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Glass-ionomer cement liquid is()
A．aqueous silicon dioxide
B．a combination ofeugenol and phosphoric acid
C．a true natural colloidal liquid
D．an aqueous solution of polymers and copolymers of acrylic acid
答案
更多“Glass-ionomer cement liquid is（)A．aqueous silicon dioxideB．a combination ofeugenol and”相关的问题
第1题
The following is a description of a glass-ionomer cement’s fluoride release pattern()
A．initial low-rate release，foilowed by long，low-rate release
B．initial high-rate release，followed by long，low-rate release
C．high．rate release throughout the GIC’s lifetime
D．polycarboxylate cement
第2题
A．1ess expensive
B．more retentive
C．weaker
D．all ofthe above
第3题
A．the compressive strength of the cement is too low
B．cement interferes with the polymerization of the resin
C．zinc oxide and Bis-GMA form. a soluble compound
D．the cement increases the polymerization shrinkage of the resin
第4题
The strength of zinc phosphate cement is linearly related to its()
A．pH
B．powder-to-liquid ratio
C．fluoride content
D．glass content
第5题
A．the tooth will be sensitive
B．the bond needs time to mature
C．the crown may fracture
D．the cement shade will change drastically
第6题
A．spatulation time
B．liquid-powder ratio
C．temperature ofthe mixing slab
D．number and size ofpowder increments
第7题
Advantages of zinc polycarboxylate cement include which of the following()
A．kindness to the pulp
B．10ng working time
C．chemical adhesion to tooth structure
D．All of the above
第8题
If zinc phosphate cement is contaminated by moisture during setting()
A．its solubility increases
B．its hardness increases
C．its pH increases
D．its fluoride release increases
第9题
A．galvanic current
B．microleakage
C．hyper-occlusion ofthe crown
D．excess acid in cement
第10题
The amount offluoride released by a GIC()when intraoral pH decreases
A．increases
B．decreases
C．does not change
D．polycarboxylate cement
第11题
Wich of the following is FALSE concerning fluoride release and uptake with glass ionomers()
A．High level of fluoride is released initially
B．Sustained low levels of fluoride release over time
C．Fluoride release results in reduction of mechanical properties of the set cement
D．Recharge may be provided by topical fluorides
