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[Effect of cavity design on the marginal fit of Class I composite fillings]
P Bergmann1, M J Noack, J F Roulet
1Fachbereich Zahn-, Mund- und Kieferheilkunde der FU Berlin.
Deutsche Zahnarztliche Zeitschrift
|October 1, 1990
Abstract:
16 butt joint (Group A) and 16 beveled (Group B) class I cavities were prepared in extracted molars and filled with two hybrid composite resin materials using the enamel etching technique. Replicas were obtained before and after thermocycling (TC) and a computerized quantitative margin analysis was carried out in the SEM. Statistical analysis revealed significant differences (p less than 0.01) between the two groups only after TC. Group B showed significantly less marginal openings than Group A (A: 50.7%, B: 8.4%) after TC. Class I cavities for hybrid composite resin materials should be beveled.