González RGA, Agraz CA, Rico FR, Beltrán FJA

Language: Spanish
References: 10
Page: 195-199
PDF size: 224.92 Kb.

ABSTRACT

Background: Cervical corpectomy is a surgical resource needed to replace vertebral body damaged by the action of some sort of accident causing a fracture. In flexion compression fractures stage 5 in the vertebral body, the degree of complexity must be evaluated in order to determine if it is necessary to perform a corpectomy with bone graft. Behavior of such a structural graft should be known.
Objective: To report results of the mechanic-static structural analysis of assembly of a model of finite element in the C3-C5 cervical range, including a bone graft of trapezoidal-shaped cut on the platforms at an angle of 10 degrees each, secured by a cervical plate.
Material and method: An observational study was made in which a finite elements model conformed by cervical C3, C4 and C5 was reproduced, with a bone graft in the region of the vertebral body from cervical C4 in an specific angulation, assured by a cervical plaque. The cases presented in the study are: 80 N, 637.5 N and 6,374.5 N, corresponding to the weight of the head, the weight of the patient and the value at which the vertebral body fractures. We used ANSYS program.
Results: The results indicated displacements smaller than 1 mm between the graft and the adjacent vertebral bodies. Conclusions: According to the concept of backbone stability described by White & Panjabi, the model was stable since no exceeded reference limits of 3.0 mm.

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