Long-term effect of implant-abutment connection type on marginal bone loss and survival of dental implants
Young-Min Kim, Jong‐Bin Lee, Heung‐Sik Um, Beom-Seok Chang, Jae‐Kwan Lee
Abstract
PURPOSE: This study aimed to compare the long-term survival rate and peri-implant marginal bone loss between different types of dental implant-abutment connections. METHODS: Implants with external or internal abutment connections, which were fitted at Gangneung-Wonju National University Dental Hospital from November 2011 to December 2015 and followed up for >5 years, were retrospectively investigated. Cumulative survival rates were evaluated for >5 years, and peri-implant marginal bone loss was evaluated at 1- and 5-year follow-up examinations after functional loading. RESULTS: =0.027) with less marginal bone loss. CONCLUSIONS: There was no significant difference in the cumulative survival rate between implants with external and internal abutment connections. After 1 year of loading, marginal bone loss was greater around the implants with an external abutment connection. However, no significant difference between the external and internal connection groups was found after 5 years. Both types of abutment connections are viable treatment options for the reconstruction of partially edentulous ridges.