This review of the clinical performance of self-adhesive flowable composites and flowable composites for occlusal cavities in permanent teeth included 5 RCTs. . While the review found no significant differences between SAFCs and FCs in terms of retention, secondary caries, marginal discoloration, and postoperative sensitivity outcomes the limited number and quality of the small number of available studies mean the findings should be viewed cautiously.
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This review of the clinical effectiveness of bulk-fill versus incrementally layered conventional resin composites included 18 RCTs. Owing to the variety of composite materials and bonding systems used a narrative summary was presented with the findins suggesting no important differences between incremental and bulk-fill techniques.
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This updated Cochrane review of the efficacy and safety of direct composite fillings versus amalgam fillings included 8 RCTs. Low‐certainty evidence suggests that composite resin restorations may have almost double the failure rate of amalgam restorations.
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Nine small in-situ studies were included in this review of the impact of restoration type on secondary caries providing insufficient evidence to make any firm conclusions.
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8 studies were included in this review comparing amalgam with composite in posterior restorations. There was a statistically significant benefit in favour of amalgam for both restoration failure and secondary caries.
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