Biomechanics of a posture-controlling cervical artificial disc: Mechanical, in vitro, and finite-element analysis

Document Type

Article

Abstract

Different methods have been described by numerous investigators for experimentally assessing the kinematics of cervical artificial discs. However, in addition to understanding how artificial discs affect range of motion, it is also clinically relevant to understand how artificial discs affect segmental posture. The purpose of this paper is to describe novel considerations and methods for experimentally assessing cervical spine postural control in the laboratory. These methods, which include mechanical testing, cadaveric testing, and computer modeling studies, are applied in comparing postural biomechanics of a novel postural control arthroplasty (PCA) device versus standard ball-and-socket (BS) and ball-in-trough (BT) arthroplasty devices. The overall body of evidence from this group of tests supports the conclusion that the PCA device does control posture to a particular lordotic position, whereas BS and BT devices move freely through their ranges of motion.

Keywords

Artificial disc, Biomechanical testing, Cervical disc arthroplasty, Postural control, Segmental kyphosis

Publication Date

6-1-2010

Publication Title

Neurosurgical Focus

E-ISSN

10920684

Volume

28

Issue

6

First Page

1

Last Page

9

PubMed ID

20568917

Digital Object Identifier (DOI)

10.3171/2010.3.FOCUS1063

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