Influence of bone quality on success and bone level changes around platform-switched morse taper connection implants supporting fixed partial prostheses: a one-year prospective clinical study

Abstract

Evaluate the influence of bone quality on success and bone level changes around Morse taper implants with platform-switching
supporting fixed partial prostheses, within one year after implant placement. Platform-switched Morse taper connection implants with hydrophilic surfaces were placed to support metal-ceramic prostheses. Bone quality was surgically assessed by the surgeons according to their perception of resistance during implant site preparation and confirmed on periapical radiography. Implants were divided into two groups: bone type I/II and bone type III/IV. To evaluate bone level changes, periapical X-rays were obtained at screening, immediately after implant placement, 6 months, and one year after surgery (T12). Forty-nine implants, inserted in 12 patients, were assessed. Twenty-seven implants were evaluated as presenting bone type I/II and 22 implants were bone type III/IV. Implant survival and success rates were 100% for both bone types one year after surgery. Mean bone loss at T12 for the bone type I/II group was 0.93± 0.46mm and 1.00±0.58 mm for the bone type III/IV group. Within their limits, the present results suggest that platform-switched Morse taper connection implants with hydrophilic surfaces supporting fixed partial prostheses may achieve high success rates and excellent marginal bone level maintenance in poor and high-quality bone types, one year after surgery.