PDF(Pubmed)
Abstract：
BACKGROUND: Cleidocranial dysplasia (CCD) is an autosomal dominant hereditary disorder. Besides skeletal abnormalities, CCD is often associated with dental complications, such as multiple supernumerary teeth and permanent teeth impaction or delayed eruption.
METHODS: Supernumerary teeth of axial, sagittal and coronal CBCT view was characterized in detail and 3D image reconstruction was performed. Number and location of teeth, morphology of supernumerary teeth, positional relationship between supernumerary and adjacent permanent teeth, direction of supernumerary teeth in CCD patients were analyzed.
RESULTS: The mean age of the 3 CCD patients in this study was 16.7 years. Among 36 supernumerary teeth, the majority of them were identified as apical side located and lingual side located. Normal orientation was the most common type in this study, followed by sagittal orientation, and horizontal orientation. Horizontal orientation teeth were all distributed in the mandible. Supernumerary teeth exhibited significantly shorter crown and dental-root lengths, as well as smaller crown mesiodistal and buccolingual diameters (P < 0.01). There was no difference in the number of supernumerary teeth between the maxilla and mandible, and the premolars region had the largest number of supernumerary teeth and the incisor region had the smallest number.
CONCLUSIONS: This study compares number and location of teeth, morphology of supernumerary teeth, positional relationship between supernumerary and adjacent permanent teeth and direction of supernumerary teeth, this study also provides a reference for the comprehensive evaluation of CCD patients before surgery.
METHODS: Supernumerary teeth of axial, sagittal and coronal CBCT view was characterized in detail and 3D image reconstruction was performed. Number and location of teeth, morphology of supernumerary teeth, positional relationship between supernumerary and adjacent permanent teeth, direction of supernumerary teeth in CCD patients were analyzed.
RESULTS: The mean age of the 3 CCD patients in this study was 16.7 years. Among 36 supernumerary teeth, the majority of them were identified as apical side located and lingual side located. Normal orientation was the most common type in this study, followed by sagittal orientation, and horizontal orientation. Horizontal orientation teeth were all distributed in the mandible. Supernumerary teeth exhibited significantly shorter crown and dental-root lengths, as well as smaller crown mesiodistal and buccolingual diameters (P < 0.01). There was no difference in the number of supernumerary teeth between the maxilla and mandible, and the premolars region had the largest number of supernumerary teeth and the incisor region had the smallest number.
CONCLUSIONS: This study compares number and location of teeth, morphology of supernumerary teeth, positional relationship between supernumerary and adjacent permanent teeth and direction of supernumerary teeth, this study also provides a reference for the comprehensive evaluation of CCD patients before surgery.
摘要：
背景：锁骨发育不良（CCD）是一种常染色体显性遗传性疾病。除了骨骼异常,CCD通常与牙科并发症有关，如多颗多余的牙齿和恒牙嵌塞或延迟萌出。
方法：轴向的多余齿，详细表征矢状和冠状CBCT视图，并进行3D图像重建。牙齿的数量和位置，多余牙齿的形态，多余和相邻恒牙之间的位置关系，分析了CCD患者多生牙的方向。
结果：本研究中3名CCD患者的平均年龄为16.7岁。在36颗多余的牙齿中，他们中的大多数被确定为位于顶端和舌侧。正常取向是本研究中最常见的类型，然后是矢状方向,和水平方向。水平定向牙齿均分布在下颌骨中。多余的牙齿表现出明显较短的牙冠和牙根长度，以及较小的冠中端和颊舌径（P<0.01）。上颌骨和下颌骨之间的多余牙齿数量没有差异，前磨牙区的多生牙数量最多，门牙区的多生牙数量最少。
结论：这项研究比较了牙齿的数量和位置，多余牙齿的形态，多余和相邻恒牙之间的位置关系以及多余牙齿的方向，本研究也为CCD患者术前综合评价提供了参考。
方法：轴向的多余齿，详细表征矢状和冠状CBCT视图，并进行3D图像重建。牙齿的数量和位置，多余牙齿的形态，多余和相邻恒牙之间的位置关系，分析了CCD患者多生牙的方向。
结果：本研究中3名CCD患者的平均年龄为16.7岁。在36颗多余的牙齿中，他们中的大多数被确定为位于顶端和舌侧。正常取向是本研究中最常见的类型，然后是矢状方向,和水平方向。水平定向牙齿均分布在下颌骨中。多余的牙齿表现出明显较短的牙冠和牙根长度，以及较小的冠中端和颊舌径（P<0.01）。上颌骨和下颌骨之间的多余牙齿数量没有差异，前磨牙区的多生牙数量最多，门牙区的多生牙数量最少。
结论：这项研究比较了牙齿的数量和位置，多余牙齿的形态，多余和相邻恒牙之间的位置关系以及多余牙齿的方向，本研究也为CCD患者术前综合评价提供了参考。
