The comparison of angular and curvilinear marginal mandibulectomy on force distribution with three dimensional finite element analysis

Biomechanical comparison of two ostectomy configurations for partial mandibulectomy

“…Crescentic mandibular ostectomy has been recommended based on the assumption that right-angled excisions result in development of unnecessary stress risers (9,12,16). Additionally, crescentic ostectomy may be more appropriate as neoplastic growth generally follows an elliptiform pattern, and a crescentic excision results in less bone removal, as it follows the lesion more closely (10). The data from the present investigation do not support this concept because there were no significant differences observed between any of the evaluated parameters.…”

Biomechanical behavior of mandible with posterior marginal resection using finite element analysis

“…Finite element method, a powerful numeric analytic tool, has been applied for mechanical analysis of mandibulectomy, 21,22 however, most studies did not take into account the anisotropic property of the mandibular bone and lack of integration of attached muscles and force directions from those muscles to their simulated models. Several scholars have previously adopted the conventional method of applying concentrated force on the human mandible and finite element model, unanimously recommending that the residual height should exceed 10 mm 11,12 . Therefore, a wide divergence in quantitative results was presented in the literature using physical or finite element models.…”

“…The choice of type of mandibulectomy for patients with oral cancer usually depends on the extent of the tumor extension, the stage of the tumor, and the depth of tumor invasion 12,27,28 . The optimal strategy for the design of marginal resection based on the biomechanical behavior of the remaining mandible is investigated, but the critical factor in these issues is the complete excision of the pathological tissue and the prevention of recurrence.…”

“…Specific biomechanical effects of different osteotomy designs based on curvilinear angle, defect width and height are not been quantified. Therefore, information from quantitative mechanical analysis of resection designs in vitro models would be helpful to clinicians to make decisions when designing marginal resection 12 . This study was to compare biomechanical behavior of a mandible with different marginal resection parameters by finite element analysis (FEA).…”