Sagittal interferences result from anterior overjet, linguoversion of the maxillary incisors, anterior crossbite, and molar prematurities or other occlusal interferences with lateral or protrusive excursive movements( Figs3-5 and3-6).

• 矢状面干扰会产生前牙区过度水平覆盖、颚侧门齿之舌侧倾斜、牙错咬、臼齿早熟或其他在侧方或前突的离心运动时的咬合干扰，图3-5与3-6。。