Document Type


Date of Award


Degree Name

Master of Science in Biomedical Engineering - (M.S.)


Biomedical Engineering Committee

First Advisor

David S. Kristol

Second Advisor

Frank Y. Shih

Third Advisor

Timothy Nam Chang


A three dimensional model of half of the mandibular bone, with 487 tetrahedra elements and 1,047 nodes, is established and analyzed by means of I-DEAS software. The masseter muscle is assumed to be 15° deviation from y-axis, and the Umetani boundary conditions are allowed to be varied. A 337 lb force was applied along the midline of the mandible to simulate a trauma force caused by the auto accident. The maximum principal stress is 18,400 psi and the minimum principal stress is -1,340 psi. Depending on the experimental results of dispalcement and maximum principal stress, the conclusions are drawn: 1) mandibular body and angle may have the highest probability of fracture, 2) the mandible is under compressive stress and of the compressive displacement. There are maximum stress concentration occured in the condyle process area and the coronoid process area. The results are approximately agreed with the clinic investigation of 1,521 series of mandibular bone fractures.



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