Almuzian Mohammed, Alharbi Fahad, McIntyre Grant
Dent Update. 2016 Jan-Feb;43(1):74-6, 79-82. doi: 10.12968/denu.2016.43.1.74.
Extra-oral appliances are used in orthodontics to apply forces to the jaws, dentition or both and the popularity of these appliances is cyclical. Although the use of retraction headgear for the management of Class II malocclusion has declined over the last 20 years with the refinement of non-compliance approaches, including temporary anchorage devices, headgear still has a useful role in orthodontics. The use of protraction headgear has increased as more evidence of its effectiveness for the treatment of Class lIl malocclusion has become available. This paper describes the mechanics and contemporary uses of headgear in orthodontics for primary care dentists and specialist orthodontists. CPD/CLINICAL RELEVANCE: Extra-oral appliances have specific uses in orthodontic biomechanics. Clinicians using retraction headgear and protraction headgear should be familiar with their clinical indications, the potential problems and how these can be avoided.
口外矫治器在正畸治疗中用于对颌骨、牙列或两者施加力，并且这些矫治器的受欢迎程度呈周期性变化。尽管在过去20年中，随着包括临时支抗装置在内的非依从性方法的改进，用于治疗II类错牙合的后缩头帽的使用有所减少，但头帽在正畸治疗中仍具有重要作用。随着越来越多的证据表明前牵引头帽对治疗III类错牙合有效，其使用有所增加。本文为基层牙医和正畸专科医生描述了头帽在正畸治疗中的力学原理和当代应用。继续职业发展/临床相关性：口外矫治器在正畸生物力学中有特定用途。使用后缩头帽和前牵引头帽的临床医生应熟悉其临床适应证、潜在问题以及如何避免这些问题。
