Twenty-year follow-up of functional treatment with a bionator appliance (part 2): a retrospective cephalometric analysis of skeletal and dentoskeletal changes.

IF 3 2区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Angle Orthodontist Pub Date : 2023-02-06 DOI:10.2319/062922-462.1
Rebecca Jungbauer, Niko C Bock, Alois Schmid, Peter Proff, Ingrid Rudzki
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引用次数: 0

Abstract

Objectives: To investigate skeletal and dentoskeletal changes 20 years after bionator treatment.

Materials and methods: Analog lateral cephalograms of 18 subjects treated with a bionator appliance during growth were digitized with a transmitted light scanner. Inclusion criteria were: increased overjet (≥4 mm), skeletal Class II, available lateral cephalograms before (T0), after (T1), and 20 years after (T2) treatment with only a Bionator. To assess standard cephalometric parameters, the software ivoris analyze was used. Data were analyzed using Friedman's two-way analysis of variance by ranks followed by Dunn's post hoc tests (P ≤ .05).

Results: During therapy (T0-T1), ANB decreased significantly by 1.9° and remained unchanged long term. SNA slightly decreased (-0.6°) during treatment, SNB and SNPg increased (+1.4°, +1.7°). All three parameters showed a significant increase at T2 (+1.2°, +1.6°, +1.6°). Vertical measurements (ML-NL, ML-NSL, NL-NSL) remained almost unchanged during therapy. NL-NSL also was unchanged during the long-term interval; ML-NSL and ML-NL decreased significantly (-3.4°, -4.9°). During treatment, the maxillary incisors retroclined (OK1-NL: -1.6°, OK1-NA: -0.6°), the mandibular incisors proclined (UK1-ML: +3.5°, UK1-NB: +4.9°), neither significantly. Long term, there was a nonsignificant tendency toward proclination of upper (OK1-NL: +0.1°, OK1-NA: +0.7°) and retroclination of lower incisors (UK1-ML: -1.5°, UK1-NB: -5°).

Conclusions: Changes of ANB after bionator treatment without additional fixed appliances remained stable after 20 years. The observed long-term changes are probably consequences of well-known physiological and age-related processes.

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仿生矫治器功能治疗二十年随访(第二部分):骨骼和牙槽骨变化的回顾性头颅测量分析。
目的:研究仿生治疗 20 年后骨骼和牙胚的变化:研究仿生矫治器治疗 20 年后骨骼和牙胚的变化:使用透射光扫描仪对 18 名在成长过程中接受仿生矫治器治疗的受试者的模拟侧位头影进行数字化处理。纳入标准为:过咬合增加(≥4 毫米),骨骼等级为 II 级,仅使用仿生矫治器治疗前(T0)、治疗后(T1)和治疗后 20 年(T2)的侧位头影可用。为了评估标准的头颅测量参数,使用了 ivoris analyze 软件。数据分析采用弗里德曼双向秩和方差分析,然后进行邓恩事后检验(P ≤ .05):结果:在治疗期间(T0-T1),ANB 明显下降了 1.9°,并且长期保持不变。在治疗期间,SNA 略有下降(-0.6°),SNB 和 SNPg 上升(+1.4°、+1.7°)。所有三个参数在 T2 期均有明显增加(+1.2°、+1.6°、+1.6°)。垂直测量(ML-NL、ML-NSL、NL-NSL)在治疗期间几乎保持不变。NL-NSL 在长期间隔期间也没有变化;ML-NSL 和 ML-NL 显著下降(-3.4°,-4.9°)。治疗期间,上颌切牙后倾(OK1-NL:-1.6°,OK1-NA:-0.6°),下颌切牙前倾(UK1-ML:+3.5°,UK1-NB:+4.9°),但均不明显。从长远来看,上切牙前倾(OK1-NL:+0.1°,OK1-NA:+0.7°)和下切牙后倾(UK1-ML:-1.5°,UK1-NB:-5°)的趋势并不明显:结论:在没有额外固定矫治器的情况下,仿生治疗后 ANB 的变化在 20 年后保持稳定。观察到的长期变化可能是众所周知的生理和年龄相关过程的结果。
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来源期刊
Angle Orthodontist
Angle Orthodontist 医学-牙科与口腔外科
CiteScore
6.40
自引率
5.90%
发文量
95
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.
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