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Grouping of in vivo primary study.
| HA | MSC | VEGF | |
|---|---|---|---|
| Group 1—8 implants | 500 mg | 3 × 106 | 10 ng release/day |
| Group 2—8 implants | 500 mg | 3 × 106 | 100 ng release/day |
| Group 3—8 implants | 500 mg | 3 × 106 | 500 ng release/day |
| Group 4—8 implants | 500 mg | Allograft | — |
