Orthopaedic surgical instrument assembly for reaming a patient's acetabulum

A surgical instrument assembly comprising:

• a first component including (i) an outer surface configured to engage a patient's natural acetabulum, (ii) an inner surface positioned opposite the outer surface and defining a hemispherical cavity in the first component, (iii) a plurality of cutting teeth extending outwardly from the outer surface, and (iv) a plurality of apertures defined in the inner surface,
• a second component comprising a single monolithic frame having a plurality of ribs, the frame including a plurality of tabs, wherein each tab of the plurality of tabs is positioned on an outer end of a different rib, each tab being received in a corresponding aperture of the plurality of apertures, and
• a surgical instrument configured to be secured to the frame of the second component to transmit rotational power from the surgical instrument to the first component.

A surgical instrument assembly comprising:

• a metallic hemispherical component including (i) a convex outer surface configured to engage a patient's natural acetabulum, (ii) a concave inner surface positioned opposite the outer surface and defining a cavity in the hemispherical component, (iii) a plurality of cutting teeth extending outwardly from the outer surface, and (iv) a plurality of apertures defined in the inner surface, and
• a driver component removably coupled to the hemispherical component, the driver component formed from a polymeric material and comprising a shank and a plurality of ribs secured to, and extending radially outwardly from, the shank, wherein each rib has an outer end that is spaced apart and separated from every other rib, and each rib includes a tab that is received in a corresponding aperture of the hemispherical component to secure the driver component to the hemispherical component.

A surgical instrument assembly comprising:

• a metallic hemispherical component including (i) a convex outer surface configured to engage a patient's natural acetabulum, (ii) a concave inner surface positioned opposite the outer surface and defining a cavity in the hemispherical component, (iii) a plurality of cutting teeth extending outwardly from the outer surface, and (iv) a plurality of apertures defined in the inner surface, and
• a driver component removably coupled to the hemispherical component, the driver component comprising a shank and a plurality of ribs secured to, and extending radially outwardly from, the shank, wherein each rib has an outer end that is spaced apart and separated from every other rib, and each rib includes a tab that is received in a corresponding aperture of the hemispherical component to secure the driver component to the hemispherical component,
• wherein each rib of the plurality of ribs includes (i) a strut extending outwardly from the shank, (ii) an arm defining the outer end of the rib, the arm of each rib including an arcuate outer surface that engages the concave inner surface of the hemispherical component, and (iii) the tab extending from the arm and being received in the corresponding aperture of the hemispherical component.

A surgical instrument assembly comprising:

• a metallic hemispherical component including (i) a convex outer surface configured to engage a patient's natural acetabulum, (ii) a concave inner surface positioned opposite the outer surface and defining a cavity in the hemispherical component, (iii) a plurality of cutting teeth extending outwardly from the outer surface, and (iv) a plurality of apertures defined in the inner surface, and
• a driver component removably coupled to the hemispherical component, the driver component formed as a single monolithic component and comprising a shank and a plurality of ribs secured to, and extending radially outwardly from, the shank, wherein each rib has an outer end that is spaced apart and separated from every other rib, and each rib includes a tab that is received in a corresponding aperture of the hemispherical component to secure the driver component to the hemispherical component,
• wherein each rib of the plurality of ribs includes (i) a strut extending outwardly from the shank, (ii) an arm defining the outer end of the rib, and (iii) the tab extending from the arm and being received in the corresponding aperture of the hemispherical component.