Thomas M. Graber Visiting Scholar, Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.
Am J Orthod Dentofacial Orthop. 2012 Jul;142(1):75-82. doi: 10.1016/j.ajodo.2012.02.024.
The aim of this prospective clinical trial was to compare the outcomes of prepubertal vs pubertal treatment of deepbite patients with a protocol including biteplane and fixed appliances.
A sample of 58 subjects with deepbite completed the study. A total of 34 subjects received treatment with removable biteplane appliances in the mixed dentition at a prepubertal stage of skeletal maturation (early treatment group), and 24 subjects were treated at a pubertal stage of skeletal maturation in the permanent dentition (late treatment group). All subjects of both groups were reevaluated after an average period of 15 months after the completion of fixed appliance therapy. Treatment outcomes were assessed statistically after a phase with removable biteplane appliances and at the posttreatment observation.
Treatment duration was significantly shorter in the early treatment group than in the late treatment group. Overbite reduction was significantly greater in the late treatment group (-3.1 mm) than in the early treatment group (-1.4 mm). In the late treatment group, 92% of the patients had a corrected overbite 1 year after therapy.
Treatment of deepbite at puberty in the permanent dentition leads to significantly more favorable outcomes than treatment before puberty in the mixed dentition.
本前瞻性临床试验的目的是比较使用包括咬合板和固定矫治器的方案对青春前期和青春期深覆𬌗患者的治疗效果。
共有 58 名深覆𬌗患者完成了本研究。共有 34 名患者在混合牙列的骨骼成熟的青春前期阶段接受了可摘式咬合板矫治器治疗（早期治疗组），24 名患者在恒牙列的青春期阶段接受了治疗（晚期治疗组）。所有两组患者在固定矫治器治疗完成后平均 15 个月后均进行了重新评估。在使用可摘式咬合板矫治器的阶段和治疗后观察阶段，对治疗结果进行了统计学评估。
早期治疗组的治疗持续时间明显短于晚期治疗组。晚期治疗组的覆𬌗减少量（-3.1mm）明显大于早期治疗组（-1.4mm）。在晚期治疗组，92%的患者在治疗 1 年后的覆𬌗得到了纠正。
与在混合牙列的青春前期治疗相比，在恒牙列的青春期进行深覆𬌗治疗会产生更有利的效果。
