全部床義歯のバレル研磨に関する研究　床用レジンの表面粗さと研削量について

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  • Study on Barrel Finishing of Complete Denture. Surface Texture and Cutting Depth of Denture Base Resin.
  • Surface Texture and Cutting Depth of Denture Base Resi
  • 床用レジンの表面粗さと研削量について

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We are attempting to apply barrel finishing to improve the surface texture of the basal surface of the complete dentures.<BR>The purpose of this study was to make sure the alteration of the surface texture and the cutting depth of denture base resin by barrel finishing. The board-shaped samples of denture base resin were used to investigate the alteration of the surface texture by barrel finishing, and cylindrical samples were used to measure the cutting depth. Half of the board-shaped samples were barrel finished and others were used as control samples. The upper surface of the cylindrical samples were masked by the adhesive tape except for the hole which has a diameter of 5 millimeters after being polished by the automatic polishing machine. First and second stage finishings were performed for 30 minutes respectively by the centrifugal barrel finishing apparatus.<BR>After measuring the surface roughness (Ra, Rmax) by the surface texture measuring instrument, samples were observed under the scanning electron microscope.<BR>The results were as follows:<BR>1. The surface roughness significantlydecreased by barrel finishing.<BR>2. The cutting depth by barrel finishing was 22.88±2.16μm (mean±SD).<BR>These findings suggests that barrel finishing is useful to improve the surface texture of the basal surface.

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