尤皮克儿童第一恒磨牙缺失后自发性间隙关闭和超萌出的预测因素的放射学评估。

Radiographic Evaluation of Predictors for Spontaneous Space Closure and Supereruption After the Loss of Permanent First Molars in Yup'ik Children.

机构信息

Southeast Alaska Regional Health Consortium, Juneau, Alaska, USA.

University of Minnesota School of Dentistry, Minneapolis, Minn., USA.

出版信息

Pediatr Dent. 2023 May 15;45(3):252-258.

PMID:37381127

Abstract

PURPOSE

The purpose of this study was to evaluate pre-extraction variables associated with spontaneous space closure between the permanent second molar (PSM) and the second premolar following early extraction of the permanent first molar (PFM). Additionally, this study aimed to assess supereruption in compensated and uncompensated maxillary molars to determine if compensating extraction increases the odds of spontaneous space closure.

METHODS

A total of 134 patients aged six to 12 years with extracted PFM(s) were evaluated for spontaneous man- dibular space closure. Panoramic radiographs were reviewed to assess pre-extraction variables. Bitewing radiographs of 156 patients aged six to 13 years with previous PFM extractions were used to measure supereruption in compensated and uncompensated extractions. Both compensated and uncompensated extractions were evaluated for complete mandibular space closure.

RESULTS

Statistically significant predictors of space closure included extraction at age eight to 10 years (P=0.04; 95 percent confidence interval [95% CI] equals 0.08 to 0.91), permanent third molar presence (P=0.02; 95% CI equals 1.16 to 4.9), and follow-up time (P=0.001; 95% CI equals 1.16 to 1.69). The odds of uncompensated PFM super- eruption were greater than those of compensated PFM supereruption (P<0.001; 95% CI equals 1.86 to 6.92). Additional follow-up increased the odds of supereruption (P<0.001; 95% CI equals 1.08 to 1.30). Uncompensated extractions did not reduce the odds of spontaneous space closure (P=0.54; 95% CI equals 0.56 to 3.08).

CONCLUSIONS

Permanent first molar extraction later than age 10 years is a negative predictor for spontaneous space closure, while permanent third molar presence is a positive predictor. Uncompensated maxillary PFMs do not inhibit spontaneous per- manent mandibular second molar space closure; however, uncompensated extractions are more likely to supererupt.

摘要

目的

本研究旨在评估恒牙第一磨牙（PFM）早期拔除后，永久性第二磨牙（PSM）与第二前磨牙之间自发性间隙关闭的相关拔牙前变量。此外，本研究旨在评估补偿性和非补偿性上颌磨牙的超萌出情况，以确定补偿性拔牙是否会增加自发性间隙关闭的几率。

方法

共评估了 134 名 6 至 12 岁接受 PFM 拔除的患者，评估其下颌骨自发性间隙关闭情况。回顾全景片以评估拔牙前的变量。对 156 名 6 至 13 岁有 PFM 拔牙史的患者进行牙尖交错位咬合片测量，以测量补偿性和非补偿性拔牙的超萌出情况。评估所有补偿性和非补偿性拔牙的下颌骨完全间隙关闭情况。

结果

有统计学意义的空间关闭预测因素包括 8 至 10 岁拔牙（P=0.04；95%置信区间[95%CI]为 0.08 至 0.91）、第三磨牙存在（P=0.02；95%CI 为 1.16 至 4.9）和随访时间（P=0.001；95%CI 为 1.16 至 1.69）。非补偿性 PFM 超萌出的几率大于补偿性 PFM 超萌出的几率（P<0.001；95%CI 为 1.86 至 6.92）。随访时间增加会增加超萌出的几率（P<0.001；95%CI 为 1.08 至 1.30）。非补偿性拔牙并不能降低自发性空间关闭的几率（P=0.54；95%CI 为 0.56 至 3.08）。