Danelin Peña-Reyes, Jessica Quereza Freitas, Karina Maria Salvatore Freitas, Silvio Augusto Bellini-Pereira, Aron Aliaga-Del Castillo, Guilherme Janson, Marcos Roberto Freitas
{"title":"Third Molar Comparison in Class I and II Extraction and Non-extraction Orthodontic Treatment: A Retrospective Longitudinal Study.","authors":"Danelin Peña-Reyes, Jessica Quereza Freitas, Karina Maria Salvatore Freitas, Silvio Augusto Bellini-Pereira, Aron Aliaga-Del Castillo, Guilherme Janson, Marcos Roberto Freitas","doi":"10.4274/TurkJOrthod.2023.2022.160","DOIUrl":null,"url":null,"abstract":"<p><strong>Objective: </strong>This study compared third molar angulation and eruption status in Class I and II malocclusions after orthodontic treatment with and without first premolar extractions.</p><p><strong>Methods: </strong>The sample comprised 93 patients divided into four groups: Group 1, Class I malocclusion treated with first premolar extractions; Group 2, Class I malocclusion treated without extractions; Group 3, Class II malocclusion treated with first premolar extractions; and Group 4, Class II malocclusion treated without extractions. Panoramic radiographs were used to evaluate the third molar mesiodistal angulations at T1 (pretreatment), T2 (posttreatment), and T3 (long-term posttreatment). Third molar eruption status was assessed in dental casts. Intergroup angulations and eruption status comparisons were performed using one-way analysis of variance (ANOVA), followed by Tukey's test and Kruskal-Wallis test, respectively.</p><p><strong>Results: </strong>Significantly greater mesial angulation and percentage of erupted right maxillary third molars were observed in the Class I extraction group. Significantly greater eruption status of the right mandibular third molars was observed in the Class I and Class II malocclusion extraction groups.</p><p><strong>Conclusion: </strong>Class I and II malocclusion extraction treatment exhibited more favorable angulations and a greater number of erupted third molars than non-extraction treatment. The non-extraction groups exhibited a greater percentage of unerupted third molars.</p>","PeriodicalId":37013,"journal":{"name":"Turkish Journal of Orthodontics","volume":"37 1","pages":"7-13"},"PeriodicalIF":0.8000,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10986453/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Turkish Journal of Orthodontics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4274/TurkJOrthod.2023.2022.160","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}
引用次数: 0
Abstract
Objective: This study compared third molar angulation and eruption status in Class I and II malocclusions after orthodontic treatment with and without first premolar extractions.
Methods: The sample comprised 93 patients divided into four groups: Group 1, Class I malocclusion treated with first premolar extractions; Group 2, Class I malocclusion treated without extractions; Group 3, Class II malocclusion treated with first premolar extractions; and Group 4, Class II malocclusion treated without extractions. Panoramic radiographs were used to evaluate the third molar mesiodistal angulations at T1 (pretreatment), T2 (posttreatment), and T3 (long-term posttreatment). Third molar eruption status was assessed in dental casts. Intergroup angulations and eruption status comparisons were performed using one-way analysis of variance (ANOVA), followed by Tukey's test and Kruskal-Wallis test, respectively.
Results: Significantly greater mesial angulation and percentage of erupted right maxillary third molars were observed in the Class I extraction group. Significantly greater eruption status of the right mandibular third molars was observed in the Class I and Class II malocclusion extraction groups.
Conclusion: Class I and II malocclusion extraction treatment exhibited more favorable angulations and a greater number of erupted third molars than non-extraction treatment. The non-extraction groups exhibited a greater percentage of unerupted third molars.
研究目的本研究比较了第一前磨牙拔除和未拔除第一前磨牙的正畸治疗后,Ⅰ类和Ⅱ类错牙合中第三磨牙的成角和萌出状况:样本包括 93 名患者,分为四组:第一组,第一前磨牙拔除矫治后的 I 类错牙合畸形;第二组,第一前磨牙拔除矫治后未拔除的 I 类错牙合畸形;第三组,第一前磨牙拔除矫治后的 II 类错牙合畸形;第四组,第一前磨牙拔除矫治后未拔除的 II 类错牙合畸形。使用全景X光片评估第三磨牙在T1(治疗前)、T2(治疗后)和T3(治疗后长期)的牙期中线角度。第三磨牙的萌出状况通过牙模进行评估。组间角度和萌出状况比较采用单因素方差分析(ANOVA),然后分别进行Tukey's检验和Kruskal-Wallis检验:结果:观察到I类拔牙组的中轴角度和右上颌第三磨牙萌出的百分比明显更大。结论:结论:与非拔牙治疗相比,Ⅰ类和Ⅱ类错颌畸形拔牙治疗显示出更有利的角度和更多的第三磨牙萌出。结论:Ⅰ类和Ⅱ类错颌畸形拔牙治疗比非拔牙治疗显示出更有利的角度和更多的萌出第三磨牙,而非拔牙组显示出更大比例的未萌出第三磨牙。