By Carlos P. Bergmann;Aisha Stumpf
This booklet offers an advent to the mechanical habit and degradation of dental ceramics and publications the reader via their functionality lower than impact of oral environments. It addresses different sorts of dental ceramics, their houses, degradation and mechanical features with much less emphasys at the physics and chemistry concerned, which makes the analyzing attention-grabbing for rookies within the box. In each one bankruptcy, the reader will know about the mechanical habit of dental ceramics and every phenomenon enthusiastic about their program, in addition to discovering a few functional examples in their use in dental clinics, their production strategies and kinds of decay. The transparent language and the application-oriented standpoint of the e-book makes it compatible for either pros and scholars who are looking to know about dental ceramics.
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Extra resources for Dental Ceramics: Microstructure, Properties and Degradation
One of the apparatuses had inner and outer widths of 10 and 30 mm, respectively, and the other apparatus had inner and outer widths of 20 and 40 mm, respectively. The authors concluded that flexural strength decreases when the relative humidity is greater than 45 % compared with 10 % relative humidity. The resistance is also lower in the fourpoint bending tests on the apparatus with smaller dimensions, but this difference was not statistically significant. In another study, Cho et al. (2003) stated that the flexural strength of alumina decreases with rising temperature and humidity.
1 Crystalline structure of alumina Fig. 2 Typical alumina powder: raw material for alumina ceramic bodies Fig. 3 Relationship between porosity and KIC in alumina ceramic bodies exposed or not to acetic acid the microstructure of polycrystalline alumina as well as some of its properties depends on the additives and the residual presence of silicon and calcium oxides. These oxides are quite common and their control is critical. 1 Mechanical Behavior and Microstructure of Alumina Dental Ceramics 57 Fig.
On the brittleness of enamel and selected dental materials. Dental Mater. : Influence of microstructure and chemistry on the fracture toughness of dental ceramics. Dental Mater. : Relative fracture toughness and hardness of new dental ceramics. J. Prosthet. Dent. : Crack decorating technique for fracture-toughness measurement in alumina. J. Eur. Ceram. Soc. : Transverse strength of aluminous and feldspathic porcelain. J. Dent. Res. : Determining the slow crack growth parameter and Weibull two-parameter estimates of bilaminate disks by constant displacement-rate flexural testing.
Dental Ceramics: Microstructure, Properties and Degradation by Carlos P. Bergmann;Aisha Stumpf