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Abstract
To investigate the importance of nutritive environment in the healing of reconstructed ligaments, the morphology of sutured free patellar ligaments in synovial fluid of the contralateral knee joint, without re-establishment of microcirculation, was studied in rabbits. After two weeks (n=6) and one (n=6) and three (n=5) months, the sutured ligament was removed from the joint and fibroblasts were seen growing into the suture gap. The ligaments were enveloped in a capsule of fibroblasts, which was more developed in those ligaments that were studied three months after operation. The collagen of the piece of ligament was disorganised at all time points, and tensile strength (n=6) was low compared with non-sutured patellar ligament. Some ligaments disappeared or were partly attached to the synovial membrane and revascularised. The findings indicate that diffusion of nutrients may be important for the survival and healing of reconstructed ligaments, as the ligaments can heal in synovial fluid without re-establishment of the microcirculation.