Effects of premolar extraction and orthodontic treatment in adolescents - a retrospective cephalometric study.

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-03-26 DOI:10.1080/00016357.2023.2267145

Maria Ekstam, Mikael Sonesson, Kristina Hellén-Halme

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Abstract

Objectives: To evaluate the cephalometric effects of premolar extraction on skeletal and dental parameters, and on the soft tissues, in patients subsequently treated with fixed appliances. Prevalence and severity of external apical root resorption due to premolar extraction were also examined.

Materials and methods: The dental records of 79 patients treated with fixed appliances were retrieved (groups: extraction, n = 19; non-extraction, n = 60). Pre- and post-treatment statuses of skeletal, dentoalveolar, and soft tissue variables were analyzed on lateral cephalograms to determine change. Periapical radiographs of the maxillary incisors were assessed for external apical root resorption using the Levander & Malmgren index. The t-test, Mann-Whitney U test, chi-squared test, and Kruskal-Wallis test were used to analyze the data. Significance was set at p < .05.

Results: Changes in the protrusion and proclination of the incisors and in lip position were significantly different between the groups. Prevalence of external apical root resorption in the two groups was similar.

Conclusions: Our findings suggest that extraction therapy affects dentoalveolar traits but not jaw position, nor the risk of root resorption, in patients treated with fixed appliances.

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青少年前磨牙拔除和正畸治疗的效果——一项回顾性头影测量研究。

目的：评估前磨牙拔除对随后使用固定矫治器治疗的患者的骨骼和牙齿参数以及软组织的头影测量效果。还检查了由于前磨牙拔除引起的外部根尖吸收的患病率和严重程度。材料和方法：检索79例使用固定矫治器治疗的患者的牙科记录（组：拔牙 = 19；非提取，n = 60）。在侧位头影图上分析治疗前和治疗后骨骼、牙周和软组织变量的状态，以确定变化。使用Levander和Malmgren指数评估上颌切牙的根尖周x线片的根尖外吸收。采用t检验、Mann-Whitney U检验、卡方检验和Kruskal-Wallis检验对数据进行分析。显著性设置为p<.05。结果：两组门牙的突出和向内旋以及唇位的变化有显著差异。两组患者的根尖外吸收发生率相似。结论：我们的研究结果表明，在使用固定矫治器治疗的患者中，拔牙治疗会影响牙颌特征，但不会影响下颌位置，也不会影响牙根吸收的风险。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.