Fig. 9. Synergy prediction on Wnt and BMP2 combination based on Loewe combination index.
5% isobologram of Wnt and BMP2 (green curve) bows inward indicating CI<1, therefore the combination of Wnt and BMP2 is synergy. The optimal combination of Wnt and BMP2 in terms of the minimum total dose to achieve 5% bone mass growth was marked in red at (d1, d2).