Patent ID: 7338498

Claim:
A kit for use in shoulder arthroplasty on a shoulder having a humerus with prepared surface and having a glenoid cavity, said kit comprising: a first trial for cooperation with the prepared surface of the humerus, said first trial having a concave first trial first portion closely conforming with the prepared surface of the humerus, the first trial first portion including a positioning portion, the concave first trial first portion having an external periphery being defined by a first set of dimensions, said first trial further having a generally convex first trial second portion for articulating cooperation with the glenoid cavity, the first trial second portion having an external periphery being defined by a second set of dimensions; a first implant, corresponding to said first trial, the first implant having a positioning portion having dimensions substantially the same as the positioning portion of said first trial and a securing portion extending from the positioning portion of said first implant, the first trial first portion of said first trial having dimensions similar to those of the positioning portion of said first implant, whereby the securing portion said first implant may be secured to the humerus below the prepared surface of the humerus; a second trial for cooperation with the humerus, said second trial having a second trial concave first portion having an external periphery being defined by a third set of dimensions, the second trial concave first portion including a positioning portion, first portion the first set of dimensions and the third set of dimensions being substantially identical, said second trial further having a convex second trial second portion for articulating cooperation with the glenoid cavity, the second trial second portion having an external periphery being defined by a fourth set of dimensions, the second set of dimensions and the fourth set of dimensions being substantially different; and a second implant corresponding to said second trial, the second implant having a positioning portion having dimensions substantially the same as the positioning portion of said first trial and a securing portion extending from the positioning portion, the second trial first portion of said second trial having dimensions similar to those of the positioning portion of said first implant and said second implant, wherein said first trial and said second trial may be interchangeably positioned on the prepared surface of the humerus and wherein said first trial and said second trial provide for substantially different articulations of the humerus with respect to the glenoid cavity, whereby the securing portion of said second implant may be secured to the humerus below the prepared surface of the humerus.