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ملفات تعريف الارتباط المستخدمة
牙齒為什麼會擁擠?牙列擁擠是錯畸形最為常見的形式之一,也是患者尋求正畸治療最常見的原因,大約占60%~70%的患者。造成牙列擁擠的原因為牙量、骨量不調,牙量相對大,骨量相對小,牙弓長度不足以容納牙弓上的全數牙齒。牙量、骨量不調受遺傳與環境兩方面的影響。
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