Sarangal Heena, Namdev Ritu, Garg Swati, Saini Natasha, Singhal Parul
Department of Pediatric Dentistry, Postgraduate Institute of Dental Sciences, Rohtak, Haryana, India.
Contemp Clin Dent. 2020 Jan-Mar;11(1):91-96. doi: 10.4103/ccd.ccd_393_19. Epub 2020 Jul 13.
The characteristic features of Class III malocclusion are present at an early age, usually between 3 and 5 years of age. If left untreated, the Class III malocclusion or severe anterior crossbite may worsen, with the majority of these patients ultimately requiring orthognathic surgery as adults. The treatment in all developing Class III cases should be undertaken as soon as the abnormality is diagnosed to prevent it from becoming permanent and resulting in a full-blown Class III malocclusion. It provides more pleasing facial esthetics (the lip posture and facial appearance), thus improving the psychosocial development of a child. Various treatment options available for the management of developing Class III malocclusion are as follows: (1) functional appliances such as reverse twin block, Frankel appliance, and the removable mandibular retractor; (2) orthopedic appliances such as chin cap and face mask; and (3) orthodontic appliances, namely removable maxillary expansion plate or fixed orthodontic appliance with expanded upper arch wire. A treatment plan may be chosen depending on the amount of maxillary growth restriction, mandibular plane angle, the soft-tissue profile, and the age of the patient. This article discusses the various treatment options and the decision-making for different clinical cases based on the clinical features with a description of four different treatment approaches.
III类错颌畸形的特征在早期就已出现,通常在3至5岁之间。如果不进行治疗,III类错颌畸形或严重的前牙反牙合可能会恶化,这些患者中的大多数最终成年后需要进行正颌手术。所有正在发展的III类病例一旦诊断出异常就应立即进行治疗,以防止其变为永久性并导致严重的III类错颌畸形。它能提供更令人满意的面部美学效果(唇部姿势和面部外观),从而改善儿童的心理社会发育。用于治疗正在发展的III类错颌畸形的各种治疗选择如下:(1)功能性矫治器,如反式双阻板矫治器、Frankel矫治器和可摘式下颌后缩器;(2)矫形矫治器,如下颌帽和面罩;(3)正畸矫治器,即可摘式上颌扩弓板或带有扩弓上颌弓丝的固定正畸矫治器。可根据上颌生长受限的程度、下颌平面角、软组织侧貌和患者年龄选择治疗方案。本文讨论了各种治疗选择以及基于临床特征针对不同临床病例的决策,并描述了四种不同的治疗方法。