Hourfar Jan, Kinzinger Gero Stefan Michael, Meißner Luisa Katharina, Lisson Jörg Alexander
Orthodontic Practice, Reinheim, Germany.
Department of Orthodontics, University of Heidelberg, Heidelberg, Germany.
J Orofac Orthop. 2017 Mar;78(2):166-175. doi: 10.1007/s00056-016-0071-z. Epub 2016 Nov 28.
Aim of the study was the comparison of treatment effects upon pharyngeal depth in patients treated with either (1) S-II-appliance or (2) Activator.
Pre- and posttreatment lateral cephalograms of 73 patients were analyzed using a customized set of measurements. According to predefined criteria, patients were either treated with S-II-appliance or Activator. Pharyngeal depth was assessed from cranial to caudal at six levels (P1 to P6). Paired t tests were used for intragroup and t tests for independent samples for intergroup comparisons. Results were considered statistically significant at p ≤ 0.05.
37 (22 female, 15 male) patients were treated with the S-II-appliance (mean pretreatment age 11.1 ± 1.07 years), and 36 (20 female, 16 male) patients with an Activator (mean pretreatment age 11.3 ± 1.12 years). Mean treatment time was 14 months for the S-II-appliance and 12 months for the Activator. Most measurements at the different levels showed an average increase ranging from approximately 0.5 mm to almost 2 mm. Changes were more pronounced in S-II patients. In contrast to intergroup comparisons, some intragroup comparisons revealed statistically significant differences at levels P5 (p = 0.0062) and P6 (p = 0.0155) in S-II patients and at P1-level (p = 0.0197) in Activator patients.
Both appliances similarly led to an increase of the pharyngeal depth. The sites of statistically significant changes differed.
本研究旨在比较使用（1）S-II矫治器或（2）肌激动器治疗的患者在咽部深度方面的治疗效果。
使用一套定制的测量方法，对73例患者治疗前和治疗后的头颅侧位片进行分析。根据预先定义的标准，患者分别接受S-II矫治器或肌激动器治疗。从颅侧到尾侧六个水平（P1至P6）评估咽部深度。组内比较采用配对t检验，组间比较采用独立样本t检验。结果在p≤0.05时被认为具有统计学意义。
37例（22例女性，15例男性）患者接受S-II矫治器治疗（治疗前平均年龄11.1±1.07岁），36例（20例女性，16例男性）患者接受肌激动器治疗（治疗前平均年龄11.3±1.12岁）。S-II矫治器的平均治疗时间为14个月，肌激动器为12个月。不同水平的大多数测量显示平均增加范围约为0.5毫米至近2毫米。S-II矫治器治疗的患者变化更明显。与组间比较不同，一些组内比较显示S-II矫治器治疗的患者在P5水平（p = 0.0062）和P6水平（p = 0.0155）以及肌激动器治疗的患者在P1水平（p = 0.0197）存在统计学显著差异。
两种矫治器均同样导致咽部深度增加。统计学显著变化的部位有所不同。
