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Arthroplasty

Impaction bone grafting in revision hip surgery

A HIGH INCIDENCE OF COMPLICATIONS



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Abstract

We have reviewed retrospectively 68 revisions of the femoral component in arthroplasties of the hip in 65 patients, using impaction bone grafting, at a median of three years (1 month to 6 years). We employed the cemented Exeter X-Change technique in 36 patients and the uncemented Bi-Metric allografting method in 32. The 37 bone defects were grade 3 or grade 4 on the Endo-Klinik classification.

The Mayo hip score improved from a mean of 32 (sd ± 18) to 62 (sd ± 15). Most (25) of the 34 complications occurred in grade-3 and grade-4 defects; nine were intraoperative diaphyseal fractures and eight fractures of the greater trochanter. All the fractures united.

The risk of intraoperative fracture was prevented by supporting the bone with wires in 16 hips, with reinforcement mesh in 18 and by a plate in six. Early migration of the stem of more than 10 mm during the first year indicated rotational instability; it occurred in three cases.

In difficult revision cases with large defects of the femoral bone, bone-impaction techniques carry a high risk of complications.


Correspondence should be sent to Dr J. Pekkarinen.

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