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Percentage of apoptotic chondrocytes at 4, 8, and 12 weeks in different groups (mean ± SD)
| Group (weeks) | SFBM-both | BM-only | SF-only | None-SFBM | Free plug |
|---|---|---|---|---|---|
| 4 | 3.1 ± 0.8 | 39.1 ± 12.6**,## | 5.3 ± 1.8 | 40.6 ± 6.4**,## | 3.0 ± 1.2 |
| 8 | 3.7 ± 1.7 | 58.5 ± 15.5**,## | 16.0 ± 4.1** | 52.1 ± 10.0**,## | 5.1 ± 2.3 |
| 12 | 4.2 ± 1.8 | 56.3 ± 8.5**,## | 15.6 ± 3.9** | 59.0 ± 10.5**,## | 5.0 ± 2.2 |
* P < 0.05 vs. SFBM-both group, ** P < 0.01, vs. control group; # P < 0.05 vs. SF-only group, ## P < 0.01, vs. SF-only group
