新疆维吾尔族成人上颌前牙区牙槽骨形态的锥形束CT研究

Value of cone beam CT to assessing alveolar bone morphology of upper anterior teeth region in Xinjiang Uygur adults

目的应用锥形束CT(cone beam CT,CBCT)研究新疆维吾尔族(维族)成年人上颌前牙区牙槽骨形态特征。方法非牙周组织病维族成年人85例(510颗上颌前牙),行CBCT检查后测量上颌前牙唇侧、腭侧牙槽骨厚度,分析上颌前牙牙根与牙槽骨矢状向位置关系。结果上颌前牙牙根矢状向位置主要为一类(占88.83%),其次为四类(占8.04%)和二类(占3.33%),未发现三类;上颌前牙唇侧根尖部牙槽骨厚度大于牙槽骨嵴顶下方2mm和根中部,且牙槽骨嵴顶下方2mm大于根中部(P<0.05);上颌前牙腭侧根尖部牙槽骨厚度大于根中部和牙槽骨嵴顶下方2mm,且根中部大于牙槽骨嵴顶下方2mm(P<0.05);上颌前牙唇侧骨嵴顶下方2mm牙槽骨厚度>1.0~1.5mm者占56.67%,≤1.0mm者占23.53%,>1.5~2.0 mm者占17.84%,>2.0 mm者占1.96%;根中部牙槽骨厚度≤1.0 mm者占66.08%,>1.0~1.5mm者占29.61%,>1.5~2.0 mm者占3.92%,>2.0 mm者占0.39%;根尖部牙槽骨厚度>2.0mm者占56.47%,>1.0~1.5mm者占20.20%,>1.5~2.0mm者占17.45%,≤1.0mm者占5.88%。结论新疆维族成年人上颌前牙牙根矢状向位置多为偏向唇侧,唇、腭侧牙槽骨骨壁厚度存在差异,唇侧牙槽骨骨壁较薄。

Objective To explore the anatomical morphology of the alveolar bone in the upper anterior teeth region of Xinjiang Uygur adults.Methods The facial and palatal alveolar bone widths of the maxillary anterior teeth were measured by CBCT in 85 Uygur adult patients with non-periodontal disease(510maxillary anterior teeth)to analyze the relationship between the maxillary anterior teeth root and the alveolar bone sagittal position.Results Maxillary anterior teeth root sagittal position was mainly in class 1(88.83%),followed by class 4(8.04%)and class 2(3.33%),and no position was in class 3.The maxillary labial bone width of the alveolar apical bone was greater than alveolar 2 mm apical to crest level and mid-root level,and alveolar 2 mm apical to crest level was greater than mid-root level(P<0.05).The maxillary palatal root apical bone width of the alveolar bone was greater than alveolar 2 mm apical to crest level,and mid-root level was greater than alveolar 2 mm apical to crest level(P<0.05).The bone width of 2 mm apical to crest level alveolar bone was> 1.0 to 1.5 mm(56.67%),followed by≤ 1.0 mm(23.53%),> 1.5 to 2.0 mm(17.84%)and>2.0mm(1.96%).The bone width in the root canal was mainly less than 1.0 mm(66.08%),followed by> 1.0 to 1.5 mm(29.61%),> 1.5 to 2.0 mm(3.92%),and >2.0 mm(0.39%).The bone width of the root tip was mainly>2.0mm(56.47%),followed by> 1.0 to 1.5 mm(20.20%),> 1.5 to 2.0 mm(17.45%),and ≤1.0 mm(5.88%).Conclusion The majority of the anterior maxillary teeth roots are positioned close to the facial cortical plate.The width differs in palatal alveolar bone of the maxillary anterior teeth.The facial alveolar bone wall is thin.