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64 male Wistar rats were used: 24 for the removal of stem cells, 4 as a control group, and 36 for the experiment, in which either stem cells or bone graft was used. The rats were divided into groups according to the type of procedure and time span (15, 30 or 60 days). The joints were submitted to histological study in order to score the ankylosis. The mean differences between initial and final maximal...
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