Fig. 6

Maximum principal stress distribution on the glenoid fossa. (The white circled area refers to the posterior aspect of the glenoid fossa) A In mandibular postural position, the posterior aspect of the glenoid fossa experienced mild tensile stress. B In mandibular advancement with AMS, the tensile stress became more significant and extensive. C In mandibular advancement without AMS, the stress distribution was similar to that with AMS