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Restorative

35 - Comparison of Luting Cement Solubility

Friday, May 23, 2025
11:00 AM - 11:20 AM MDT

    Presenting Author(s)

  • Deok Yong Kim, DMD (he/him/his)

    2nd year resident (PGY-2) in pediatric dentistry
    University of Alabama, Birmingham
    The University of Alabama, Birmingham
    Birmingham, Alabama, United States

    • Co-Author(s)

  • KC

    Kyounga Cheon, DMD

    Associate Professor
    University of Alabama, Birmingham
    Birmingham, Alabama, United States

    • Research Mentor(s)

  • KC

    Kyounga Cheon, DMD

    Associate Professor
    University of Alabama, Birmingham
    Birmingham, Alabama, United States

    • Program Director(s)

  • JJ

    Janice G. Jackson, DMD

    Professor & Chair Department of Pediatric Dentistry
    University of Alabama at Birmingham
    birmingham, Alabama, United States

Abstract:



Purpose: This study aims to evaluate and compare the solubility of the two most commonly used dental luting cement under sports drink exposure.



Methods: A solubility test was performed on glass ionomer (GI) and resin-modified glass ionomer (RMGI) following the ISO 4049:2009. A total of 80 disks (40 GI, 40 RMGI) were prepared with a diameter of 20mm x 3mm thickness. Experimental group (N = 64; 32 GI, 32 RMGI) weight differences were measured in 5 min, 30 min, 60 min, and 180 min after placing in a Gatorade Lemon Lime solution (22°C & pH 2.97). Tap water (22°C & pH 7.2) was used as control (N = 16; 8 GI, 8 RMGI). Each specimen was dried 3 hours at room temperature using a desiccator prior to weighing.



Results: RMGI cement had the overall lowest solubility at each storage time (P < .00001). GI disks exhibited weight change as early as 5 minutes of submerging in solution. RMGI showed first sign of weight change at 60 minutes after submersion in solution (initial weight 1.6mg, final weight 1.59mg). The average solubility of GI after 3 hours was about 3% and RMGI was about 1%.


Conclusion: The success of the restoration depends on the choice of luting cement. While both cements exhibited some degree of dissolution, RMGI cement showed lower overall solubility compared to GI cement in solution of Gatorade solution. Considering lowered pH of the oral cavity after consumption of food, RMGI may provide advantage over GI cement for dental restoration cementation. 

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