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Rapid Maxillary Alveolar Expansion In Maxillary Severe Space Deficiency, Mei-Yin Chen, Wen-Ken Tai, Heng-Ming Mark Chang, Hoi-Shing Luk, Chia-Tze Kao

Taiwanese Journal of Orthodontics

Although maxillary skeletal palatal expansion was efficient to correct the transverse dental deficiency, the conventional maxillary palatal expansion is still effective in some cases. This case report describes the orthodontic treatment procedure of a 15-year-old female patient who was diagnosed as Angle’s Class I malocclusion with severe space deficiency. The space deficiency of 11 mm was noted in maxillary arch in conjunction with severe overjet, blocked-in lateral incisors, high maxillary vault, posterior crossbite and V shape arch-form. The treatment plan presented non-extraction with rapid maxillary alveolar expansion in upper arch. The Hyrax expander was used in a rhythm of 2 …