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Updated: Jul 23, 2025

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Published on: February 22, 2020
Diagnosis and management of METS-Stanmore Morse taper failure
Grégoire Rougereau1, François Gouin2, Jean-Camille Mattei3
1Département de chirurgie orthopédique et traumatologique, Hôpital Cochin, AP-HP, 27, rue du Faubourg Saint-Jacques, 75014 Paris, France; Département de chirurgie orthopédique et traumatologique, hôpital Pitié-Salpêtrière, AP-HP, 75013 Paris, France.
Abstract:
We describe clinical semiology in 6 cases of METS-Stanmore distal femoral Morse taper impaction failure: from obvious forms with intraprosthetic dislocation to chronic forms with less obvious symptoms: instability, piston sensation, rotational disorder in gait. The diagnostic procedure in chronic forms is described, notably with dynamic examination under fluoroscopy. Reduction and re-impaction by external maneuver can be attempted; in case of failure or of any suspicion of taper disassembly, the 2 modular implant components have to be replaced. Finally, we provide a review of the literature on this rare but serious complication. LEVEL OF EVIDENCE: IV.
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