By Pierre Le Beguec, Hans-Peter Sieber
The writer of this multimedia paintings units himself an formidable aim: to permit a health professional to accomplish the revision of a prosthesis with out too many problems (or an excessive amount of apprehension!) with assured effects if he follows the proposed technique step-by-step, and this, no matter if he's not very skilled during this discipline.To fulfil this function, the writer presents a transparent definition of the press-fit notion (principles and functional purposes) and from there, he bargains a logical and rigorous process for, firstly, making plans the surgical procedure, after which, appearing it.The written textual content can also be to be had as a automatic slide convey, coming with a searching method with a purpose to make a pre-operative making plans, which provides genuine pedagogic price to the entire of this paintings.
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Extra resources for Revision of loose femoral prostheses with a modular stem system basing on the ''press-fit'' principle
Example text
An endofemoral approach is possible whenever the femur is straight in frontal view and the defects are small. A proximal, metaphyseo-diaphyseal fixation is then achieved, always by means of a short stem. Even though not frequent, the trochanteric osteotomy keeps its limited but clear indications and it must be stressed that this approach has the merit to ease the implantation of a straight stem in cases where a femoral flap is not desired or a proximal fixation mode must absolutely be achieved for other reasons.
61). 3 CEMENT REMOVAL The complete removal of the cement mantle is of outstanding importance in stem revision and this step can turn out to be very stressful for the surgeon (as it is expressed by the high number of different tools for cement removal actually on the market). To avoid this, the surgeon should mind the 3 following principles: To keep a direct vision into the medullary space, remembering that any curving of the femur in the sagittal plane will be the first obstacle to cement removal.
The distal components of length 260 mm are seldom used. 3 PROXIMAL TRIAL PARTS (FIG. 8) These instruments enable the definitive distal component to be implanted when a femoral flap has been completed. They allow to adjust precisely the antetorsion and mostly to determine the size of the proximal definitive component after having secured a Figure 7 stable wedging of the distal component. 8 A). It is assembled to the definitive distal component by means of nut screwed to the threaded part of the morse taper without any contact with the morse taper (fig.
