Esthetic perception of changes in facial profile resulting from orthodontic treatment with extraction of premolars: A systematic review

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• 作者：Walter Iared ; DDS ; MSc ; ^{walter.iared@gmail.com}Author Vitae ; Edina Mariko Koga da Silva ; MD ; PhDAuthor Vitae ; Wagner Iared ; MD ; PhDAuthor Vitae ; Cristiane Rufino Macedo ; DDS ; PhDAuthor Vitae
• 关键词：Orthodontics ; malocclusion ; tooth extraction ; esthetics ; cephalometry ; evidence-based dentistry
• 刊名：The Journal of the American Dental Association
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：148
• 期：1
• 页码：9-16
• 全文大小：517 K
• 卷排序：148

文摘

The authors conducted a systematic review to assess changes in patients’ facial profiles resulting from orthodontic treatment with and without extraction of 4 premolars and to identify cephalometric parameters that can assist decision making in borderline cases.Types of Studies ReviewedThe authors conducted a systematic review of randomized clinical trials and observational studies comparing the 2 types of treatment (with and without premolar extraction) in terms of the changes in facial profile. The authors conducted an electronic search of the databases the Cochrane Library, PubMed MEDLINE, Embase, and Latin-American and Caribbean Health Sciences Literature.ResultsThe authors identified 1 clinical trial with 26 participants and 5 observational cohort studies, collectively involving 362 participants. The authors assessed cephalometric parameters and esthetic outcomes. Four studies used linear regression analysis to investigate esthetic interaction between treatment strategy and initial lower lip protrusion. The 4 studies determined that if the initial lip protrusion was beyond a determined point, esthetic preferences favored extraction, and if the initial lip protrusion was not to that point, esthetic preferences favored conservative treatment.Conclusions and Practical ImplicationsThe results of the authors’ systematic review found no significant differences between the groups in terms of the esthetic outcomes. The cephalometric parameter of initial lip protrusion can help with decision making in borderline cases.