Remodeling of Autogenous Bone Grafts after Osteotome Sinus Floor Elevation Assessed by Limited Cone Beam Computed Tomography

Tetsuya Nishida,Koichi Ito,Miyuki Ariji,Kyoko Mori,Kaori Nishida,Yuka Takenouchi

doi:10.1155/2013/931708

Abstract

This study assessed the radiographic appearance of bone graft domes longitudinally after osteotome sinus floor elevation using cone beam computed tomography (CBCT). This study presents the radiological findings of a 6-month follow-up CBCT study in maxillary osteotome sinus floor elevation. We examined 52 patients with a crestal bone height of less than 8 mm in the posterior maxilla who required sinus augmentation. Implants (n = 91) were subsequently placed in regenerated bone following osteotome sinus floor elevation; autogenous bone was used as the augmentation material. In all cases, the grafted augmentation material tended to be absorbed, but at least 1 mm of grafted augmentation material was recognized around the implant fixtures on CBCT at the second implant operation. The border between the grafted augmentation material and the existing bone was indistinct. The grafted area apical to the implants undergoes shrinkage and remodeling. It was suggested that sufficient grafted autogenous bone changes into bone to support an implant.

Highlights

Alveolar bone resorption of the maxillary posterior edentulous region and increased pneumatization of the sinus cavity can result in insufficient bone support for dental implants
The osteotome sinus floor elevation procedure was performed as described by Summers [16,17,18], and autogenous bone was used as the augmentation material
We examined 52 patients in the posterior maxilla who required sinus augmentation

Summary

Introduction

Alveolar bone resorption of the maxillary posterior edentulous region and increased pneumatization of the sinus cavity can result in insufficient bone support for dental implants. This problem can be overcome by grafting the maxillary sinus floor using a sinus lift procedure [1,2,3,4,5,6,7,8,9,10,11,12]. The posterior maxilla is one of the most predictably successful areas for bone grafting procedures [13]. Complications following a sinus lift procedure include maxillary sinusitis, oroantral communication, bone graft resorption, mucocele formation, maxillary cyst, and implant failure [14]

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