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A graph shows average wear scores by location for the three contemporary posterior-stabilized knee designs. *The mean total anterior wear damage scores were 5.3 ± 1.4 for the Optetrak®, 2.8 ± 1.5 for the NexGen®, and 0.8 ± 1.4 for the Genesis® II. †The Optetrak® design had predominantly anterior post wear damage, ‡the Genesis® II design had predominantly posterior wear damage, and the NexGen® design demonstrated a more global wear damage pattern (p < 0.001 for all comparisons).
