Thakur Sanika M, Shenoy Usha, Hazare Ananya, Karia Himija, Khorgade Pritam R, Nandeshwar Nivedita, Bhattacharya Sangeeta
Orthodontics and Dentofacial Orthopedics, Ranjeet Deshmukh Dental College and Research Centre, Nagpur, IND.
Cureus. 2024 Sep 10;16(9):e69110. doi: 10.7759/cureus.69110. eCollection 2024 Sep.
Canine retraction is critical in orthodontic treatment, requiring precise force application. Elastomeric chains and active tiebacks are commonly used materials, but their efficacy in maintaining the force over time needs further evaluation. The study aimed to compare the rate of force degradation of elastomeric chains vs. active tiebacks during canine retraction over a duration of six weeks in patients undergoing fixed orthodontic therapy.
This study involved 20 patients, aged between 16 and 25 years. All the subjects were treated with the 0.018" McLaughlin-Bennett-Trevisi (MBT) prescription. Following the initial leveling and alignment, the canines were retracted on 0.016 x 0.022" stainless steel wire, using an elastomeric chain (ORMCO) on one side and an active tieback (ORMCO) on the contralateral side, each exerting a force of 150 g. Force values were measured using a tension gauge (TECLOCK; DT- 300) at intervals of 48 hours, two weeks, four weeks, and six weeks by a single observer and documented accordingly.
The elastomeric chain and active tieback sides demonstrated substantial force degradation over six weeks, with a marked reduction of force at given intervals. However, no statistically significant difference in force degradation rates was observed between the two methods (p > 0.05), indicating similar force degradation patterns.
The elastomeric chain and active tieback methods demonstrated substantial force degradation over six weeks, with no statistically significant difference between the two. Thus, both materials can be effectively utilized for canine retraction in orthodontic treatment as they exhibit similar patterns of force degradation.
犬齿后移在正畸治疗中至关重要，需要精确施加力。弹性链和主动牵引圈是常用材料，但它们在一段时间内维持力的效果需要进一步评估。本研究旨在比较接受固定正畸治疗的患者在六周时间内犬齿后移过程中弹性链与主动牵引圈的力衰减率。
本研究纳入了20名年龄在16至25岁之间的患者。所有受试者均采用0.018英寸的麦克劳林 - 贝内特 - 特雷维西（MBT）矫治方案。在初始排齐整平后，犬齿在0.016×0.022英寸的不锈钢丝上后移，一侧使用弹性链（奥美科），对侧使用主动牵引圈（奥美科），每种装置施加150克的力。由一名观察者每隔48小时、两周、四周和六周使用张力计（得乐时钟；DT - 300）测量力值，并相应记录。
弹性链侧和主动牵引圈侧在六周内均出现了显著的力衰减，在给定时间间隔内力明显降低。然而，两种方法在力衰减率上未观察到统计学上的显著差异（p>0.05），表明力衰减模式相似。
弹性链和主动牵引圈方法在六周内均出现了显著的力衰减，两者之间无统计学上的显著差异。因此，在正畸治疗中，这两种材料均可有效用于犬齿后移，因为它们表现出相似的力衰减模式。
