Alveolar Bone Deficiency Assessments Of Pre-implant Sites Using Cone Beam Ct

Objective:To investigate the bone deficiency of oral pre-implant sites using cone beam CT and Iviewer software to provide references to the safe and stable placement of oral implants Methods:56 patients'alveolar bone were scanned by cone beam CT,scanned images were reconstructed by Iviewer software.The height,width and density of 100 designed pre-implant sites were measured.The data was analyzed by SPSS11.0 software and Mann-Whitney U test.We analysed the relationship between bone quality and age. Results:1.The anterior mandible mean bone density was132.68±15.87>posterior mandible120.43±13.76> anterior maxilla107.67±14.34>posterior maxilla90.55±14.55. 2.The alveolar bone density was decreased according to age increasing 3. The lack of bone width in ineisor region increase the failure rate of dental implantation . The lack of bone height in posterior region increase the failure rate of dental implantation. Conclusion:Anterior mandible has the highest mean bone density and posterior maxilla has the lowest mean bone density. The alveolar bone density is decreased according to age increasing. Cone beam CT is a useful tool for determining the bone density,it is important for preoperative design and postoperative assessment.