慢性牙周炎基础治疗前后牙槽骨锥形束CT评价

Evaluation of alveolar bone changes in chronic periodontitis before and after initial treatment by CBCT

目的应用锥形束CT(CBCT)评价慢性牙周炎牙周基础治疗前后牙槽骨的改变。方法选择重度慢性牙周炎患者30例,对牙周基础治疗前、后上颌前磨牙牙槽骨进行临床疗效观察及拍摄CBCT片,利用CBCT随机软件测量牙槽骨高度和相对骨密度变化。结果重度慢性牙周炎基础治疗后,患者牙周袋探诊深度、附着丧失明显好转,较治疗前差异均有统计学意义(P<0.05)。牙槽骨密度升高差异有统计学意义(P<0.05),牙槽骨吸收程度变化差异无统计学意义(P>0.05)。不同阅片者之间对牙槽骨密度及牙槽骨吸收状况的测量,一致性检测结果显示组内相关系数大于0.9,差异无统计学意义。结论 CBCT可用于重度慢性牙周炎牙周基础治疗前、后牙槽骨状态的评价,定点方法具有可行性和可重复性。

Objective To evaluate alveolar bone changes in chronic periodontitis before and after treatment by CBCT. Methods Thirty patients with chronic periodontitis were selected and received initial treatment. The outcomes were evaluated clinically and by CBCT before and after treatment. The CBCT images were analyzed using the software of Newtom CBCT. The density of the alveolar bone in maxillary premolars area was measured and recorded. The data was statistically analyzed. Results The probing depth and attachment loss improved after treatment. The alveolar bone density was significantly increased after treatment （P 〈 0. 05）, and no significant Change of alveolar bone resorption was observed before and after treatment （ P 〉 0. 05 ）. Conclusion CBCT could be used in evaluation of alveolar bone changes in chronic periodontitis. The methods of landmark identification was consistent and reproducible.