5 studies at high risk of bias were included in this review of the success of restoration in posterior root filled teeth findings suggest that the more tooth remaining teh better the treatment outcome.
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This review of the effect of endodontic access on fracture resistance of all-ceramic crowns included 8 in-vitro studies providing some indication of potential factors that may impact on fracture resistance.
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This review of failure rate of single-unit prostheses versus direct restorations in vital posterior teeth included 14 studies (5 RCTs) finding that composite had a significantly higher failure rate than amalgams, regardless of the remaining tooth structure. For teeth with fewer than 2 remaining walls, direct restorations presented significantly higher failure rates than crowns .
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Only 7 small studies at high risk of bias were available for this review of preformed paediatric aesthetic crowns. They provide little evidence on which to r change of practice particular for posterior teeth where the use of stainless steel crowns is recommended.
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This review of the failure rates of all-ceramic crowns included 14 (9 prospective, 5 retrospective) studies. Using a broad definition of failure there was little difference between rates in anterior and posterior crowns.
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This review of endocrown restorations identified 8 studies only 3 of which were clinical. These 3 clinical studies were very small and two of them were retrospective providing very low quality evidence to support their effectiveness.
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This review of corded vs. cordless gingival retraction systems included 7 trials. Both may have a role with corded systems being suggested when there is a greater need for gingival displacement.
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This update of a 2012 Cochrane review of the effectiveness of crowns or conventional fillings for root filled teeth found insufficient evidence to assess the effectiveness of either approach.
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This small trial found no difference between either Procera or IPS e.max Press crown in amelogenesis imperfecta patients in the short term. The survival rate at 2 years was 97% with only 3% of teeth suffering with endodontic complications.
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This rapid review from the Canadian Agency for Drugs and Technologies in Health (CADTH) identified 29 studies including 10 systematic reviews. The findings suggest a lower long term survival rate for ceramic crowns (48%) compared with porcelain fused to metal crowns (62%).
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