The invention relates to application of a
digitization technology to oral approach mandibular condylar
lesion surgical excision. The application comprises the following steps: planting five self-tapping
titanium screws into a mandible of a patient to be used as registration mark points of a
navigation system in a
surgery; photographing maxillofacial region CT (
Computed Tomography) scanning and storing in a
DICOM (
Digital Imaging and Communications in
Medicine) format; establishing a patient
lesion three-dimension pattern; designing an
osteotomy face and an
osteotomy range according to a
lesion boundary; introducing navigation
software in an STL (
Standard Template Library) format to reestablish a three-dimensional geometrical model; mounting a navigation
reference frame, and registering by using a navigation positioning probe and the mark points; setting an incision and dissecting and separating a
joint capsule under an
endoscope view to
expose a condylar process; searching an
osteotomy face position by using the positioning probe and calibrating a coordinate of a bone saw; adjusting the bone saw to the position of the osteotomy face and the
cutting angle; and under the guidance of the incision stretched
endoscope probe and a navigation positioning image, carrying out condylar osteotomy by holding the bone saw via a
surgery doctor. By the aid of the application, the
surgery doctor can accurately
cut off condylar tumors according to preoperative plans, so the ideals of minimally
invasive surgery and accurate surgery are uniformed.