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Optimal citric acid concentration for dentinal demineralization
J D Sterrett1, B Delaney, A Rizkalla
1Dalhousie University, Halifax, Nova Scotia, Canada.
Summary
This study found an optimal concentration for citric acid to demineralize dentin, crucial for periodontal regeneration. Beyond 24% citric acid, demineralization effectiveness decreases, indicating a peak concentration for optimal results.
Area of Science:
- Biomaterials Science
- Dental Research
- Biomineralization
Background:
- Acids can diminish enamel demineralization rates above certain concentrations.
- Citric acid is utilized for dentin demineralization in periodontal regenerative procedures.
Purpose of the Study:
- To determine if an optimal concentration of citric acid exists for dentin demineralization.
- Investigate the effect of varying citric acid concentrations on dentin demineralization.
Main Methods:
- Bovine dentin samples were exposed to various concentrations of citric acid.
- Atomic absorption spectrophotometry was used to quantify dissolved calcium levels.
Main Results:
- Calcium dissolution increased with citric acid concentration up to 24% (7.54 ppm/24%).
- Higher concentrations (80%) showed reduced calcium dissolution (2.43 ppm/80%).
- The peak demineralization occurred at a pH of 1.42.
Conclusions:
- A peak concentration for effective dentinal demineralization by citric acid likely exists.
- Concentrations beyond 24% may diminish the efficacy of citric acid in demineralizing dentin.
- Findings are relevant for optimizing periodontal regenerative procedures.