口腔医学研究 ›› 2026, Vol. 42 ›› Issue (1): 59-63.DOI: 10.13701/j.cnki.kqyxyj.2026.01.011

• 口腔正畸学研究 • 上一篇    下一篇

新型超细正畸镍钛方丝和常规镍钛圆丝的机械性能对比研究

吉利1*, 钟庭进2, 宋文璐2, 陈子炀2, 韩玉2   

  1. 1.中山大学附属第一医院口腔科 广东 广州 510080;
    2.广东省口腔正畸工程技术研究中心 广东 广州 510080
  • 收稿日期:2025-05-13 出版日期:2026-01-28 发布日期:2026-01-23
  • 通讯作者: *吉利,E-mail:orthodentist_jili@163.com
  • 作者简介:吉利(1978~ ),男,湖北荆州人,硕士,副主任医师,研究方向:口颅颌面正畸学。
  • 基金资助:
    教育部产学合作协同育人项目(240701316220512);数字化精准口腔正畸技术课程建设与临床研究(220901316063638);舒适化正畸课程建设与临床研究(220801316245152);舒适化口腔正畸临床新技术师资培训;广州市创新创业领军人才项目(编号:2021-L004)

Comparative Study on Mechanical Properties of Novel Ultra-Fine Ni-Ti Rectangular Archwires and Conventional Ni-Ti Round Wires in Orthodontics

JI Li1*, ZHONG Tingjin2, SONG Wenlu2, CHEN Ziyang2, HAN Yu2   

  1. 1. Department of Stomatology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China;
    2. Guangdong Engineering Technology Research Center for Orthodontic, Guangzhou 510080, China
  • Received:2025-05-13 Online:2026-01-28 Published:2026-01-23

摘要: 目的: 在模拟口腔温度下,对比研究新型超细镍钛方丝和传统镍钛圆丝力学性能的差异。方法: 选取3种不同尺寸(OO1号SE:0.006×0.025英寸;OO2号SE:0.008×0.023英寸;OO3号SE:0.010×0.022英寸)的新型镍钛方丝和4个不同品牌(3M、PT、XY、LS)的5种超细镍钛圆丝(直径范围0.012~0.016英寸),在37 ℃水浴条件下,在材料试验机上进行三点弯曲试验,以评估上述8种弓丝在平均卸载力、平台期长度、应力滞后值等力学性能方面的差异。结果: OO1号SE方丝的平均卸载力最低(0.40±0.02) N,显著低于其他品牌的镍钛圆丝(3M、PT、XY、LS,P<0.0001)。OO3种新型镍钛方丝的应力滞后值随弓丝尺寸增大而增大,但均低于其他品牌的超弹性/热激活圆丝。结论: 新型镍钛方丝能产生与镍钛圆丝同样柔和且稳定的矫治力,同时可以实现早期转矩控制,将其应用于早期正畸治疗,有望减少换丝次数并降低治疗成本。

关键词: 正畸, 镍钛方丝, 镍钛圆丝, 超弹性弓丝, 热激活弓丝

Abstract: Objective: To conduct a comparative study on the mechanical properties of novel ultrafine nickel-titanium rectangular wires and conventional nickel-titanium (NiTi) round wires under simulated oral temperature conditions. Methods: Three types of novel ultrafine NiTi rectangular wires (OO, Size 1: 0.006×0.025 inches; Size 2: 0.008 × 0.023 inches; Size 3: 0.010×0.022 inches) and five ultrafine NiTi round wires Diameter of (0.012-0.016 inches) from four brands (3M, PT, XY, LS) were selected. A three-point bending test was performed using an universal testing machine at 37 ℃ water bath conditions to evaluate differences in mechanical properties, including average unloading force, platform length, and stress hysteresis values. Results: The OO size 1 rectangular archwire exhibited the lowest mean unloading force (0.40±0.02 N), which was significantly lower than that of all other brands of NiTi round wires (3M, PT, XY, LS; P<0.0001). The stress hysteresis values increased with increasing archwire dimensions in OO rectangular wires, but remained lower than those of superelastic/heat-activated round wires from other brands. Conclusion: Novel ultrafine NiTi rectangular wires provide clinically equivalent light and stable orthodontic forces, comparable to those of conventional NiTi round wires, while enabling early torque control. Their application in initial alignment phases may reduce the frequency of wire changes and lower treatment costs compared to conventional round wire protocols.

Key words: orthodontics, NiTi square wire, NiTi round wire, superelastic (SE) archwire, heat activated (HA) archwire