Definitive abutments placed at implant insertion and never removed: is it an effective approach? A systematic review and meta-analysis of randomized controlled trials

Publication date: Available online 24 August 2017
Source:Journal of Oral and Maxillofacial Surgery
Author(s): Marco Tallarico, Martina Caneva, Silvio Mario Meloni, Erta Xhanari, Ugo Covani, Luigi Canullo
Purposeto assess whether repeated abutment dis/reconnections has any impact on peri-implant bone resorption and on soft-tissue healing.MethodsElectronic and manual searches were conducted for English articles published up to March 2017, to identify whether there is a relationship between repeated disconnections of implant abutments (PA group) and prosthetic/implant failures, complications, marginal bone loss (MBL), soft tissue healing and esthetic evaluation (PES), after at least 1 year of function, compared to implants receiving a final abutment at the time of implant placement (DA group).ResultsFourteen articles (535 patients with 994 implants) were selected in the qualitative analysis. Six of these were included in the meta-analysis. Five prosthesis failed in the PA group and one in the DA group (P=0.1047). Seven biologic complications were experienced in the PA group and six in the DA group (P=0.8121). MBL was statistically lower in the DA group (difference 0.279mm; P=0.000). Higher buccal recession was experienced in the PA group (difference 0.198mm; P=0.0004). The PES evaluation showed no differences between groups (P=0.289).ConclusionsRepeated abutment dis/reconnections significantly increased MBL and buccal recession. Further studies are needed to confirm these results.



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