Grechenig, S. and Worlicek, Michael and Penzkofer, R. and Zeman, F. and Kujat, R. and Heiss, P. and Pattappa, G. and Zellner, J. and Angele, P. (2019) y Bone block augmentation from the iliac crest for treatment of deep osteochondral defects of the knee resembles biomechanical properties of the subchondral bone. KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY, 27 (8). pp. 2488-2493. ISSN 0942-2056, 1433-7347
Full text not available from this repository. (Request a copy)Abstract
PurposeBone block augmentation from the iliac crest can be used for reconstruction of the osteochondral unit to restore the underlying subchondral bone upon restoration of the cartilaginous layer via matrix-induced chondrocyte transplantation. To critically understand the successful restoration of the defect, biomechanical and histological analysis of the implanted bone blocks is required. The aim of the study was to analyse the ability of the bone block technique to restore huge bone defects by mimicking the physiological subchondral zone.MethodsThe experiments were performed using lateral femoral condyles and iliac crest bone grafts from the same cadavers (n=6) preserved using the Thiel method. CT scans were made to evaluate bone pathology. Bone mineral density of all specimens was evaluated in the femoral head prior to testing. A series of tests were conducted for each pair of specimens. A static compression test was performed using an electro dynamic testing machine with maximal strength and failure behavior analyzed. Biomechanical tests were performed in the medial-lateral direction for iliac crest and for femoral condyles with and without removal of the cartilage layer. Histological analysis was performed on decalcified specimens for comparison of the condyle at lesion site and the graft.ResultsNo significant difference in failure load could be found for iliac crest (53.3-180.5N) and femoral condyle samples upon cartilage removal (38.5-175.1N) (n.s.). The femoral condyles with an intact cartilage layer showed significantly higher loads (118.3-260.4N) compared to the other groups indicating that native or regenerated cartilage can further increase the failure load (p<0.05). Bone mineral density significantly influenced failure load in all study groups (p<0.05). Histological similarity of the cancellous bone in the femoral condyle and in the iliac crest was observed. However, within the subchondral zone, there was a higher density of sponge like organized trabeculae in the bone samples from the iliac crest. Tide mark was only detected at the osteochondral interface in femoral condyles.ConclusionThis study demonstrated that, bone blocks derived from the iliac crest allow a biomechanical appropriate and stable restoration of huge bony defects by resembling the subchondral zone of the femoral condyle. Therefore, bone augmentation from the iliac crest combined with matrix-induced autologous chondrocyte transplantation seems to be a reasonable method to treat these challenging injuries.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | AUTOLOGOUS CHONDROCYTE IMPLANTATION; ARTICULAR-CARTILAGE; MECHANICAL-PROPERTIES; FOLLOW-UP; TRANSPLANTATION; DISSECANS; REPAIR; PRESERVATION; MOSAICPLASTY; MINIMUM; Osteochondral defects; Bone block augmentation; Cancellous bone grafting; Chondrocyte transplantation |
| Subjects: | 500 Science > 530 Physics 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Unfallchirurgie Medicine > Lehrstuhl für Röntgendiagnostik Medicine > Zentren des Universitätsklinikums Regensburg > Zentrum für Klinische Studien Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Alfons Penzkofer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Apr 2020 09:12 |
| Last Modified: | 01 Apr 2020 09:12 |
| URI: | https://pred.uni-regensburg.de/id/eprint/26557 |
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