Effect of different mixing and curing methods on the mechanical properties of denture base resin
10.3321/j.issn:1002-0098.2008.09.014
- VernacularTitle:四种加工方式对基托树脂力学性能的影响
- Author:
Wen-Jing JIN
1
;
Jun XU
;
Zhi-Hui SUN
Author Information
1. 北京大学口腔医学院
- Keywords:
Mechanics;
Arylie resins;
Dental materials
- From:
Chinese Journal of Stomatology
2008;43(9):564-565
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the differences between the mechanical properties of demure base processed by traditional mixing and malaxation method, and by traditional hot water polymerization and electrical heatopolymerization. Methods Samples used in this investigation were commercial acrylic denture base resin made by using two different mixing methods, and by using two different curing methods. The samples were assigned to 4 test groups. Group 1 : traditional mixing + hot water polymerizetion. Group 2:malaxation + hot water polymerization. Group 3 : traditional mixing + electrical heat-polymerization. Group 4: malaxation + electrical heat-polymerization. Surface hardness, flexural strength, flexural modulus, and impact strength were tested of each sample. Results The mean of the four groups' surface hardness was 19.4,21.2,22. 3,23.2 N/mm2 ,and of flexural strength was 58.58,63.32,66.73,63.76 MPa,and of impact strength was 1.42, 1.53, 1.77,1.78 KJ/m2, and of flexural modulus was 2311.38,2417.82,2566.36, 2400.37 MPa. Conclusions Surface hardness and impact strength of malaxation method + electrical heat-polymerization group are higher than those of traditional mixing + hot water polymerization group.
