Importance

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Abstract

The invention relates to a method for simulating an orthognathic operation, wherein, to simulate the displacement of the upper dental arch 105 of the patient caused by the surgical intervention to be applied to the maxilla 106 during said orthognathic surgery, the angular and translational position of an upper mounting plate 526 of a 3-D orthognathic surgery simulator 510 carrying a model 317 of said upper dental arch 105 is readjusted by rotating said upper mounting plate 526 around at least two, preferably three of three orthogonal axes X1Y and Z with respect to a rotation point 522 fixed to an arm 521 of said 3-D orthognathic surgery simulator 510, and translating said arm 521 substantially parallel to at least one of the same three orthogonal axes X, Y, Z. The invention also relates to a device 610 for determining an angle and position of the upper dental arch 105 with respect to a skull reference frame, which device comprises a cranial anchoring section 611, a first calibrated rod 612, an articulated member 613 for coupling said cranial anchoring section 611 to said first calibrated rod 612 and coupling means 614 for releasably locking said first calibrated rod 612 and a first or second teeth indexing member 405 at a fixed angle and position. The invention also relates to a method of using said device 610 for checking an upper dental arch 105 adjustment from an initial to a desired position and angle with respect to the skull 111.

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First Claim