One abutment one time vs repeatable abutment disconnections in implants, restored with cemented / screw retained fixed partial dentures: Marginal bone level changes. A systematic review and meta-analysis
Purpose: The aim of this systematic review and meta-analysis is to evaluate the impact of abutment disconnections / reconnections on peri-implant marginal bone loss changes in partially edentulous patients.
Methods: Clinical studies were selected via electronic and hand searches in English language journals until January 1, 2020. Only randomized clinical trials (RCGTs) and prospective controlled clinical trials (CCTs) showing direct comparison between the definitive implant abutments and multiple abutment replacements in the same patient or different patient groups in the partially edentulous patients were considered. The outcome measures were (1) the type of the abutment was used, (2) the time the abutment was placed, (3) marginal bone loss changes, (4) biological complications, (5) mechanical complications.
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