In the present study, CAMLOG SCREW-LINE implants with the Promote plus surface (sandblasted and acid-etched surface) were used. These implants in combination with platform-matching abutments have been shown to have high long-term success rates ranging from 97.8 to 100% at 5-year to 10-year follow-up [9,10,11,12,13]. They can be restored with either platform-matching or platform-switching abutments with the difference that platform-switching abutments have a narrower diameter than the implant, leading to an implant-abutment mismatch. The effects of platform switching on hard tissue outcomes are well-studied, with there being a tendency to better outcomes with respect to crestal bone loss with platform switching [14,15,16,17,18,19,20,21,22,23]. Regarding the CAMLOG SCREW-LINE implants, the effect of platform switching and platform matching was evaluated in a randomized controlled clinical trial (RCT) [21, 23]. At 1-year follow-up, implant success rates were 97.3% and 100%, and at 3 years, implant survival was 97.3% and 97.1%, for platform-switching and platform-matching implants respectively. Platform-switching implants showed a positive effect on marginal bone loss already at 1-year follow-up, and significantly less marginal bone loss was reported with the platform-switching versus platform-matching technique at 3 years (0.28 ± 0.56 mm vs. 0.68 ± 0.64, respectively; p = 0.002.

To understand the performance of the CAMLOG SCREW-LINE implants used with platform-switching and platform-matching abutments outside of a controlled clinical environment, we conducted a prospective, non-interventional study in private practice. The primary objective was to provide data for a life table analysis on the performance of the implants in private practice, to show the probability of survival and success of the dental implants after a follow-up time of 5 years post-loading. Secondary objectives were to evaluate patient satisfaction through the assessment of appearance, ability to chew, ability to taste, comfort, general satisfaction, and fit. The outcomes were also reported for platform-switching and platform-matching subgroups.