We evaluated the effect of phytic acid on matrix metalloproteinase (MMP)- or cysteine cathepsin (CC)-mediated dentin degradation. Demineralized beams were divided into five groups (n = 12) and treated with 1%, 2%, 3% 37% phosphoric acid. Untreated demineralized served as controls. After incubation for 1 3 wk, dry mass loss was determined aliquots media analysed cross-linked telopeptide type I c...