Stress distribution and displacement by different distract directions on mandibu lar corpus
- VernacularTitle:牵张方向对下颌骨体部牵张成骨应力分布与位移的影响
- Author:
Zhen SHI
;
Yin DING
;
Meng CAO
- Publication Type:Journal Article
- Keywords:
Mandibular;
Distraction osteogenesis;
Finite elem ent method;
Stress;
Displacement
- From:
Journal of Practical Stomatology
2001;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To study stress distribution and displacement by different distract directioos on mandibular corpus with finite element method. Methods:A three-dimensional finite element model of mandibular distraction osteogenesis was established.Von Mises stress as well as the displac ement of gnathion and gonion under different loads were measured. Result s:The stress and displacement were positively related with distract forc e. Von Mises stress primarily accumulated in distracted areas and were higher un der bilateral distraction parallel to the occlusial plane. Gnathion and gonion w ere positively displaced on X and Z axes and negatively displaced on Y axis. Distraction parallel to the mandibular body induced positive displaceme nt of mandible on X and Y axes and negative on Z axis. Concl usion:Transversal displacement to the opposite side is greater during un ilateral distraction, while displacement on the saggittal plane is greater durin g bilateral distraction.
