DOI: 10.11607/jomi.10141Language: EnglishChacun, Doriane / Laforest, Laurent / Langlois-Jacques, Carole / Dard, Michel / Gritsch, Kerstin / Grosgogeat, Brigitte
Purpose: The aim of this multi-center cohort study in private practices was to retrospectively determine the Cumulative Survival Rate (CSR) and the marginal bone level change (ΔMBL) around novel hybrid design Tissue-Level (TL) dental implants supporting multiple screw-retained restorations. These implants feature a platform-switched transgingival region at the crestal margin designed to support marginal bone stability and implant survival. Materials and Methods: Implant CSRs were analyzed at implant and patient level using Kaplan-Meier. ΔMBL was measured by comparison of peri-apical radiographs available both at loading and at a follow-up visit with an improved standardized digital methodology based on image gray levels. ΔMBL outcomes were subject to linear mixed regression to identify potential risk factors. Results: A total of 301 TL implants in 69 patients with an average age of 62.6 ± 11.7 years (36-87 years) at the time of implantation were considered for the analysis. All 301 implants were successfully restored and loaded. The 54-month CSRs at the implant and patient levels were 98.9% 95%CI=[96.7;99.6] and 95.3% 95%CI=[86.1;98.5], respectively. ΔMBL after a mean follow-up of 22 ± 10.7 months after loading was 0.00 mm ± 0.57 mm. None of the implant sites showed a marginal bone loss exceeding 1.5 mm. Multivariate regression analysis revealed a significant association between ΔMBL and the loading protocol (p=0.027), but not between ΔMBL and age or transgingival height. Conclusions: The high cumulative survival rates and stable peri-implant marginal bone levels support the use of recent TL implants, with a hybrid design inherited from bone level implant-abutment connection, as a suitable treatment option for restoring partially or fully edentulous patients with a good mid-term prognosis. These results should be complemented by future prospective studies also in a real-world multi-center setup in private practices representing the daily realities of implant treatment.
Keywords: dental implants, retrospective study, cumulative survival rate, marginal bone level, real-world evidence, hybrid design
