Journal
JOURNAL OF DENTAL RESEARCH
Volume 89, Issue 10, Pages 1063-1067Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/0022034510376071
Keywords
amalgam; clinical trials; composite materials; risk factor; caries; longevity
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Information about the long-term clinical survival of large amalgam and composite restorations is still lacking. This retrospective study compares the longevity of three-and four-/five-surface amalgam and composite restorations relative to patients' caries risk. Patient records from a general practice were used for data collection. We evaluated 1949 large class II restorations (1202 amalgam/747 composite). Dates of placement, replacement, and failure were recorded, and caries risk of patients was assessed. Survival was calculated from Kaplan-Meier statistics. After 12 years, 293 amalgam and 114 composite restorations had failed. Large composite restorations showed a higher survival in the combined population and in the low-risk group. For three-surface restorations in high-risk patients, amalgam showed better survival.
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