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COMPARISON STUDY OF THE SHEAR BOND STRENGTH BETWEENPOLYETHER AND ADDITION SILICONE IMPRESSIONMATERIALS | ||
| Journal of Al-Nahrain University - Science | ||
| Article 1, Volume 12, Issue 3, 2009, Pages 56-63 | ||
| Author | ||
| Saad F. Oboudi | ||
| Abstract | ||
| AbstractThe impression material is used mainly in the area of removable partial and complete dentureand in the construction of inlays, crowns and bridges. They are used also in dental laboratories forduplicating master casts.Recent studies have evaluated the bond strength of selected impression materials. This researchwas performed to study the shear bond strength of impression materials to tray by testing fortysamples, each of which consisted of two blocks of acrylic with the impression material sandwichedbetween them. Tray adhesive was used to increase adhesion between impression material andcustom tray. Also this research showed that by the use of perforation impression materials adherefirmly to the impression trays. Therefore perforation - adhesive combination gave acceptableresults.Experimental results indicated that polyether impression material showed higher shear bondstrength values to cold-cure acrylic than addition silicone impression material for both control andperforated samples without adhesive application. The shear mean bond strength values of polyetherto the tray material after adhesive application were decreased. While, the shear mean bond strengthincreased significantly when addition silicone was used with the adhesive and with the combinationsamples. | ||
| Keywords | ||
| impression material; Shear bond strength; adhesive material | ||
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