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Abstract
The role of polyglycolic acid (PGA) rods in the regeneration of cartilage from perichondrium was investigated in 12 growing rabbits. The fifth rib cartilage was resected subperichondrially from both sides. A 10×1.5 mm self-reinforced polyglycolic acid (SR-PGA) rod was inserted on one side to replace the resected cartilage and the retained perichondrium was sutured around the implant. On the control side the perichondrium was shaped into a tube without an implant. Samples were taken 4, 12, and 20 weeks after operation. Pronounced neocartilage formation was seen on both sides, and had grown to form a tube around the implant. Also new bone formation was seen in 12 and 20 weeks. Foreign body reaction was seen inside the implants in every animal.