ASSESSMENT OF THE BIOMECHANICAL COMPATIBILITY OF AN INTERSPINOUS IMPLANT FOR "DYNAMIC STABILIZATION" THROUGH THE FINITE ELEMENT METHOD

被引：1

作者：

Contro, R. ^{[1
]}

Vena, P. ^{[1
]}

Gastaldi, D. ^{[1
]}

Franzoso, G. ^{[1
]}

机构：

[1] Politecn Milan, Dept Struct Engn, Lab Biol Struct Mech, I-20133 Milan, Italy

来源：

JOURNAL OF MECHANICS IN MEDICINE AND BIOLOGY | 2005年 / 5卷 / 02期

关键词：

Finite element model; lumbar spine; intervertebral disc; soft biological tissues; titanium alloy; Ni-Ti alloy;

D O I：

10.1142/S0219519405001515

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

The paper addresses the biomechanical compatibility of an interspinous implant used for "dynamic stabilization" of a diseased intervertebral disc. A comparison between the behaviour of a titanium alloy (Ti6Al4V) implant and that of a superelastic alloy (Ni-Ti) implant has been carried out. The assessment of the biomechanical compatibility was achieved by means of the finite element method, in which suitably implemented constitutive laws for the materials have been used. The L4-L5 lumbar system in healthy state has been assumed as target for a biomechanically compatible implant. The L4-L5 system with the interspinous implant subjected to compressive force and bending moments has been simulated. A strength analysis for the bearing bone tissue in the posterior processes was also carried out. The results have shown that both implants were able to decrease the force on the apophyseal joints; however, the titanium-based implant exhibited a low biomechanical compatibility under extension-flexion in the sagittal plane; whereas the Ni-Ti exhibited a higher compatibility.

引用

页码：375 / 382

页数：8

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