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Vertical Control and Reduction of a Functional Mandibular Shift in Severe Class III Malocclusion With Unilateral
Yiming Xu1,2,3, Wenqi Deng1,2,3, Jiaxin Yu1,2,3
1The Affiliated Stomatological Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, China.
Abstract:
Severe skeletal Class III malocclusion in repaired cleft lip and palate (CLP) may include fixed maxillary deficiency and a functional mandibular shift. A 15-year-old girl with unilateral complete CLP underwent staged nonsurgical treatment using posterior bite blocks, maxillary alignment, mandibular second-premolar extraction, and sequential unilateral posterior vertical elastics. Positive overjet and overbite, Class I posterior relationships, and profile improvement were achieved, while ANB changed only from -5.67° to -5.15°. The result represents dentoalveolar and functional camouflage, not skeletal correction. At 12 months, clinical examination and photographs showed short-term occlusal maintenance; no quantitative or radiographic retention measurements were obtained.
