Bone Block Augmentation - A Long Term Follow-Up

Abstract

Introduction Autogenous bone block grafting is used for both vertical and horizontal augmentation of the upper and lower jaw. The bone block could be provided using extraoral or intraoral donor location. Aim The aim of this study was to observe the survival rate, the marginal bone level and the bleeding on probing (BOP) for a period of 4 to 6 years of implants, inserted in autogenous bone block graft. Materials and Methods We considered advanced horizontal bone loss, where guided bone regeneration with simultaneous implant placement could not be performed and/or vertical bone loss, where vertical augmentation of the alveolar  bone of more than 3 to 6 mm is required,  as indications for the bone block grafting procedure. As an intraoral donor site was used the mental area. Results and Discussion  The mean observation period was 4.81 years. The mean marginal bone loss was 0.442 mm, as bone resorption was established in 48% of all cases, BOP was observed in 17.7 % of the cases. No correlation was found between BOP and bone loss. The survival rate of the implants placed into bone augmented using autogenous bone block graft was 98.7 %. Conclusion For an implant placement we considered a period of 4 months after the procedure enough to provide high survival rate of the implants. The implants placed in bone augmented using autogenous bone block grafting according to our methodology demonstrated high survival rate and unstable marginal bone level.