Margin quality and microleakage of Class II composite resin restorations

• Published in: The Journal of the American Dental Association (1939) Vol. 114; no. 1; p. 49
• Main Authors: Lui, J L, Masutani, S, Setcos, J C, Lutz, F, Swartz, M L, Phillips, R W
• Format: Journal Article
• Language: English
• Published: England 01-01-1987
• Subjects: Calcium Radioisotopes; Composite Resins; Dental Leakage - diagnosis; Dental Leakage - etiology; Dental Restoration, Permanent - methods; Dental Restoration, Permanent - standards; Humans; Microscopy, Electron, Scanning; Surface Properties
• ISSN: 0002-8177
• DOI: 10.14219/jada.archive.1987.0045

Margin quality and isotope microleakage analyses of Class II restorations placed in extracted human molars were compared using various composite resins and placement techniques. At occlusal margins, the traditional (experimental) composite resin restoration placed by the incremental technique showed less microleakage than did the traditional (commercial) [corrected] composite resin restoration placed by the bulk technique. In each group, the occlusal and proximal adaptations had significantly higher "excellent margin" than did the cervical adaptation. Thus, the marginal adaptation at the cervical aspect of conventional Class II composite resin restorations may present a problem with respect to microleakage.