Jeremiah Huw G, Cousley Richard R, Newton Tim, Abela Stefan
Addenbrooke's Hospital, Cambridge, UK.
J Orthod. 2012 Sep;39(3):206-11. doi: 10.1179/1465312512Z.00000000027.
To evaluate the process of combined orthognathic and orthodontic care. To identify factors that affect treatment time and percentage Peer Assessment Rating (PAR) reduction, and the PAR efficiency factor for such cases.
Retrospective multi centre study of patients who underwent orthognathic treatment in the East of England region.
Analysis of consecutive cases that underwent orthognathic surgery in 2008. Inclusion criteria included pre- and post-surgery orthodontic treatment.
Ten orthodontic units submitted data for a total of 118 patients. Within the sample, 64% were class III, 35% class II/1 and 1% class II/2. Overall extraction rate, excluding third molars, was 58%. Median age at bond up was 17 years. Mean total number of orthodontic attendances was 23. Median length of pre-surgical orthodontics was 23 months and post-surgical orthodontics was 7 months. Median length of total treatment was 29 months. Mean wait for surgery was 3·6 months. Diagnosis of incisor relationship and skeletal base, transfer of operator, total number of visits, tooth extraction and treatment unit affected treatment duration. Median pre- and post-treatment PAR scores were 43 and 4, respectively. Median change in PAR score was 38·5. Median per cent reduction in PAR was 90·6%. The median PAR efficiency factor (reduction in PAR score divided by treatment time in months) was 1·24. Diagnosis of incisor relationship and skeletal base correlated with percentage reduction in PAR score.
Combined orthognathic treatment was effective. Factors affecting treatment duration and percentage reduction in PAR have been established.
评估正颌与正畸联合治疗的过程。确定影响治疗时间和同伴评估评分（PAR）降低百分比的因素，以及此类病例的PAR效率因子。
对在英格兰东部地区接受正颌治疗的患者进行回顾性多中心研究。
分析2008年接受正颌手术的连续病例。纳入标准包括术前和术后正畸治疗。
10个正畸科室提交了共118例患者的数据。样本中，64%为III类错颌，35%为II/1类错颌，1%为II/2类错颌。不包括第三磨牙的总体拔牙率为58%。粘结矫治器时的中位年龄为17岁。正畸就诊的平均总次数为23次。术前正畸的中位时长为23个月，术后正畸为7个月。总治疗的中位时长为29个月。手术的平均等待时间为3.6个月。切牙关系和骨骼基底的诊断、操作人员的更换、就诊总次数、拔牙情况和治疗科室影响治疗时长。治疗前和治疗后的PAR评分中位数分别为43和4。PAR评分的中位变化为38.5。PAR降低的中位百分比为90.6%。PAR效率因子中位数（PAR评分降低值除以治疗月数）为1.24。切牙关系和骨骼基底的诊断与PAR评分降低百分比相关。
正颌联合治疗有效。已确定影响治疗时长和PAR降低百分比的因素。
