Navigation Links
Home tooth bleaching slightly reduces enamel strength
Date:4/14/2009

COLUMBUS, Ohio New research shows that human teeth lost some enamel hardness after the application of several different products used in the home to whiten teeth. The study suggests that future generations of such products might be reformulated in an effort to reduce these side effects.

The researchers noted that teeth typically can restore their previous hardness after losing small amounts of enamel calcification. But this is the first study to show at a nanometer scale measuring in billionths of a meter how human teeth are affected by the popular home whiteners.

"There is some significant reduction in nano-hardness of enamel, but we are talking on a very minute scale. So even though it may not be visible to the human eye, it's important for research because that's how we improve products," said Shereen Azer, assistant professor of restorative and prosthetic dentistry at Ohio State University and lead author of the study.

Azer and colleagues applied the recommended treatments of five name-brand home whiteners to samples of human teeth and compared the effects to tooth samples that received no treatment. In all cases, the products reduced the hardness of the enamel as well as what is called the elastic modulus or stiffness, a measure of the ability of the tooth surface to bounce back in response to applied force.

Many studies have sought to determine how tooth whitening affects tooth enamel hardness, but results have been inconclusive. Azer said that previous studies measured the loss of enamel hardness in microns, or millionths of a meter, rather than on the nanometer scale used in his study.

"So this just gives us a better understanding of precisely how these products affect human teeth," he said.

The research is published in a recent issue of the Journal of Dentistry.

Tooth bleaching products contain solutions of various strengths of either hydrogen peroxide or carbamide peroxide, whi
'/>"/>

