At which bone level are implants explanted?

OBJECTIVES Clear guidelines when to remove an implant are missing. The aim of this study was evaluate the amount peri-implant bone loss at explantation by specialists. MATERIAL AND METHODS Implantology specialists were asked provide implants explanted due peri-implantitis with related clinical information. Early failures (survival time <12 months) analyzed separately. Questionnaires inquired age, sex, smoking, location, usage substitutes, and brand. Explants measured assessed using radiographs. Covariate-adjusted mixed-effects models evaluated for survival time. RESULTS Twelve dental offices provided 192 explants from 161 patients 99 Thirty-three (17.2%) early failures. Excluding failures, average 9.5 ± 5.8 years absolute relative 7.0 ± 2.7 mm 66.2 ± 23.7%, respectively. Late removed mean 57.7% in maxilla 73.7% mandible irrespective In fully adjusted models, only age implantation (B = -0.19; 95% CI: -0.27, -0.10) remained a significant factor Implants exhibited significantly more if they positioned (B = 17.3; 3.91, 30.72) or shorter (B = -2.79; -5.50, -0.08). CONCLUSIONS Though (66.2%) which accordance literature, its wide variation differentiation between jaws showed that profession has no universally accepted threshold beyond cannot be preserved.