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Dental Journal (Majalah Kedokteran Gigi)

ISSN 1978-3728

Vol. 40 / No. 2 / Published : 2007-04

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Original Article :

The effect of voltage and time of exposure on surface hardness of resin modified glass ionomer cement

Author :

  1. Titien Hary Agustantina*1
  1. Department of Dental Material and Technology Dentistry Faculty of Dentistry Airlangga University Surabaya-Indonesia

Abstract :

Light intensity can affect the polymerization of resin-based material therefore it will also affect surface hardness. To compensate reduction of light intensity becaused of the input of low voltage (200 and 210 volt), the exposure time was prolonged to be 40 and 60 seconds. The purpose of this study was to know the effect of voltage and time of exposure of resin modified glass ionomer cement on surface hardness. This study was completed with seventy two samples of resin modified glass ionomer cement 5 mm in diameter and 2 mm in height, exposed by visible light curing for 20, 40, and 60 seconds with voltage input 220, 210 and 200 volt. Micro vickers hardness tester was used to test surface hardness on the upper surface of sample. Two-way ANOVA test and Least Significant Difference (LSD) were used in data analysis with 5% level of significance. The result showed that lower input (210 and 210 volt) would decrease surface hardness of resin modified glass ionomer cement, longer exposure time (40 and 60 seconds) would increase the surface hardness of resin modified glass ionomer cement. The conclusion is the prolong of exposure time from 20 seconds to 40 and 60 seconds in all voltage input could increase surface hardness of resin modified glass ionomer cement.

Keyword :

voltage, exposure time, resin modified glass ionomer cement, surface hardness ,


References :



       


    Archive Article

    Cover Media Content

    Volume : 40 / No. : 2 / Pub. : 2007-06
    1. P53-protein Over-expression And Gene Mutational Of Oral Carcinoma In-situ
    2. Nanotechnology In Dentistry
    3. Thinking Pattern Of First Grade Students Towards Edentulous Replacement
    4. The Response Of Periodontal Ligament Collagen Fibres And The Thickness Of Inserting Periodontal Ligament Fibre Bundles At Cementum Pressure Sites Of Fixed Orthodontic Appliances
    5. Effect Of Pressure And Polishing Technique On Surface Roughness Of Cold Cured Acrylic Resin
    6. Lipopolysaccharide (lps) Introduction During Growth And Development Period Of Rat’s Tooth Toward The Occurrence Of Enamel Hypoplasia
    7. Study Of Chemical Bond Strength Of Methyl Methacrylate (mma) Based Bonding Agent On Type I Dentin Collagen At Various Humidity
    8. The Effect Of Voltage And Time Of Exposure On Surface Hardness Of Resin Modified Glass Ionomer Cement
    9. Pin-retain For Restoration Of Widely Tooth Damaged
    10. Dimensional Change Of Acrylic Resin Plate After The Reinforcement Of Glass Fibre