Umweni A A, Osunbor G E N
Department of Preventive Dentistry, University of Benin-P.M.B. 1154-Benin City-Nigeria.
Odontostomatol Trop. 2002 Sep;25(99):43-8.
The present study was carried out to ascertain frequency of multiple supernumerary teeth not associated with syndrome in Nigerians. A total of 13 patients comprising of 10 males (76.92%) and 3 female (23.07%) representing 0.098% of the study population had multiple supernumerary teeth. Multiple supernumerary teeth without any associated systemic diseases or syndrome are rare as reported by BLUMENTHAL (3) RUHLMAN and NEELY (17), KANTOR et al. (10) is not the case in this study. The maxillary region has the highest frequency of occurrence with 12 times (66.67%) followed by the mandibular premolar region with 4 times (22.22%) while maxillary premolar and mandibular anterior region shared (5.55%) respectively. The conical and tuberculate types of supernumerary teeth were found in the midline region, while the supplemental supernumerary teeth were more in the mandibular premolar region with 12 (70.58%) follow by maxillary midline 4 (23.52%) and the lower incisor region 1 (5.88%) which is in consonant with WINTER and BROOK (2), STAFNE (19) NAZIF, FUTALO ZULLO (15). The role of genetics in the aetiology of multiple supernumerary teeth as found in this study, the occurrence of supernumerary teeth on two brothers and a daughter to one of the affected brothers, tends, to suggest an autosomal dominant mode of inheritance and the challenges to management by the orthodontists are discussed.
本研究旨在确定尼日利亚人非综合征性多生牙的发生率。在研究人群中，共有13例患者有多生牙，其中男性10例（76.92%），女性3例（23.07%），占研究人群的0.098%。如BLUMENTHAL（3）、RUHLMAN和NEELY（17）、KANTOR等人（10）所报道，无任何相关系统性疾病或综合征的多生牙很罕见，但本研究并非如此。上颌区域的发生率最高，为12次（66.67%），其次是下颌前磨牙区域，为4次（22.22%），而上颌前磨牙和下颌前部区域分别占5.55%。锥形和结节状多生牙见于中线区域，而补充性多生牙在下颌前磨牙区域较多，有12颗（70.58%），其次是上颌中线4颗（23.52%）和下颌切牙区域1颗（5.88%），这与WINTER和BROOK（2）、STAFNE（19）、NAZIF、FUTALO ZULLO（15）的研究结果一致。本研究发现，遗传学在多生牙病因学中的作用，即两个兄弟以及其中一个患病兄弟的女儿出现多生牙，倾向于提示常染色体显性遗传模式，并讨论了正畸医生在治疗中面临的挑战。
