Clinical Study on the Treatment of Class Ⅱ and Class Ⅰ Malocclusion in Adolescents with Mandibular Recession Using Invisible Orthodontic Appliances Without Brackets
Lan Shaoying
Shi Jingrui
Abstract：Objective:To study the clinical effect of invisible orthodontic appliances without brackets on the treatment of ClassⅡ and Class Ⅰ malocclusion in adolescents with mandibular retrusion.Methods:80 patients with Class Ⅱ and Class Ⅰ malocclusion with mandibular retrognathia admitted to the hospital from March 2020 to December 2022 were selected.They were divided into two groups based on different treatment methods,with 40 cases in each group.The control group received orthodontic treatment with straight wire arch fixators,while the observation group received treatment with invisible braces without brackets.The treatment time,preoperative and postoperative cephalometric parameters[lower alveolar seating angle(SNB),upper alveolar seating angle(SNA),upper and lower alveolar seating angle(ANB)]levels,preoperative and postoperative temporomandibular joint parameter levels,preoperative and postoperative quality of life scores,and complications between two groups were compared.Results:Compared with the control group,the observation group had a shorter mandibular retraction correction time,and the difference was statistically significant(t=4.363,P＜0.05).1 month after surgery,compared with the control group,the observation group had lower scores on the health impact scale and better quality of life,with statistically significant differences(t=3.807,5.598,4.382,4.137;P＜0.001).Conclusion:Patients with Class Ⅱ and Class Ⅰ malocclusion with mandibular retrusion who wear invisible orthodontic appliances without brackets have significant therapeutic effect.They can shorten the correction cycle,improve temporomandibular joint parameters and cephalometric measurement parameters,improve quality of life,and have good safety.
Keywords：Mandibular recession typeClass ⅡClass Ⅰ malocclusionCorrection with straight wire arch fixatorTherapeutic effectInvisible orthodontic appliances without bracketsHead shadow measurement parameters
Publication Date：2025-04-10
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 803-805 )