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Soluble denture adhesives: pH and sodium content
K D Collys1, A C Roma de Sousa, J Smeyers-Verbeke
1Vrije Universiteit Brussel, Eenheid Prothetische Tandheelkunde (PRTA), Belgium.
Summary
Many denture adhesives contain sodium, potentially increasing daily intake. Gum karaya adhesives are acidic and sodium-free, offering an alternative for patients monitoring sodium consumption.
Area of Science:
- Oral health
- Dental materials science
- Dietary analysis
Background:
- Denture adhesives are commonly used to improve denture retention and stability.
- Concerns exist regarding the potential systemic absorption of ingredients from denture adhesives, particularly sodium.
- Understanding the composition and sodium content of available denture adhesives is crucial for patient health.
Purpose of the Study:
- To analyze the pH and sodium content of soluble denture adhesives.
- To quantify the amount of adhesive used per application.
- To estimate the supplementary daily sodium intake from denture adhesive use.
Main Methods:
- Seventeen soluble denture adhesives were selected from Belgian drug stores.
- pH was measured using a glass electrode; sodium content was determined by atomic emission spectrometry.
- Adhesive amounts per application were weighed according to manufacturer instructions.
Main Results:
- Gum karaya adhesives exhibited acidic pH (<5) and contained no detectable sodium.
- Other formulations had neutral pH (~7) and varied sodium content (1.1–8.7 g/100 g).
- Daily use could lead to a supplementary sodium intake of 0.9–6.0 mmol Na+/day.
Conclusions:
- Denture adhesive formulations differ significantly in pH and sodium content.
- Patients, especially those on sodium-restricted diets, should be aware of the sodium content in their chosen denture adhesive.
- Gum karaya based adhesives present a sodium-free option.