Gunay Firdevs, Oz Abdullah Alper
Department of Orthodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey.
Department of Orthodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey.
Am J Orthod Dentofacial Orthop. 2018 Feb;153(2):232-238. doi: 10.1016/j.ajodo.2017.06.019.
The aim of this study was to evaluate and compare the clinical success of 2 lingual retainer wires.
The 120 patients included in the study were divided into 2 groups randomly. In group 1, 0.0175-in 6-strand stainless steel wire (Ortho Technology, Lutz, Fla) was used, the lingual retainers were fabricated on plaster models, and a silicon transfer key was used. In group 2, 0.0195-in dead-soft coaxial wire (Respond; Ormco, Orange, Calif) was used, and the lingual retainers were fabricated directly in the patient's mandibular arch without a study model. Pretreatment, posttreatment, and posttreatment 3-month, 6-month, 9-month, and 12-month 3-dimensional orthodontic models were evaluated. Failure rates, mandibular arch irregularity values, intercanine distances, and arch lengths were compared.
The clinical bond failure rates were 13.2% for the 0.0175-in 6-strand stainless steel wire and 18.9% for the 0.0195-in dead-soft wire. The difference in bond failures between the 2 groups was not statistically significant. There was a statistically significant increase in mandibular arch irregularity in both groups during the 12-month follow-up. However, the increase was significantly higher in the second group than in the first one. Furthermore, the intercanine distance decreased over time in the second group.
Our findings regarding mandibular arch measurements indicate that fabrication of lingual retainers can be more safely accomplished with 0.0175-in 6-strand stainless steel wire than with 0.0195-in dead-soft coaxial wire.
本研究旨在评估和比较两种舌侧保持丝的临床成功率。
本研究纳入的120例患者被随机分为两组。第1组使用0.0175英寸的6股不锈钢丝（Ortho Technology，卢茨，佛罗里达州），舌侧保持器在石膏模型上制作，并使用硅转移键。第2组使用0.0195英寸的特软同轴丝（Respond；奥美科，奥兰治，加利福尼亚州），舌侧保持器直接在患者下颌牙弓上制作，无需研究模型。对治疗前、治疗后以及治疗后3个月、6个月、9个月和12个月的三维正畸模型进行评估。比较失败率、下颌牙弓不规则值、尖牙间距离和牙弓长度。
0.0175英寸的6股不锈钢丝的临床粘结失败率为13.2%，0.0195英寸的特软丝为18.9%。两组之间粘结失败的差异无统计学意义。在12个月的随访期间，两组下颌牙弓不规则度均有统计学意义的增加。然而，第二组的增加明显高于第一组。此外，第二组的尖牙间距离随时间减小。
我们关于下颌牙弓测量的研究结果表明，与0.0195英寸的特软同轴丝相比，使用0.0175英寸的6股不锈钢丝制作舌侧保持器可能更安全。
