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OBJECTIVES: This study evaluated the linear dimensional change of polymerization of three materials and two techniques of the union of molding transfers for implant-supported prostheses used in the open-tray technique. MATERIALS AND METHODS: A nylon maxilla-shaped matrix was made, two osseous integrated implants were installed, and, over these two, straight conical mini-pillars were installed. Open-tray impression transfers were attached to the mini-pillars, and a silicone guide was made to standardize the connections between the transfers. The samples were divided into six groups (n = 20): PA (Pattern Resin LS, chemically activated acrylic resin in the single step technique); DU (Durallay, chemically activated acrylic resin in the single step technique); BI (Protemp4, bisacrylic resin in the single step technique); PAC (Pattern Resin LS in sectioning and joining of segments technique); DUC (Durallay, in sectioning and joining of segments technique); and BIC (Protemp4, in sectioning and joining of segments technique). The linear dimensional change values that occurred among these transfers were measured in a profile projector (VB300; Starret) coupled to the Quadra Check device, with a resolution of 0.001 mm, performed by a single calibrated operator. STATISTICAL ANALYSIS: Data were submitted to a two-way analysis of variance and Tukey's test (p < 0.01). RESULTS: Statistically significant mean values were found in all comparisons. The PA showed the lowest mean values (µm) of linear dimensional change, both in the single-step technique and in the sectioning and joining technique, in the following order: BI 255.73 (3.81), DU 173.75 (2.30), PA 95.97 (3.20), BIC 23.82 (1.71), DUC 20.85 (2.53), and PAC 13.27 (2.09). The single-step technique showed the worst results, regardless of the material. CONCLUSION: The sectioning and joining technique reduced the dimensional change in all materials, and the Pattern Resin LS showed the lowest shrinkage mean values, followed by Durallay and Protemp4.

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Uma das mais importantes questões da Odontologia atual é a preservação do esmalte dentário. Nesse contexto, os laminados cerâmicos apresentam excelente reprodução das propriedades ópticas da estrutura dental, especialmente em espessuras mínimas. Este artigo apresenta um caso clínico, esclarecendo indicação, vantagens, desvantagens e limitações das facetas cerâmicas. Concluiu-se que, atualmente, os laminados cerâmicos são a melhor opção de tratamento nos casos de estética elevada, uma vez que é uma reabilitação conservadora que imita fielmente a estrutura dental e sua forma (AU).

One of the most important issues of today's Dentistry is the preservation of sound enamel. In this context, ceramic veneers present excellent reproduction of the optical properties of the dental structure, especially in minimal thicknesses. The current article aims to present a case report, clarifying the indication, advantages, disadvantages, and limitations of laminate veneers. We concluded that the ceramic veneers are currently the best treatment option for elective aesthetic cases, once it is an extremely conservative rehabilitation that faithfully mimics the dental structure and shape, besides being a very predictable treatment (AU).

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RESUMEN

O restabelecimento da dimensão vertical de oclusão (DVO) de pacientes é uma tarefa complexa e, em virtude disso, diversos métodos são empregados, rotineiramente, na busca do correto relacionamento maxilomandibular. Sempre que indicado, o aumento da DVO deve ser feito com próteses fixas para melhor adaptação do organismo à nova condição oclusal. O presente caso clínico descreve uma situação de acentuada perda de DVO, em um paciente parcialmente edentado, com desgastes dentais severos. Depois dessa dimensão ter sido recuperada por meio de coroas provisórias, sem que houvesse presença de alterações funcionais, próteses parciais fixas foram confeccionadas. A utilização de próteses fixas no caso em questão facilitou a obtenção de uma guia canina e guia anterior mais precisas, pelo grande número de elementos pilares. O resultado final deste caso clínico comprovou a efetividade de restabelecer adequadamente a DVO perdida, por meio da confecção de coroas provisórias e próteses fixas sem causar dores e/ou desconforto ao paciente.

Reestablishment of occlusal vertical dimension (OVD) is a complex task therefore different methods are used routinely in the search of proper maxillomandibular relation. When indicated, the increasing of VDO must be done with fixed prosthesis for a better adaptation of the organism to the new occlusal condition. The reported clinical case describes a situation of severe VDO loss in a partially edentulous patient with severe dental wear. After recovery of this position through temporary prosthesis, without any major functional changes, fixed partial dentures (fPD) were used. The use of fPD, in this case has enabled a more precise canine and anterior guidance due to a large number of abutments elements. final results have proved the effectiveness of the use of temporary prosthesis and fixed prostheses proper restoration of lost VDO, without pain and/or discomfort to the patient.

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