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The Journal of Bone & Joint Surgery British Volume
Vol. 78-B, Issue 2 | Pages 213 - 216
1 Mar 1996
Alexeeff M Mahomed N Morsi E Garbuz D Gross A Latner AJ

We report 11 patients having revision of total hip arthroplasty using massive structural allografts for failure due to sepsis and associated bone loss. All patients had a two-stage reconstruction and the mean follow-up was 47.8 months (24 to 72). Positive cultures were obtained at the first stage in nine of the 11 patients, with Staphylococcus epidermidis being the most common organism. The other two patients had draining sinuses with negative cultures.

There was no recurrence of infection in any patient. The mean increase in the modified Harris hip score was 45 and all the grafts appeared to have united to host bone. Two patients required additional procedures, but only one was related to the allograft. Complications included an incomplete sciatic nerve palsy and one case of graft resorption. Our results support the use of massive allografts in failed septic hip arthroplasty in which there is associated bone loss.


The Journal of Bone & Joint Surgery British Volume
Vol. 76-B, Issue 1 | Pages 88 - 90
1 Jan 1994
Mahomed N McKee N Solomon P Lahoda L Gross A

We report two cases in which arthrodesed knees were revised to total arthroplasties after the use of soft-tissue expanders. Case 1 had had multiple operations on her knee and had been arthrodesed for septic arthritis two years earlier. Case 2 had had knee arthrodesis for severe osteoarthritis 18 years before revision. In both patients, tissue expanders were used to increase the soft tissues available for cover and to help to mobilise the extensor mechanism. The operations were made much easier, and in both patients a range of motion from 0 degrees to 90 degrees was achieved at operation.


The Journal of Bone & Joint Surgery British Volume
Vol. 75-B, Issue 3 | Pages 437 - 440
1 May 1993
Ogilvie-Harris D Mahomed N Demaziere A

We reviewed 17 patients after arthroscopic resection for anterior impingement in the ankle. All had had painful limitation of dorsiflexion which had failed to respond to conservative treatment. Review at an average of 39 months showed very significant improvements in levels of pain, swelling, stiffness, limping and activity. There was a significant improvement in the range of dorsiflexion but not of plantar flexion. One poor result was due to a superficial infection, and two other patients had residual numbness of the foot which persisted for several months.


The Journal of Bone & Joint Surgery British Volume
Vol. 74-B, Issue 3 | Pages 452 - 456
1 May 1992
Maistrelli G Mahomed N Garbuz D Fornasier V Harrington I Binnington A

In 33 dogs we implanted femoral stems made either of carbon composite, some coated with hydroxyapatite, or of titanium alloy with a porous coating. Osseointegration was greater in the hydroxyapatite-coated than in the un-coated stems (p less than 0.001). Push-out tests, at an average of 7.2 months after implantation, showed a six-fold increase in interface shear strength and a twelve-fold increase in shear stiffness in the hydroxyapatite-coated group compared with noncoated implants. The highest shear-strength values were found in the porous-coated titanium alloy stems, around which there was also the most resorptive bone remodelling.