RESUMO
OBJECTIVES: To investigate if general dental practitioners (GDPs) in private practice in Jordan follow universal guidelines for preparation of anterior teeth for resin bonded all-ceramic crowns (RBCs). MATERIAL AND METHODS: A sample (n=100) of laboratory models containing 208 tooth preparations for IPS Empress and In Ceram, featuring work from different GDPs, was obtained from 8 commercial dental laboratories. Aspects of preparations were quantified and compared with accepted criteria defined following a review of the literature and recommendations of the manufactures' guidelines. RESULTS: Subgingival margins on the buccal aspect were noticed in 36 percent of the preparations, 54 percent demonstrated overpreparation with a tendency to overprepare the teeth on the mesiodistal plane more than buccolingual plane. Twenty percent of samples presented a shoulder finish line while a chamfer margin design was noticed in 39 percent. Twenty-nine percent and 12 percent of samples had either a feathered or no clear margin design respectively. Incisal underpreparation was observed in 18 percent of dies of each type. Only 17 percent of all preparations were found to follow the recommended anatomical labial preparations while 29 percent of the RBC preparations were found to have the recommended axial convergence angle. In total, 43 percent of preparations were found to have the recommended depth of the finish line. CONCLUSIONS: It was found that relevant guidelines for RBC preparations were not being fully adhered to in private practice in Jordan.
Assuntos
Humanos , Coroas , Cerâmica/uso terapêutico , Colagem Dentária/métodos , Padrões de Prática Odontológica/normas , Preparo Prostodôntico do Dente/normas , Óxido de Alumínio , Porcelana Dentária , Fidelidade a Diretrizes , Jordânia , Laboratórios Odontológicos , Prática Privada/normas , Preparo Prostodôntico do Dente/métodosRESUMO
OBJECTIVES: To investigate if general dental practitioners (GDPs) in private practice in Jordan follow universal guidelines for preparation of anterior teeth for resin bonded all-ceramic crowns (RBCs). MATERIAL AND METHODS: A sample (n=100) of laboratory models containing 208 tooth preparations for IPS Empress and In Ceram, featuring work from different GDPs, was obtained from 8 commercial dental laboratories. Aspects of preparations were quantified and compared with accepted criteria defined following a review of the literature and recommendations of the manufactures' guidelines. RESULTS: Subgingival margins on the buccal aspect were noticed in 36% of the preparations, 54% demonstrated overpreparation with a tendency to overprepare the teeth on the mesiodistal plane more than buccolingual plane. Twenty percent of samples presented a shoulder finish line while a chamfer margin design was noticed in 39%. Twenty-nine percent and 12% of samples had either a feathered or no clear margin design respectively. Incisal underpreparation was observed in 18% of dies of each type. Only 17% of all preparations were found to follow the recommended anatomical labial preparations while 29% of the RBC preparations were found to have the recommended axial convergence angle. In total, 43% of preparations were found to have the recommended depth of the finish line. CONCLUSIONS: It was found that relevant guidelines for RBC preparations were not being fully adhered to in private practice in Jordan.
Assuntos
Cerâmica/uso terapêutico , Coroas , Colagem Dentária/métodos , Padrões de Prática Odontológica/normas , Preparo Prostodôntico do Dente/normas , Óxido de Alumínio , Porcelana Dentária , Fidelidade a Diretrizes , Humanos , Jordânia , Laboratórios Odontológicos , Prática Privada/normas , Preparo Prostodôntico do Dente/métodosRESUMO
Embora alguns estudos de avaliaçäo clínica da eficácia dos resultados da instalaçäo de PPRs tenham sido elaborados, nenhum deles utilizou medidas estandardizadas abrangentes que envolvessem tanto os aspectos biomecânicos das PPRs quanto as conseqüências clínicas do tratamento protético. O índice de qualidade do trabalho protético (IQP) foi desenvolvido com a finalidade de compensar os problemas acima descritos, podendo ser utilizado no âmbito de três parâmetros: biomecânica, preparo de boca e avaliaçäo clínica, para futuros estudos de avaliaçäo global dos pacientes portadores de próteses parciais removíveis. Este estudo tem a finalidade de apresentar a nova metodologia do IQP para que o leitor possa aplicá-la, por meio de sistemas de escores, na análise da qualidade de seu trabalho protético