0,2174). Observou-se que nos tempos de 24, 48 e 72 horas, não houve aumento estatisticamente significante da proliferação celular, mantendo-se o padrão para todos os grupos estudados. A partir de 96 e 120 h observamos um aumento da proliferação celular para todos os grupos estudados, sem diferenças entre os mesmos também (p>0,05). Para os resultados de células inviáveis, aplicou-se a Análise não Paramétrica de Kruskal Wallis e o teste de Dunn, devido à baixa taxa de morte celular, sem diferença estatisticamente entre os grupos (p>0,05).Conclusão: Conclui-se, portanto, que a pintura Epóxi estudada não apresentou citotoxicidade para os testes realizados in vitro.

Influence of attachment type on stress distribution of implant-supported removable partial dentures / 北京大学学报(医学版)

Objective: To compare influences of different retention attachments on stress among supporting structures .Methods: By 3-dimensional laser scanner and reverse engineering computer aided design ( CAD) software , a basic partially edentulous digital model with mandibular premolar and molar missing was established .Implant attachment and removable partial dentures ( RPD) were added into the basic model to build three kinds of models: RPD only, RPD +implant +Locator attachment , and RPD +implant +Magfit attachment .Vertical and inclined loads were put on artificial teeth unilaterally . By means of 3-dimensional finite element analysis , the stress distribution and displacement of the main supportive structures were compared . Results: A complete 3-dimensional finite element model was established , which contained tooth structure , and periodontal structures .The displacement of the denture was smaller in Locator (9.38μm vertically, 45.48μm obliquely) and Magfit models (9.54μm vertically, 39.45 μm obliquely) compared with non-implant RPD model (95.27 μm vertically, 155.70 μm oblique-ly) .Compared with the two different attachments , cortical bone stress value was higher in Locator model ( Locator model 10.850 MPa vertically , 43.760 MPa obliquely;Magfit model 7.100 MPa vertically , 19.260 MPa obliquely).The stress value of abutment periodontal ligamentin Magfit model (0.420 MPa vertically) was lower than that in Locator model (0.520 MPa vertically).Conclusion:The existence of implant could reduce maximum von Mises value of each supportive structure when Kennedy Ⅰpartially edentulous mandible was restored .Comparing the structure of Magfit and Locator attachment , the contact of Magfit attachment was rigid , while Locator was resilient .Locator attachment could improve stability of the denture dramatical -ly.Locator had stronger effect on defending horizontal movement of the denture .

Signs of Combination Syndrome and removable partial denture wearing / Sinais da Síndrome da Combinação e o uso de prótese parcial removível

Introduction: Combination Syndrome (CS) is a pathological condition observed in maxillary complete denture (CD) and mandibular removable partial denture (RPD) wearers. Purpose: The aim of this study was to observe and measure the prevalence of CS signs in treatment-seeking wearers of maxillary CD associated or not with RPD (mandibular Kennedy Class I). The association between RPD wearing and the number of CS clinical signs was also evaluated. Material and method: The sample included 62 patients seen at the Department of Dentistry, Federal University of Rio Grande do Norte (UFRN). A clinical oral examination was conducted to assess the presence of specific clinical signs of CS as described by Kelly (1972): bone resorption in the maxillary anterior region, tuberosity overgrowth, palatal papillary hyperplasia, extrusion of mandibular anterior teeth and bone resorption in the mandibular posterior region. The chi-square test at the 95% level of significance was used to test the association between dependent and independent variables. Result: Mandibular resorption was the most frequent complication (93.5%). There was a statistically significant difference between RPD wearers and non-wearers with regard to extrusion of mandibular anterior teeth (p = 0.045). Conclusion: Within the limitations of the present study, a high prevalence of CS clinical signs was observed, but no association between RPD wearing and syndrome characteristics was found. .

Introdução: A Síndrome da Combinação (SC) é uma condição patológica associada aos pacientes usuários de prótese total maxilar e prótese parcial removível (PPR) mandibular. Objetivo: Observar e mensurar a prevalência dos sinais da Síndrome da Combinação encontrados em pacientes usuários de prótese total maxilar na presença ou ausência de PPR mandibular (Classe I de Kennedy); e averiguar uma possível associação entre a utilização de PPR e a prevalência dos sinais clínicos da síndrome. Material e método: A amostra foi composta por 62 pacientes atendidos no Departamento de Odontologia da Universidade Federal do Rio Grande do Norte (UFRN). O exame clínico intrabucal foi realizado para a verificação da presença ou ausência dos sinais clínicos específicos da Síndrome da Combinação, descrita por Kelly (1972): reabsorção óssea na região anterior da maxila, aumento das tuberosidades, hiperplasia papilar palatina, extrusão dos dentes naturais inferiores anteriores e reabsorção óssea posterior mandibular (variáveis dependentes). Para determinação da associação entre as variáveis dependentes e independentes (uso de PPR inferior e tempo de edentulismo superior), foi utilizado o teste qui-quadrado com significância de 95%. Resultado: A característica mais frequente foi a presença de reabsorção mandibular (93,5%). Quanto à associação entre o uso de PPR inferior e as características da Síndrome da Combinação, só houve diferença estatisticamente significativa entre portadores e não portadores de PPR com relação à extrusão dos dentes inferiores anteriores (p = 0,045). Conclusão: Dentro ...

