目的 采用锥形束CT(CBCT)评估缺牙区骨密度与骨吸收程度的关系,为种植术前评估提供参考。方法 选择2020-11至2021-11就诊于解放军总医院第三医学中心口腔科的460例牙列缺损患者,拍摄CBCT后根据牙槽骨吸收程度将所有患者分为无牙槽骨吸收组、Ⅰ度牙槽骨吸收组、Ⅱ度牙槽骨吸收组和Ⅲ度牙槽骨吸收组,分别测量各组前牙、前磨牙和磨牙缺牙区的平均骨密度数值并进行比较。结果 对于前牙、前磨牙区,四组之间骨密度值差异具有统计学意义(P＜0.05),且牙槽骨吸收程度与骨密度相关(r=-0.42,r=-0.37;P＜0.01);磨牙缺牙区四组骨密度无统计学差异。在前牙区,41～60岁组的骨密度和年龄呈负相关(r＝-0.31,P＜0.05);在前磨牙区和磨牙缺牙区,年龄、性别与骨密度均不相关(P＞0.05)。结论 除Ⅲ度骨吸收外,前牙和前磨牙缺牙区骨密度随牙槽骨吸收程度增加而减少。
Abstract
Objective To evaluate the relationship between bone density and bone resorption degree in the tooth-removal area using cone-beam computed tomography (CBCT), and to provide effective basis for clinical implant preoperation evaluation. Methods A total of 460 patients with missing teeth who were admitted to the Department of Stomatology, the Third Medical Center of PLA General Hospital from November 2020 to November 2021 were selected. After CBCT imaging, all patients were divided into groups no alveolar bone resorption group, degree Ⅰ alveolar bone resorption group, degree Ⅱ alveolar bone resorption group and degree Ⅲ alveolar bone resorption group, based on the degree of alveolar bone resorption. The average bone density values of the anterior teeth, premolars and molars of each group were measured and statistically analyzed. Results For the anterior teeth and premolars, there were significant differences in bone density values among the four groups (P<0.05), and the degree of alveolar bone resorption was correlated with bone density (r=-0.42, r=-0.37; P＜0.01); there was no statistically significant difference in bone density in the molars. The anterior teeth area showed a significant negative correlation (r=-0.31) in the 41-60 years age group. There was no significant correlation between age and bone mineral density in the anterior molars area and molars area groups, nor was there a significant correlation between gender and bone mineral density. Conclusions Except for grade Ⅲ bone resorption, the bone density in the missing areas of anterior teeth and premolars decreases with the increase of the degree of alveolar bone resorption.
关键词
骨密度 /
牙槽骨吸收 /
水平吸收 /
年龄 /
锥形束CT
Key words
bone density /
alveolar bone resorption /
horizontal resorption /
age /
CBCT
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