A Biomimetic Approach for Treating Deep Dentin Carious Lesions Using Dentin Matrix Protein (DMP-1): An In Vitro...

Area of Science:

• Biomaterials Science
• Dental Materials
• Regenerative Dentistry

Background:

• Deep carious dentin lesions pose a challenge for restorative dentistry, often requiring treatments that promote remineralization and surface integrity.
• Current treatments like Mineral Trioxide Aggregate (MTA) and Sylc air abrasion have limitations in fully restoring the mineral and organic phases of affected dentin.

Purpose of the Study:

• To evaluate dentin matrix protein-1 (DMP-1) as a phosphoprotein analogue for mediating mineral deposition and enhancing surface integrity in deep carious dentin.
• To compare the efficacy of DMP-1 with MTA and Sylc air abrasion in treating caries-affected dentin (CAD).

Main Methods:

• Thirty caries-affected dentin discs were treated with DMP-1, MTA, or Sylc air abrasion and incubated in artificial saliva for 30 days.
• Fourier-transform infrared spectroscopy (FTIR), Raman micro-spectroscopy, Vickers hardness testing, and scanning electron microscopy (SEM) were used for analysis.
• Statistical analysis included one-way ANOVA and Tukey's multiple comparison test.

Main Results:

• DMP-1 enhanced phosphate and organic content, and tissue hardness of treated dentin surfaces, demonstrating good wettability.
• MTA-treated surfaces showed the highest phosphate content and Vickers hardness up to 100 µm depth.
• SEM revealed compact surfaces with complete mineral precipitation for both DMP-1 and MTA treatments.

Conclusions:

• DMP-1 acts as a successful biomimetic analogue, enhancing the mineral-organic phases of mineral-depleted dentin.
• DMP-1 offers an effective treatment modality for deep carious lesions, comparable or superior to MTA and Sylc air abrasion in specific aspects.
• Further research into DMP-1's clinical application in restorative dentistry is warranted.