Artículos de revistas
Effect of surface penetrating sealant on roughness of posterior composite resins
Registro en:
American Journal Of Dentistry. Mosher & Linder, Inc, v. 16, n. 3, n. 197, n. 201, 2003.
0894-8275
WOS:000184664900011
Autor
Dos Santos, PH
Consani, S
Sobrinho, LC
Sinhoreti, MAC
Institución
Resumen
Purpose : To verify the effect of surface penetrating sealant on the roughness of posterior resin-based composites before and after mechanical toothbrushing. Materials and Methods: 10 specimens of four different composites (Alert, Definite, Z100 and Prodigy Condensable) were made using a metal matrix (height 2 mm and diameter 4 nim). After 24 hours, the specimens were polished using Sof-Lex discs in sequence: coarse, medium, fine and superfine, each for 40 seconds and, immediately, one of the surfaces was covered with Protect-It surface sealant. All the specimens were examined with a profilometer to measure the initial surface roughness before mechanical toothbrushing at a constant speed of 250 strokes/minute with a total of 30,000 cycles, using a toothbrush and dentifrice containing calcium carbonate as abrasive, under a load of 200g. After toothbrushing the surface roughness was measured once again. The data were analyzed with ANOVA and the Tukey test at a 95% confidence level. Results: Mechanical toothbrushing increased the surface roughness of all the composites studied (Alert: 0.7303 +/- 0.0942 mum; Definite: 0.4961 +/- 0.1255 mum; Z100: 0.3428 +/- 0.0841 mum), with the exception of Prodigy Condensable (0.2782 0.0678 mum) (P > 0.05). The surface penetrating sealant effectively decreased the surface roughness for Alert (0.5435 0.2182mum) and Defmite (0.2956 +/- 0.0368 gm) (P < 0.05), but had no effect upon Z100 (0.3331 +/- 0.0565 mum) and Prodigy Condensable (0.2760 +/- 0.0920 mum) as these have smaller filler sizes than the other composites tested (P > 0.05). 16 3 197 201