For example, in one particular embodiment, the essentially inflexible contact surface of {TAIL ~ the sensor} can include curvature such as that described by the contact surface of a polymeric bearing portion of an implantable artificial replacement joint such as the polymeric bearing portion of {HEAD ~ a hip, knee, or shoulder replacement joint} 
For example , in one particular embodiment , the essentially inflexible contact surface of { TAIL ~ the sensor } can include curvature such as that described by the contact surface of a polymeric bearing portion of an implantable artificial replacement joint such as the polymeric bearing portion of { HEAD ~ a hip , knee , or shoulder replacement joint }
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