There is a high level of patient appeal and physician acceptance of motion preservation as the future treatment of symptomatic and painful degenerative disc disease. However, spinal artificial disc replacement is still in its infancy. We have been designing, developing and evaluating motor articulated implants for use in bone-spinal disc surgery for Asian population. Apart from the generally smaller built of Asian compared to the American and European, the motor articulated implant should make provisions for the difference in eastern and western lifestyles. In the eastern world, we generally sit on a lower platform. Frequent activities like squatting result in a different stress-strain profile on the lower spine of an Asian compared to that of the Westerner. Preserving the motion of flexion bending in human lumbar spine is important. The motion preservation characteristics have to be maintained without compromising device durability, bone-device interfaces and corrective intervention. A systematic approach was adapted in designing the implant. Physical size of the implant should replicate the actual Intravertebral Disc (IVD). Implant should be able to fit into vertebral body. This is aid by shaping the spine vertebral body to accommodate the implant. A motor articulated implant must have suitable spaces for the implementation of sensors to detect forces and motors to control the motion of the prototype. The device must be able to receive real-time sensory inputs which can then modulate the implant orientation in bending accordingly. A prototype of the implant device has been fabricated to study its motion preservation capabilities. The prototype comprises of a parallel manipulator mechanism where the top plate is linked to the base plate by independent kinematic chains. The mechanical structure is made of Aluminium 6061. The mechanical parts were also put through the chemical process of anodizing for a good finishing surface. In the prototype device, we used three DC micromotors (Faulhaber) for actuation. Due to the small dimension, fibre optics pressure sensors were used. Three customized sensors were developed, calibrated and deployed on the upper plate. A PIC32 microprocessor was used to compute the compliance motion of the prototype when subjected to forces during flexion bending motion. The computer simulation of the kinematics of the parallel mechanism demonstrated the implant's flexion bending capabilities. We are conducting biomechanical experiments with this prototype implant deployed between L3–L5 of an artificial spinal column. The prototype device should achieve motion preservation capabilities comparable to the existing implants. More computer simulation will also be conducted to improve the mechanical design and control mechanisms of the proposed disc implant.
Skip Nav Destination
Article navigation
Design Of Medical Devices Conference Abstracts
An Intelligent Bone Spinal Disc Implant for Asian Population
C. Chui,
C. Chui
National University of Singapore
, Singapore
Search for other works by this author on:
M. N. Jonaidi,
M. N. Jonaidi
National University of Singapore
, Singapore
Search for other works by this author on:
S. Kuang
S. Kuang
National University of Singapore
, Singapore
Search for other works by this author on:
C. Chui
National University of Singapore
, Singapore
M. N. Jonaidi
National University of Singapore
, Singapore
S. Kuang
National University of Singapore
, SingaporeJ. Med. Devices. Jun 2009, 3(2): 027505 (1 pages)
Published Online: June 30, 2009
Article history
Published:
June 30, 2009
Citation
Chui, C., Jonaidi, M. N., and Kuang, S. (June 30, 2009). "An Intelligent Bone Spinal Disc Implant for Asian Population." ASME. J. Med. Devices. June 2009; 3(2): 027505. https://doi.org/10.1115/1.3134841
Download citation file:
1,156
Views
Get Email Alerts
Cited By
Context-Driven Design of a Laparoscopic Instrument Cleaner for Use in Rural Low-Resource Hospitals
J. Med. Devices (March 2025)
Controlled Ice Nucleation With a Sand-PDMS Film Device Enhances Cryopreservation of Mouse Preantral Ovarian Follicles
J. Med. Devices (December 2024)
Review of Blood and Fluid Warming Methods
J. Med. Devices (December 2024)
Related Articles
Design Concept for a Total Knee Replacement with Condylar Guiding Features
J. Med. Devices (June,2011)
A New External Fixator Design for Femoral Fracture Reduction
J. Med. Devices (June,2008)
Design of a Dynamic Stabilization Spine Implant
J. Med. Devices (June,2009)
Finite Element Modeling of Resurfacing Hip Prosthesis: Estimation of Accuracy Through Experimental Validation
J Biomech Eng (February,2010)
Related Proceedings Papers
Related Chapters
Vibration Analysis of the Seated Human Body in Vertical Direction
International Conference on Computer Technology and Development, 3rd (ICCTD 2011)
Computer Aided Oracle Bone Inscriptions Textual Research Based on Ontology
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3
Research on Oracle Bone Inscriptions Machine Translation Based on Example and Ontology
International Conference on Advanced Computer Theory and Engineering, 4th (ICACTE 2011)