Harris E F, Vaden J L
Department of Orthodontics, University of Tennessee, College of Dentistry, Memphis.
Int J Adult Orthodon Orthognath Surg. 1994;9(1):19-29.
Orthodontic treatment of adults differs in many ways from that of the conventional adolescent patient. Adults are essentially nongrowing and have lower turnover rates of alveolar bone. These and other factors may affect the posttreatment stability of adult dentitions. This study compared the stability of orthodontic outcomes in matched samples of adolescents (about 13 years of age) and adults (about 30 years old) at an average of 5 years out of treatment. Analysis disclosed few differences between age groups; both exhibited considerable stability. Regarding key treatment considerations--such as midline alignment, incisor overbite and overjet, incisor irregularity, and molar relationship--both groups changed to equivalent degrees (and very little on average). Although minor differences were found (eg, arch length decreased more in adults), treatment changes in this sample of adults were at least as stable as those in the adolescents for all clinically relevant variables.
成人正畸治疗在许多方面与传统的青少年患者不同。成人基本不再生长，牙槽骨的更新率较低。这些因素以及其他因素可能会影响成人牙列治疗后的稳定性。本研究比较了平均治疗后5年的青少年（约13岁）和成人（约30岁）匹配样本中正畸治疗结果的稳定性。分析显示不同年龄组之间差异不大；两组均表现出相当的稳定性。关于关键的治疗考量因素——如中线对齐、切牙覆合和覆盖、切牙不齐以及磨牙关系——两组的变化程度相当（平均变化很小）。尽管发现了一些细微差异（例如，成人的牙弓长度减少更多），但在所有临床相关变量方面，该成人样本的治疗变化至少与青少年样本一样稳定。
