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锥形束CT测量分析预种植区颌骨质量
Alveolar Bone Deficiency Assessments of Pre-implant Sites Using Cone Beam CT
【作者】 张真；
【导师】 林兆全；
【作者基本信息】 新疆医科大学 ， 口腔临床医学， 2010， 硕士
【摘要】 目的:应用锥形束CT对预种植区牙槽骨相对骨密度及骨量进行测量分析,为临床安全、稳定地植入种植体提供参考依据。方法:对56例拟种植患者利用日本公司3D,multi-Image Morita Micro CT,对患者缺牙区进行扫描,扫描图像运用Iviewer专业软件进行重建,对100个预种植位点骨密度及骨量进行测量。利用SPSS11.0软件对数据进行统计分析,Mann-Whitney U检验比较不同区域骨密度的差异,并分析骨密度、骨量与种植区域及年龄的关系。结果:1.下前牙区平均相对骨密度值最大,为(132.68±15.87),其次为下后牙区(120.43±13.76),上前牙区(107.67±14.34),骨密度值最小为后上牙区(90.55±14.55),缺牙区域的骨密度比较,差异有统计学意义(P<0.05)。2.随年龄增长,骨密度值逐渐下降。3.前牙缺失后多表现为牙槽骨宽度不足,后牙多为牙槽骨高度不足。结论:所有预种植区域中,前下牙区平均骨密度值最大,后上牙区平均骨密度值最小,随年龄增长,颌骨密度逐渐下降。锥形束CT可以提供种植区骨密度、骨量的信息,对种植的术前设计和术后评估有重要意义。
【Abstract】 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.