Abstract
Introduction
The purpose of this study is to compare the biomechanical performances of ProDisc-C arthroplasty and Bryan disc arthroplasty.
Materials and Methods
Six human cadaveric cervical spines were used in this study. After testing in the intact condition, all the specimens were reconstructed at C45 level with the following procedures: (1) cervical arthroplasty with ProDisc-C prosthesis; (2) cervical arthroplasty with Bryan disc prosthesis; (3) allograft and cervical plate. Range of motion and intradiscal pressures (IDPs) were recorded under flexion/extension, lateral bending, and rotations.
Results
(1) Comparing to normal model, both Bryan disc and ProDisc-C prosthesis maintained the motion of the operative segment. The ROM was also similar between the ProDisc-C group and Bryan group under all six directional motions. (2) In the ProDisc-C group, the IDPs of adjacent segments trended to decrease; The IDPs of C34 under right bending and left rotation reached a statistical significance. In the Bryan group, the IDPs of adjacent segments also trended to decrease and the IDPs of C34 under left bending reached a statistical significance.
Conclusion
ProDisc-C prosthesis and Bryan disc prosthesis maintained the ROM in all modes of motion. The adjacent segment IDPs both trended to decrease after ProDisc-C arthroplasty and Bryan disc arthroplasty.
None declared
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