Effectiveness of modifications to preadjusted appliance prescriptions based on racial dental characteristics assessed by the ABO Cast-Radiograph Evaluation: A propensity score matching study

PeerJ

article

Yanhao Chu¹  Lingling Zhang¹  Yatao Zhao¹  Fang Yi¹  Yanqin Lu¹ 

[1] Department of Orthodontics, Xiangya School of Stomatology, Hunan Key Laboratory of Oral Health Research, Xiangya Stomatological Hospital, Central South University

关键词: Preadjusted appliance prescription;    Self-ligating appliance;    Racial difference;    Normal occlusion;   

DOI  :  10.7717/peerj.10605

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

BackgroundBecause racial discrepancies in dental characteristics are known to exist, designing preadjusted appliances according to racial normal occlusion data would be expected to improve treatment results. However, whether modifications based on racial characteristics can improve treatment outcomes in the clinic remains to be investigated.MethodsTo study the influence of prescription type on treatment outcomes, 91 patients treated with Chinese or Roth prescription appliances were selected as an initial sample. Two groups of patients were selected by propensity score matching (1:1) to limit the effects of confounding factors, including age, sex, case complexity, and extraction plan. Discrepancy Index and cervical vertebral maturation values were used to quantify case complexity and patient age, respectively. After matching, the final sample of 60 patients consisted of two groups of 30 patients each: group 1 had been treated with a Chinese prescription appliance and group 2 had been treated with a Roth prescription appliance. ABO casts and radiograph evaluation (CR-Eval) and lateral cephalograms were utilized to compare the treatment outcomes of the two groups.ResultsThe total ABO scores of groups 1 and 2 were 22.03 and 23.87, respectively. There were no significant differences between the two groups in total ABO score or in seven other sub-scores; however, there was a significant difference between the two groups in mandibular canine alignment score.ConclusionsThere are no significant differences in overall treatment outcomes between the Chinese and Roth prescription appliances. The Chinese prescription yielded better alignment results in the mandibular canine for Chinese patients.

【 授权许可】

CC BY