国际口腔医学杂志 ›› 2019, Vol. 46 ›› Issue (6): 640-649.doi: 10.7518/gjkq.2019105
摘要: 目的 研究岭南地区广府民系人群下颌第二恒磨牙的牙根和根管形态。 方法 收集广府民系患者815份锥形束CT(CBCT)影像学资料共1 279颗下颌第二恒磨牙,观察和统计牙根和根管形态,并与近年的国内外同类研究进行比较和分析。 结果 下颌第二恒磨牙双根型占57.16%、C形根型占32.84%、锥形融合根型占9.77%、三根型占0.23%,其中双根型检出率男性高于女性(P<0.05),C形根型检出率女性高于男性(P<0.05),女性中不同年龄段的双根型和C形根型检出率差异均有统计学意义(P<0.01);双根型的近中根的根管形态主要为Ⅳ型(2-2)38.58%、Ⅱ型(2-1)28.73%和Ⅰ型(1-1)22.98%,其中Ⅰ型(1-1)根管检出率女性明显高于男性(P<0.01),Ⅳ型(2-2)根管检出率男性明显高于女性(P<0.01),双根型的远中根以Ⅰ型(1-1)根管为主,占81.67%,近中根和远中根各个根管形态检出率的差异有统计学意义(P<0.01);C形根管检出率女性高于男性(P<0.05),各种根管形态检出率在根管不同部位的差异有统计学意义(P<0.01);锥形融合根型的C形根管型62.40%、多根管型20.00%、单根管型17.60%,其中多根管型检出率男性明显高于女性(P<0.01);双侧牙根形态对称68.10%,双侧牙根和根管形态完全对称62.93%。 结论 岭南地区广府民系人群下颌第二恒磨牙牙根及根管形态复杂多样,与国内外其他地区和种族有一定差异性。
中图分类号:
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