IADR Abstract Archives
Alternative powder-free method for palatography using sandpaper
Objectives: Palatogram is an essential approach to evaluate the effectiveness of maxillofacial prosthetic treatment regard speech intelligibility. Conventionally, alginate powder is commonly used to visualize the tongue-palate contact where wetted areas of powder is indicated as palatography. However, this method has the risk of aspiration or discomfort. An alternative method is required. Therefore, sanded surface of denture base could provide an alternative method for visualizing wetness on the surface during palatography. This in vitro study aimed to examine the applicability of using sanded denture base for palatogram.
Methods: Twelve specimens of heat cured acrylic resin with the thickness of 2 mm were processed according to the manufacturer instructions. After polishing, each specimen’s surface was sanded by sandpaper starting from #320, #400, #500, #600, and #800 to #1000, respectively. Artificial saliva was then applied to wet the specimen’s surface. At intervals of each sanding step, the color of each specimen was measured using an electric colorimeter between two conditions dry and wet. The average level of L* a* b* were calculated by the colorimeter and recorded. The color difference (△E *) was then computed and statistical analyses were applied.
Results: All sanded specimens by different sandpaper grit size showed significant color difference in dry and wet conditions. Mean ΔE in each type of sandpaper ranged from 3.29 to 5.59. There was significant difference among ΔE between #320，#400，#500, #800 and #1000, in the pairs of #320, #400 and #800, and in the pairs of #320, #400 and #500. Sandpapers #320 and #400 were indicated more appropriated material for palatogram.
Conclusions: The result suggested that the sanded surface can produce visible color change on wetted surfaces and can be applied as a new method for palatogram.
Methods: Twelve specimens of heat cured acrylic resin with the thickness of 2 mm were processed according to the manufacturer instructions. After polishing, each specimen’s surface was sanded by sandpaper starting from #320, #400, #500, #600, and #800 to #1000, respectively. Artificial saliva was then applied to wet the specimen’s surface. At intervals of each sanding step, the color of each specimen was measured using an electric colorimeter between two conditions dry and wet. The average level of L* a* b* were calculated by the colorimeter and recorded. The color difference (△E *) was then computed and statistical analyses were applied.
Results: All sanded specimens by different sandpaper grit size showed significant color difference in dry and wet conditions. Mean ΔE in each type of sandpaper ranged from 3.29 to 5.59. There was significant difference among ΔE between #320，#400，#500, #800 and #1000, in the pairs of #320, #400 and #800, and in the pairs of #320, #400 and #500. Sandpapers #320 and #400 were indicated more appropriated material for palatogram.
Conclusions: The result suggested that the sanded surface can produce visible color change on wetted surfaces and can be applied as a new method for palatogram.