Feng Qingchen, Zhou Jiawei, Zhang Guanning, Mei Hongxiang, Su Chongying, Jiang Chen, Zhang Mei, Jiang Fulin, Liao Gongjie, Li Juan
State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, China.
Chongqing University Three Gorges Hospital, Chongqing, China.
Clin Oral Investig. 2023 Oct;27(10):5947-5955. doi: 10.1007/s00784-023-05208-7. Epub 2023 Aug 21.
This study was designed to determine the optimal anterior-posterior (AP) position of upper incisors through Anterior Nasal Spine (ANS) point.
Lateral cephalometric radiographic images of 690 patients were collected and divided into a derivation group and a validation group, and the former were subdivided into a proper AP position (PAP) group and an improper AP position (iPAP) group. The distance from facia-axis (FA) point of upper incisors to the line perpendicular to Frankfort horizontal (FH) plane through ANS (FA-ANS) was measured, and the relationship between FA-ANS and several cephalometric indices were studied through Pearson correlation analysis. Receiver operating characteristic (ROC) curves for different clinical indices were analyzed to evaluate the diagnostic efficiency of optimal AP position of upper incisors.
The average value of FA-ANS in PAP group was 0.57±1.99, which was significantly different from FA-ANS in iPAP group. Cephalometric indices such as U1-NA, U1-SN, AB-NPo, UL-TVL, Wits, and ANB were found to be correlated with FA-ANS. The receiver operating characteristic (ROC) curves represented a greater diagnostic efficiency of FA-ANS compared with other clinical indices.
ANS point, as a stable skeletal landmark, could be used to access an optimal AP position of upper incisors, providing aids to clinical diagnosis and treatment goal determination for clinical practice.
A new index FA-ANS, together with other traditional indices, could help determine the optimal position of upper incisors and provide a personalized therapeutic plan.
本研究旨在通过前鼻棘（ANS）点确定上切牙的最佳前后（AP）位置。
收集690例患者的头颅侧位X线片，分为推导组和验证组，推导组再细分为合适AP位置（PAP）组和不合适AP位置（iPAP）组。测量上切牙的面轴（FA）点到通过ANS垂直于法兰克福平面（FH）的线的距离（FA-ANS），并通过Pearson相关分析研究FA-ANS与几个头影测量指标之间的关系。分析不同临床指标的受试者操作特征（ROC）曲线，以评估上切牙最佳AP位置的诊断效率。
PAP组FA-ANS的平均值为0.57±1.99，与iPAP组的FA-ANS有显著差异。发现U1-NA、U1-SN、AB-NPo、UL-TVL、Wits和ANB等头影测量指标与FA-ANS相关。与其他临床指标相比，受试者操作特征（ROC）曲线显示FA-ANS具有更高的诊断效率。
ANS点作为一个稳定的骨骼标志，可用于确定上切牙的最佳AP位置，为临床实践中的临床诊断和治疗目标确定提供帮助。
新指标FA-ANS与其他传统指标一起，有助于确定上切牙的最佳位置，并提供个性化的治疗方案。
