Integração dos componentes curriculares Escultura Dental e Prótese Parcial Removível no desenvolvimento de material didático auxiliar para a pré-clínica / Integración de los componentes curriculares Escultura Dental y Prótesis Parcial Removible en el desarrollo de material didáctico auxiliar para el preclínico / Integration of Dental Sculptureand Removable Partial Denture courses in developing instructional material for pre-clinical use

O objetivo deste relato de experiência foi integrar os componentes curriculares Escultura Dental e Prótese Parcial Removível por meio da confecção de macromodelos com nichos em dentes anteriores e posteriores a serem usados como material didático auxiliar.A metodologia teve abordagem descritiva. Foram confeccionados macromodelos em cera dos seguintes elementos dentários: caninos superiores e inferiores, pré-molar superior e molares superiores e inferiores. Em seguida, nichos foram preparados nos elementos,reproduzindo as características da etapa de Preparo de Boca Tipo II ou Protético. Macromodelos com as características individuais de nichos oclusais simples e duplo (interdental) em dentes posteriores foram obtidos, bem como com nichos em cíngulos, tanto confecionados por desgaste como por acréscimo. Diante do conhecimento da anatomia dental e a habilidade manual desenvolvidos na Escultura Dental, os macromodelos confeccionados permitiram uma melhor visualização das características morfológicas dos nichos,sendo considerado um recurso complementar no processo ensino-aprendizagem em Prótese Parcial Removível (AU).

El objetivo de este relato de experiencia fue integrar los componentes curriculares Escultura Dental y Prótesis Parcial Removible mediante la creación de macromodelos con nichos en dientes anteriores y posteriores para ser utilizados como material didáctico auxiliar. La metodología tuvo un enfoque descriptivo. Se realizaron macromodelos en cera de los siguientes dientes: caninos superiores e inferiores, premolares superiores y molares superiores e inferiores. A continuación, se prepararon nichos en los elementos, reproduciendo las características de la etapa de Preparación de la Boca Tipo II o Prótesis. Se obtuvieron macromodelos con las características individuales de nichos oclusales simples y dobles (interdentales) en dientes posteriores, así comonichos en cingulados, ambos creados por desgaste y adición. Dado el conocimiento de la anatomía dental y la habilidad manual desarrollada en la Escultura Dental, los macromodelos realizados permitieron una mejor visualización de las características morfológicas de los nichos, considerándose un recurso complementario en el proceso de enseñanza-aprendizaje en Prótesis Parcial Removible (AU).

The objective of this experience report was to integrate the curricular components of Dental Sculpture and Removable Partial Dentures through the creation of macromodels with rest seat in anterior and posterior teeth to be used as auxiliary teaching material. The methodology had a descriptive approach. Wax macromodels were made of the following teeth: upper and lower canines, upper premolar and upper and lower molars. Next, rest seats were prepared in the elements, reproducing the characteristics of the Type II or Prosthetic Mouth Preparation stage. Macromodels with the individual characteristics of single and double (interdental) occlusal rest seats in posterior teeth were obtained, as well as rest seats in cingulum, both created by wear and with composites. Given the knowledge of dental anatomy and the manual skill developed in Dental Sculpture, the macromodels made enabled better visualization of the morphological characteristics of the rest seats, being considered a complementary resource in the teaching-learning process in Removable Partial Prosthesis (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)

Combinando estratégias de aprendizagem para o desenvolvimento de habilidades e competências na Prótese Parcial Removível pré-clínica: um relato de experiência / Combining learning strategies for developing abilities and competencies in a preclinical Removable Partial Denture course: an experience report

O uso da metodologia ativa no ensino da Odontologia é recomendado nas Diretrizes Curriculares Nacionais, com a finalidade de desenvolver habilidades e competências, assim como de estimular a capacidade reflexiva dos egressos. Em Prótese Parcial Removível (PPR), alguns estudos apontam os benefícios do método centrado no aluno, utilizando diferentes estratégias, como Problem-Based Learning (PBL), Case-Based Learning (CBL) e Team-Based Learning (TBL) com resultados positivos no processo ensino-aprendizagem. Este artigo tem como objetivo relatar a experiência do uso de metodologias ativas como o CBL, a Sala de Aula Invertida e a estratégia do Brainstorming na disciplina de Prótese Parcial Removível da Universidade Federal da Paraíba, estimulando o desenvolvimento do pensamento crítico do aluno no planejamento de arcos parcialmente desdentados desde a fase pré-clínica. Como produto dessa mudança na estratégia pedagógica, desenvolveram-se materiais instrucionais como um checklist de perguntas e um fluxograma que foram implementados como ferramentas facilitadoras no processo ensino-aprendizagem durante as práticas de laboratório. A adaptação de estratégias de ensino com participação ativa dos estudantes pode ser útil na verificação das dificuldades durante o planejamento, as quais podem ser solucionadas previamente aos atendimentos de pacientes nas clínicas. Os materiais instrucionais desenvolvidos na disciplina podem auxiliar os professores de Odontologia a refletir sobre diferentes formas de metodologias no ensino da PPR e inserir o aluno no processo de construção do seu conhecimento (AU).

