Bone resorption associated with chin augmentation procedures is thought to be due to pressure on the bone exerted by the implanted materials.
A technique minimizing such pressure is described, using multiple small, soft silicone rubber (Silastic) sponge implants, inserted extra-orally with minimum undermining immediately above the periosteum. Postoperative examinations have revealed no indications of bony changes in patients subjected to this technique.
Parkes M. Avoiding Bone Resorption Under Plastic Chin Implants. Arch Otolaryngol. 1973;98(2):100–101. doi:10.1001/archotol.1973.00780020106007
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