| 
      
        | Group | Scaffold | Osteoinductive agent | Anti-resorptive agent | Mice | Exclusions |  
        | 1 | Porous PLGA | rhBMP-2 (10µg) | None | N=8 | 2 |  
        | 2 | Porous PLGA | rhBMP-2 (10µg) | PS-1145 (low 40µg) | N=8 | 1 |  
        | 3 | Porous PLGA | rhBMP-2 (10µg) | PS-1145 (high 80µg) | N=8 | 3 |  
        | 4 | Porous PLGA | rhBMP-2 (10µg) | PS-1145 (systemic 50mg/kg) | N=8 | 1 |  |