Active methodologies in dental education have been highly recommended by the National Curricular Guidelines in developing students' abilities and competency, and directly impact on the reflective capacity of new professionals. Some studies on Removable Partial Dentures (RPD) have pointed out benefits of the student- centered method by using different strategies such as Problem-Based Learning (PBL), Case- Based Learning (CBL) and Team-Based Learning (TBL), with positive results in the teaching and learning processes. This article aims to report the experience of using active methodologies such as CBL, Inverted Classroom and Brainstorming techniques as a strategy in the RPD Preclinical Course of the Federal University of Paraíba, focusing on the development of students' critical thinking for planning partial edentulous arches. As a result of this change, instructional materials such as a checklist of questions and a flowchart were developed and have started to be implemented as important tools during the laboratory classes. Adapting teaching strategies with the active participation of students can be a valuable tool to verify difficulties during prosthesis planning. As a result, it can improve self-confidence in determining the mechanical components prior to clinical care. The instructional materials developed can help professors to reflect on different forms of methodologies in RPD teaching and insert students in their own knowledge construction (AU).

[Effect of different support angles on the fitness of removable partial denture framework fabricated using selective laser melting technique].

Objective: To evaluate the fitness of bilateral free-end dentition defect removable partial denture framework fabricated by selective laser melting (SLM) technique with different support angles. Methods: After the control group has been set to eliminate the system error, and according to the standard model of bilateral mandibular posterior teeth loss, eighteen titanium alloy removable partial denture frameworks fabricated by SLM technology were divided into 3 groups with support angles of 0° (horizontal group), 45°(45° group) and 90° (vertical group). Plaster cast with duplicated structure of tissue surface of the removable partial denture (RPD) framework was obtained. A three-dimensional scanner was used to scan original and duplicated plaster casts. The gaps between framework and the model in different parts were analyzed using Geomagic Qualify software to evaluate the fitness of the framework with visual method. Results: The framework fits on the plaster model completely, and its tissue surface fitted on the plaster model well. The deviation between frameworks and plaster casts was calculated as follow: the total deviations of the horizontal, 45°, and vertical group were (0.146±0.017), (0.182±0.015) and (0.185±0.022) mm respectively. The mean deviation of the horizontal group was significantly less than those of the 45° group and the vertical group (P<0.05). Moreover, there was no significant difference in the total deviation between the 45° group and the vertical group. The total deviation of occlusal rest of the horizontal group was significantly less than that of the 45° group (P<0.05). However, no significant difference was detected in the deviation of occlusal rest among the vertical group, the horizontal group, and the 45° group (P>0.05). There was no significant difference in the deviation of occlusal rest among the vertical group, the horizontal group, and the 45° group. The deviation of clasp of the horizontal group was significantly smaller than those of the 45° group and the vertical group (P<0.05). Whereas, there was no significant difference in the deviation of clasp between the 45° group and the 90° group (P>0.05). No significant difference was found in the deviation of lingual bar among the three groups (P>0.05). Conclusions: Among the three kinds of bilateral free-end dentition defect RPD framework fabricated by SLM in different support angles, horizontal printing was proved to reach the minimal deviation, even though the fitness of all three kinds of frameworks can fullfil clinical requirements according to previous studies.

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)

[A preliminary study on the forming quality of titanium alloy removable partial denture frameworks fabricated by selective laser melting].

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.

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.

Shortcomings of prosthodontic rehabilitation of patients living in long-term care facilities.

