Maulana Azad Institute of Dental Sciences, Department of Orthodontics and Dentofacial Orthopaedics, Bahadur Shah Zafar Marg, 110002 New Delhi, India.
Maulana Azad Institute of Dental Sciences, Department of Orthodontics and Dentofacial Orthopaedics, Bahadur Shah Zafar Marg, 110002 New Delhi, India.
Int Orthod. 2020 Dec;18(4):827-838. doi: 10.1016/j.ortho.2020.06.001. Epub 2020 Jul 10.
The treatment of Skeletal Class III malocclusion continues to be considered as one of the biggest challenges in orthodontics as the success of its correction is largely unpredictable. Early diagnosis and treatment are highly recommended to eliminate primary etiological factors and prevent an increase in severity of the existing malocclusion. However, if the diagnosis is delayed until adulthood, treatment becomes restricted to orthognathic surgery due to limited or no remaining growth potential left. The inherent risks involved with the surgical procedures often preclude the patients from opting for it, thus leaving the orthodontist with no option but to perform possible compensatory treatments to improve facial aesthetics and restore functional occlusion.
To report the case of a 15-year old boy (adolescent) with Skeletal Class III malocclusion, a concave facial profile with an anterior crossbite and no incisor visibility during smile.
Intra-oral skeletally anchored maxillary protraction (I-SAMP) and mini-implants associated with fixed appliance to aid in the correction of the skeletal bases and subsequently relieve the dental crowding.
After 36 months of treatment, functional normal occlusion with a Class I molar and canine relation was achieved. The consequential increase in upper lip thickness and decrease in lower lip fullness alongwith an increased exposure of maxillary incisors during smile resulted in a significant improvement of the patient's facial profile and an aesthetically pleasing smile.
骨性 III 类错颌的治疗一直被认为是正畸领域最大的挑战之一,因为其矫正效果在很大程度上是不可预测的。早期诊断和治疗被强烈推荐,以消除主要病因,并防止现有错颌的严重程度增加。然而,如果诊断延迟到成年期,由于剩余生长潜力有限或不存在,治疗将仅限于正颌手术。手术相关的固有风险常常使患者无法选择手术,因此,正畸医生别无选择,只能进行可能的补偿治疗,以改善面部美观和恢复功能咬合。
报告一例 15 岁男孩(青少年)的骨性 III 类错颌,表现为凹面型,前牙反颌,微笑时可见前牙。
口内支抗上颌骨前牵引(I-SAMP)和微型种植体联合固定矫治器,辅助矫正骨骼基础,并随后缓解牙齿拥挤。
经过 36 个月的治疗,实现了功能正常的咬合,磨牙和尖牙呈 I 类关系。上唇厚度的增加和下唇丰满度的减少,以及上颌切牙在微笑时的暴露增加,导致患者的面部轮廓和美观的笑容得到显著改善。