Investigating the Relation between the Presence of Buccal Plate Fenestration and Dehiscence around the Anterior Implants and lveolar Bone Thickness Using Cone-Beam Computed Tomography
Author(s): Mahsima Tayefi Nasrabadi, Yaser Safi, Zahra Vasegh, Reza Amid
Abstract
For long-term success of implant treatment, the characteristics of alveolar bone are important to provide proper osteointegration and maintaining bone support of the implant. Buccal bone defects around the implant endanger the stability and success of implant treatment by deranging the biomechanical balance of supporting tissues, and also increasing the probability of deep pockets. This study aims to investigate the relation between the presence of buccal bone fenestration and dehiscence in the anterior implants and thickness of alveolar bone using Cone-beam Computed Tomography (CBCT) images. In 22 patients referring to Maxillofacial Radiology Department of Shahid Beheshti, Dental School, 71 anterior implants were studied. The presence of buccal bone defect was recorded and thickness of alveolar bone in CBCT images was measured in three levels. The relation between CBCT findings were investigated by Kruskal-Wallis and Mann-Whitney statistical analysis. The prevalence of buccal bone dehiscence was 19.7% and the prevalence of buccal bone fenestration was 7%. The mean of alveolar bone thickness was 5.58 ± 1.31 mm at the platform level, at 3 mm apical to platform it was 5.95 ± 1. 57 mm and at 6 mm apical to platform it was 6.99 ± 1.45 mm. A significant relation was observed between the lower thickness of alveolar bone at 3 and 6 mm apical to platform levels and higher prevalence of dehiscence (P=0.00). There was also a similar relation between the thickness of alveolar bone at 6 mm apical to platform and the presence of fenestration (P=0.445). About 27% of anterior implants had surface bone defects and the possibility of these defects was higher in the lower thickness of the alveolar bone.
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