Linda Bokander Matilainen, Kristina Johansson, Michal Wiaderny, Anna Brechter, Sofia Petrén, Vincenzo D'Antò, Liselotte Paulsson
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Primary outcome was assessed with weighted Peer Assessment Rating index (wPAR) and secondary outcomes with Little's Irregularity Index (LII), and as transversal width (mm), incisor inclination (°), position (mm) and treatment time (months).</p><p><strong>Results: </strong>Intergroup differences in wPAR with mean score reductions of -24.07 (CB) and -22.11 (PSLB), LII upper/lower arch reductions of -9.02/-5.96 (CB) and -8.44/-5.29 (PSLB), and mean treatment times of 21.74 (CB) and 24.35 (PSLB) months were non-significant (NS). Lateral expansion was greater in the PSLB group during alignment; mean intergroup maxillary differences (MD) were 1.35 at inter-canines, 1.21 mm at first inter-premolars, and mandibular MD were 0.75 at first, 0.76 mm at second inter-premolars (p ≤ 0.019). Greater incisor proclination was observed in the CB group (L1NB, MD = 2.28°; ILiML, MD = 2.23°) (p ≤ 0.016). Intergroup differences post-treatment were NS.</p><p><strong>Conclusion: </strong>Great occlusal treatment outcomes were observed in both groups with no significant difference in treatment time. Although the expansion patterns differed during alignment, no significant intergroup difference remained after treatment.</p><p><strong>Trial registration: </strong>The protocol is registered on ClinicalTrials.gov (NCT05664282).</p>","PeriodicalId":19652,"journal":{"name":"Orthodontics & Craniofacial Research","volume":" ","pages":""},"PeriodicalIF":1.7000,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Treatment Effects and Treatment Time in Adolescents With Crowded and Displaced Teeth Treated With Fixed Appliance Systems Without Extractions: A Multi-Centre Randomised Controlled Trial.\",\"authors\":\"Linda Bokander Matilainen, Kristina Johansson, Michal Wiaderny, Anna Brechter, Sofia Petrén, Vincenzo D'Antò, Liselotte Paulsson\",\"doi\":\"10.1111/ocr.70005\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Objectives: </strong>To assess and compare treatment effects and treatment time in adolescents with crowded and displaced teeth during and after non-extraction treatments using a passive self-ligating bracket system (PSLB) and a conventional bracket system (CB).</p><p><strong>Materials and methods: </strong>Consecutive adolescents (12-17 years old) with crowded and displaced teeth were randomised through computer generated block randomisation in a two-arm parallel-group design, to non-extraction fixed appliance treatment with either PSLB (Damon Q, n = 62) or CB (Victory, n = 70) at four orthodontic clinics. Study models and cephalograms were collected at baseline, post-alignment and post-treatment. Primary outcome was assessed with weighted Peer Assessment Rating index (wPAR) and secondary outcomes with Little's Irregularity Index (LII), and as transversal width (mm), incisor inclination (°), position (mm) and treatment time (months).</p><p><strong>Results: </strong>Intergroup differences in wPAR with mean score reductions of -24.07 (CB) and -22.11 (PSLB), LII upper/lower arch reductions of -9.02/-5.96 (CB) and -8.44/-5.29 (PSLB), and mean treatment times of 21.74 (CB) and 24.35 (PSLB) months were non-significant (NS). Lateral expansion was greater in the PSLB group during alignment; mean intergroup maxillary differences (MD) were 1.35 at inter-canines, 1.21 mm at first inter-premolars, and mandibular MD were 0.75 at first, 0.76 mm at second inter-premolars (p ≤ 0.019). Greater incisor proclination was observed in the CB group (L1NB, MD = 2.28°; ILiML, MD = 2.23°) (p ≤ 0.016). 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引用次数: 0
摘要