Contact: Shereen Azer
Azer.1@osu.edu
614-292-7467
Ohio State University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Modern lifestyle prevents tooth decay
2. Toothsome research: Deducing the diet of a prehistoric hominid
3. Drink brewed tea to avoid tooth erosion
4. International experts collect alpine fungi in Beartooth Mountains of Montana
5. Charcot-marie-tooth disease research funding
6. Blue light used to harden tooth fillings stunts tumor growth
7. Tooth loss strongly linked to risk of esophageal, head and neck, and lung cancer
8. NYU dental professor discovers biological clock linking tooth growth to other metabolic processes
9. Tooth Bank seeks milk teeth from 100,000 children
10. Long-term recovery of reefs from bleaching requires local action to increase resilience
11. New NOAA coral bleaching prediction system calls for low level of bleaching in Caribbean this year
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/4/2014)... Temple University School of Medicine announced today that ... initiative funded by the Bill & Melinda Gates ... Obstetrics, Gynecology and Reproductive Sciences; and Vice Chair ... School of Medicine will pursue an innovative global ... Biomarkers to Assess Fetal Neurodevelopment.", Grand Challenges Explorations ...
(Date:11/4/2014)... England , November 4, 2014 ... and vertical market growth   Fuel3D , ... has closed a funding round totaling $6.4 million (£4 million). ... million) funding secured earlier this year and paves the way ... in 2015. The funding round was led by ...
(Date:11/3/2014)... DUBLIN , Nov. 3, 2014 Research ... report "Cell Therapy - Technologies, Markets and Companies" ... evaluates cell therapy technologies and methods, which have already started ... Hematopoietic stem cell transplantation is replacing the old fashioned bone ... described. Cell therapy is bound to become a part of ...
Breaking Biology News(10 mins):Temple University School of Medicine receives Grand Challenges Explorations grant 2Fuel3D Secures $6.4 Million in Expansion Funding 2Fuel3D Secures $6.4 Million in Expansion Funding 3Global Cell Therapy - Technologies, Markets and Companies: 2014 Report 2Global Cell Therapy - Technologies, Markets and Companies: 2014 Report 3
... indicates that wild salmon may account for just 10 ... vast majority of the fish come from hatcheries. The ... decline in the population this year, which will probably ... and recreational salmon fishing. The role of ...
... 15 years of biodiversity and climate change research ... announced formation of its Asia Center to forge ... use of environmental resources. One of the first ... Philadelphia, is with Nanjing University, one of the ...
... Inzana, the Tyler J. and Frances F. Young Professor ... Pathobiology in the Virginia-Maryland Regional College of Veterinary Medicine ... the United States Department of Agriculture to study the ... Disease Complex (BRDC). The $374,000 grant will allow ...
Cached Biology News:Hatchery fish outnumber wild chinook salmon in troubled fall run 2Hatchery fish outnumber wild chinook salmon in troubled fall run 3Hatchery fish outnumber wild chinook salmon in troubled fall run 4Hatchery fish outnumber wild chinook salmon in troubled fall run 5Academy establishes Asia Center to protect the environment 2Academy establishes Asia Center to protect the environment 3Academy establishes Asia Center to protect the environment 4Veterinary college researchers explore function of biofilm in bovine respiratory disease 2
(Date:11/24/2014)... , UAE, November 24, 2014 ... "Sheikh Hamdan Bin Rashid Al Maktoum Awards for Medical ... Dubai, United Arab Emirates , on ... ) , The Carter Center which ... Services is actively involved in numerous programs that aim ...
(Date:11/24/2014)... (PRWEB) November 23, 2014 One of the ... of optics and photonics is now available to high school ... low cost. SPIE, the international society for optics and ... the complete SPIE Digital Library available to high ... , “Light-based technologies are integral to all areas of life ...
(Date:11/24/2014)... November 24, 2014 Senior Vice ... for dynamic leadership skills, business acumen ... medical information products and services, congratulates Diane Bartoli ... Reference and Workflow, Elsevier Clinical Solutions, for being recognized ... ® Awards issue of Profiles in Diversity ...
(Date:11/22/2014)... 2014 CannLabs, Inc. (OTCQB: ... and scientific testing methodologies relating to cannabis, today announced ... line of credit from an existing stockholder of the ... secured this commitment from one of our existing stockholders,” ... “This capital will help accelerate our planned expansions into ...
Breaking Biology Technology:Five US Winners Among Recipients of Hamdan Medical Awards 2SPIE Digital Library Now Available to High Schools, Two-Year Colleges at No or Low Cost 2Elsevier Clinical Solutions' Diane Bartoli Featured In Profiles in Diversity Journal's 13th Annual Women Worth Watching Issue 2Elsevier Clinical Solutions' Diane Bartoli Featured In Profiles in Diversity Journal's 13th Annual Women Worth Watching Issue 3CannLabs Secures $750,000 Line Of Credit 2
... /PRNewswire-FirstCall/ - The Board of Directors of,Neptune ... decided,not to re-price any options including the ... directors., About Neptune Technologies, Neptune ... for nutraceutical and pharmaceutical applications and is,sponsoring ...
... Trusted LASIK Surgeons launched its revolutionary Trusted LASIK Surgeons ... order to provide a resource for consumers seeking to ... directory apart is a unique screening process ensuring that ... Eye Surgery, Laser Surgeons in the United States are ...
... Shareholders to Reject Entire Management,Slate of InSite Vision, ... AUSTIN, Texas and HOUSTON, Sept. 11 PTV ... firm, is pleased to,announce that RiskMetrics Group -(Formerly ... corporate governance firm, recommended that the,stockholders of InSite ...
Cached Biology Technology:Neptune Technologies decided not to re-price options 2Trusted LASIK Surgeons Welcomes Leading LASIK Eye Surgery Expert, Inventor David Huang, M.D., Los Angeles, to Its Unique Lasik Directory Service 2Trusted LASIK Surgeons Welcomes Leading LASIK Eye Surgery Expert, Inventor David Huang, M.D., Los Angeles, to Its Unique Lasik Directory Service 3Trusted LASIK Surgeons Welcomes Leading LASIK Eye Surgery Expert, Inventor David Huang, M.D., Los Angeles, to Its Unique Lasik Directory Service 4Trusted LASIK Surgeons Welcomes Leading LASIK Eye Surgery Expert, Inventor David Huang, M.D., Los Angeles, to Its Unique Lasik Directory Service 5Trusted LASIK Surgeons Welcomes Leading LASIK Eye Surgery Expert, Inventor David Huang, M.D., Los Angeles, to Its Unique Lasik Directory Service 6Trusted LASIK Surgeons Welcomes Leading LASIK Eye Surgery Expert, Inventor David Huang, M.D., Los Angeles, to Its Unique Lasik Directory Service 7RiskMetrics (ISS), An Independent Proxy Advisory Firm, Recommends Voting the GOLD Card for Four of PTV's Nominees: Anderson, McInerney, Melrose, and O'Holla 2RiskMetrics (ISS), An Independent Proxy Advisory Firm, Recommends Voting the GOLD Card for Four of PTV's Nominees: Anderson, McInerney, Melrose, and O'Holla 3RiskMetrics (ISS), An Independent Proxy Advisory Firm, Recommends Voting the GOLD Card for Four of PTV's Nominees: Anderson, McInerney, Melrose, and O'Holla 4
... The enzyme glycerol 3-phosphate dehydrogenase ... phosphate (DHAP) and glycerol 3-phosphate, with ... increases significantly during differentiation of progenitor ... activity of this enzyme has been ...
... with an Affinity Chitin-binding Tag) utilizes the ... elements (termed inteins) to purify recombinant proteins ... 1 and 2). This system distinguishes itself ... ability to separate a recombinant protein from ...
... pET Host Strain Competent Cell Sets ... optimizing vector/host strain combinations The ... into E. coli is to ... can be prepared in the laboratory, greater ...
... EZ DNA Methylation Kit uses a simplified ... DNA methylation analysis. The kit is based ... place between cytosine and sodium bisulfite where ... DNA Methylation Kits innovative in-column desulphonation reaction ...
Biology Products: