| CPC A61F 2/4657 (2013.01) [A61B 5/1121 (2013.01); A61B 5/1128 (2013.01); A61B 5/4851 (2013.01); A61B 34/20 (2016.02); A61B 34/25 (2016.02); A61F 2/4059 (2013.01); A61F 2/4081 (2013.01); A61F 2/4612 (2013.01); A61B 2034/2059 (2016.02); A61B 2576/02 (2013.01); A61F 2002/30112 (2013.01); A61F 2002/30589 (2013.01); A61F 2002/30649 (2013.01); A61F 2002/3822 (2013.01); A61F 2002/4011 (2013.01); A61F 2002/4085 (2013.01); A61F 2002/4666 (2013.01); A61F 2002/4668 (2013.01); A61F 2002/469 (2013.01); A61F 2250/0096 (2013.01)] | 20 Claims |

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1. A shoulder joint system, comprising:
a first shoulder prosthesis;
a second shoulder prosthesis positioned to contact the first shoulder prosthesis including a first sensor, a second sensor, and a third sensor, wherein the first sensor, the second sensor, and the third sensor are equidistant from each other; and
at least one computer configured to: (i) receive measurement data from the second shoulder prosthesis and (ii) determine a force applied to the first sensor, the second sensor, and/or the third sensor.
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