目的：评价和比较被动自结扎托槽系统（PSLB）与传统托槽系统（CB）在非拔牙治疗期间和之后对青少年牙齿拥挤和移位的治疗效果和治疗时间。材料和方法：在4个正畸诊所，连续12-17岁牙齿拥挤和移位的青少年（12-17岁）通过计算机生成的块随机化，在双臂平行组设计中随机分组，使用PSLB （Damon Q, n = 62）或CB （Victory, n = 70）进行非拔牙固定矫治器治疗。在基线、对准后和治疗后收集研究模型和脑电图。主要结局采用加权同行评价评分指数（wPAR）进行评价，次要结局采用Little’s不规则指数（LII）、横宽度（mm）、切牙倾斜度（°）、位置（mm）和治疗时间（月）进行评价。结果：wPAR平均评分降低-24.07 （CB）和-22.11 (PSLB)， LII上/下弓降低-9.02/-5.96 （CB）和-8.44/-5.29 (PSLB)，平均治疗时间21.74 （CB）和24.35 （PSLB）月，组间差异无统计学意义（NS）。PSLB组在对中时的侧位扩张更大；上颌组间平均MD为犬齿间1.35，第一前磨牙间1.21 mm，下颌第一前磨牙间MD为0.75，第二前磨牙间MD为0.76 mm （p≤0.019）。CB组大门牙前倾(L1NB, MD = 2.28°；ILiML, MD = 2.23°)（p≤0.016）。治疗后组间差异为NS。结论：两组治疗效果均较好，治疗时间差异无统计学意义。虽然在排列过程中扩张模式有所不同，但处理后各组间差异不显著。试验注册：该方案已在ClinicalTrials.gov （NCT05664282）上注册。
Treatment Effects and Treatment Time in Adolescents With Crowded and Displaced Teeth Treated With Fixed Appliance Systems Without Extractions: A Multi-Centre Randomised Controlled Trial.
Objectives: To assess and compare treatment effects and treatment time in adolescents with crowded and displaced teeth during and after non-extraction treatments using a passive self-ligating bracket system (PSLB) and a conventional bracket system (CB).
Materials and methods: Consecutive adolescents (12-17 years old) with crowded and displaced teeth were randomised through computer generated block randomisation in a two-arm parallel-group design, to non-extraction fixed appliance treatment with either PSLB (Damon Q, n = 62) or CB (Victory, n = 70) at four orthodontic clinics. Study models and cephalograms were collected at baseline, post-alignment and post-treatment. Primary outcome was assessed with weighted Peer Assessment Rating index (wPAR) and secondary outcomes with Little's Irregularity Index (LII), and as transversal width (mm), incisor inclination (°), position (mm) and treatment time (months).
Results: Intergroup differences in wPAR with mean score reductions of -24.07 (CB) and -22.11 (PSLB), LII upper/lower arch reductions of -9.02/-5.96 (CB) and -8.44/-5.29 (PSLB), and mean treatment times of 21.74 (CB) and 24.35 (PSLB) months were non-significant (NS). Lateral expansion was greater in the PSLB group during alignment; mean intergroup maxillary differences (MD) were 1.35 at inter-canines, 1.21 mm at first inter-premolars, and mandibular MD were 0.75 at first, 0.76 mm at second inter-premolars (p ≤ 0.019). Greater incisor proclination was observed in the CB group (L1NB, MD = 2.28°; ILiML, MD = 2.23°) (p ≤ 0.016). Intergroup differences post-treatment were NS.
Conclusion: Great occlusal treatment outcomes were observed in both groups with no significant difference in treatment time. Although the expansion patterns differed during alignment, no significant intergroup difference remained after treatment.
Trial registration: The protocol is registered on ClinicalTrials.gov (NCT05664282).
期刊介绍：
Orthodontics & Craniofacial Research - Genes, Growth and Development is published to serve its readers as an international forum for the presentation and critical discussion of issues pertinent to the advancement of the specialty of orthodontics and the evidence-based knowledge of craniofacial growth and development. This forum is based on scientifically supported information, but also includes minority and conflicting opinions.
The objective of the journal is to facilitate effective communication between the research community and practicing clinicians. Original papers of high scientific quality that report the findings of clinical trials, clinical epidemiology, and novel therapeutic or diagnostic approaches are appropriate submissions. Similarly, we welcome papers in genetics, developmental biology, syndromology, surgery, speech and hearing, and other biomedical disciplines related to clinical orthodontics and normal and abnormal craniofacial growth and development. In addition to original and basic research, the journal publishes concise reviews, case reports of substantial value, invited essays, letters, and announcements.
The journal is published quarterly. The review of submitted papers will be coordinated by the editor and members of the editorial board. It is policy to review manuscripts within 3 to 4 weeks of receipt and to publish within 3 to 6 months of acceptance.
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