Table 4 Failed implants
Failed implants | Hemiarthroplasty | Type / Technique | Indication | Age at time of operation | Time till failure (years) | Complaints / diagnosis failure of implant | Procedure |
|---|---|---|---|---|---|---|---|
A | Unipolar | Mallory Head/Uncemented | Osteonecrosis | 23 | 1.0 | Pain in groin region, positive reaction on bupivacain | Conversion to THA |
B | Unipolar | Mallory Head/Uncemented | Osteonecrosis | 54 | 1.3 | Pain in groin region, positive reaction on bupivacain | Conversion to THA |
C | Bipolar | Mallory Head/Uncemented | Tumour | 33 | 4.2 | Radiographic loosening, per operative pseudo-arthrosis of the allograft-femoral junction | Conversion to THA |
D | Bipolar | Mallory Head/Uncemented | Tumour | 21 | 7.5 | Pain in groin region, per operative acetabular erosion | Conversion to THA |
E | Bipolar | Mallory Head/Uncemented | Tumour | 48 | 15.1 | Unexplained feelings/pain; per operative: mechanical failure of part of implant | Revision head of bipolar implant |
F | Bipolar | Lord/Kotz/Uncemented | Tumour | 35 | 23.7 | Pain in groin region, per operative acetabular erosion | Conversion to THA |