Opciones de tratamiento prótésico en niños con oligodoncias por displasia ectodérmica hidrótica / Prosthetic Treatment Options for Children with Oligodontia due to Hidrotic Ectodermal Dysplasia

La reposición de los dientes no solamente influye en la adecuada alimentación y fonética, sino que también mejora la sonrisa y la apariencia personal, además del aspecto positivo que produce en el estado de salud psicológico y emocional de los niños afectados. Se presentan tres casos clínicos de niños con oligodoncias asociadas a displasia ectodérmica hidrótica, atendidos en la consulta de prótesis de la Clínica Estomatológica de Especialidades de Cienfuegos. Fueron rehabilitados con prótesis parcial removible acrílica, sobredentadura y prótesis parcial fija, respectivamente. Estas constituyen opciones de tratamiento efectivas, que solucionan el problema estético y funcional de los pacientes, y por tanto, mejoran su calidad de vida.

Replacement of teeth not only contributes to adequate nutrition and phonetics, but also improves the smile and appearance, in addition to its positive impact on the psychological and emotional health of the affected children. Three cases of children with oligodontias associated with hidrotic ectodermal dysplasia who were treated at the prosthetics consultation of the Specialized Dental Clinic in Cienfuegos are presented. They were rehabilitated through acrylic removable partial dentures, overdenture and fixed partial denture, respectively. These are effective treatment options that solve the aesthetic and functional problems of the patients, and therefore improve their quality of life.

Fabrication of a metal-ceramic crown to fit an existing partial removable dental prosthesis using ceramic pressed to metal technique: a clinical report

Fabricating a crown to retrofit an existing abutment tooth for a partial removable dental prosthesis (PRDP) is one of the most time-consuming and labor-intensive clinical procedures. In particular, when the patient is concerned with esthetic aspects of restoration, the task of fabricating becomes more daunting. Many techniques for the fabrication of all-metallic or metal-ceramic crowns have been discussed in the literature. This article was aimed to describe a simple fabrication method in which a retrofitting crown was fabricated for a precise fit using a ceramic-pressed-to-metal system.

Análise comparativa da condição de dentes pilares de próteses parciais removíveis intercaladas e de extremidades livres / Comparative analysis of abutment teeth condition of tooth-supported and extension-base removable partial dentures

O objetivo deste estudo foi avaliar a condição dental e periodontal dos dentes pilares diretos de próteses parciais removíveis de extremidade livre (classes I e II de Kennedy), em comparação com os dentes pilares diretos de próteses intercaladas (classes III e IV de Kennedy). Foram avaliadas condições clínicas como o índice de placa bacteriana, presença de inflamação gengival, profundidade de sondagem, presença de cárie e cálculo e grau de mobilidade dental. Para a avaliação clínica foram selecionados, aleatoriamente, 37 pacientes (6 do sexo masculino e 31 do sexo feminino), totalizando 44 próteses, sendo 21 de extremidade livre e 23 intercaladas. Os pacientes não receberam qualquer tipo de tratamento prévio e foram avaliados por um único examinador. Os resultados indicaram que houve diferença significativa no índice de placa e na inflamação gengival entre os dois grupos de próteses, sendo maior no grupo de extremidade livre. De acordo com os resultados, concluiu-se que as próteses parciais removíveis de extremidades livres apresentaram maior efeito adverso sobre os dentes pilares diretos, em comparação com as próteses intercaladas.

The aim of this study was to assess and compare dental and periodontal condition of direct abutment teeth of extension base RPDs (Kennedy classes I and II) and tooth supported RPDs (Kennedy classes III and IV). Clinical conditions such as plaque index, gingival inflammation, pocket depth, presence of carious lesions and calculus, and tooth mobility were assessed, Thirty seven patients were assigned at ramdom for clinical assessment, 6 males and 31 females, totalizing 44 prostheses (21 extension base prostheses and 23 tooth supported prostheses). The patients did not receive any kind of previous treatment and were evaluated by only one examiner. Results showed that plaque index and gingival inflammation were significantly higher in the extension-base group. According to these results, the extension-base RPDs showed greater negative effects on direct abutment teeth than tooth-supported RPDs.

