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Fig. 9 | BMC Musculoskeletal Disorders

Fig. 9

From: Cervical disc prostheses need a variable center of rotation for flexion / extension below disc level, plus a separate COR for lateral bending above disc level to more closely replicate in-vivo motion: MRI-based biomechanical in-vivo study

Fig. 9

Biomechanical concept and possible design of a simple 2-piece cervical disc prosthesis fulfilling the biomechanical requirements described in our study a Flexion / extension is facilitated through a variable radius also allowing sagittal translation and tilting when necessary b Separate COR for lateral-bending above disc level allowing coupled motion with physiological ipsilateral rotation c Total view showing the saddle-like gliding surface of the lower part and the spherical gliding surface of the upper part of the prosthesis

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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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