Grieve A R, McAndrew R
Department of Conservative Dentistry, Dental School, University of Dundee.
Br Dent J. 1993 Mar 20;174(6):197-201. doi: 10.1038/sj.bdj.4808125.
A total of 327 post-retained crowns were examined radiographically and a number of features were assessed including the length of post, length of remaining root filling, periapical condition, fit and angulation of the post and quality of root filling. The post length was equal to or greater than that of the crown in only 34% of cases. Although the majority of posts fitted well laterally, 43% did not extend longitudinally as far as the end of the prepared post hole. Some 20% deviated from the line of the root canal but the number of actual lateral perforations was small. A total of 47% of the teeth had areas of radiolucency around the root apices. A majority of root fillings were judged to be unsatisfactory and there was no radiographic evidence of any root filling at all in nearly 10% of cases.
共对327颗桩核冠进行了影像学检查，并评估了一些特征，包括桩的长度、剩余根充物的长度、根尖周情况、桩的适配性和角度以及根充质量。仅在34%的病例中，桩的长度等于或大于冠的长度。尽管大多数桩在侧向适配良好，但43%的桩在纵向上未延伸至预备桩洞的末端。约20%的桩偏离根管方向，但实际侧穿的数量较少。共有47%的牙齿根尖周围有透射区。大多数根充被判定为不令人满意，近10%的病例根本没有根充的影像学证据。
