"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Theoretical pressure and friction in total disc prosthesis for lumbar spine. Influence of ball radius and biomaterial combination

I. ROTARU1,2,* , D. OLARU1

Affiliation

  1. Department of Mechanical Engineering, Mechatronics and Robotics, Faculty of Mechanical Engineering, “Gheorghe Asachi” Technical University of Iasi, 61-63 Bd. Dimitrie Mangeron, 700050 Iasi, Romania
  2. Department of Biomedical Sciences, Faculty of Medical Bioengineering, “Gr.T.Popa” University of Medicine and Pharmacy of Iasi, 9-13M. Kogalniceanu Street, 700454 Iasi, Romania

Abstract

Total disc prosthesis for lumbar spine is a medical device used to completely replace the damaged intervertebral lumbar disc. The main advantages of prosthesis implantation are that this conserves the intervertebral mobility and prevents the adjacent discs degeneration. The purpose of this work was to study the theoretical effect of ball radius on the maximum pressure and on the frictional torque which occurs within lumbar total disc prostheses made of different biomaterial combination. The design of total disc prosthesis investigated was ball-and-socket and the biomaterial couple was metal-on-metal, polymer-on-metal and ceramic-on-ceramic. The results of this study indicated that the maximum pressure in disc prosthesis decrease with ball radius, while the frictional torque has a linear increase with ball radius. This study suggested designing of total disc prostheses for lumbar spine with small ball radius and with ceramic-on-ceramic material combination..

Keywords

Ball-and-Socket, Biomaterial, Friction, Pressure, Disc Prosthesis.

Submitted at: April 20, 2013
Accepted at: May 7, 2015

Citation

I. ROTARU, D. OLARU, Theoretical pressure and friction in total disc prosthesis for lumbar spine. Influence of ball radius and biomaterial combination, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 5-6, pp. 729-733 (2015)