Tooth enamel and dentin surface

The tooth surface, primarily composed of enamel and dentin, functions as a mineralized micromechanical substrate essential for oral health and restorative dentistry. Enamel is a highly calcified tissue consisting of approximately 96% inorganic material, mainly hydroxyapatite, while dentin is a less mineralized, porous tissue characterized by microscopic tubules (StatPearls: Anatomy, Head and Neck, Tooth, 2023). This substrate is not a traditional molecular target like a receptor; rather, it serves as a physical and chemical site for the application of therapeutic agents and restorative materials. Drugs such as fluoride interact with this substrate by promoting the remineralization of hydroxyapatite into fluorapatite, which is significantly more resistant to acid dissolution caused by cariogenic bacteria (NIH: Fluoride Fact Sheet, 2022). In restorative procedures, the surface is often conditioned with acids to create a microporous topography, enabling the micromechanical interlocking of resins to ensure the longevity of dental fillings and sealants (PubMed: Adhesion to enamel and dentin, 2004). Understanding the topography and chemical composition of this substrate is crucial for the success of preventive treatments and the management of conditions like dentin hypersensitivity.

Other names

Dental substrateEnamel surfaceDentin surfaceTooth structureMicromechanical dental substrateMineralized tooth tissue

Promotion of remineralization through the conversion of hydroxyapatite to fluorapatite, which increases acid resistance, and the physical occlusion of dentinal tubules to block external stimuli from reaching nerve endings.