Hansen K, Iemamnueisuk P, Pancherz H
Department of Orthodontics, Lund University, Malmö, Sweden.
Br J Orthod. 1995 May;22(2):123-34. doi: 10.1179/bjo.22.2.123.
The purpose of this study was to evaluate biometrically the treatment and post-treatment effects of the Herbst appliance on the dental arches and arch relationships. The sample consisted of 53 Class II, division 1 malocclusion patients (33 boys and 20 girls) treated with the Herbst appliance. The mean age of the patients before treatment was 12.5 years (SD = 1.2 years). Dental casts were analysed before treatment, after treatment, 6 months post-treatment and at the end of the growth period (5-10 years post-treatment). The following variables were assessed: sagittal molar and canine relationships, overjet, overbite, maxillary and mandibular arch perimeters, and inter-molar and inter-canine dental arch widths. During treatment, the overjet, overbite, and sagittal molar relationship were overcorrected in most of the cases, while the sagittal canine relationship was normalized. The maxillary and mandibular arch perimeters increased during treatment, as did dental arch widths (molar and canine). In the long-term (mean = 6.7 years after treatment), Herbst appliance treatment resulted in a normal or over-corrected sagittal molar relationship in 79 per cent and a normal canine relationship in 68 per cent of the cases. Eighty-three per cent of the subjects had an overjet of 4.5 mm or less. In the long-term, the arch perimeters seemed to follow a normal dental development pattern. The increase of the upper molar and canine dental arch widths during treatment remained virtually stable whilst the lower intermolar arch widths seemed unaffected by treatment.
本研究的目的是从生物测量学角度评估Herbst矫治器对牙弓及牙弓关系的治疗效果和治疗后效果。样本包括53例使用Herbst矫治器治疗的安氏II类1分类错牙合患者（33名男孩和20名女孩）。治疗前患者的平均年龄为12.5岁（标准差 = 1.2岁）。在治疗前、治疗后、治疗后6个月以及生长发育期结束时（治疗后5 - 10年）对石膏模型进行分析。评估了以下变量：矢状向磨牙和尖牙关系、覆盖、覆牙合、上颌和下颌牙弓周长以及磨牙间和尖牙间牙弓宽度。在治疗期间，大多数病例的覆盖、覆牙合和矢状向磨牙关系被过度矫正，而矢状向尖牙关系恢复正常。治疗期间上颌和下颌牙弓周长增加，牙弓宽度（磨牙和尖牙）也增加。从长期来看（平均治疗后6.7年），Herbst矫治器治疗使79%的病例的矢状向磨牙关系正常或过度矫正，68%的病例尖牙关系正常。83%的受试者覆盖为4.5 mm或更小。从长期来看，牙弓周长似乎遵循正常的牙齿发育模式。治疗期间上颌磨牙和尖牙牙弓宽度的增加基本保持稳定，而下颌磨牙间牙弓宽度似乎不受治疗影响。
