A pre-operative method of determining a glenoid implant and producing a shoulder surgery guide that facilitates securing the glenoid implant (20, 50a) to a face of a glenoid bone, the shoulder surgery guide comprising: - a hub structure comprising a central port, - a plurality of radial arms, - a plurality of peripheral guide structures, - an indentation in each peripheral guide structure, each radial arm extending between a peripheral guide structure and the hub structure, the method comprising: performing a pre-operative analysis of the glenoid implant (20, 50a) and the glenoid bone virtually based on images taken from a subject prior to surgery to determine the configuration of a selected glenoid implant (20, 50a) and the glenoid bone; determining a number and configuration of the plurality of peripheral guide structures sufficient to align the peripheral guide structures with a rim of the face of the glenoid bone and to stabilize the shoulder surgery guide to the face of the glenoid bone; determining the configuration of the indentation in each peripheral guide structure such that the peripheral guide structures extend over a corresponding portion of the rim of the face of the glenoid bone to secure and stabilize the shoulder surgery guide to the face of the glenoid bone; determining lengths of the radial arms of the shoulder surgery guide to position the hub structure over the face of the glenoid bone and to align the central port of the hub structure with a predetermined attachment point for the selected glenoid implant (20, 50a) on the face of the glenoid bone; and producing the shoulder surgery guide device based upon the determined number and configuration of the plurality of peripheral guide structures, the determined configuration of the indentations of the peripheral guide structures, and the determined lengths of the radial arms. - a hub structure comprising a central port, - a plurality of radial arms, - a plurality of peripheral guide structures, - an indentation in each peripheral guide structure, performing a pre-operative analysis of the glenoid implant (20, 50a) and the glenoid bone virtually based on images taken from a subject prior to surgery to determine the configuration of a selected glenoid implant (20, 50a) and the glenoid bone; determining a number and configuration of the plurality of peripheral guide structures sufficient to align the peripheral guide structures with a rim of the face of the glenoid bone and to stabilize the shoulder surgery guide to the face of the glenoid bone; determining the configuration of the indentation in each peripheral guide structure such that the peripheral guide structures extend over a corresponding portion of the rim of the face of the glenoid bone to secure and stabilize the shoulder surgery guide to the face of the glenoid bone; determining lengths of the radial arms of the shoulder surgery guide to position the hub structure over the face of the glenoid bone and to align the central port of the hub structure with a predetermined attachment point for the selected glenoid implant (20, 50a) on the face of the glenoid bone; and producing the shoulder surgery guide device based upon the determined number and configuration of the plurality of peripheral guide structures, the determined configuration of the indentations of the peripheral guide structures, and the determined lengths of the radial arms.