Quantcast Properties of Zinc Phosphate Cement - Dental Materials

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
a. Advantages. Some advantages of zinc phosphate cement as a cementing
medium are:
Inconspicuous appearance.
Speed and ease of usage.
(3)  Sufficient flow to form a thin layer for the cementing of closely adapted
crowns, fixed partial dentures, and inlays.
Low thermal conductivity beneath a metallic restoration.
b. Disadvantages. Some disadvantages of zinc phosphate cement as a
cementing medium are:
Low crushing strength that varies between 12,000 and 19,000 psi.
Slight solubility in mouth fluids.
Opaque material not suitable for visible surfaces.
c. Strength. The ratio of powder to liquid increases the strength of phosphate
cements to a certain point. For this reason, the dental specialist must use as thick a mix
as practical for the work being performed.
a. Chemical Reaction. The chemical reaction that takes place between the
powder and liquid of setting phosphate cement produces heat. The amount of heat
produced depends upon the rate of reaction, the size of the mix, and the amount of heat
extracted by the mixing slab.
b. Powder to Liquid Ratio. The less powder used in ratio to the liquid, the
longer the cement will take to harden. Good technique minimizes the rise in
temperature and acidity of the setting cement that can injure the pulp. Generally, for
increased strength, decreased shrinkage, and resistance to solubility, it is advisable to
blend as much powder as possible to reach the desired consistencies.
c. Setting Time. The setting time of zinc phosphate cement is normally
between 5 and 9 minutes. Four actions that may be taken to maintain and prolong the
normal setting time are given below.

Medical News
Researchers hope patent can pave way to future treatments of heart, lung disease
A Kansas State University research team has received a patent...
Low-dose lithium prevents Parkinson's symptoms in aged mice with a human mutation for the disease
Low-dose lithium prevented symptoms of Parkinson's disease in aged mice...
Athletes urged to drink when thirsty after Rottnest swim incident
Long distance swimmers are being urged to drink when they...
Is the government stalling on plain cigarette packaging?
We are still waiting to hear whether the UK government...
Christmas a risky time for vulnerable according to indigenous expert
Christmas is a risky time for many people, young and...
Instant noodles recalled as Taiwan food scare widens
Taiwanese authorities on Thursday ordered a leading food company to...
11th Sierra Leonean doctor dies from Ebola
One of Sierra Leone's most senior physicians died Thursday from...
Could trophoblasts be the immune cells of pregnancy?
Trophoblasts, cells that form an outer layer around a fertilized...
Cars carrying children to become smoke-free
New legislation has been announced that will make it illegal...
Chronic high blood sugar may be detrimental to the developing brain of young children
Young children who have long-term high blood sugar levels are...
In the battle against Ebola, a double-layer solution
When working with Ebola patients, protective gear works, but removing...
Natural quit smoking remedy more effective than nicotine replacement
New Zealand researchers have found that a low cost, plant-based...
New book examines shortcomings in US mental health system
In the months leading up to Myron May's shooting rampage...
Cells identified that enhance tumor growth and suppress anti-cancer immune attack
A study led by St. Jude Children's Research Hospital scientists...
European court rules obesity can be disability
The European Court of Justice says obesity can be a...
Study finds genetic clue to menopause-like condition in young women
Six young women with a disorder that mimics menopause have...
Healthy brain development balanced on edge of a cellular 'sword'
A new Yale-led study of children with neurodevelopmental abnormalities of...
Scientists investigate use of cognitive computing-based visual analytics for skin cancer image analysis
IBM announced today a collaboration with Memorial Sloan Kettering to...
From disgust to deceit – a shorter path than you might think
Feeling queasy? How about deceitful? New research shows feelings of...
3-D printed device relieves sleep apnoea
Sleep apnoea is a condition where the air passage in...

Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +