Schroeder H E
Zahnärztliches Institut der Universität Zürich.
Dtsch Zahnarztl Z. 1991 May;46(5):324-7.
Enamel spurs projecting from the cemento-enamel junction into the furcation as well as small islands and droplets of enamel deposited on furcational root surfaces are characteristic morphological features of human maxillary and mandibular molars. The furrows and recesses created by these structures form pathways for bacterial invasion and predispose for local periodontitis. Furthermore, the furcations are often covered by thick central cementum ridges, with steplike or tongue-like deepenings around enamel droplets. In the cementum, there is a variable number of small and large openings, representing either cementum-inherent channels or large open connections between pulp chamber and furcation. These structures offer ample opportunities for uncontrollable bacterial retention and colonisation, and the possibility for pulpal infections to spread into the furcation. The literature covering these issues is summarized.
从牙骨质-釉质界向根分叉处突出的釉质刺，以及沉积在根分叉牙根表面的小块和小滴状釉质，是人类上颌和下颌磨牙的特征性形态学特征。这些结构形成的沟和凹陷为细菌入侵提供了途径，并易引发局部牙周炎。此外，根分叉处常被厚厚的中央牙骨质嵴覆盖，釉质小滴周围有阶梯状或舌状加深。在牙骨质中，有数量不等的大小开口，代表牙骨质固有通道或髓腔与根分叉之间的大的开放连接。这些结构为细菌的不可控滞留和定植提供了充足机会，也为牙髓感染扩散到根分叉提供了可能。本文对涉及这些问题的文献进行了综述。
