Shultsman M, Taicher S
Dept. of Oral and Maxillofacial Surgery, Chaim Sheba Medical Center, Tel-Hashomer.
Refuat Hapeh Vehashinayim (1993). 2003 Apr;20(2):35-7, 80.
The occurrence of supernumerary teeth is not uncommon. The preferred location of the supernumerary teeth is in the maxilla, mostly incisors, followed by the molars. Supernumerary molars are divided into two types, depending on their location: distomolars and paramolars. Distomolars are supernumerary teeth that are distal to the third molars, while paramolars are supernumerary teeth on the side of the molars. The paper describes an unusual case of four distomolars. The two maxillary distomolars were unerupted, in a vertical position distal to the third molars. Their morphology was normal but they were smaller than the regular molars. The two mandibular distomolars were unerupted, in a horizontal position distal to the third molars. Their morphology was normal but they were smaller than the regular molars. Cases of four distomolars with normal morphology are extremely rare and have seldom been reported in the dental literature. The phenomenon is interesting especially considering the fact that in modern man, missing third molars are becoming a common finding.
多生牙的出现并不罕见。多生牙最常见的位置在上颌，主要是切牙，其次是磨牙。多生磨牙根据其位置可分为两种类型：远中磨牙和旁磨牙。远中磨牙是位于第三磨牙远中的多生牙，而旁磨牙是位于磨牙侧面的多生牙。本文描述了一例罕见的四颗远中磨牙病例。两颗上颌远中磨牙未萌出，垂直位于第三磨牙远中。它们的形态正常，但比正常磨牙小。两颗下颌远中磨牙未萌出，水平位于第三磨牙远中。它们的形态正常，但比正常磨牙小。四颗形态正常的远中磨牙病例极为罕见，在牙科文献中鲜有报道。考虑到在现代人中，第三磨牙缺失正变得越来越常见，这一现象尤其有趣。
