EFFECT OF WATER TEMPERATURE AND WATER QUALITY ON SETTING TIME OF ALGINATE IMPRESSION MATERIALS
DOI:
https://doi.org/10.55197/qjmhs.v4i5.183Keywords:
alginate, water temperature, impression materials, dental materials, hydrocolloidsAbstract
Alginate impression materials remain as an essential tool in dental practice. Setting time variability has long frustrated clinicians, particularly in tropical climates where water temperatures fluctuate significantly. This study examined how water temperature and quality affect alginate setting time using rheological measurement techniques, aiming to establish practical guidelines for clinical use. This study assessed the normal-setting alginate using a calibrated rheometer (300 Pa shear stress). Water temperatures of 2°C, 23°C, and 32°C were evaluated using distilled water. Tap water was also tested against distilled water at 23°C. One-way ANOVA was used to analyse temperature effects, while t-tests compared water types. Temperature dramatically influenced setting times: 99.36±0.30s at 2°C, 85.18±0.77s at 23°C, and 71.34±1.06s at 32°C (p<0.001). Water quality showed smaller effects: 90.86±1.65s for distilled water versus 86.52±2.46s for tap water (p=0.178). Water temperature significantly affects alginate setting time, with each 10°C increase reducing setting time by approximately 14%. Water quality showed minimal impact under study conditions. These findings support implementing temperature control protocols for optimizing alginate working time in clinical practice.
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