Due to its simple handling, outstanding appearance, lack of toxicity and biocompatibility, poly(methyl methacrylate) (PMMA) is commonly used in dental technology. As an ideal dental base, however, this material is still constrained by a few drawbacks, such as poor strength and radiopacity. Through using silica-based fillers, attempts to boost the mechanical and radiopacity characteristics of denture base materials are ongoing. While fillers based on silanated silica are frequently used, they are not sufficiently solid. They often present cracks that either break through the fillers of the glass or spread around the particles of the filler. Such a deficiency happens when, due to the hydrolytic degradation of silica fillers and silane-coupling agents, the dental composites are put in the aqueous oral environment. In the oral setting, the clinical issue of using silanes in adhesion promotion is bond degradation over time. Silanes, in addition, do not bind effectively to dental restorative composites based on nonsilica. The selection of appropriate materials is therefore very important in order to achieve better consistency between the phases of the composites, contributing to the promotion of the durability of the resulting materials. This chapter introduces fillers based on titanium as alternatives to silica fillers. It includes composite PMMA as a denture base, interfacial step and coupling agents, prothetic dentistry titanium-based fillers, titanium-treated titanium-based fillers. Because of their chemical compatibility and relatively high stability in a humid climate, titanates are found to be effective couplers in treating Ti-based fillers.
Author (s) DetailsNidal W. Elshereksi
Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 UKM Bangi, Selangor, Malaysia and Department of Dental Technology, College of Medical Technology, P.O.Box: 1458, Misurata, Libya.
Mariyam J. Ghazali
Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 UKM Bangi, Selangor, Malaysia.
Andanastuti Muchtar
Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 UKM Bangi, Selangor, Malaysia.
Che H. Azhari
Permata Insan College, Islamic Science University of Malaysia, Bandar Baru Nilai, 71800 Sembilan, Malaysia.
View Book :- https://stm.bookpi.org/AAER-V2/issue/view/31
No comments:
Post a Comment