Juneja Pankaj, Shivaprakash G, Chopra S S, Kambalyal P B
Graded Specialist (Orthodontics), Military Dental Centre, Secunderabad, India.
Professor and Head (Orthodontics), College of Dental Sciences, Davangere, Karnataka, India.
Med J Armed Forces India. 2015 Dec;71(Suppl 2):S362-8. doi: 10.1016/j.mjafi.2014.01.006. Epub 2014 Apr 3.
Although a number of studies have been undertaken to evaluate the friction characteristics of self-ligating brackets, there have been only few studies which have actually evaluated the clinical efficiency of these self-ligating brackets. This study was done to evaluate the clinical efficiency of Passive SLB (Smart Clip) in terms of anchorage loss and total treatment duration by comparing it with a Conventional pre-adjusted edgewise (M.B.T.) bracket system.
This was a retrospective study in which the study sample comprised of ten patients treated with Passive SLB (Smart Clip, 0.022″) and ten patients treated with Conventional pre-adjusted edgewise (M.B.T.) bracket system (0.022″) who required therapeutic extraction of U/L first premolars as a part of their orthodontic treatment plan. Pretreatment and post treatment lateral cephalograms were taken to evaluate the amount of anchorage loss. The total time required to complete the treatment was also recorded.
Anchorage loss observed with Passive SLB (Smart Clip) sagittally was 1.90 ± 0.68 mm in the maxilla and 1.90 ± 0.43 mm in the mandible and vertically was 0.52 ± 0.53 mm in the maxilla and 0.70 ± 0.69 mm in the mandible. Anchorage loss observed with Conventional pre-adjusted edgewise (M.B.T.) bracket system sagittally was 2.08 ± 0.43 mm in the maxilla and 1.95 ± 0.44 mm in the mandible and vertically was 0.50 ± 0.49 mm in the maxilla and 0.68 ± 0.53 mm in the mandible. The average time taken for the completion of treatment in Passive SLB (Smart Clip) and Conventional pre-adjusted edgewise (M.B.T.) bracket system was 14.0 ± 2.4 and 17.2 ± 2.6 months respectively.
There was no statistically significant difference in the quantum of anchor loss between Smart Clip self-ligating bracket system and Conventional pre-adjusted edgewise (M.B.T.) bracket system although Smart Clip self-ligating bracket system is efficient in reducing the overall treatment time.
尽管已经开展了多项研究来评估自锁托槽的摩擦特性，但实际评估这些自锁托槽临床效率的研究却很少。本研究旨在通过将被动自锁托槽（Smart Clip）与传统预成直丝弓（M.B.T.）托槽系统进行比较，从支抗丧失和总治疗时间方面评估被动自锁托槽（Smart Clip）的临床效率。
这是一项回顾性研究，研究样本包括10例接受被动自锁托槽（Smart Clip，0.022英寸）治疗的患者和10例接受传统预成直丝弓（M.B.T.）托槽系统（0.022英寸）治疗的患者，这些患者作为正畸治疗计划的一部分需要拔除上颌/下颌第一前磨牙进行治疗。治疗前和治疗后的头颅侧位片用于评估支抗丧失量。同时记录完成治疗所需的总时间。
被动自锁托槽（Smart Clip）矢状向上颌支抗丧失为1.90±0.68mm，下颌为1.90±0.43mm；垂直向上颌为0.52±0.53mm，下颌为0.70±0.69mm。传统预成直丝弓（M.B.T.）托槽系统矢状向上颌支抗丧失为2.08±0.43mm，下颌为1.95±0.44mm；垂直向上颌为0.50±0.49mm，下颌为0.68±0.53mm。被动自锁托槽（Smart Clip）和传统预成直丝弓（M.B.T.）托槽系统完成治疗的平均时间分别为14.0±2.4个月和17.2±2.6个月。
尽管Smart Clip自锁托槽系统在缩短总体治疗时间方面有效，但Smart Clip自锁托槽系统与传统预成直丝弓（M.B.T.）托槽系统在支抗丧失量上无统计学显著差异。
