Journal of Prevention and Treatment for Stomatological Diseases ›› 2019, Vol. 27 ›› Issue (2): 122-126.DOI: 10.12016/j.issn.2096-1456.2019.02.011

• Review Articles • Previous Articles     Next Articles

Research Progress on regarding the torque control of upper anterior teeth with a lip appliance

YANG Pingzhu,WEN Xiujie()   

  1. Department of Stomatology, Daping Hospital, Army Military Medical University, Chongqing 400042, China
  • Received:2018-02-08 Revised:2018-03-28 Online:2019-02-20 Published:2019-02-21
  • Contact: Xiujie WEN

唇侧矫治器控制上前牙转矩的研究进展

杨苹珠,温秀杰()   

  1. 陆军军医大学大坪医院口腔科,重庆(400042)
  • 通讯作者: 温秀杰
  • 作者简介:杨苹珠,在读硕士研究生,Email: 343531361@qq.com
  • 基金资助:
    国家自然科学基金面上项目(81470032);军事口腔医学国家重点实验室开放课题(2014KB14)

Abstract:

The normal torque angle of the maxillary anterior teeth is an important factor in the aesthetics and function of the anterior teeth, and torque control of the front teeth is an extremely important aspect of the correction process. At present, the normal torque angle of the front teeth is among the phase Ⅲ clinical test items recognized by the American orthodontic professional committee; consequently, good control of front teeth torque is of great significance to the aesthetics of the upper anterior teeth. In this paper, the influence of a lip appliance on the bad torque of upper anterior teeth and the associated methods of control are reviewed in detail. The advantages and disadvantages of various control methods for the anterior teeth and the significance of correct anterior teeth torque angle are summarized. The existing research results indicate that the torsion of a straight arch wire applied directly to individual teeth is too great, making it difficult to enter the groove. Although the bending of the arch wire overcomes these shortcomings, the procedure is cumbersome; it stimulates the soft tissue of the vestibular groove and increases the patient’s discomfort. The bending mechanism of the rocking chair is more complicated; it is greatly affected by the friction between the arch wire and the bracket and is not conducive to closing the tooth extraction gap using the sliding method. The portal auxiliary arch and the single bending torque are suitable for correcting the torque angle of a single tooth. Auxiliary arch torque can be used to correct the upright upper anterior teeth during the process of closing the extraction space and after adduction; therefore, this procedure is worth popularizing. However, the accuracy of orthodontic control of anterior teeth torque requires further study.

Key words: Aesthetic, Function, Anterior teeth torque, Control factors, Torque control, Labial orthodontics

摘要:

上颌前牙正常的转矩角度是评价前牙美观性和功能性的重要因素,上前牙的转矩控制是矫治过程中极为重要的环节。目前,上前牙正常的转矩角度已经成为美国正畸专业委员会认定的Ⅲ期临床检测项目之一,所以控制良好的转矩对上前牙的美观具有重要意义。本文就唇侧矫治器对上前牙转矩不良的影响及控制方式详细概况,对于多种控制前牙转矩方式的利弊及正确的前牙转矩角度的意义研究现状作一综述。通过现有的研究结果发现,平直弓丝上直接对个别牙加转矩则因弓丝扭曲过大,入槽困难;弓丝上弯制曲虽然克服了上述缺点,但操作繁琐,且可能对前庭沟软组织造成刺激,增加患者不适;摇椅弓作用力系统较复杂,受弓丝与托槽间摩擦力影响较大,不利于使用滑动法关闭拔牙间隙;门形辅弓及单曲转矩簧适用于纠正单颗牙的转矩角度,转矩辅弓可用于纠正关闭拔牙间隙过程中以及内收完成后的上前牙直立,所以值得推广,但对于矫正器控制前牙转矩的精确性还有待于进一步的研究。

关键词: 美观, 功能, 前牙转矩, 控制因素, 转矩控制, 唇侧矫治

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