Journal
JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY
Volume 76, Issue 2, Pages 316-324Publisher
W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1016/j.joms.2017.08.025
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Purpose: To assess whether repeated abutment disconnections and reconnections have any impact on peri-implant bone resorption and soft tissue healing. Materials and Methods: Electronic and manual searches were conducted for English-language articles published up to March 2017 that identified a relation between repeated disconnections of implant abutments (PA group) and prosthetic or implant failures, complications, marginal bone loss (MBL), soft tissue healing, and esthetic evaluation (pink esthetic score [PES]) after at least 1 year of function compared with implants receiving a final abutment at the time of implant placement (DA group). Results: Fourteen articles (535 patients with 994 implants) were selected for qualitative analysis. Six of these were included in the meta-analysis. Five prostheses failed in the PA group and 1 failed in the DA group (P =.1047). Seven biologic complications occurred in the PA group and 6 occurred in the DA group (P =.8121). MBL was significantly less in the DA group (difference, 0.279 mm; P =.000). Greater buccal recession occurred in the PA group (difference, 0.198 mm; P =.0004). The PES evaluation showed no differences between groups (P =.289). Conclusions: Repeated abutment disconnections and reconnections considerably increased MBL and buccal recession. Further studies are needed to confirm these results. (C) 2017 American Association of Oral and Maxillofacial Surgeons
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