Department of Orthodontics, Case Western Reserve University, Cleveland, Ohio, USA.
Am J Orthod Dentofacial Orthop. 2010 Feb;137(2):178-86. doi: 10.1016/j.ajodo.2008.09.028.
Pretreatment characteristics can assist orthodontists in accurately estimating treatment duration.
This case-control study identified 400 patients, 9 to 18 years of age. Short treatment duration was 20 months or less, and long treatment duration was 30 months or longer. Potential pretreatment explanatory variables included planned treatment, sociodemographic, behavior, dental, skeletal, and soft-tissue characteristics. Univariable and multivariable logistic regression modeling was used to quantify the association between patient characteristics and treatment duration by reporting the unadjusted odds ratios (ORcrude), the adjusted odds ratios (ORadj), and the 95% confidence intervals (CIs).
Patients planned as nonextraction (ORadj = 2.3; 95% CI, 1.3-4.2), no deciduous teeth (ORadj = 3.0; 95% CI, 1.5-5.9), less than 80% overbite (ORadj = 2.4; 95% CI, 1.3-4.4), less than 6 mm of maxillary crowding (ORadj = 3.6; 95% CI, 1.7-7.7), and good oral hygiene (ORadj = 3.2; 95% CI, 1.3-1.8) were 2 to 3 times more likely to have short treatments. Patients with decreased lower facial height (ORadj = 3.4; 95% CI, 1.6-7.1), extractions (ORadj = 1.8; 95% CI, 1.0-3.2), deciduous teeth (ORadj = 1.9; 95% CI, 1.0-3.4), poor grades (ORadj = 2.0; 95% CI, 1.1-3.8), excessive overjet (ORadj = 2.3; 95% CI, 1.4-3.8), 80% or more overbite (ORadj = 2.0; 95% CI,1.2-3.6), and 6 mm or more of maxillary crowding (ORadj = 2.6; 95% CI,1.4-4.6) were 2 to 3 times more likely to have long treatments.
Presence or absence of severe maxillary crowding, deciduous teeth, 80% overbite, and extractions were consistently, inversely, and independently associated with short and long treatment durations.
治疗前特征可帮助正畸医生准确估计治疗时间。
本病例对照研究纳入了 400 名 9 至 18 岁的患者。短治疗时间为 20 个月或更短，长治疗时间为 30 个月或更长。潜在的治疗前解释变量包括计划治疗、社会人口学、行为、牙齿、骨骼和软组织特征。采用单变量和多变量逻辑回归模型，通过报告未经调整的优势比（ORcrude）、调整后的优势比（ORadj）和 95%置信区间（CI），量化患者特征与治疗时间之间的关联。
计划非拔牙（ORadj=2.3；95%CI，1.3-4.2）、无乳牙（ORadj=3.0；95%CI，1.5-5.9）、覆合小于 80%（ORadj=2.4；95%CI，1.3-4.4）、上颌拥挤小于 6mm（ORadj=3.6；95%CI，1.7-7.7）和口腔卫生良好（ORadj=3.2；95%CI，1.3-1.8）的患者接受短治疗的可能性增加 2 至 3 倍。下颌面高降低（ORadj=3.4；95%CI，1.6-7.1）、拔牙（ORadj=1.8；95%CI，1.0-3.2）、乳牙（ORadj=1.9；95%CI，1.0-3.4）、不良等级（ORadj=2.0；95%CI，1.1-3.8）、过度覆合（ORadj=2.3；95%CI，1.4-3.8）、80%或更多覆合（ORadj=2.0；95%CI，1.2-3.6）和上颌拥挤 6mm 或以上（ORadj=2.6；95%CI，1.4-4.6）的患者接受长治疗的可能性增加 2 至 3 倍。
上颌拥挤、乳牙、80%覆合和拔牙的有无与短治疗和长治疗时间呈一致、相反和独立的关系。
