H. Nordbo et al., SAUCER-SHAPED CAVITY PREPARATIONS FOR POSTERIOR APPROXIMAL RESIN COMPOSITE RESTORATIONS - OBSERVATIONS UP TO 10 YEARS, Quintessence international, 29(1), 1998, pp. 5-11
Objective: This clinical trial aimed at studying the long-term perform
ance in routine clinical practice of saucer-shaped Class II resin comp
osite restorations. Methods and materials: Fifty-one preparations were
completed and filled with either of two light-cured posterior composi
tes by seven dentists of the Public Dental Service. The restorations w
ere evaluated annually, using the US Public Health Service criteria, b
itewing radiographs, and dies based on replica impressions. At the fin
al evaluation, the recall rate was 100%. Results: After the mean of 7.
2 +/- 1.3 years of service (censored maximum of 9.6 years), 70% of the
restorations were acceptable for continued use. Caries and technical
deficiencies were the main causes of failure. Conclusion: The saucer c
onfiguration, by respecting and utilizing inherent properties of the r
esin composites, spares sound dentin and is preferable to the box prep
aration.