Kan Wayne Y W, Seow W Kim, Holcombe Trevor
Logan-Beaudesert Division, Metro South Health Service District, Queensland Health, Queensland, Australia.
Pediatr Dent. 2010 Mar-Apr;32(2):134-40.
The aim of the present investigation was to compare the prevalence of taurodontism in the permanent mandibular first molars of nonsyndromic children with hypodontia and supernumerary teeth with age- and gender-matched controls.
The crown-body root ratios of the permanent first molars were determined from orthopantomograms of 83 children with hypodontia (> or =1 missing teeth) and 37 children with supernumerary teeth (> or =1 extra teeth) compared with normal case controls.
In children with hypodontia, only girls showed a significantly higher tendency for taurodontism compared to case controls (P=.003), while boys with hypodontia showed a similar prevalence of taurodontism as controls (P=.83). Children with multiple missing teeth were significantly more susceptible to taurodontism than children with a single missing tooth (P=.004). By contrast, the prevalence of taurodontism in children with supernumerary teeth was not significantly different from that of controls.
Compared to normal case controls, children with nonsyndromic hypodontia are more likely to show taurodontism of the permanent first molar teeth whereas children with nonsyndromic supernumerary teeth are not.
本研究旨在比较患有牙列缺损和多生牙的非综合征儿童与年龄和性别匹配的对照组儿童恒牙下颌第一磨牙中牛牙样牙的患病率。
从83名牙列缺损（≥1颗缺失牙）儿童和37名多生牙（≥1颗额外牙）儿童的曲面断层片中确定恒牙第一磨牙的冠根比，并与正常病例对照组进行比较。
在牙列缺损儿童中，只有女孩与病例对照组相比，牛牙样牙的患病率显著更高（P = 0.003），而牙列缺损男孩的牛牙样牙患病率与对照组相似（P = 0.83）。有多颗缺失牙的儿童比有单颗缺失牙的儿童更容易患牛牙样牙（P = 0.004）。相比之下，多生牙儿童中牛牙样牙的患病率与对照组无显著差异。
与正常病例对照组相比，非综合征性牙列缺损儿童更有可能出现恒牙第一磨牙牛牙样牙，而非综合征性多生牙儿童则不然。
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