Medicina oral, patologia oral y cirugia bucal
Long-Term Marginal Bone Stability of BOPT Restorations on Bone-Level vs. Tissue-Level Implants: An 8-Year Prospective Clinical Study
By Navarro-Moxica MA, García-Selva M, Roig-Vanaclocha A and 5 others.
Abstract
Background
The Biologically Oriented Preparation Technique (BOPT) has been applied to implant-supported restorations to promote peri-implant tissue stability. However, long-term evidence regarding marginal bone behavior remains limited. This study evaluated marginal bone loss after eight years of functional loading in bone-level and tissue-level implants restored according to the BOPT concept, as well as the influence of prosthesis type and arch location.
Materials and methods
This prospective randomized clinical study included 122 posterior implants in 71 patients after eight years of follow-up: 57 bone-level implants and 65 tissue-level implants. All implants were restored with cement-retained metal-ceramic single crowns or fixed partial dentures. Marginal bone loss was assessed using standardized periapical radiographs obtained at prosthetic loading and after eight years. Generalized estimating equation models were used to account for multiple implants within the same patient.