Limited marginal bone loss in implant‐supported fixed full‐arch rehabilitations after 5 years of follow‐up

Abstract

The aim of the present study was to evaluate the 5-year results in terms of marginal bone level (MBL) around implants supporting fixed full-arch metal-ceramic restorations in a series of cases of patients who had lost their teeth in that dental arch because of severe periodontal disease. Material and Methods: A retrospective cohort study was designed to evaluate the 5-year MBL results of OsseoSpeed™ Astra Tech TX implants with internal tapered conical connection. Age, gender, bone substratum, smoking habits, history of periodontitis, and prosthetic features were recorded. Mixed linear model was used to determine the influence of the different variables on MBL. Results: In this series, a total of 160 implants placed in 19 patients were evaluated. No implant failure was reported during the 5 years of follow-up. Only 14 (8.75%) implants had more than 2 mm of MBL. Abutment height, F(3,142) = 6.917, p < .001, and implant diameter, F(1,141) = 15.059, p < .001, were determined to be statistically associated with MBL. No other effect was significant. Pairwise comparisons showed that MBL was larger for abutment height = 1 (MBL = −0.987, SE = 0.186) compared with the remaining heights [−0.335 (0.171), −0.169 (0.192) and −0.247 (0.267), 2, 4 and 6 mm, respectively]. MBL was larger for narrow (−0.510, SE = 0.169) than for wide implants (−0.364, SE = 0.190). Conclusion:The current study demonstrates that the vast majority of internal conical connection implants supporting fixed full-arch metal-ceramic restorations do not suffer from relevant MBL after 5 years in function. Particularly, those implants with transmucosal abutments longer than 2 mm show less than 0.5 mm from the implant shoulder to the marginal bone.

Effect of Different Dental Implant Prosthetic Joints on Marginal Bone Loss: Emerging Findings from a Bayesian Network Meta-Analysis (NMA) and Systematic Review

“…A total of eight different prosthetic joint connections have been considered: internal hexagonal joint 1 mm below the bone level position [19][20][21][22][23][24][25][26][27], internal hexagonal joint at bone level position [19], external hexagonal joint at bone level position [23,25,26,[28][29][30][31], Internal conical prosthetic joint with index [19,22,27,28,[31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46], cone morse 1 mm below the bone level position [23][24][25][26]30,[47][48][49], cone morse at the bone level position [49], 1). A total of eight different prosthetic joint connections have been considered: interna...…”

The Influence of History of Severe Periodontitis on Estimated Long-Term Marginal Bone Loss around Implants Restored with Fixed Segmented Full-Arch Rehabilitation

“…For the current analysis, the follow-up period since implant placement and loading was not limited so that all data were analyzed. The MBL analysis after 5 years of loading in 19 fully edentulous patients in the maxilla, the mandible or both restored with 160 implants supporting fixed implant-supported full-arch segmented rehabilitation has been previously reported [26].…”

“…Images were then exported as DICOM files and evaluated in the ImageJ software (NIH, Bethesda, MD, USA). Before any study images were evaluated, as explained in a previous study [26], an intra-examiner calibration exercise was conducted for a single independent calibrated examiner (M.P.-M.). The calculated intraclass correlation coefficient was 0.892.…”