Buchner A, Merrell P W, Hansen L S, Leider A S
Division of Oral Pathology, University of the Pacific, San Francisco, CA.
J Periodontol. 1990 Sep;61(9):585-9. doi: 10.1902/jop.1990.61.9.585.
The retrocuspid papilla (RCP) is a circumscribed nodule that lies lingual to the mandibular cuspid on the gingival tissue. RCP is observed more frequently in young children and seems to regress or disappear with age. Little information is available in the literature on this entity and there are contradictory reports regarding its histologic features. Histomorphologic analysis of 30 specimens diagnosed as RCP revealed that in most cases (80%) it is composed of loosely-arranged delicate fibrous connective tissue with stellate and multinucleated fibroblasts. Elongation of the rete ridges and/or increased vascularity are also present in a significant number of cases. Stellate and multinucleated fibroblasts are not unique to RCP and they have been described as prominent histologic features in other lesions of skin and mucous membrane. RCP is considered to be a "normal anatomical structure" or an "anatomic variation" of the gingiva. The clinical significance of RCP is that it may simulate pathological gingival conditions from which it must be differentiated.
下颌尖牙后乳头（RCP）是位于下颌尖牙舌侧牙龈组织上的一个局限性结节。RCP在幼儿中更常见，且似乎会随着年龄增长而消退或消失。关于这个实体的文献资料很少，并且关于其组织学特征存在相互矛盾的报道。对30例诊断为RCP的标本进行组织形态学分析发现，在大多数病例（80%）中，它由排列疏松的纤细纤维结缔组织组成，伴有星状和成纤维细胞。在相当数量的病例中还存在 rete 嵴延长和/或血管增多的情况。星状和成纤维细胞并非RCP所特有，它们已被描述为皮肤和黏膜其他病变的突出组织学特征。RCP被认为是牙龈的“正常解剖结构”或“解剖变异”。RCP的临床意义在于它可能模拟病理性牙龈状况，必须与之鉴别。
