夏依达·阿哈提　王梦琪　左捷　

[摘要]目的：明確混合牙列期儿童CBCT测量咬合参数与金标准石膏模型上获得的结果是否具有一致性或更具有优越性。方法：将CBCT扫描获得的数据导入MIMICS软件获得三维重建图像，同时制取超硬石膏模型。由测量人员分别进行前牙覆牙合、覆盖及第一恒磨牙咬合关系的重复测量，对比分析测量结果。结果：两种方法测量前牙覆牙合关系，测量结果符合率为81.25%，不符合率为18.75%，一致性强度为高度一致（K值=0.76）;两种方法测量前牙覆盖关系，测量结果符合率为82.03%，不符合率为17.97%，一致性强度为高度一致（K值=0.75）;两种方法测量第一恒磨牙咬合关系，左侧测量结果符合率为89.06%，不符合率为10.94%，一致性强度为最强（K值=0.81）;右侧测量结果符合率为90.63%，不符合率为9.37%，一致性强度为最强（K值=0.81）。结论：CBCT和石膏模型在测量混合牙列期儿童咬合参数具有较高的一致性，CBCT在儿童咬合诱导中具有一定的临床应用价值。

[关键词]锥形束CT;混合牙列期;咬合关系;石膏模型;咬合诱导

[中图分类号]RR782.   [文献标志码]A    [文章编号]1008-6455（2021）09-0118-04

The Feasibility Study on Cone-beam CT in Measuring Occlusal Parameters of Children with Mixed Dentition

Shayida·AHATI， WANG Meng-qi， ZUO Jie， WANG Zhi-heng， LIU Yi-shan

（Department of Stomatology，the Seventh Affiliated Hospital of Xinjiang Medical University， Urumqi 830028， Xinjiang，China）

Abstract：Objective  To clarify whether the results of CBCT analysis of occlusal parameters in mixed dentition children are consistent or superior to those obtained in gold standard plaster model. Methods The data obtained by CBCT scanning were imported into MIMICS software to obtain three-dimensional reconstruction image， and at the same time the plaster model was made.Repeated measurements of anterior overbite （occlusion）， overburden and occlusal relationship of six-year-old teeth were carried out by the surveyors， and the results were compared and analyzed. Results Two methods were used to measure the relationship between anterior overbite and occlusion. The coincidence rate was 81.25% ， the non-coincidence rate was 18.75% and the consistency intensity was highly consistent （K value 0.76）.Two methods were used to measure the relationship between anterior overburden and occlusion. The coincidence rate was 82.03% ， the non-coincidence rate was 17.97% ， and the consistency intensity was the same （K value 0.75） .Two methods were used to measure the occlusal relationship of six-year-old teeth. The results on the left side were the coincidence rate was 89.06%，the non-coincidence rate was 10.94%， the consistency intensity was the strongest （K value 0.81）.The results on the right side were the coincidence rate was 90.63% ， the non-coincidence rate was 9.37% ，and the consistency intensity was the strongest （K value was 0.81）. Conclusion  CBCT and plaster model have high consistency in the analysis of occlusal relationship in mixed dentition children. CBCT has certain clinical value.

Key words： Cone-beam computed tomography;mixed dentition;occlusal relationship;plaster model;occlusive guidance

儿童口腔科医生在临床操作中通常用石膏模型去测量相关指标以及分析咬合关系。自从儿童口腔科开展早期咬合诱导以来，它起到了很大的作用。在模型上测得的各参数指标以及咬合关系等都被认为是金标准，而且它是个很重要的临床资料获取方式[1]。即便是这样，石膏模型也存在着一些不可避免的缺点，如：在制取模型的过程中，很难获得儿童的高度配合，会引起患儿恶心呕吐，甚至心悸等不适症状。……