The endodontic access cavity is an essential component of the endodontic triad upon which all subsequent canal preparation and filling is based. It is probably the most frequently underemphasized aspect of endodontic therapy. This results in great clinical frustration and poor immediate and long-term results for the practitioner. The access cavity must provide clear and unobstructed access to each and every orifice and must be designed in such a way so as not to interfere with the often difficult intracanal procedures to follow. An understanding of root development, chamber, and canal anatomy will allow the practitioner to more easily debride and seal each canal through proper access cavity preparation.
牙髓治疗入口洞形是牙髓治疗三联征的重要组成部分，所有后续的根管预备和充填都基于此。它可能是牙髓治疗中最常被忽视的方面。这给从业者带来了极大的临床困扰，并导致近期和长期治疗效果不佳。入口洞形必须提供清晰无阻的通道，通向每个根管口，其设计方式不应干扰随后通常难度较大的根管内操作。了解牙根发育、髓腔和根管解剖结构，将有助于从业者通过正确制备入口洞形，更轻松地清理和封闭每个根管。
