Fig. 3.

The maximum load in each age group as normalized by the maximum load of the intact anterior cruciate ligament for that age group. *The juvenile animals had a threefold greater normalized maximum load than the adult animals in the untreated (no Tx) group (p < 0.01). †For ligaments treated with collagen-platelet composite (CPC), both the juvenile and adolescent animals had higher normalized maximum loads than the adult group (p < 0.01 for both comparisons). §The addition of the collagen-platelet composite resulted in an 85% increase in maximum load in the adolescent group (p < 0.01).