Three Dimensional Finite Element Analysis Of Temporomandibular Joint Of Class ? Malocclusion In Adolescent With AdvanSync Appliance

Objective: Three dimensional finite element method analysis was used in stress analysis of the temporomandibular joint in patient under treatment of junior class II malocclusion with AdvanSync appliance to explore whether the temporomandibular joint has adaptive remodeling under localized stimulus.Methods: A 11 years old class II Division 1 malocclusion patient was selected as a volunteer in this research,CBCT was used in scanning the heads of patients.And the date was output as graphic data,data was established into three-dimensional finite element model of appliances maxilla mandible and dentition by mimics17.0 software.ANSYS workbench 15.0 software was used in three-dimensional model boundary and loading force valued 5.7N,and make the stress analysis of the temporomandibular joint.Result:Three-dimensional model of AdvanSync functional appliances was established.When the appliance was leaded force,the left side and the right side of the temporomandibular joint stress distribution is basically the same,equivalent stress mainly concentrated in front of the condylar slope near the neck of condyle,condylar cartilage in front,articular disc cavity with;the maximum principal stress distribution of equivalent stress analysis results are basically the same,mainly bear tensile force;the minimum principal stress mainly concentrated in the top of condyle and condylar cartilage at the top,which mainly bear compressive stress.Conclusion: When AdvanSync functional appliance lead submaxila forward,condylar process and condylar chondrocyte have the adaptive trend under pressure.But articular disc have little effect.