Functional Design and Analysis of a Linked Shoulder Prosthesis

Persistent shoulder instability following joint arthroplasty remains a concern with mixed outcomes following clinical and surgical intervention. Thus, a linked universal joint implant was developed and functionally analyzed. A virtual model of the linked implant was developed and implanted in a 3D bony specimen to measure the available circumduction range of motion. Stresses in the implant were estimated using finite element analysis based on joint loads during activities of daily life. The glenoid fixation stress was evaluated using finite element analysis.

The implant was capable of restoring normal range of motion, and withstanding expected joint loads without yield or fatigue failure. Bone fixation stress remains a concern, depending on the implant configuration and aggressive joint loading.

Keywords: Shoulder arthroplasty; Chronic Shoulder Instability; Salvage Procedure; Universal Joint; Linked Implant

Year	Entry
1969	Clauser CE, McConville JT, Young JW. Weight, Volume, and Center of Mass of Segments of the Human Body. Wright-Patterson AFB, Ohio: Aerospace Medical Research Laboratory; August 1969. Report No. AFRL-TR-69-70.
2015	Oftadeh R, Perez-Viloria M, Villa-Camacho JC, Vaziri A, Nazarian A. Biomechanics and mechanobiology of trabecular bone: a review. J Biomech Eng. January 2015;137(1):010802.
2005	Wu G, van der Helm FCT, Veeger HEJ, Makhsous M, Van Roy P, Anglin C, Nagels J, Karduna AR, McQuade K, Wang X, Werner FW, Buchholz B. ISB recommendation on definitions of joint coordinate systems of various joints for the reporting of human joint motion, II: shoulder, elbow, wrist and hand. J Biomech. May 2005;38(5):981-992.
1997	Prendergast PJ. Finite element models in tissue mechanics and orthopaedic implant design. Clin Biomech (Bristol, Avon). September 1997;12(6):343-366.
2004	Taddei F, Pancanti A, Viceconti M. An improved method for the automatic mapping of computed tomography numbers onto finite element models. Med Eng Phys. 2004;26(1):61-69.
2001	de Groot JH, Brand R. A three-dimensional regression model of the shoulder rhythm. Clin Biomech (Bristol, Avon). November 2001;16(9):735-743.
1970	Galante J, Rostoker W, Ray RD. Physical properties of trabecular bone. Calcif Tiss Res. 1970;5(1):236-246.
1996	Ford CM, Keaveny TM. The dependence of shear failure properties of trabecular bone on apparent density and trabecular orientation. J Biomech. 1996;29(10):1309-1317.

Year

Entry

1969

Clauser CE, McConville JT, Young JW. Weight, Volume, and Center of Mass of Segments of the Human Body. Wright-Patterson AFB, Ohio: Aerospace Medical Research Laboratory; August 1969. Report No. AFRL-TR-69-70.

2015

Oftadeh R, Perez-Viloria M, Villa-Camacho JC, Vaziri A, Nazarian A. Biomechanics and mechanobiology of trabecular bone: a review. J Biomech Eng. January 2015;137(1):010802.

2005

Wu G, van der Helm FCT, Veeger HEJ, Makhsous M, Van Roy P, Anglin C, Nagels J, Karduna AR, McQuade K, Wang X, Werner FW, Buchholz B. ISB recommendation on definitions of joint coordinate systems of various joints for the reporting of human joint motion, II: shoulder, elbow, wrist and hand. J Biomech. May 2005;38(5):981-992.

1997

Prendergast PJ. Finite element models in tissue mechanics and orthopaedic implant design. Clin Biomech (Bristol, Avon). September 1997;12(6):343-366.

2004

Taddei F, Pancanti A, Viceconti M. An improved method for the automatic mapping of computed tomography numbers onto finite element models. Med Eng Phys. 2004;26(1):61-69.

2001

de Groot JH, Brand R. A three-dimensional regression model of the shoulder rhythm. Clin Biomech (Bristol, Avon). November 2001;16(9):735-743.

1970

Galante J, Rostoker W, Ray RD. Physical properties of trabecular bone. Calcif Tiss Res. 1970;5(1):236-246.

1996

Ford CM, Keaveny TM. The dependence of shear failure properties of trabecular bone on apparent density and trabecular orientation. J Biomech. 1996;29(10):1309-1317.

Year	Entry
2024	Cunningham D. An Analysis of Primary Stability of Stemless Humeral Implants in Shoulder Arthroplasty [PhD thesis]. University of Western Ontario; 2024.

Year

Entry

2024

Cunningham D. An Analysis of Primary Stability of Stemless Humeral Implants in Shoulder Arthroplasty [PhD thesis]. University of Western Ontario; 2024.