E-Knee: Evolution of the Electronic Knee Prosthesis by Beverly A. Morris, Darryl D. D'Lima, John Slamin, Neb Kovacevic, Steven W. Arms, Christopher P.

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Presentation transcript:

e-Knee: Evolution of the Electronic Knee Prosthesis by Beverly A. Morris, Darryl D. D'Lima, John Slamin, Neb Kovacevic, Steven W. Arms, Christopher P. Townsend, and Clifford W. Colwell J Bone Joint Surg Am Volume 83(2 suppl 1):S62-66 October 1, 2001 ©2001 by The Journal of Bone and Joint Surgery, Inc.

Photograph of instrumented prototype and polyethylene insert. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.

Schematic of the e-Knee, a total knee prosthesis containing transducers (load cells), a transmitter, and an antenna. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.

Theoretical model. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.

Preclinical cadaveric testing of a tibial prosthesis instrumented with load cells. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.

Schematic of transducer placement within the tibial tray. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.

Upper and lower plates containing the transducers. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.

Block diagram of the microtransmitter integrated circuits. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.

Instrumented tibial prosthesis and external coil. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.

Intraoperative implantation of the instrumented tibial implant with transmission through an external coil. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.

Instrumented tibial prosthesis with 10 and 15-mm standard tibial inserts. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.

Forces with 10-mm insert, with no applied load. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.

Forces with 15-mm insert, with no applied load. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.

Forces with 100° of flexion, with a varus maneuver. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.

Forces with 100° of flexion, with a valgus maneuver. Beverly A. Morris et al. J Bone Joint Surg Am 2001;83:S ©2001 by The Journal of Bone and Joint Surgery, Inc.