Ferros I, Mora M J, Obeso I F, Jimenez P, Martinez-Insua A
Stomatology, Facultad de Medicina y Odontología de Santiago de Compostela, Santiago de Compostela, Spain.
Private Practice, Malaga, Spain.
Orthod Craniofac Res. 2016 Nov;19(4):222-233. doi: 10.1111/ocr.12128. Epub 2016 Aug 10.
There is controversy regarding the relationship between mandibular position and alterations of the cranial base that provoke a more anterior location of the glenoid fossa. Artificially deformed skulls display marked alterations of the cranial base. This study evaluates mandibular changes as function of the morphology of the cranial base in these skulls.
A geometric morphometric study was performed on lateral cephalometric X-rays of three groups of skulls: 32 with anteroposterior deformity, 17 with circumferential deformity and 39 with no apparent deformity.
In artificially deformed skulls, the cranial base was deformed causing the mandibular condyle to be in a more anterior position. There was a complete remodelling of the mandible involving narrowing and elongation of the mandibular ramus, rotation of the corpus of the mandible and increased vertical height of the symphysis. Forward displacement did not occur. Integration between mandible and cranial base is not altered by deformation of the skull.
Deformity of the cranial vault exerts an influence on the mandible, supporting the theory of modular units in complete integration. This also supports the theory that mandibular prognathism is a multifactorial result and not a direct effect of displacement of the cranial base.
关于下颌位置与颅底改变之间的关系存在争议，颅底改变会导致关节窝位置更靠前。人工变形的颅骨显示出颅底的明显改变。本研究评估了这些颅骨中下颌变化作为颅底形态的函数。
对三组颅骨的头颅侧位X线片进行了几何形态测量研究：32例有前后位畸形，17例有周向畸形，39例无明显畸形。
在人工变形的颅骨中，颅底变形导致下颌髁突处于更靠前的位置。下颌骨发生了完全重塑，包括下颌升支变窄和延长、下颌体旋转以及联合部垂直高度增加。未发生向前移位。颅骨变形不会改变下颌骨与颅底之间的整合。
颅穹窿畸形对下颌骨有影响，支持了完全整合中模块化单元的理论。这也支持了下颌前突是多因素结果而非颅底移位直接作用的理论。
