Treatment effects after maxillary expansion using invisalign first system vs. acrylic splint expander in mixed dentition: a prospective cohort study

BMC Oral Health

Research

Chengri Li¹  Lanxin Lu¹  Fang Yi¹  Lei Lei¹  Yanqin Lu²  Lingling Zhang³ 

[1] Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, 410008, Changsha, Hunan, China;Hunan Key Laboratory of Oral Health Research, Changsha, China;Hunan Clinical Research Center of Oral Major Diseases and Oral Health, Changsha, China;Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, 410008, Changsha, Hunan, China;Hunan Key Laboratory of Oral Health Research, Changsha, China;Hunan Clinical Research Center of Oral Major Diseases and Oral Health, Changsha, China;Department of Orthodontics, Hunan Key Laboratory of Oral Health Research & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital, Xiangya School of Stomatology, Central South University, 410008, Changsha, Hunan, China;Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, 410008, Changsha, Hunan, China;Hunan Key Laboratory of Oral Health Research, Changsha, China;Hunan Clinical Research Center of Oral Major Diseases and Oral Health, Changsha, China;The Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China;National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology, Changsha, China;

关键词: Invisalign First System;    RME;    Maxillary arch expansion;    Natural growth;    Propensity score matching;    Mixed dentition;   

DOI  :  10.1186/s12903-023-03312-4

 received in 2023-05-17, accepted in 2023-08-14,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundInvisalign First System (First) is a new type of orthodontic appliance for maxillary arch expansion in mixed dentition children. Till now, few studies have evaluated the expansion effects of First versus other appliances. What’s more, most studies of arch expansion did not include a natural group to rule out growth effects. This prospective cohort study aimed to evaluate the dental and dentoalveolar effects using First or acrylic splint rapid maxillary expander (RME) in adolescents excluding growth factors.Materials and methodsAfter screening by strict inclusion criteria and propensity score matching (PSM), fifty-one patients were included: First group (n = 17), RME group (n = 17), and natural growth (NG) group (n = 17). Nine indicators including dental arch width, dentoalveolar arch width, and inclination of the molars were measured on digital dental casts at baseline (T0) and six-month follow-up (T1). Paired t-tests were used for intra-group results, and two-sample independent t-tests were used for inter-group comparisons.ResultsThere was no significant increase in all indicators within six months in the NG group (p > 0.05). In the First group and RME group, all width indicators were significantly increased after treatment (p < 0.05). The RME group exhibited greater expansion than the First group in intercanine width, first interpremolar width, second interdeciduous molar width, first intermolar width, arch perimeter, intercanine dentoalveolar width, intermolar dentoalveolar width, and inclination of the molars (p < 0.05). Whereas, there was no significant difference in arch depth between the two treated groups.ConclusionsBoth First and RME can expand the maxillary arch in mixed dentition. In case of mild to moderate maxillary transverse deficiency (MTD), Invisalign First System could be a reasonable option. RME shows significant better efficiency of dental arch expansion than First, recommended for patients with severe MTD.Trial registrationThis prospective study was registered on ClinicalTrials.gov (01/02/2022, registration number: ChiCTR2200056220). The trial was approved by the Ethical Committee of the Hunan Xiangya Stomatological Hospital Central South University (20,200,088), and informed consent was obtained from all subjects and their legal guardian(s).

【 授权许可】

CC BY   
© BioMed Central Ltd., part of Springer Nature 2023

【 图 表 】

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