| 摘要 |
<p>A process is described for the removal of prosthetic cement from the medullary canal (11) of a patient's long bone comprising: (a) determining the profile of a line of intersection of a plane, and a cement/bone interface intersected by that plane; (b) determining the thickness of the prosthetic cement in the said plane; (c) forming or selecting a substantially planar cutting blade (17) with a cutting edge having a profile (18) substantially corresponding to the profile of the line; (d) inserting the cutting blade (17) into the prosthetic cavity with the blade lying in the said plane, the cutting edge directed towards the cement/bone interface, and to a depth such that corresponding points of the cutting edge are adjacent corresponding points on the said line; (e) causing the cutting blade to reciprocate; (f) inserting into the prosthetic cavity between a non-cutting edge of the blade and a wall of the prosthetic cavity spaced from the said cement/bone interface a guide member (30) adapted to urge the cutting edge of the blade into the prosthetic cement towards the said cement/bone interface but substantially not beyond it; (g) repeating steps (e) to (f); (h) removing the segments of prosthetic cement so formed from the medullary canal (11).</p> |
