Maxillary first molar agenesis and other dental anomalies

被引:16
作者
Abe, Ryota [1 ]
Endo, Toshiya [1 ]
Shimooka, Shohachi [2 ]
机构
[1] Nippon Dent Univ, Niigata Hosp, Chuo Ku, Niigata 9518580, Japan
[2] Nippon Dent Univ, Sch Life Dent Niigata, Dept Pediat Dent, Niigata 9518580, Japan
关键词
Maxillary first molar agenesis; Third molar agenesis; Advanced tooth agenesis; Dental anomaly; TOOTH AGENESIS; MUTATION; MSX1; PAX9;
D O I
10.2319/020210-69.1
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Objective To explore the association of maxillary first molar agenesis with other dental anomalies in Japanese orthodontic patients Materials and Methods A total of 32 subjects with one or two congenitally missing maxillary first molars (group M) were selected and divided into group 1M (12 subjects with one maxillary first molar missing) and group 2M (20 subjects with two maxillary first molars missing) As controls, 32 sex-matched subjects without agenesis of maxillary first molars were collected (group C) Panoramic and periapical radiographs, cephalograms, study models, intraoral photographs, and anamnestic data were used to identify anomalies of permanent teeth Chi-square, Fisher's exact, Kruskal-Wallis, and Steel-Dwass tests were used to make statistical comparisons Results The prevalence rates of tooth agenesis other than the maxillary first molars and advanced tooth agenesis, with third molars excluded, were significantly higher in group 2M than in group C The absence of second premolars was most common The prevalence rate of third molar agenesis was significantly higher in groups 1M and 2M than in group C The occurrence of symmetrical agenesis of the mandibular third molars was particularly notable in group 2M as compared to group 1M, in which maxillary third molar agenesis was predominant There was no significant association between maxillary first molar agenesis and other dental anomalies, except for agenesis of teeth other than maxillary first molars Conclusion Agenesis of maxillary first molars is associated with a higher prevalence of other permanent tooth agenesis and advanced tooth agenesis (Angle Orthod 2010,80 1002-1009)
引用
收藏
页码:1002 / 1009
页数:8
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