Timmerman M F, Van der Weijden G A
Department of Periodontology, ACTA, Amsterdam, The Netherlands.
J Clin Periodontol. 2006 Sep;33(9):620-5. doi: 10.1111/j.1600-051X.2006.00958.x. Epub 2006 Jul 20.
This retrospective study compared the marginal bone level of teeth with root canal fillings with contra-lateral teeth without.
Of 286 consecutive patients (> or =35 years), referred to practice for periodontology in the Netherlands, 67 full sets of radiographs contained > or =1 endodontically treated tooth and its contra-lateral tooth without root canal treatment. Bone level at the mesial and distal of these teeth was scored from the CEJ. In multi-rooted teeth, the presence of interradicular radiolucency was assessed. The presence of posts, and periapical radiolucencies was assessed. Analysis for differences between treated teeth and contra-laterals was controlled for tooth surface, presence of a post and tooth type.
The mean distance from the root filling to the apex was 2.6 mm. Periapical radiolucencies were found in 14%. The mean bone level was at 4.3 mm for endodontically treated teeth and at 3.7 mm for contra-laterals. Significantly more bone loss (0.6 mm) was found at the endodontically treated teeth. No difference was found between mesial and distal, teeth without and with posts and different tooth types. The presence of interradicular radiolucency was more frequent in endodontically treated teeth (OR 2.1, p(McNemar test)=0.039).
In periodontitis patients, teeth with endodontic treatment had more bone loss as compared with untreated contralaterals.
本回顾性研究比较了进行根管充填的牙齿与对侧未进行根管充填牙齿的边缘骨水平。
在荷兰连续转诊至牙周病科的286例患者（年龄≥35岁）中，67套X光片中包含≥1颗接受过根管治疗的牙齿及其未接受根管治疗的对侧牙齿。从牙骨质牙本质界对这些牙齿的近中及远中骨水平进行评分。对于多根牙，评估根分叉处透射影的存在情况。评估桩的存在情况及根尖透射影。对治疗牙齿与对侧牙齿之间的差异分析进行了牙齿表面、桩的存在情况及牙齿类型的对照。
从根管充填到根尖的平均距离为2.6毫米。14%的患者存在根尖透射影。接受根管治疗牙齿的平均骨水平为4.3毫米，对侧牙齿为3.7毫米。在接受根管治疗的牙齿处发现明显更多的骨吸收（0.6毫米）。在近中与远中、有桩与无桩牙齿以及不同牙齿类型之间未发现差异。根分叉处透射影在接受根管治疗的牙齿中更常见（比值比2.1，McNemar检验p值=0.039）。
在牙周炎患者中，接受根管治疗的牙齿与未治疗的对侧牙齿相比，骨吸收更多。
