Abstract
This study aimed to evaluate the activity of matrix metalloproteinases (MMPs) on primary and permanent dentin and monitor the degradation of dentin collagen over time. Twenty-four dentin beams with dimensions of 1.0 mm wide by 1.0 mm thick and 4.0 mm long will be obtained from sound human primary and third molars (n=12). The beams will be completely demineralized in 10% phosphoric acid f…