Vivianne Chappuis1, Yeliz Cavusoglu2, Daniel Buser3, Thomas von Arx3. 1. Assistant Professor, Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Switzerland. 2. Research Associate, Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Switzerland. 3. Professor, Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Switzerland.
Abstract
BACKGROUND: The use of autogenous block grafts harvested from intraoral donor sites has proven to be effective for the reconstruction of horizontal bone defects. PURPOSE: The objective of this study was to analyze implant success and the rate of block graft resorption 10 years after ridge augmentation to elucidate contributing factors influencing graft maintenance. MATERIALS AND METHODS: A staged horizontal block graft augmentation was performed in 52 implant sites exhibiting severe horizontal bone atrophy using autogenous block grafts protected by DBBM and collagen membranes. The crest width was assessed intraoperatively at surgery and at re-entry after 6 months. At the 10 year reexamination clinical and radiographic parameters were assessed using cone beam computed tomography. RESULTS: The 10-year implant success rate amounted to 98.1%, with minimal peri-implant bone loss (-0.17 mm for the maxilla, -0.09 mm for the mandible). The surface resorption rate after 10 years was 7.7% (0.38 mm). Grafts originating from the chin demonstrated significantly better graft maintenance at 10 years compared to retromolar grafts. Recipient site and age had no significant impact on graft resorption, whereas females showed more bone loss at the 10-year examination. CONCLUSIONS: Lateral ridge augmentation using autogenous block grafts and guided bone regeneration demonstrated a favorable success rate of 98.1% with minimal block graft resorption of 7.7% after 10 years. Modulating factors were origin of the graft and gender.
BACKGROUND: The use of autogenous block grafts harvested from intraoral donor sites has proven to be effective for the reconstruction of horizontal bone defects. PURPOSE: The objective of this study was to analyze implant success and the rate of block graft resorption 10 years after ridge augmentation to elucidate contributing factors influencing graft maintenance. MATERIALS AND METHODS: A staged horizontal block graft augmentation was performed in 52 implant sites exhibiting severe horizontal bone atrophy using autogenous block grafts protected by DBBM and collagen membranes. The crest width was assessed intraoperatively at surgery and at re-entry after 6 months. At the 10 year reexamination clinical and radiographic parameters were assessed using cone beam computed tomography. RESULTS: The 10-year implant success rate amounted to 98.1%, with minimal peri-implant bone loss (-0.17 mm for the maxilla, -0.09 mm for the mandible). The surface resorption rate after 10 years was 7.7% (0.38 mm). Grafts originating from the chin demonstrated significantly better graft maintenance at 10 years compared to retromolar grafts. Recipient site and age had no significant impact on graft resorption, whereas females showed more bone loss at the 10-year examination. CONCLUSIONS: Lateral ridge augmentation using autogenous block grafts and guided bone regeneration demonstrated a favorable success rate of 98.1% with minimal block graft resorption of 7.7% after 10 years. Modulating factors were origin of the graft and gender.
Authors: Rene Rothweiler; Christian Gross; Emely Bortel; Sarah Früh; Javier Gerber; Elodie Boller; Jonas Wüster; Andres Stricker; Tobias Fretwurst; Gerhard Iglhaut; Susanne Nahles; Rainer Schmelzeisen; Bernhard Hesse; Katja Nelson Journal: Front Bioeng Biotechnol Date: 2022-06-17
Authors: Stefan P Bienz; Michael Payer; Jenni Hjerppe; Jürg Hüsler; Norbert Jakse; Patrick R Schmidlin; Christoph H F Hämmerle; Ronald E Jung; Daniel S Thoma Journal: Clin Oral Implants Res Date: 2021-09-28 Impact factor: 5.021