Créton Marijn A, Cune Marco S, Verhoeven Willem, Meijer Gert J
Department of Oral-Maxillofacial Surgery, Prosthodontics and Special Dental Care, University Medical Center Utrecht, Utrecht, The Netherlands.
Int J Prosthodont. 2007 Jul-Aug;20(4):409-13.
The purpose of this study was to characterize a population of oligodontia patients and identify patterns of tooth agenesis.
A total of 116 patients with nonsyndromic oligodontia were studied, and the Tooth Agenesis Code (TAC) per quadrant was calculated. Oligodontia was defined as the congenital absence of 6 or more permanent teeth, excluding the third molars. The TAC is a unique number, consistent with a specific pattern of tooth agenesis. The authors suggest the use of an overall TAC with which the dentition throughout the mouth can be presented by a single number. Frequency analysis was used to study the prevalence of various patterns.
There was a great diversity of TACs. In the maxilla, agenesis of both premolars and the lateral incisor or the presence of only the central incisor and first molar were the most common patterns. In the mandible, agenesis of the second premolar or both premolars occurred most frequently.
No single pattern of agenesis occurred more than twice when the full mouth was viewed. Hence, the presentation of the dentition in oligodontia is very heterogeneous. Evaluation of treatment strategies in oligodontia patients is a methodologic challenge because homogenous, comparable subgroups of patients are not available.
本研究旨在对少牙畸形患者群体进行特征描述，并确定牙齿发育不全的模式。
共研究了116例非综合征性少牙畸形患者，并计算了每个象限的牙齿发育不全代码（TAC）。少牙畸形定义为先天性缺失6颗或更多恒牙，不包括第三磨牙。TAC是一个独特的数字，与特定的牙齿发育不全模式一致。作者建议使用一个总体TAC，通过一个数字来呈现全口牙列情况。采用频率分析来研究各种模式的患病率。
TAC存在很大差异。在上颌，前磨牙和侧切牙均缺失或仅存在中切牙和第一磨牙是最常见的模式。在下颌，第二前磨牙缺失或两颗前磨牙均缺失最为常见。
从全口来看，没有一种单一的发育不全模式出现次数超过两次。因此，少牙畸形患者的牙列表现非常多样化。由于无法获得同质、可比的患者亚组，评估少牙畸形患者的治疗策略是一项方法学挑战。
