J Periodontal Implant Sci.  2024 Feb;54(1):53-62. 10.5051/jpis.2203240162.

The cumulative survival rate of dental implants with micro-threads: a long-term retrospective study

• Nam DH
• Kim PJ
• Koo KT
• Seol YJ
• Lee YM
• Ku Y
• Rhyu IC
• Kim S
• Cho YD

• KMID: 2557151
• DOI: http://doi.org/10.5051/jpis.2203240162

Abstract

Purpose
This study aimed to evaluate the long-term cumulative survival rate (CSR) of dental implants with micro-threads in the neck over a 10-year follow-up period and to examine the factors influencing the survival rate of dental implants.
Methods
This retrospective study was based on radiographic and dental records. In total, 151 patients received 490 Oneplant ® dental implants with an implant neck micro-thread design during 2006–2010 in the Department of Periodontology of Seoul National University Dental Hospital. Implant survival was evaluated using Kaplan–Meier analysis. Cox proportional hazard regression analysis was used to identify the factors influencing implant failure.
Results
Ten out of 490 implants (2.04%) failed due to fixture fracture. The CSR of the implants was 97.9%, and no significant difference was observed in the CSR between externaland internal-implant types (98.2% and 97.6%, respectively,P=0.670). In Cox regression analysis, 2-stage surgery significantly increased the risk of implant failure (hazard ratio: 4.769, P=0.039). There were no significant differences in influencing factors, including sex, age, implant diameter, length, fixture type, location, surgical procedure, bone grafting, and restoration type.
Conclusions
Within the limitations of this retrospective study, the micro-thread design of the implant neck was found to be favorable for implant survival, with stable clinical outcomes.

Keyword

Dental implant; Osseointegration