对安氏II类牙列完整患者进行头影测量分析，以建立确定安氏II类无牙颌患者平面的公式：一种新辅助方法。

A cephalometric analysis of Class II dentate subjects to establish a formula to determine the occlusal plane in Class II edentate subjects: A neo adjunct.

作者信息

Sinha Nikita, Reddy K Mahendranadh, Gupta Nidhi, Shastry Y M

机构信息

Senior Lecturer, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India.

Professor, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India.

出版信息

J Indian Prosthodont Soc. 2017 Jul-Sep;17(3):226-232. doi: 10.4103/jips.jips_21_17.

DOI:10.4103/jips.jips_21_17

PMID:28936035

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5601487/

Abstract

PURPOSE

Occlusal plane (OP) differs considerably in participants with skeletal Class I and Class II participants. In this study, cephalometrics has been used to help in the determination of orientation of the OP utilizing the nonresorbable bony anatomic landmarks in skeletal Class II participants and an attempt has been made to predict and examine the OP in individuals with skeletal class II jaw relationship.

MATERIALS AND METHODS

One hundred dentulous participants with skeletal Class II malocclusion who came to the hospital for correcting their jaw relationship participated in the study. Their right lateral cephalogram was taken using standardized procedures, and all the tracings were manually done by a single trained examiner. The cephalograms which were taken for the diagnostic purpose were utilized for the study, and the patient was not exposed to any unnecessary radiation. The numerical values obtained from the cephalograms were subjected to statistical analysis. Pearson's correlation of <0.001 was considered significant, and a linear regression analysis was performed to determine a formula which would help in the determination of orientation of the OP in Class II edentulous participants.

RESULTS

Pearson's correlation coefficient and linear regression analysis were performed, and a high correlation was found between A2 and (A2 + B2)/(B2 + C2) with "" value of 0.5. A medium correlation was found between D2 and (D2 + E2)/(E2 + F2) with "" value of 0.42. The formula obtained for posterior reference frame through linear regression equation was y = 0.018* × +0.459 and the formula obtained for anterior reference frame was y1 = 0.011* × 1 + 0.497. It was hypothesized that by substituting these formulae in the cephalogram obtained from the Class II edentate individual, the OP can be obtained and verified.

CONCLUSION

It was concluded that cephalometrics can be useful in examining the orientation of OP in skeletal Class II participants.

摘要

目的

咬合平面（OP）在骨骼I类和II类参与者中存在显著差异。在本研究中，已使用头影测量法，通过骨骼II类参与者中不可吸收的骨性解剖标志来帮助确定OP的方向，并尝试预测和检查具有骨骼II类颌关系个体的OP。

材料与方法

100名因颌关系需要矫正而来医院就诊的患有骨骼II类错牙合的有牙参与者参与了本研究。使用标准化程序拍摄他们的右侧头影定位X线片，所有描图均由一名经过培训的检查者手动完成。用于诊断目的拍摄的头影定位X线片用于本研究，患者未接受任何不必要的辐射。对头影定位X线片获得的数值进行统计分析。Pearson相关性<0.001被认为具有显著性，并进行线性回归分析以确定有助于确定II类无牙参与者OP方向的公式。

结果

进行了Pearson相关系数和线性回归分析，发现A2与（A2 + B2）/（B2 + C2）之间存在高度相关性，“”值为0.5。发现D2与（D2 + E2）/（E2 + F2）之间存在中等相关性，“”值为0.42。通过线性回归方程获得的后参考框架公式为y = 0.018* × +0.459，前参考框架公式为y1 = 0.011* × 1 + 0.497。假设通过将这些公式代入从II类无牙个体获得的头影定位X线片中，可以获得并验证OP。