Hülsmann M, Lorch V, Franz B
Zentrum Zahn-, Mund- und Kieferheilkunde der Universität Göttingen.
Dtsch Zahnarztl Z. 1991 Apr;46(4):296-9.
Incidence, distribution and quality of endodontic treatment were investigated using panoramic radiographs of 200 patients of the Department of Periodontology. The results were compared to those of similar epidemiological investigations published in the recent literature. 3.2% of all teeth showed to be root-canal-fillings, which is less than in any other investigation. 87% of all root-canal-fillings ended more than 2 mm from the apex and more than 60% exhibited insufficient obturation. Periapical lesions were detected in 60% of all root-canal-fillings teeth.
利用牙周病科200例患者的全景X线片，对根管治疗的发病率、分布情况及质量进行了调查。将结果与近期文献中发表的类似流行病学调查结果进行了比较。所有牙齿中3.2%显示为根管充填，这一比例低于其他任何调查。所有根管充填物中，87%的充填末端距离根尖超过2mm，60%以上存在充填不充分的情况。在所有根管充填牙齿中，60%检测到根尖周病变。
