Physical properties and fracture surface of acrylic denture bases processed by conventional and vacuum casting fabrication technique

Kassim, Noraniah and Wahab, Md Saidin and Yusof, Yusri and Rajion, Zainul A. and Sahar, A. Jumali (2011) Physical properties and fracture surface of acrylic denture bases processed by conventional and vacuum casting fabrication technique. In: Proceeding of the 12th International Conference on QiR (Quality in Research), 4-7 July 2011, Bali, Indonesia.

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Abstract

The purpose of this paper is to present the different properties and the fractured surface of denture base resin using different process fabrication technique, it also aims to determine the suitablality denture material used in vacuum casting technique. Thirty rectangular specimens were fabricated by conventional denture fabrication for (Impact rapid repair material) heat cure in water bath polymerized and cold cure in autiopolymerized, then specimences were fabricated by using vacuum casting technique for cold cure resin (Vertex Castavaria) with condition of no degassing, degassing at 20 sec and 40 sec. The mechanical properties; impact strength, flexural strength and hardness of the fabricated samples were evaluated using Impact Charpy test, three point bending test and Vickers hardness test respecticely. The fractured surface were observed by using SEM. The results were analyzed by one way ANOVA with (α=0.05). It was found that the cold cure resin produced in vacuum casting process has a lower impact strenght as compared to autiopolymerized process. However, the flexural strength had increased and the porosity also deacreased when the degassing time condition increased. The finding shows that the cold cure resin (Vertex castavaria) had longer pouring time than other cold cure material. This makes the material is suitable for vacuum casting technique.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:denture base; physical properties; conventional technique; vacuum casting technique; fracture surface
Subjects:T Technology > TP Chemical technology
Divisions:Faculty of Mechanical and Manufacturing Engineering > Department of Manufacturing and Industrial Engineering
ID Code:2005
Deposited By:Normajihan Abd. Rahman
Deposited On:05 Oct 2011 11:25
Last Modified:05 Oct 2011 11:25

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