Patent ID: 8556901

Claim:
A reciprocating rasp surgical instrument for use in the surgical preparation of a glenoid of a patient prior to implantation of a glenoid prosthesis, the reciprocating rasp surgical instrument comprising: a shaft having a first end configured to be secured in a chuck of a reciprocating tool, and a cutting head secured to a second end of the shaft, the cutting head comprising (i) a D-shaped backside surface, (ii) a cutting surface including a lead cutting surface opposite the backside surface, the cutting surface having a plurality of cutting teeth arranged in a geometry that corresponds with a geometry of the glenoid prosthesis, (iii) an anterior sidewall extending upwardly from the backside surface of the cutting head to the lead cutting surface, the anterior sidewall being devoid of cutting teeth, and (iv) an inwardly curved concave guide surface that is defined in the anterior sidewall, is devoid of cutting teeth, and is configured to receive a guide pin inserted in the glenoid of the patient when the cutting head is secured to the second end of the shaft.