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安氏III类错颌中切牙代偿与骨骼差异有关吗?一项回顾性头影测量研究。

Is Incisor Compensation Related to Skeletal Discrepancies in Skeletal Class III? A Retrospective Cephalometric Study.

作者信息

Mathapun Jirath, Charoemratrote Chairat

机构信息

Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai 90110, Thailand.

出版信息

Diagnostics (Basel). 2024 May 15;14(10):1021. doi: 10.3390/diagnostics14101021.

Abstract

This study investigated compensation in skeletal Class III subjects to compare various severities of abnormal jaws. A retrospective analysis of 137 skeletal Class III cephalograms (63 males and 74 females) was conducted, with cephalometric assessments determining skeletal and dental values. The results were compared with Class I cephalograms. Incisor compensation was examined by pairing normal jaws with varied abnormal jaws, classified by severity using one standard deviation (SD). Statistical analyses included Kruskal-Wallis tests, Bonferroni tests, Spearman's correlations, and multiple linear regression. Four skeletal Class III groups were identified: OMx+PMd, RMx+OMd, OMx+OMd, and PMx+PMd (P = prognathic; O = orthognathic; R = retrognathic; Mx = maxilla; Md = mandible.). The upper central incisor (U1) showed proclination, and the lower central incisor (L1) showed retroclination across all groups except for U1 in PMx+PMd and L1 in OMx+OMd, which exhibited normal inclination. U1 exhibited limited compensation even with progressive maxillary retrognathism, while L1 showed limited compensation after one SD of mandibular prognathism. Maxilla (SNA) and jaw discrepancy (ANB) were inversely related to the U1 degree, whereas only jaw discrepancy (ANB) was positively related to the L1 degree. U1 in PMx+PMd and L1 in OMx+OMd showed no incisor compensation. U1 had limited compensation even with progressive maxillary retrognathism while L1 showed limited compensation after one SD mandibular prognathism.

摘要

本研究调查了骨性Ⅲ类患者的代偿情况,以比较不同严重程度的异常颌骨。对137例骨性Ⅲ类头颅侧位片(63例男性和74例女性)进行了回顾性分析,通过头影测量评估确定骨骼和牙齿值。将结果与Ⅰ类头颅侧位片进行比较。通过将正常颌骨与不同的异常颌骨配对来检查切牙代偿情况,异常颌骨按严重程度使用一个标准差(SD)进行分类。统计分析包括Kruskal-Wallis检验、Bonferroni检验、Spearman相关性分析和多元线性回归。确定了四个骨性Ⅲ类组:OMx+PMd、RMx+OMd、OMx+OMd和PMx+PMd(P=前突;O=正颌;R=后缩;Mx=上颌骨;Md=下颌骨)。除PMx+PMd组的上中切牙(U1)和OMx+OMd组的下中切牙(L1)表现为正常倾斜外,所有组的上中切牙均表现为前倾,下中切牙均表现为后倾。即使上颌骨逐渐后缩,U1的代偿也有限,而下颌骨前突一个标准差后,L1的代偿也有限。上颌骨(SNA)和颌骨差异(ANB)与U1角度呈负相关,而仅颌骨差异(ANB)与L1角度呈正相关。PMx+PMd组的U1和OMx+OMd组的L1未表现出切牙代偿。即使上颌骨逐渐后缩,U1的代偿也有限,而下颌骨前突一个标准差后,L1的代偿也有限。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6f2/11119506/b559467c38e3/diagnostics-14-01021-g001.jpg

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