Application of Virtual Mandibular Position in Temporomandibular Jont Reconstruction With Costochondral Graft in Children Jaw Deformity
Application of Virtual Mandibular Position in Temporomandibular Jont Reconstruction With Costochondral Graft in Children Jaw Deformity.
Hypothesis：Computer-aided design virtual mandibular position is feasible for costochondral
graft growing and occlusion stabilizing in the one-stage treatment of children
temporomandibular joint ankylosis (TMJA) or condyle absence with jaw deformity.
Methods: The inclusion criteria is children patients younger than 12 years old with
unilateral TMJA or condyle absence. A virtual mandibular position is designed preoperatively
according to the CT data of jaw and dentition. 3D printed templates and occlusal splints are
used to guide the costochondral graft and mandibular position. During surgery, the affected
ramus is reconstructed with costochondral grafting under the virtual mandibular position.
After surgery, the occlusal splint is fixed to maxilla at least one month, and then, replaced
by orthodontic functional appliance to promote downward growth of the maxilla. Occlusion,
facial symmetry, costochondral graft growing would be evaluated and analysed until adulthood.