Desordens temporomandibulares em usuários de prótese parcial removível: prevalência de acordo com a classificação de Kennedy / Temporomandibular disorders in patients with removable partial dentures: prevalence according to Kennedy classification

Objetivo: O objetivo deste estudo foi determinar a prevalência das desordens temporomandibulares em pacientes com prótese parcial removível, de acordo com a classificação de Kennedy. Método: A população estudada consistiu de pacientes que procuraram tratamento na Universidade Estadual de Ponta Grossa. Os pacientes selecionados eram usuários de prótese total superior e prótese parcial removível inferior, e esse uso, à época do estudo, fazia entre 1 e 5 anos. Os pacientes foram divididos em cinco grupos (n = 15): G1: usuários de prótese total superior e prótese parcial removível inferior Classe I (Kennedy); G2: usuários de prótese total superior e prótese parcial removível inferior Classe II (Kennedy); G3: usuários de prótese total superior e prótese parcial removível inferior Classe III (Kennedy); G4: usuários de prótese total superior e prótese parcial removível inferior Classe IV (Kennedy), e G5: pacientes totalmente dentados (grupo controle). O questionário de Fonseca foi aplicado para verificar o grau de DTM. O teste qui-quadrado (α = 0,05) foi usado para avaliar a associação entre as variáveis. Resultado: Nenhuma diferença estatística (P > 0,05) foi encontrada entre os grupos. Em todos os grupos, os pacientes apresentaram DTM leve ou moderada. Conclusão: Os resultados deste estudo clínico mostraram que a presença de DTM em pacientes usuários de prótese não pôde ser correlacionada ao uso de prótese, já que a presença de DTM para pacientes desdentados e dentados apresentou-se semelhante.

Objective: The aim of this study was to determine the prevalence of temporomandibular disorders in patients with removable partial dentures according to Kennedy classification. Method: The population consisted of patients who required care at the State University of Ponta Grossa. The patients wore complete upper and lower removable partial dentures between 1 to 5 years. The patients were divided into five groups (n = 15): G1: wearer of complete maxillary denture opposed by a Class I (Kennedy) removable partial denture; G2: wearer of complete maxillary denture opposed by a Class II (Kennedy) removable partial denture; G3: wearer of complete maxillary denture opposed by a Class III (Kennedy) removable partial denture; G4: wearer of complete maxillary denture opposed by a Class IV (Kennedy) removable partial denture and G5: fully dentate patients (control group). Fonseca's questionnaire was applied to verify the level of TMD. The qui-square test (α = .05) was used to analyze association between the variables. Result: No statistical difference (P > 0.05) was found among groups. All groups showed mild or moderate TMD. Conclusion: The findings from this clinical study showed that the presence of TMD in wearers of removable partial denture could not be correlated to the classification of Kennedy, since the presence of TMD for edentulous patients and dentate patients appeared similar.

A importância do restabelecimento da dimensão vertical de oclusão na reabilitação protética / The importance of restoring occlusal vertical dimension in the prosthetic rehabilitation

Introdução: O restabelecimento da dimensão vertical de oclusão (DVO) é de grande importância para a confecção de trabalhos protéticos, embora não seja levada em consideração na maioria dos planejamentos. Objetivo: Este trabalho teve o propósito de, através de uma revisão da literatura, discutir aspectos relacionados com os danos causados pela alteração da DVO, métodos para a sua determinação e técnicas para o seu restabelecimento. Conclusão: Após a análise da literatura se observou que: caso a DVO não for restabelecida corretamente, permanecendo o aumento ou a diminuição desta, haverá a produção de danos aos dentes, músculos, articulação, deglutição e fonação, e até mesmo na postura do paciente, podendo afetar seu equilíbrio. Em relação aos métodos de determinação da DVO, dentre os mais comumente utilizados são o métrico, o fonético e o das proporções faciais, sendo que todos têm suas limitações e devem ser utilizados associados, para diminuir a possibilidade de erros. A utilização de próteses provisórias antes do tratamento protético definitivo é indicada para uma melhor avaliação da resposta do paciente ao restabelecimento da DVO. Sendo assim, o estabelecimento de um protocolo de atuação aproximando a prática clínica com a ciência é a melhor forma de se desenvolver um tratamento reabilitador de excelência.

