Quantcast Physical Properties of Amalgam. - Dental Materials

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
PROPERTY
INGREDIENT
Silver
Tin
Copper
Zinc
Strength
Increases
Durability
Increases
Hardness
Increases
Expansion
Increases
Decreases
Increases
Flow
Decreases
Increases
Decreases
Color
Imparts
Setting time
Decreases
Increases
Decreases
Workability
Increases
Increases
Cleanliness
Increases
Table 1-1. Effects on properties of an amalgam restoration imparted by ingredients.
d. Physical Properties of Amalgam. The most important physical properties of
amalgam are flow and creep, dimensional change, and strength.
(1)  Flow and creep. Flow and creep are characteristics that deal with an
amalgam undergoing deformation when stressed. The lower the creep value of an
amalgam, the better the marginal integrity of the restoration. Alloys with high copper
content usually have lower creep values than the conventional silver-tin alloys.
(2)  Dimensional change. An amalgam can expand or contract depending
upon its usage. Dimensional change can be minimized by proper usage of alloy and
mercury.
(3)  Compression strength. Sufficient strength to resist fracture is an
important requirement for any restorative material. At 50 percent mercury content, the
compression strength is approximately 52,000 pounds per square inch (psi). In
comparison, the compressive strength of dentin and enamel is 30,000 psi and 100,000
psi, respectively. The strength of an amalgam is determined primarily by the
composition of the alloy, the amount of residual mercury remaining after condensation,
and the degree of porosity in the amalgam restoration.
MD0502
1-6



Medical News
Breast cancer survivors may have higher thyroid cancer risk
(HealthDay)—Women who survive breast cancer may have a higher-than-average risk...
medicalxpress.com
First device approved for dialysis-related amyloidosis
(HealthDay)—The U.S. Food and Drug Administration has approved the first...
medicalxpress.com
Turkey farms boost precautions after deadly flu strain found
Minnesota turkey farmers are increasing precautionary measures after a highly...
medicalxpress.com
Chromosomal rearrangement is the key to progress against aggressive infant leukemia
The St. Jude Children's Research Hospital—Washington University Pediatric Cancer Genome...
medicalxpress.com
Review article provides new insights on how tumors metastasize
In a review article recently published in the journal Clinical...
medicalxpress.com
M-MDSCs shut down arthritis in mouse model of the disease
Using a mouse model of rheumatoid arthritis, scientists have discovered...
medicalxpress.com
Last surgeries underway in 12-person kidney transplant chain
Surgeons have started the final operations in an organ donation...
medicalxpress.com
Asexuality: “That doesn’t mean there is something wrong”
As a scholar with ties in both humanities and medicine,...
scopeblog.stanford.edu
Extended pre-cessation bupropion helps smokers quit
(HealthDay)—Extended pre-quit bupropion is associated with reduced smoking behavior during...
medicalxpress.com
Various factors influence central cord syndrome management
(HealthDay)—For patients with central cord syndrome (CCS), patient, surgical, and...
medicalxpress.com
Pneumonia in early childhood tied to higher odds of asthma
(HealthDay)—Children who contract pneumonia during the first three years of...
medicalxpress.com
More otologic symptoms, hearing loss for HIV-infected
(HealthDay)—Otologic symptoms and hearing loss are more common among patients...
medicalxpress.com
Short-chain fatty acids in diet stimulate fat utilization
(HealthDay)—Short-chain fatty acids (SCFAs), the main products of dietary fiber...
medicalxpress.com
Medical device surveillance on the horizon
Thousands of people around the world have been exposed to...
medicalxpress.com
Gross Anatomy: Rare Alga Growth From Human Tissue Sample
(MedPage Today) -- The culture was negative, so what's all...
medpagetoday.com
National hospital rating systems rarely in agreement
(HealthDay)—National hospital rating systems are rarely in agreement, according to...
medicalxpress.com
A sense of purpose may help your heart
(HealthDay)—Living your life with a strong sense of purpose may...
medicalxpress.com
High Costs Attributed to Endocrine Disruptors (CME/CE)
(MedPage Today) -- Hormone-altering chemicals said to cost Europe over...
medpagetoday.com
FDA launches first app to identify drug shortages
(HealthDay)—A mobile phone application (app) has been released to identify...
medicalxpress.com
Risk of breast cancer in transgender persons—a study of veterans
A study of breast cancer in transgender veterans has identified...
medicalxpress.com
 


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 +