RESUMO
This article presents a rationale for utilizing complete immediate denture therapy, highlighting various advantages, disadvantages, and contraindications for this treatment. Jerbi's technique for presurgical cast carving is reviewed and a unique case report is detailed, involving a 22-year-old patient whose hopelessly debilitated dentition was treated by full-mouth extraction and placement of a maxillary and mandibular complete immediate denture. In addition, a brief review of changing dietary patterns and social habits is presented in relation to the recent escalation of rampant dental caries in youth and young adult patient populations.
Assuntos
Cárie Dentária/terapia , Técnica de Moldagem Odontológica/normas , Planejamento de Dentadura/métodos , Prótese Total Imediata , Modelos Dentários/normas , Boca Edêntula/reabilitação , Procedimentos Clínicos , Cárie Dentária/complicações , Planejamento de Dentadura/normas , Prótese Total Inferior , Prótese Total Superior , Feminino , Humanos , Mandíbula , Maxila , Boca Edêntula/etiologia , Periodontite/terapia , Extração Dentária , Resultado do Tratamento , Adulto JovemRESUMO
The aim of the present study was to investigate the fracture resistance of zirconia crowns and to compare the results with crowns made of a material with known clinical performance (alumina) in away that reflects clinical aspects. Sixty crowns were made, 30 identical crowns of alumina and 30 of zirconia. Each group of 30 was randomly divided into three groups of 10 crowns that were to undergo different treatments: (i) water storage only, (ii) pre-loading (10 000 cycles, 30-300 N, 1 Hz), (iii) thermocycling (5-55 degrees , 5000 cycles) + pre-loading (10 000 cycles, 30-300 N, 1 Hz). Subsequently, all 60 crowns were subjected to load until fracture occurred. There were two types of fracture: total fracture and partial fracture. Fracture strengths (N) were: group 1, alumina 905/zirconia 975 (P = 0.38); group 2, alumina 904/zirconia 1108 (P < 0.007) and group 3, alumina 917/zirconia 910 (P > 0.05). Total fractures were more frequent in the alumina group (P < 0.01). Within the limitations of this in vitro study, it can be concluded that there is no difference in fracture strength between crowns made with zirconia cores compared with those made of alumina if they are subjected to load without any cyclic pre-load or thermocycling. There is, however, a significant difference (P = 0.01) in the fracture mode, suggesting that the zirconia core is stronger than the alumina core. Crowns made with zirconia cores have significantly higher fracture strengths after pre-loading.
Assuntos
Coroas , Materiais Dentários , Porcelana Dentária , Análise do Estresse Dentário , Óxido de Alumínio , Força Compressiva , Falha de Restauração Dentária , Planejamento de Dentadura/normas , Temperatura Alta/efeitos adversos , Humanos , Teste de Materiais/métodos , Estresse Mecânico , ZircônioRESUMO
Os autores através de uma revisäo da literatura, ressaltam a importância do enceramento de diagnóstico frente ao contorno das restauraçöes protéticas. Tentam deixar claro a importância do enceramento de diagnóstico tanto na fase de planejamento como durante o tratamento. Avaliam as teorias de contorno segundo seus autores, concluindo que devemos evitar o sobrecontorno das regiöes cervicais, através de um preparo adequado e um melhor entrosamento com o técnico de laboratório