Effect of maxillary and mandibular extrusion arches on dentoskeletal changes in adults with anterior open bite: a quantitative analysis.

IF 3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Angle Orthodontist Pub Date : 2023-01-01 DOI:10.2319/021922-155.1

Tasneem Hammad, Hassan Moussa, Wessam Marzouk, Hanan Amin Ismail

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引用次数: 0

Abstract

Objective: To quantify dentoskeletal changes accompanying the use of extrusion arches during the treatment of anterior open bite (AOB) in adults.

Materials and methods: A total of 23 adult patients with an AOB of -3.05 mm ± 1.27 mm were treated with upper and lower extrusion arches after the alignment phase. Lateral cephalograms were taken before placement of the extrusion arch, immediately after closure of the open bite (T2), and at the end of orthodontic treatment (T3). Data were statistically analyzed using repeated-measures analysis of variance and the Bonferroni post hoc test for pairwise comparisons (α = 0.05).

Results: Successful closure of AOB, with an overall change in overbite of 4.73 ± 1.93 mm, was achieved in an average of 3.8 months and remained stable at T3. Upper and lower incisors were significantly extruded by 2.05 mm ± 0.72 mm and 2.54 mm ± 1.63 mm, respectively, and significantly retroclined by 6.36° ± 1.63° and 8.45° ± 3.83°, respectively, with a resultant increase in the interincisal angle of 12.80° ± 2.09°. Statistically significant intrusion and mesial tipping (P < .001) of the maxillary and mandibular first molars were observed at T2. Dentoskeletal changes remained stable at T3, except for a significant reduction of the mesial tipping of the maxillary and mandibular first molars.

Conclusions: The combined use of maxillary and mandibular extrusion arches resulted in significant favorable dentoskeletal changes that led to the successful closure of AOB during a short duration of treatment.

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上颌和下颌挤压弓对成人前牙开咬牙齿骨骼变化的影响:定量分析。

目的:量化在成人前牙开咬(AOB)治疗过程中使用挤压弓的牙骨变化。材料与方法:23例AOB为-3.05 mm±1.27 mm的成人患者，在对准阶段后采用上下挤压弓治疗。在放置挤压弓前、开放咬合闭合后(T2)和正畸治疗结束时(T3)分别拍摄侧位脑电图。资料采用重复测量方差分析和Bonferroni事后两两比较检验进行统计学分析(α = 0.05)。结果:AOB闭合成功，覆盖牙合总体变化4.73±1.93 mm，平均3.8个月，在T3时保持稳定。上切牙和下切牙分别明显外倾2.05 mm±0.72 mm和2.54 mm±1.63 mm，明显后倾6.36°±1.63°和8.45°±3.83°，导致内切角增加12.80°±2.09°。T2时上颌和下颌第一磨牙的内嵌和中端倾斜有统计学意义(P < 0.001)。除了上颌和下颌第一磨牙的近端尖突明显减少外，牙齿骨骼的变化在T3时保持稳定。结论:上颌和下颌骨联合使用挤压弓可以在短时间内成功关闭AOB。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Angle Orthodontist 医学-牙科与口腔外科

CiteScore

6.40

自引率

5.90%

发文量

审稿时长

3 months

期刊介绍： The Angle Orthodontist is the official publication of the Edward H. Angle Society of Orthodontists and is published bimonthly in January, March, May, July, September and November by The EH Angle Education and Research Foundation Inc. The Angle Orthodontist is the only major journal in orthodontics with a non-commercial, non-profit publisher -- The E. H. Angle Education and Research Foundation. We value our freedom to operate exclusively in the best interests of our readers and authors. Our website www.angle.org is completely free and open to all visitors.