An In Vitro Study In Microleakage Of Two Kinds Of Commonly Used Dental Filling Materials

Objective:To observe the microleakage of GC FujiⅡglass ionomer and Charsma cmposite resin filling in vitro, then to compare the marginal sealing from the two materials. Methods:Forty molars without dental caries were prepared clean, with the same cavity shape (classⅠ) were divided into A and B groups equalling at randon (20 molars each group), which were then respectingly divided into one experiment group and one control group. Next, cavity hole were filled with GC FujiⅡglass ionomer in group A, but filled with Chersma composite resin in group B. After that, every experiment group (A2, B2) were seperately coated with valseline and the adhesive, nothing done with the control group (A1, B1). Make sure everthing below was complete, kept the samples of each group into a 2% solution methylene blue that soaked for twenty four hours. Removed the dye that stay at the surface of the water to be clean, to be dry, cut open. At last, to observe and photograph into a computer, and used the software Adobe Photoshope CS3 to measure the dye penetration depth between the cavity hole wall and the filllings, also analyzed statistically by rating information on diverse groups of the rank and T-tasting. Resules:Different dye penetration degrees were shown between filling materials and cavity walls among each group, while the degrees of dye penetration of experiment groups (A2, B2) were significantly slighter that of corresponding control group (A1, B1) (P<0.05). Conclusion:To determine coating vasline at once as the antiwetress adhesive while cavity hole is filled with GC FujiⅡglass ionomer, to improve the marginal sealing of GC FujiⅡglass ionomer, coating the adhesive while filling with Charsma composite resin, to reduce the occur of microleakage.