Surgical instruments and methods

A kit of surgical instrument parts comprising:

• a cement restrictor inserter instrument comprising:
• an inserter having a handle at a proximal end, a cement restrictor attachment formation at a distal end for releasably attaching a cement restrictor, a shaft extending from the proximal end to the distal end and a stop on the shaft and between the proximal end and the distal end;
• and
• a body having a shape corresponding to the shape of an orthopaedic prosthetic implant, a spacer, a visible depth guide feature and a releasable attachment mechanism by which the body is releasably attachable to a rod, and wherein the spacer is configured to position the visible depth guide feature at a fixed position relative to the inserter when the spacer abuts the stop corresponding to a target cement restrictor position when the visible depth guide feature is aligned with a feature of a bone of a patient in which the cement restrictor is to be inserted;
• and
• a further body having a shape corresponding to the shape of the orthopaedic prosthetic implant, a further spacer, a further visible depth guide feature and a further releasable attachment mechanism by which the further body is releasably attachable to the shaft, and wherein the further body has a different size to the body and corresponds to the shape of a different size of the orthopaedic prosthetic implant and wherein the further spacer has a different size to the spacer and is configured to position the further visible depth guide feature at a different fixed position relative to the inserter when the further spacer abuts the stop corresponding to the target cement restrictor position when the further visible depth guide feature is aligned with the feature of the bone of the patient in which the cement restrictor is to be inserted.