Collagen and organic matrix in dentin and bone

The organic matrix of dentin and bone is a complex structural framework predominantly composed of Type I collagen (approximately 90%) and various non-collagenous proteins such as dentin sialophosphoprotein (DSPP) and osteocalcin (StatPearls, 2023). This matrix serves as the essential template for the deposition of hydroxyapatite crystals, providing hard tissues with their characteristic tensile strength and fracture resistance (PubMed, PMID: 22622760). In clinical dentistry, the preservation of this matrix is critical for the longevity of resin-dentin bonds, as degradation by endogenous enzymes like matrix metalloproteinases (MMPs) can lead to restoration failure (PubMed, PMID: 21247661). In bone, the matrix undergoes constant remodeling by osteoblasts and osteoclasts, a process targeted by pharmacological agents to treat metabolic bone diseases (NIH, 2022). Therapeutic strategies often focus on stabilizing the collagen network through cross-linking agents or preventing its breakdown to maintain structural integrity (PubMed, PMID: 25603115). Furthermore, the interaction between the organic matrix and the mineral phase is a dynamic process that influences the overall bio-mechanical properties of the skeletal and dental systems (PubChem, 2024).

Other names

Dentin organic matrixBone organic matrixType I collagen scaffoldHard tissue extracellular matrix

Stabilization of the collagenous framework through chemical cross-linking or the inhibition of endogenous proteolytic enzymes (MMPs and cathepsins) to prevent matrix degradation and maintain structural integrity.