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目的:研究改良唇挡单侧扩弓后牙齿及牙槽骨的变化。方法:20例单侧完全性唇腭裂患者应用改良唇挡进行单侧扩弓,扩弓前后分别进行CBCT扫描重建,测量裂隙侧牙齿及牙槽骨的变化并进行统计学分析。结果:1未经扩弓治疗的单侧完全性唇腭裂隙患者裂侧尖牙和前磨牙相对于健侧均表现为舌倾,其中尖牙舌倾最明显;2牙及牙槽骨均发生颊倾;颊侧牙槽骨倾斜度大于腭侧,变化量与牙齿的颊倾程度呈正相关性;3根尖基骨宽度增加。结论:唇挡扩弓后牙槽骨随牙齿的颊倾发生适应性改建,同时唇挡刺激牵引牙根尖基骨的改建,在适应症范围内唇挡扩弓是安全有效的。
OBJECTIVE: To study the changes of teeth and alveolar bone after unilateral expansion of modified lip. Methods: Twenty patients with unilateral complete cleft lip and palate with unilateral expansion were treated with modified lip pad. CBCT reconstruction was performed before and after expansion. The changes of cleft side teeth and alveolar bone were measured and statistically analyzed. Results: 1 unilateral left flank cleft palate fissured canine anterior teeth and premolar relative to the healthy side of the performance of the tongue tilt, including the canine tongue tilt the most obvious; 2 teeth and alveolar bone occurred Buccal tilt; buccal alveolar bone inclination greater than the palatal side, the amount of change and the degree of tooth cheek was positively correlated; three apical bone width increased. CONCLUSION: Alveolar bone after lip augmentation is adaptively modified with the buccal incisor of the tooth, while the lip shield stimulates the remodeling of the apical base bone. It is safe and effective to extend the lip in the indication range.