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本研究以４１名１１—１６岁开牙合少年作为研究对象，通过三维头影测量系统，与同年龄段正常牙合采用同一技术所得的测量均值进行比较，得出以下结论：①前牙开牙合是一种多因素所致的错牙合畸形，在长、宽、高三度方向上都有体现。②长度方向上看，下颌向后、下方旋转、移位，上颌前部上翘。③宽度方向上看，面宽度显著减小，上、下牙弓明显狭窄，可致呼吸道不畅，舌被动前伸。④高度方向上看，前全面高、前下面高明显增大，上后牙－齿槽高明显增加，下前牙－齿槽高明显减小。
In this study, 41 adolescents aged 11-16 years old were selected as the research objects. The three-dimensional cephalometric system was used to compare with the average measurements of the same age with normal occlusion. The following conclusions were drawn: ① anterior teeth open Occlusal occlusion is a multifactorial malocclusion deformity that manifests itself in long, wide and high third-degree directions. ② the length of the direction of view, the mandibular backward, below the rotation, displacement, the upper jaw upturned. ③ width direction, the surface width was significantly reduced, the upper and lower arch obvious stenosis, can cause poor respiratory tract, passive extension of the tongue. ④ In the height direction, the height of the front face was significantly higher than that of the front face, and the height of the upper back teeth - the height of the tooth groove was obviously increased. The height of the lower front tooth and the tooth groove was obviously reduced.