Castagnola M, Testori T, Badino M
Scuola di Specializzazione in Odontostomatologia, Università di Milano.
G Ital Endod. 1991;5(1):15-7.
In this study the authors investigated a group of front teeth, extracted because of the periodontal problems, into which an access cavity have been drilled at the point shown on an x-ray between two straight lines which start at the apex and are tangent to the pulp chamber. These teeth were then horizontally sectioned at the cement-enamel junction to see how much dental substance remained compared to a control group into which a traditional opening had been made through the palatal surface. The result show a greater conservation of dentin when the direct method of opening discussed herein was used.
在本研究中，作者对一组因牙周问题而拔除的前牙进行了研究，这些牙齿在X射线上所示的位于从根尖开始并与牙髓腔相切的两条直线之间的点处钻了一个进入腔。然后在牙骨质-釉质界处对这些牙齿进行水平切片，以观察与通过腭面进行传统开口的对照组相比，剩余的牙体组织有多少。结果表明，当使用本文讨论的直接开口方法时，牙本质的保留更多。
