Fig. 1
From: Comparison of suturing models: the effect on perception of basic surgical skills
Suture models used from each category. a plant-based (peeled orange); b animal-based (a 6 × 6 in. segment of 1–1.5 in. thick pork fat skin); c synthethic-based (a 6 × 6 in. square of 1.5 in. thick dry sponge); d commercial-based (a 5 × 5 in. square of 0.7 in. thick multilayer silicon-rubber pad produced by the University’s Biomedical Engineering Department that simulates muscle, subcutaneous, and skin layers)