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Why would a dentist choose a polycarboxylate cement instead of zinc phosphate to permanently cement a crown?

A dentist may choose a polycarboxylate cement over zinc phosphate for cementing a crown if the tooth is sensitive to temperature changes since polycarboxylate cement has better thermal insulation properties. Additionally, polycarboxylate cement releases fluoride, which can help prevent decay around the tooth.


What are the disadvantages of cement?

Disadvantages of cement are,Cement are subjected to crackingIt is very difficult to provide idoneous curing conditionsNot ideal for situation when settlement is expected.


How is polycarboxylate made?

it is made by a machine ohh yea :))


What are the disadvantages of reinforced cement concrete?

it has only very litle tension resistance.


What are the disadvantages of white portland cement?

White Portland cement has several disadvantages, including its higher cost compared to ordinary gray cement, which can increase overall project expenses. It is also more sensitive to environmental conditions, requiring careful handling to avoid discoloration. Additionally, white cement may have lower strength properties and less availability in some regions, limiting its use in certain applications.


Zinc oxide cement?

Zinc phosphate and zinc polycarboxylate, or polyacrylate, cements are water-base acid cements that contain silicate fillers or metal oxide that are embedded in a salt matrix. They are used as dental cements.


What are the disadvantages of the concrete mixer?

Advantages: - can mix the cement with aggregates easily. - also can save time. - less energy is needed.


What are the disadvantages of using liquid solvent cement?

If you are careless, liquid cement has a way of getting where it shouldn't - as witness the many people on this site who want to know how to get it off cellphones, Blackberries, watches, hair, dogs and clothing.


What are the advantages and disadvantages of concrete mixer?

Advantages: - can mix the cement with aggregates easily. - also can save time. - less energy is needed.


What are the disadvantages of cement factory?

Cement factories have several disadvantages, including significant environmental impacts such as high carbon dioxide emissions and air pollution from dust and particulate matter. The extraction of raw materials can lead to habitat destruction and soil degradation. Additionally, the energy-intensive production process often relies on fossil fuels, contributing to climate change. Lastly, cement plants can adversely affect local communities through noise, traffic, and potential health issues associated with pollution.


What are the advantages and disadvantages of compacting concrete using a vibrator?

The main disadvantage of compacting concrete using a cement vibrator is the noise. The advantages of compacting concrete using a cement vibrator is to remove trapped air and excess water which then allows the concrete settle firmly.


What are the advantages and the disadvantages and advantages of frame structures?

advantages of a frame structure: cheap strong disadvantages of a frame structure: expensive advantages of a shell structure: unique strong disadvantages of a shell structure: expensive