Facial Asymmetry, Temporomandibular Joint Ankylosis
Conditions
Keywords
Virtual mandibular position; temporomandibular joint reconstruction; Jaw deformity;Costochondral graft
Brief summary
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.
Interventions
PROCEDUREtemporomandibular jont reconstruction with costochondral transplantation
temporomandibular jont reconstruction with costochondral transplantation guided by virtual mandibular position
Sponsors
Peking University
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
6 Years to 12 Years
Healthy volunteers
No
Inclusion criteria
* \<12 years old * Unilateral temporomandibular joint ankylosis or condyle absence； * Temporomandibular joint reconstructed with costochondral graft；
Exclusion criteria
* Bilateral temporomandibular joint ankylosis or condyle absence * Combined with systematic disease
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Bilateral ramus height,chin deviation,maxilla height | preoperation | Bilateral ramus height,chin deviation,maxilla height in millimeter. These measurements were accomplished by ProPlan 2.0( SynthesProPlan，Materialise，Belgium） |
| Bilateral ramus height,chin deviation,maxilla height 6 months after operation | 6 months after operation | Bilateral ramus height,chin deviation,maxilla height in millimeter 6 months after operation. These measurements were accomplished by ProPlan 2.0( SynthesProPlan，Materialise，Belgium） |
| Bilateral ramus height,chin deviation,maxilla height 12 months after operation. | 12 months after operation | Bilateral ramus height,chin deviation,maxilla height in millimeter 12 months after operation.These measurements were accomplished by ProPlan 2.0( SynthesProPlan，Materialise，Belgium） |
Countries
China
Contacts
Primary ContactShuo Chen, MD
Outcome results
None listed