One Abutment at One Time Concept for Platform-Switched Morse Implants: Systematic Review and Meta-Analysis

Abstract

The aim of this systematic review and meta-analysis was to compare the peri-implant vertical bone loss of immediate loading of implant crowns using the one abutment at one time (AOT) protocol and implants with abutment removal (AR). This systematic review with meta-analysis was reported according to the PRISMA statement, with guidance from the Cochrane Collaboration Handbook. A total of 103 publications were identified in the PubMed database and reference lists of examined articles. After the screening of titles and abstracts, the eligibility of eight full-text articles was assessed. Five studies published between 2010 and 2015 were included in the meta-analysis. There was less peri-implant vertical bone loss at implants using an AOT protocol than at implants using AR protocol (WMD -0.19, 95% CI -0.26 to -0.13; p<0.0001; random-effects model). In conclusion, the use of the AOT protocol with platform-switched Morse implants results in less bone loss than do AR procedures, but this effect may not be clinically relevant. The preservation of marginal bone level achieved with the AOT protocol may not enhance the aesthetics. These results should be interpreted with caution.

Clinical Evaluation of Crestal Bone Levels, Peri‐Implant Indices, and Mucosal Margin Position of Immediately Impressed Posterior Dental Implants: A Cross‐Sectional Study

“…The minimization of the number of connection/disconnections of the abutment has been suggested as a factor for decreased peri‐implant crestal bone resorption, 24,25 and can explain the nonsignificant tendency of the immediately impressed implant sites of this study to have a more coronal position of the mucosal margin. Indeed, the mean 0.22 mm more coronal position of the peri‐implant mucosal margin around immediately impressed implants in this study is approximately the same value reported in systematic reviews of comparative studies for implants treated without abutment connection/disconnections 45–47 …”

“…Therefore, dental implants are generally allowed an undisturbed 6‐week healing period before prosthesis fabrication begins, often with an analog or digital impression. In addition, for implants initially placed in a submerged position, an additional 6‐week or longer healing time is generally used to allow complete healing of the soft tissues after implant uncovering 13,42–47 . This implies that, at a minimum, prosthesis fabrication can potentially be delayed 6 or 12 weeks after implant placement, for 1‐ and 2‐stage implants, respectively.…”

One-Abutment One-Time Effect on Peri-Implant Marginal Bone: A Prospective, Controlled, Randomized, Double-Blind Study

“…Several systematic reviews recently published are unanimous about the need of standardization of comparable parameters between groups in future studies on the effect of repeated disconnection and reconnection of abutments in peri-implant marginal bone resorption [ 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 ]. Among such heterogeneity, the type of implant/implant–abutment connection, the macro design, and the location of the implant in the arch and the surgical placement protocol of the implant seems to have a greater influence on the initial bone remodeling [ 78 ].…”

A multicenter cohort study on the association of the one‐abutment one‐time concept with marginal bone loss around bone level implants

“…The main objective of this multicenter cohort study was to investigate the association of the one‐abutment one‐time concept with MBL around bone‐level implants in relation to other factors. The high number of systematic reviews that have been published on the topic may reflect the interest on maximal bone preservation by the scientific community (Atieh et al., 2017; Perrotti et al., 2019; Santos et al., 2018; Wang et al., 2017). Systematic reviews on therapeutic aspects are usually based on RCTs.…”