EFFECTS OF POLISHING TIME AND THERMALCYCLINGON THE MICROLEAKAGE OF FOUR TOOTH –COLOURED DIRECT RESTORATIVE MATERIALS

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MORTAZAVI V.A.S.; FATHI MOHAMMAD HOSSEIN; BAKHTIAR H.

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Journal: JOURNAL OF RESEARCH IN MEDICAL SCIENCES (JRMS) Year:2002 | Volume:7 | Issue:3 Page(s): 236-242

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Title

EFFECTS OF POLISHING TIME AND THERMALCYCLINGON THE MICROLEAKAGE OF FOUR TOOTH –COLOURED DIRECT RESTORATIVE MATERIALS

Author(s)

MORTAZAVI V.A.S. | FATHI MOHAMMAD HOSSEIN | BAKHTIAR H. | Issue Writer Certificate

Keywords

MICROLEAKAGEQ4

POLISHINGQ4

COMPOSITE RESINQ4

COMPOMERQ4

GLASS IONOMERQ4

RESIN MODIFIED GALSS IONOMERQ4

Abstract

Introdaction. MICROLEAKAGE has been recognized as a major clinical problem with direct filled dental restorations.The purpose of this study was to investigate and to compare the MICROLEAKAGE of four direct filled tooth-coloured materials, evaluation the effects of POLISHING time and thermocycling on the MICROLEAKAGE of these materials.Methods. Wedge-shaped class V cavities were prepared on buccal and lingual surfaces of 96 intact extracted human molar teeth. The teeth were randomly divided into three treatment groups and four subgroups. The cavities of each subgroup were filled using one of these materials: a conventional GLASS IONOMER; a resin modified GLASS IONOMER; a COMPOSITE RESIN and a COMPOMER. POLISHING in the teeth of group 1 was done immediately after placement of restorations and in group 2 one week later. In group 3 delayed POLISHING and thermocycling (X100) was done. All of the teeth were stored in distilled water for one week and then stained with dye, sectioned, and scored for MICROLEAKAGE on occlusal and cervical edges. Results were statistically analyzed by Kruskal wallis and Mann whitney tests.Results. There was a statistically difference between the MICROLEAKAGE scores of four materials (P<0.001). Immediately polished GLASS IONOMER and COMPOMER groups have significantly more MICROLEAKAGE than delayed polished groups (P<0.001). Thermocycting could infulence the MICROLEAKAGE of composite on cervical edges (P<0.05).Discussion. The precense of differences between the nature of materials and also the surface treatment such as primer or etchant application could influence the MICROLEAKAGE. The prescence of differences in reaction rate between the materials and the time that they reach to their adequate mechanical strength and adhesive bond strength lead to presence of differences between the effect of POLISHING time on the MICROLEAKAGE scores of materials.

Cites

THE EFFECT OF POLISHING TIME ON THE SHEAR BONDING STRENGTH OF RESIN COMPOSITE AND COMPOMER TO DENTIN

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APA: Copy

MORTAZAVI, V.A.S., FATHI, MOHAMMAD HOSSEIN, & BAKHTIAR, H.. (2002). EFFECTS OF POLISHING TIME AND THERMALCYCLINGON THE MICROLEAKAGE OF FOUR TOOTH –COLOURED DIRECT RESTORATIVE MATERIALS. JOURNAL OF RESEARCH IN MEDICAL SCIENCES (JRMS), 7(3), 236-242. SID. https://sid.ir/paper/26618/en

Vancouver: Copy

MORTAZAVI V.A.S., FATHI MOHAMMAD HOSSEIN, BAKHTIAR H.. EFFECTS OF POLISHING TIME AND THERMALCYCLINGON THE MICROLEAKAGE OF FOUR TOOTH –COLOURED DIRECT RESTORATIVE MATERIALS. JOURNAL OF RESEARCH IN MEDICAL SCIENCES (JRMS)[Internet]. 2002;7(3):236-242. Available from: https://sid.ir/paper/26618/en

IEEE: Copy

V.A.S. MORTAZAVI, MOHAMMAD HOSSEIN FATHI, and H. BAKHTIAR, “EFFECTS OF POLISHING TIME AND THERMALCYCLINGON THE MICROLEAKAGE OF FOUR TOOTH –COLOURED DIRECT RESTORATIVE MATERIALS,” JOURNAL OF RESEARCH IN MEDICAL SCIENCES (JRMS), vol. 7, no. 3, pp. 236–242, 2002, [Online]. Available: https://sid.ir/paper/26618/en

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