Introduction: Restoration of occlusal vertical dimension (OVD) is of great importance for the preparation of prosthetic works, although it is not taken into consideration in most treatment planning. Aim: This study aimed to, through a literature review, discuss issues related to the damage caused by the change in OVD, methods for their determination and techniques for its restoration. Conclusion: It was conclude that: if the OVD is not properly restored, remaining the increase or decrease of this, they will produce damage to teeth, muscles and TMJ, in swallowing and speech, and even the posture of the patient and may affect your balance, there are several methods for the OVD determination and are classified as metric, phonetic or facial proportions. They all have their limitations and can be used associated to decrease the possibility of errors, the use of temporary prosthesis before definitive prosthetic treatment is indicated for a better assessment of the patient’s response to the restoration of DVO, and establishing a protocol of action approaching science with clinical practice is the best way to develop a rehabilitation treatment for excellence.

Prevalência dos tipos de arcos desdentados, preparo de boca e qualidade dos modelos para próteses removíveis na Paraíba / Prevalence of edentulous dental arch types, mouth preparation and quality of plaster models for removable partial dentures in the State of Paraiba

A prótese parcial removível instalada sem o preparo prévio da boca tende a se deteriorar precocente além de provocar danos ao aparelho mastigatório. Objetivo: Avaliar a execução do preparo da boca em modelos de trabalhos enviados para laboratórios de próteses dentárias, em cinco cidades do Estado da Paraíba. Material e métodos: Dois examinadores calibrados analisaram 1000 modelos de trabalho e preencheram para cada modelo um formulário com seis itens. Resultados: Revelaram que a arcada superior representou 53,1% da amostra. Com relação à classificação de Kennedy, 33,7% dos modelos pertenciam à classe III, 29,7% à classe I, 28,7% e 7,9% às classes II e IV respectivamente. Noventa e dois por cento da amostra não apresentou qualquer esboço de preparo da boca. Quanto ao material empregado para a obtenção dos modelos, 61% foram confeccionados com gesso tipo IV, 35,6% gesso tipo III e 3,4% gesso tipo II. Conclusões: Concluiu-se que o preparo da boca é realizado com menor frequência nas cidades do interior, mesmo assim o índice de preparo em João Pessoa é muito baixo

Removable partial dentures installed without prior mouth preparation tend to deteriorate prematurely, in addition to causing damage to the masticatory apparatus. Objective: To assess mouth preparation performance on master casts sent to prosthodontics laboratories in five towns located in the state of Paraiba. Materials and method: Two calibrated examiners analyzed 1,000 casts, filling out a six-item form for each cast. Results: Data revealed that the upper teeth represented 53.1% of the sample. As regards Kennedy's classification, 33.7% of the casts were Class III; 29.7% were Class I; 28.7% and 7.9% were Class II and Class IV, respectively. Ninety-two percent of the sample showed no trace of mouth preparation. In relation to the material used to obtain the casts, 61% were prepared using Type IV gypsum; 35.6% used Type III gypsum and 3.4% used Type II gypsum. Conclusion: Mouth preparation has been carried out less frequently in the inner towns, even though preparation rates in the state capital of Paraiba (Joao Pessoa) was found to be very low as well

Reabilitação Oclusal com Prótese Parcial Removível Provisória Tipo “Overlay” –Relato de Caso / Occlusal Rehabilitation with Overlay Provisional Removable Partial Denture – Case Report

Um planejamento adequado de uma reabilitação protética nãodeve imputar o restabelecimento da dimensão vertical deoclusão (DVO) às próteses novas, sob o risco do pacientenão se adaptar a uma nova condição, uma vez que énecessário um período mínimo para a readaptação a umanova DVO. Neste artigo realizou-se a reabilitação protéticacom próteses parciais removíveis provisórias (PPRs) do tipo“overlay” ou de recobrimento oclusal, previamente aotratamento definitivo, pois o paciente apresentou consideráveldiminuição da DVO, utilizando-se pra isso trêstécnicas de determinação da DVO. Conclui-se que a utilizaçãode próteses parciais removíveis provisórias é de grandeimportância no início do tratamento reabilitador, visando aadaptação do paciente a uma nova condição oclusal...

An appropriate design of a prosthetic rehabilitation shouldnot impute the restoration of occlusal vertical dimension (OVD)to new prostheses, at the risk of the patient does not adaptto a new condition, since a certain amount of time is oftennecessary for adaptation to a new OVD. This articleperformed prosthetic rehabilitation with an overlay provisionalremovable partial denture prior to definitive treatment becausethe patient showed a considerable decrease in the OVD.Three techniques for OVD determination were used. It ispossible to conclude that the use of interim removable partialdentures is of great importance at the beginning of therehabilitation treatment in order to adapt the patient to a newocclusal condition...