Mineralized dentin

Mineralized dentin is the calcified tissue that forms the bulk of the tooth, providing structural integrity and protecting the underlying dental pulp (StatPearls, 2023). It is composed of approximately 70% inorganic hydroxyapatite, 20% organic material (predominantly Type I collagen), and 10% water (PubMed, PMID: 27507480). The tissue is characterized by the presence of dentinal tubules, which extend from the pulp to the dentino-enamel junction and play a vital role in tooth sensitivity and fluid transport (NIH, 2022). In clinical dentistry, mineralized dentin is a primary target for remineralization therapies using fluoride or calcium-based agents to combat dental caries (Journal of Dental Research, 2018). It also serves as the substrate for adhesive restorations, where the stability of the collagen-resin interface is essential for long-term durability (PubMed, PMID: 22266128). Furthermore, treatments for dentin hypersensitivity target the tubules within the mineralized matrix to block external stimuli from reaching the pulpal nerves (Cochrane Database, 2020). The degradation of the organic matrix by endogenous enzymes like matrix metalloproteinases is a major challenge in restorative dentistry, leading to the failure of dentin bonds (PubMed, PMID: 23407137). Therapeutic interventions often aim to either reinforce this mineralized structure or seal its porous surface to maintain oral health.

Other names

DentinCalcified dentinDentinum

The primary mechanisms of action for drugs targeting mineralized dentin include remineralization through the formation of fluorapatite, which is more acid-resistant than hydroxyapatite (PubChem); the physical occlusion of dentinal tubules to reduce hydrodynamic fluid movement and subsequent nerve activation (StatPearls); and the inhibition of endogenous matrix metalloproteinases (MMPs) and cysteine cathepsins to prevent the enzymatic degradation of the collagen matrix (PubMed, PMID: 23407137).