Denatured collagen matrix in carious dentin

The denatured collagen matrix in carious dentin is the organic structural framework left behind after bacterial acids demineralize tooth dentin. It primarily consists of Type I collagen that has lost its mineral protection but retains its triple-helical structure in the caries-affected zone (Tjäderhane L, et al., 2015, Journal of Dentistry). This matrix is a primary target for minimally invasive restorative dentistry, where the goal is to preserve and remineralize the tissue rather than excise it (Liu Y, et al., 2011, Dental Materials). Endogenous enzymes, specifically matrix metalloproteinases (MMPs) and cysteine cathepsins, are activated in this acidic environment and contribute to the slow degradation of the collagen scaffold (Bertassoni LE, et al., 2009, Journal of Dentistry). Therapeutic strategies target this matrix using MMP inhibitors like chlorhexidine to arrest degradation and cross-linking agents like proanthocyanidins to enhance mechanical stability (Bedran-Russo AK, et al., 2014, Dental Materials). Additionally, biomimetic analogs are used to facilitate intrafibrillar remineralization, effectively re-fossilizing the collagen fibers. Understanding the state of this matrix is crucial for the success of adhesive restorations, as the quality of the collagen-resin hybrid layer determines the longevity of the repair (Mei ML, et al., 2013, Journal of Dentistry).

Other names

Carious dentin matrixDemineralized dentin collagenDegraded dentin matrixCaries-affected dentin collagen

Therapeutic strategies involve the inhibition of endogenous proteases such as matrix metalloproteinases (MMPs) and cysteine cathepsins to prevent matrix degradation, the use of chemical cross-linkers to stabilize the collagen scaffold, and the application of biomimetic analogs to induce intrafibrillar remineralization of the collagen fibrils.