中文摘要：

目的 ：应用锥形束CT对拟种植区域的骨密度进行定量测量分析,探讨其在种植术前的应用价值。方法 ：利用牙科锥形束CT机,扫描43例拟种植患者缺牙区,利用examvision软件重建扫描图像,测量53个预种植位点骨密度。利用SPSS19.0软件对数据进行统计分析,并分析不同区域骨密度的差异。结果：下颌前牙区的平均骨密度值最大,为（922.71±182.41）HU;其次为上前牙区（692.37±71.55）HU、下颌后牙区（542.17±197.40）HU;上颌后牙区骨密度值最小,为（323.57±108.92）HU。缺牙区域的骨密度比较,差异有统计学意义（P〈0.05）。结论：所有预种植区域中,下前牙区平均骨密度值最大,上颌后牙区平均骨密度值最小。锥形束CT提供了种植区骨质的情况,对术前种植部位选择,植入和手术方案等提供了重要的参考信息。

英文摘要：

Objective： This study aimed to employ quantitative measurement and analysis of bone mineral density in the planting area in dental implant therapy. Methods： The missing teeth area of 43 cases implant patients were scanned by using dental cone beam CT, the scanning images were treated by examvision software to reconstruct, and 53 pre planting sites of bone density were measured. The data were statistically analyzed by SPSS19.0 software, and the differences between bone mineral density and planting area were analyzed. Results： The average bone density value in mandibular anterior teeth area was the maximum （922.71±182.41） HU, followed by anterior teeth area （692.37±71.55） HU, mandibular posterior area of （542.17±197.40） HU, the bone mineral density value in maxillary posterior region was the minimum （323.57±108.92） HU. There was significant difference in bone mineral density（P〈0.05） in the different missing teeth areas. Conclusion： In all pre-planting areas, the mandibular anterior teeth area average bone density value is the highest, while the maxillary posterior region bone mineral density value is the lowest. The lower radiation dose and more user-friendly upright position used for scanning, help CBCT to be the way forward for better dental implant treatment assessment and planning.