Removable dentures are a non-invasive, cost-effective prosthodontic solution for the reduced dentition. Their intended purpose is the rehabilitation of harmonious oral function and aesthetics on a long-term basis. The prevalence of removable dentures among patients of advanced age is high and the quality of the dentures is often poor. The aim of this study was to find the most important shortcomings of removable dentures and address the main targets for improving the quality of prosthodontic rehabilitation. The records from dental check-ups in Austrian residential homes were analysed retrospectively. Dental anamnesis questionnaires and data from the clinical examinations of 105 denture wearers were analysed. The functional condition and retention of 192 dentures had been assessed, as well as the impact of the dentures on the intra-oral tissues. Insufficient denture retention was very common, particularly in the lower jaw (56·0%). Problems with the masticatory function were reported by 26.7% of the denture wearers, 11·4% were dissatisfied with the denture aesthetics, and 4·8% had difficulties with phonetics. Traumatic ulcers were found in 18·1%. Cracks, broken pieces (6·3%) or missing denture teeth (2·1%) were rare. It may be assumed that the findings of the present study also apply to a great percentage of community-dwelling seniors. The most important issues in prosthodontic rehabilitation with removable dentures are denture retention and masticatory function. Regular dental check-ups, denture adjustment and, when necessary, relining can maintain the primary denture quality and prevent damages of the oral tissues caused by ill-fitting dentures.

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.

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.

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

Responsabilidade legal sobre modelos de prótese parcial removível / Legal liability concerning stone casts

Objetivo: Verificar junto aos laboratórios que realizam próteses parciais removíveis na cidade de Piracicaba, São Paulo, como eles recebem os modelos enviados pelos cirurgiões-dentistas para confecção dessas próteses. Métodos: A legislação pertinente sobre a responsabilidade civil de todos os envolvidos na confecção e utilização deste tipo de prótese foi igualmente verificada. Para tanto, foi utilizado um questionário com questões estruturadas e abertas, abordando todos os aspectos inerentes ao estudo; submetido e preenchido pelo Técnico em Prótese Dentária responsável pelos laboratórios. Os dados foram analisados por meio de estatística descritiva. Resultados: Verificou-se que o Técnico em Prótese Dentária (100%) é o responsável por todos os laboratórios pesquisados e estes (100%) sabem que cabe ao cirurgião-dentista o planejamento das próteses parciais removíveis. Os respectivos modelos de próteses parciais removíveis representavam uma cavidade bucal praticamente sem preparo prévio à moldagem e estes são enviados sem os respectivos planejamentos. Conclusão: Concluiu-se que todos os profissionais envolvidos com este tipo de trabalho possuem conhecimentos parciais com relação às diversas fases necessárias para obtenção de sucesso neste tipo de tratamento e conhecimentos precários sobre a legislação que norteia suas funções. A responsabilidade civil do cirurgião-dentista, no tocante à área de Próteses Parciais Removíveis, independente da sua classificação (classe I, II, III e IV de Kennedy), é considerada como responsabilidade de meio. No entanto, deve-se destacar que a propaganda e a publicidade podem alterar tal consideração caso o cirurgião-dentista venha a prometer previsibilidade estética, conforme estabelecido no Código de Proteção e Defesa do Consumidor.

Objective: The present study checked how the laboratories that make partial dentures in Piracicaba, São Paulo (Brazil), receive the plaster casts sent by dental surgeons in order to make these kinds of prostheses. Methods: The law regarding civil liability of those involved in manufacturing and using removable partial dentures were also checked out. To this end, aquestionnaire, containing structured and open questions addressing all the aspects associated with the study, was sent to and completed bythe lab technicians responsible for removable partial dentures. The data collected were analyzed by means of descriptive statistics. Results: It was ascertained that the Dental Prosthetics Technician (100%) is the individual responsible for all the laboratories analyzed and theselaboratories (100%) know that the planning of the Removable Partial Dentures is the obligation of the dental surgeon. The respective modelsof removable partial dentures represented an oral cavity with practically no preparation prior to molding and these are sent without therespective planning. Conclusion: It was concluded that the professionals involved in this kind of work have only a partial knowledge of the various stages required to gain success with this kind of treatment and have poor knowledge of the laws that regulate their work. The dentist?s civil liability, with regard to the of Removable Partial Dentures, regardless of classification (Kennedy class I, II, III, IV), is considered to be shared liability. However, it is important to stress that advertising and publicity may change this consideration in cases where the dentist makes promises about esthetical outcomes, as per the Consumer Protection Code.

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...