Faculty Collaboration Database

Intervertebral measurement of lumbar segmental motion with a new measuring device. Med Eng Phys 1998 Mar;20(2):139-48

Date

07/29/1998

Pubmed ID

9679233

DOI

10.1016/s1350-4533(97)00053-2

Scopus ID

2-s2.0-0032029715 (requires institutional sign-in at Scopus site)   5 Citations

Abstract

A new Intervertebral Motion Device (IMD) was developed in this study. Depending on its configuration, the IMD was used to measure motion in the sagittal, frontal, and transverse planes. Calibration results showed that the root-mean-square (RMS) error of the IMD was 0.092 mm in axial translation, 0.065 mm in shear translation, and 0.091 in rotation. Using the IMD, nine intact human lumbosacral spine specimens (L3-S1) were tested under a simulated physiological load on an MTS (Model 858 Bionix, MTS System Corporation Minneapolis, MN). The ranges of motion (ROMs) of intact and instrumented specimens were measured in terms of angular motion (main motion) and coupled translation in the sagittal plane, and angular motion in the transverse plane. The results demonstrated that simulated fusion with CS instrumentation at the level of L4-L5 significantly decreased the ROMs of L4-L5 for all main and coupled motions (P < 0.03). The application of CD rods had less influence on the angular ROM in L/R axial rotation compared to the angular ROMs in Flex/Ext and L/R lateral bending.

Author List

Zhang YM, Voor MJ, Wang M, Johnson JR

Author

Mei Wang PhD Associate Professor in the Orthopaedic Surgery department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Adult
Aged
Aged, 80 and over
Biomechanical Phenomena
Equipment and Supplies
Female
Humans
In Vitro Techniques
Lumbar Vertebrae
Male
Middle Aged
Models, Theoretical
Movement
Spinal Fusion