ABSTRACT
Introdução: A fim de reduzir custos e tempo clínico envolvidos com o tratamento, Dentistas têm utilizado métodos simplificados, omitindo ou abreviando partes da técnica de confecção das próteses totais. Objetivo: Levantar as práticas utilizadas pelos Cirurgiões-Dentistas para a confecção de próteses totais. Material e método: Os dados foram levantados por meio de um formulário eletrônico contendo perguntas relativas ao perfil e aos procedimentos clínicos utilizados, a fim de quantificar o uso de métodos simplificados e convencionais, bem como para determinar a relação com o perfil desses profissionais. Os resultados foram analisados por meio de análise de Aglomerados. Resultado: As respostas foram dadas, em sua maioria, por homens, tendo a prática clínica como sua principal fonte de renda e clínica privada ou conveniada como ambiente principal de trabalho (n=119). Grande parte dos entrevistados relatou realizar duas moldagens por arcada, utilização de articulador semiajustável com arco facial, determinação de plano oclusal por meio de guias anatômicos, utilização de meios métricos para análise da dimensão vertical de oclusão e determinação direta da relação cêntrica. O próprio Cirurgião-Dentista relatou ser o responsável na fase de seleção de dentes. A estatística identificou dois Aglomerados, com base nas características demográficas e na prática clínica, sendo um grupo formado por generalistas adeptos de perfis mais simplificados e outro formado por profissionais mais especializados em prótese que realizam técnicas convencionais. Conclusão: A adoção de técnicas simplificadas é associada àqueles Dentistas com perfil mais generalista, ...
Introduction: In order to reduce costs and clinical time involved with complete denture treatment, dentists have employed simplified methods based on the reduction or preclusion of certain traditional technical procedures. Purpose: To survey the procedures used by dentists to fabricate complete dentures. Material and method: Data was obtained by an electronic form containing questions about dentists' profile and clinical procedures, in order to quantify traditional and simplified approaches at several moments and to determine them to different professional profiles. Results were evaluated by means of cluster analysis. Result: The majority of respondents were male dentists with clinical practice as their main income source, mainly in private service (n=119). Most participants use to take a pair of impressions from each arch, employ semiadjustable articulators with facebow transfers, shape the occlusal plane with the aid of anatomic references, determine occlusal vertical dimension by metric methods and use mandibular manipulation for centric relation. The dentists performed tooth selection in most cases. Statistical analysis identified two clusters based on demographic characteristics and clinical procedures. General practitioners adopting simplified methods formed the first cluster, whereas prosthodontists used to conventional methods formed the second. Conclusion: General dentists tend to adopt simplified approaches, and prosthodontists tend to work according to traditional academic methods. .
Subject(s)
Data Collection , Surveys and Questionnaires , Mouth, Edentulous , Biomedical Technology , Dentists , Denture, CompleteABSTRACT
A reposição de um incisivo lateral superior ausente pode representar um verdadeiro desafio estético. Dentre as opções disponíveis, a instalação de uma prótese unitária implantossuportada proporciona bons resultados, tanto esteticamente, quanto funcionalmente. Assim, o objetivo deste artigo foi apresentar um caso clínico, no qual um paciente com agenesia do incisivo lateral superior teve a reposição deste dente, através de prótese unitária implantossuportada com conexão protética cone-morse e pilar estético de zircônia. Como resultado, foi obtida uma restauração que supriu as necessidades estéticas e funcionais de um paciente jovem.
The replacement of a missing upper lateral incisor can be a real esthetic challenge. Among the available options, the insertion of a single implant-supported prosthesis can provide good results, both aesthetically and functionally. Thus, the purpose of this study is to present a case in which a patient with agenesis of upper lateral incisor received a Cone-Morse connection design with a screwed zirconia abutment and a final cemented crown. In this way, both funcional and esthetic demands were addressed for this young patient.
Subject(s)
Humans , Female , Adult , Dental Implantation , Dental Prosthesis, Implant-Supported , OsseointegrationABSTRACT
Fluorinated denture base acrylic resins can present more stable physical properties when compared with conventional polymers. This study evaluated the incorporation of a fluoroalkyl methacrylate (FMA) mixture in a denture base material and its effect on roughness and flexural strength. A swelling behavior assessment of acrylic resin specimens (n=3, per substance) after 12 h of FMA or methyl methacrylate (MMA) immersion was conducted to determine the solvent properties. Rectangular specimens (n=30) were allocated to three groups, according to the concentration of FMA substituted into the monomer component of a heat-polymerized acrylic resin (Lucitone 550), as follows: 0 percent (control), 10 percent and 20 percent (v/v). Acrylic resin mixed with concentrations of 25 percent or more did not reach the dough stage and was not viable. The surface roughness and flexural strength of the specimens were tested. Variables were analyzed by ANOVA and Tukey's test (a=0.05). Immersion in FMA produced negligible swelling, and MMA produced obvious swelling and dissolution of the specimens. Surface roughness at concentrations of 0 percent, 10 percent and 20 percent were: 0.25 ± 0.04, 0.24 ± 0.04, 0.22 ± 0.03 mm (F=1.78; p=0.189, not significant). Significant differences were found for flexural strength (F=15.92; p<0.001) and modulus of elasticity (F=7.67; p=0.002), with the following results: 96 ± 6, 82 ± 5, 84 ± 6 MPa, and 2,717 ± 79, 2,558 ± 128, 2574 ± 87 MPa, respectively. The solvent properties of FMA against acrylic resin are weak, which would explain why concentrations over 20 percent were not viable. Surface changes were not detected after the incorporation of FMA in the denture base acrylic resin tested. The addition of FMA into denture base resin may lower the flexural strength and modulus of elasticity, regardless of the tested concentration.