Dunbar Evelyn, Chalmers Elinor, Sivamurthy Gautham, Revie Gavin, McIntyre Grant T, Mossey Peter A
Orthodontic Department, Dundee Dental Hospital and Research School, Dundee, UK.
Research Methodologist, Dundee Dental Hospital and Research School, Dundee, UK.
J Orthod. 2025 Jun;52(2):115-132. doi: 10.1177/14653125241277832. Epub 2024 Sep 30.
To determine if re-establishment of occlusal contact was achieved within 6 months after insertion of a fixed anterior bite plane in individuals with Class II division 2 incisor relationship, and to evaluate the occlusal and vertical skeletal changes and acceptance of the intra-oral scanner and bite plane.
Single-centre two-arm parallel group randomised controlled trial with 1:1 allocation to intervention and control groups.
Dundee Dental Hospital and Research School, UK.
A total of 38 participants aged 9-16 years (11 males, 27 females) with Class II division 2 incisor relationship and increased overbite (greater than one-third incisor overlap).
Participants were randomised to intervention (n = 19) and control (n = 19) groups using block randomisation. The intervention group had a fixed anterior bite plane, and the occlusion and vertical facial dimensions were monitored with intra-oral scans, lateral cephalograms and photographs. The control group received no treatment and occlusal and vertical facial dimensions were monitored with scans and photographs. Questionnaires were completed by participants and parents/carers. An intention-to-treat analysis was planned.
The overbite reduced in all participants in the intervention group (mean initial overbite: 5.07 mm, 95% confidence interval [CI] = 4.15-6.00; mean overbite after 6 months: 2.45 mm, 95% CI = 1.93-2.96). There was a mean incisor intrusion of 0.29 mm (95% CI = 0.17-0.42) and mean eruption of the first molars of 0.23 mm (95% CI = 0.09-0.37). There was no significant change in incisor inclination or vertical skeletal change. Feedback from participants and their parents/carers were generally positive.
Fixed anterior bite planes effectively reduce an increased overbite in adolescents with a Class II division 2 incisor relationship, due to a combination of incisor intrusion and molar eruption with no change in incisor inclination or vertical skeletal change. Intra-oral scanning and fixed anterior bite planes are acceptable in adolescents.
确定在患有安氏II类2分类切牙关系的个体中，在佩戴固定前牙咬合平面6个月内是否重新建立了咬合接触，并评估咬合和垂直骨骼变化以及对口腔内扫描仪和咬合平面的接受情况。
单中心双臂平行组随机对照试验，干预组和对照组按1:1分配。
英国邓迪牙科医院及研究学院。
共有38名年龄在9至16岁之间的参与者（11名男性，27名女性），患有安氏II类2分类切牙关系且深覆合增加（切牙重叠大于三分之一）。
采用区组随机化将参与者随机分为干预组（n = 19）和对照组（n = 19）。干预组佩戴固定前牙咬合平面，并通过口腔内扫描、头颅侧位片和照片监测咬合和垂直面部尺寸。对照组不接受治疗，通过扫描和照片监测咬合和垂直面部尺寸。参与者及其父母/照顾者完成问卷调查。计划进行意向性分析。
干预组所有参与者的深覆合均减小（平均初始深覆合：5.07毫米，95%置信区间[CI]=4.15 - 6.00；6个月后的平均深覆合：2.45毫米，95%CI = 1.93 - 2.96）。切牙平均压低0.29毫米（95%CI = 0.17 - 0.42），第一磨牙平均萌出0.23毫米（95%CI = 0.09 - 0.37）。切牙倾斜度或垂直骨骼变化无显著改变。参与者及其父母/照顾者的反馈总体上是积极的。
固定前牙咬合平面可有效减小患有安氏II类2分类切牙关系的青少年的深覆合增加，这是由于切牙压低和磨牙萌出的综合作用，且切牙倾斜度和垂直骨骼变化无改变。口腔内扫描和固定前牙咬合平面在青少年中是可接受的。
