Effects of thread size in the implant neck area on peri-implant hard and soft tissues : an animal study

Abstract

The aim of this animal study was to examine the effects of thread size in the implant neck area on peri-implant tissues in terms of BIC and hard- and soft-tissue dimensions. Six Beagle dogs received experimental implants in the mandible 3 month after removal of premolars and first molars (P2, P3, P4 and M1). Two different types of implants were installed in each animal: Anyone microthread® as group 1, and Anyone® as group 2. Resonance frequency test, intraoral radiography, micro-CT and histomorphometry were used to evaluate peri-implant tissue after implantation periods of 4 and 8 weeks.

No remarkable complication was observed during the healing period in either group. Resonance frequency testing revealed no significant difference between groups. In radiographic evaluation, group 2 showed more bone loss than group 1. However, this difference was not statistically significant. In the micro-CT analysis, BIC and BIV values, and soft-tissue height was not significant in both groups. Histological analysis revealed no significant difference in BIC ratio, bone density, or bone loss between groups. However, soft-tissue height was significantly greater in group 2 than in group 1 (P = 0.0004).

No difference in peri-implant hard or soft tissues was observed according to thread size in the implant neck area.