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The effects of occlusal loading on the margins of cervical restorations.
Francisconi, Luciana Fávaro; Graeff, Márcia Sirlene Zardin; Martins, Leandro de Moura; Franco, Eduardo Batista; Mondelli, Rafael Francisco Lia; Francisconi, Paulo Afonso Silveira; Pereira, José Carlos.
Afiliação
  • Francisconi LF; Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil. luff@usp.br
J Am Dent Assoc ; 140(10): 1275-82, 2009 Oct.
Article em En | MEDLINE | ID: mdl-19797558
BACKGROUND: Researchers have proposed the restoration of abfraction lesions, but limited information is available about the effects of occlusal loading on the margins of such restorations. Because abfraction is a well-recognized problem, the authors conducted a study to assess the effects of occlusal loading on the margins of cervical restorations. METHODS: The authors prepared 40 wedge-shaped cavities in extracted premolars and restored them with a resin-based composite. They subjected specimens to occlusal loading (150 newtons, 10(6) cycles) on the buccal cusp, on the central fossa or on the lingual cusp, and they stored the control group specimens in deionized water. The authors used fluorescein to delimit marginal defects and evaluated the defects by using laser scanning confocal microscopy. RESULTS: Results of chi2 and Kruskal-Wallis tests (P < .05) showed that specimens subjected to occlusal loading had a higher percentage of marginal gaps (53.3 percent) than did the control specimens (10.0 percent). There were no differences between groups in marginal defect formation or in defect location, length or width. CONCLUSIONS: Occlusal loading led to a significant increase in gap formation at the margins of cervical resin-based composite restorations. CLINICAL IMPLICATIONS: The clinician cannot underestimate the effects of occlusal loading when restoring teeth with cervical wedge-shaped lesions. If occlusal loading is the main factor contributing to lesion formation, the clinician should identify and treat it before placing the restoration or otherwise run the risk that the restorative treatment will fail because of marginal gap formation.
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Adaptação Marginal Dentária / Restauração Dentária Permanente / Análise do Estresse Dentário / Desgaste dos Dentes Tipo de estudo: Prognostic_studies Limite: Humans Idioma: En Revista: J Am Dent Assoc Ano de publicação: 2009 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Buscar no Google
Adicionar na Minha BVS
Imprimir
XML
PubMed Links

Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Adaptação Marginal Dentária / Restauração Dentária Permanente / Análise do Estresse Dentário / Desgaste dos Dentes Tipo de estudo: Prognostic_studies Limite: Humans Idioma: En Revista: J Am Dent Assoc Ano de publicação: 2009 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido