Shenzhen oral experts pointed out that the posterior anti jaw will affect the following points.

      1. Individual teeth after the close of chewing function and jaw impact is not big, but it may have a bad effect on the temporomandibular joint.

      2. Most posterior crossbite affect the function, the temporomandibular joint and maxillofacial development.

      3. The majority of unilateral posterior crossbite with anterior crossbite, resulting in facial asymmetry. Posterior crossbite teeth number more, the degree of more serious, the occlusive lock effect and the dysfunction of the masticatory is also greater, effect of development on the jaw bone and the joint is also greater.

      4. The majority of occlusal antimerger anterior crossbite before the maxillary deficiency, but also has a concave side face.

      5. Most bilateral posterior crossbite on dental arch and maxilla width and development is much restricted, narrow maxillary arch, facial expression is long and narrow, but symmetrical.

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