University of São Paulo, Bauru Dental School, Department of Orthodontics, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, São Paulo 17012-901, Brazil.
University of São Paulo, Bauru Dental School, Department of Orthodontics, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, São Paulo 17012-901, Brazil.
Int Orthod. 2020 Jun;18(2):286-296. doi: 10.1016/j.ortho.2020.01.005. Epub 2020 Feb 13.
This retrospective study aimed to compare the dentoskeletal and soft-tissue changes in Class II malocclusion patients treated with Jasper Jumper and Twin Force Bite Corrector associated with fixed orthodontic appliances.
The sample comprised 60 subjects divided into 3 groups. Patients with Class II malocclusion, mandibular retrusion, slight or no crowding and with no previous orthodontic treatment were eligible. Group 1 comprised 20 patients treated with the Jasper Jumper (JJ), with an initial age of 12.39 years. Group 2 comprised 20 patients treated with the Twin Force (TF), with an initial age of 11.83 years. The control group consisted of 20 untreated Class II subjects with an initial age of 12.13 years. Intergroup pretreatment comparisons were performed with One-way analysis of variance and intergroup treatment changes were compared with the Analysis of Covariance, both followed by Tukey test.
The TF group showed greater increase in mandibular length (6.23mm±4.64, P=0.004) than the control group (2.94mm±1.75). The mandibular incisors in the experimental groups presented significantly greater labial inclination and protrusion than the control (Md1.NB; JJ: 4.19°±2.09; TF: 4.46°±6.83; control: 1.13°±2.08, P=0.000/Md1-NB; JJ: 1.95mm±1.45; TF: 1.74mm±1.79; control: 0.31mm±0.81, P=0.000). In addition, the treated groups also showed significantly improvement of the dental relationships (Overjet; JJ: -4.05mm±4.64; TF: -3.80mm±2.12; control: 0.05mm±1.12, P=0.000/Overbite; JJ: -2.52mm±1.46; TF: -2.93mm±2.13; control: -0.63mm±1.35, P=0.000).
The Jasper Jumper and Twin Force associated to fixed appliances were effective in correcting Class II malocclusion with a combination of skeletal and dentoalveolar changes. However, the TF seems to provide more skeletal effects with greater maxillary growth restriction and mandibular length increase when compared to the JJ.
本回顾性研究旨在比较 Jasper Jumper 和 Twin Force Bite Corrector 联合固定矫治器治疗安氏Ⅱ类错牙合患者的牙颌面及软组织变化。
该样本包括 60 名患者，分为 3 组。纳入标准为安氏Ⅱ类错牙合、下颌后缩、轻度拥挤或不拥挤且无既往正畸治疗的患者。第 1 组包括 20 名使用 Jasper Jumper（JJ）治疗的患者，初始年龄为 12.39 岁。第 2 组包括 20 名使用 Twin Force（TF）治疗的患者，初始年龄为 11.83 岁。对照组由 20 名未经治疗的安氏Ⅱ类患者组成，初始年龄为 12.13 岁。组间预处理比较采用单因素方差分析，组间治疗变化采用协方差分析，均采用 Tukey 检验。
TF 组下颌长度增加（6.23mm±4.64，P=0.004）大于对照组（2.94mm±1.75）。实验组下颌切牙唇倾和突度显著大于对照组（Md1.NB；JJ：4.19°±2.09；TF：4.46°±6.83；对照组：1.13°±2.08，P=0.000/Md1-NB；JJ：1.95mm±1.45；TF：1.74mm±1.79；对照组：0.31mm±0.81，P=0.000）。此外，治疗组还明显改善了牙颌关系（覆颌；JJ：-4.05mm±4.64；TF：-3.80mm±2.12；对照组：0.05mm±1.12，P=0.000/覆盖；JJ：-2.52mm±1.46；TF：-2.93mm±2.13；对照组：-0.63mm±1.35，P=0.000）。
Jasper Jumper 和 Twin Force 联合固定矫治器可有效矫正安氏Ⅱ类错牙合，同时产生骨骼和牙颌的变化。然而，与 JJ 相比，TF 似乎能提供更多的骨骼效果，同时限制上颌生长并增加下颌长度。
