光密度分析法在预种植下颌骨质量评估中的应用  

Application of the bone quality of pre-implanted mandible through optical density measurement

作　　者：顾亮[1] 俞立英[1] 周艺[1] 解春[1] 

机构地区：[1]复旦大学附属华山医院颌面外科,上海200040

出　　处：《上海口腔医学》2008年第5期479-482,共4页Shanghai Journal of Stomatology

摘　　要：目的:应用光密度分析软件结合曲面体层摄影,尝试量化评估预种植下颌骨质量情况,并分析该方法的有效性和可行性。方法:随机选择60例预备接受种植牙手术的患者,手术前行全颌曲面体层摄影和CT扫描。通过高精度扫描,将X线胶片保存为计算机图像格式文件。根据Lekholm和Zarb颌骨分类法,将预种植下颌骨分为3组,并选取下颌角、下颌体后份、下颌体前份和预种植区为兴趣区。应用ImagePro Plus软件测量兴趣区的平均光密度值,同时应用SimPlant软件测量相应兴趣区的CT值。对各组的预种植区光密度平均值进行Kruskal-Wallis检验和组间的多重比较,并对各兴趣区的光密度值和CT值进行直线相关分析。结果:下颌角和下颌体后份的光密度值较高;预种植区的光密度值较低。Ⅰ、Ⅱ、Ⅲ组预种植区的光密度值具有统计学差异。4个兴趣区的平均光密度值和CT值之间存在直线相关关系。结论:通过比较研究,应用光密度分析法评估预种植下颌骨质量具有一定的有效性和可行性。PURPOSE： To assess the bone quality of the pre-implanted mandible through an approach of the optical density after examination of the pantomography and analyze the feasibility. METHODS： Thirty males and 30 females who underwent the procedure of dental implantation were examined with the pantomography and CT scan before the procedure. The films were scanned into computerized bitmap flies. Four areas of interest were selected. The mandibular angle, the posterior part of the mandibular body, the anterior part of the mandibular body and the pre-implanted area. The mean optical densities of these four areas were measured with the software ImagePro Plus. The mean optical densities of the pre-implanted area of three groups underwent Kruskal-Wallis test and LSD-t test. Then the CT values of these four areas were measured with the software SimPlant after data importation. The liner correlation analysis was carried out between the mean optical densities and CT values for the four areas of interest. RESULTS： The mean optical density of the pre-implant area was lower than that of the mandibular angle and the posterior part of the mandible body. There were significant differences between the means of optical density of the pre-implanted regions of different groups. There was a liner cmxelation between the optical densities and CT values of the same areas of interest. CONCLUSIONS： The approach of optical density analysis is able to classify the different divisions of mandible and its results bear the same fidelity with the SimPlant with CT scan. This approach is effective and feasible.

关 键 词：曲面体层摄影:螺旋CT SimPlant 光密度 

分 类 号：R782.12[医药卫生—口腔医学]