正畸用镍钛弓丝研究进展的系统性综述.

BACKGROUND: During orthodontic treatment, the arch wire is an important part of the fixed appliance. The choice of arch wire largely determines the efficiency of tooth alignment. Among them, nickel-titanium alloys are widely used in fixed orthodontics due to their superelasticity and shape memory effect, and have become a research hotspot. OBJECTIVE: To review the development history and research progress of nickel titanium arch wires. METHODS: The literature search was performed in PubMed, Web of Science and CNKI databases. The Chinese and English keywords were “orthodontics, NiTi”. The articles were screened according to the inclusion and exclusion criteria. Finally, 77 articles were included for review. RESULTS AND CONCLUSION: Many scholars did researches to overcome the drawbacks of the NiTi arch wire, such as improving the composition, manufacturing process and surface modification. However, the current finished nickel-titanium arch wires still have various drawbacks, such as poor aesthetic properties of the arch wires; the release of nickel ions may cause allergic reactions, and the aesthetic coating is easy to fall off. Although there are commercial products of NiTi arch wire and are widely used in clinical orthodontic treatment, due to the complexity of orthodontic process, and many researchers are still in the laboratory stage; there is no ideal NiTi arch wire to meet the needs of all aspects of orthodontic clinical treatment. The improvement of various types of NiTi arch wire is an important supplement and development to the existing NiTi arch wire, and is expected to play a huge role in clinical applications in the future. [ABSTRACT FROM AUTHOR]