Navigation Links
Tougher Fiber Dental ‘bridges’ for a Brighter Smie

A tough fiber re-inforced dental material has been developed by, a professor of structural engineering,// Vistasp Karbhari, at UC San Diego. This same lightweight material is used in civil, automotive aerospace, and marine applications. Since they work very well in highway bridges, Professor Vistasp Karbhari was motivated to try it out for dental bridges as well.

Karbhari along with Howard Strassler professor and director of Operative Dentistry, from the University of Maryland Dental School, are the authors of this study. The report of this research is scheduled to be published in Dental Materials. The report will give the results of tests that compare dental composites containing glass fibers and the type made of polyethylene fibres usually used to make bulletproof vests.

Karbhari and Strassler found that the toughness of fiber-reinforced dental materials depends on the type and orientation of the fiber used. Their report, available at the Dental Materials website, shows that braided polyethylene fibers performed the best, boosting toughness by up to 433 percent compared to the composite alone. Many of the strength and durability tests reported in the paper are not currently required by the U.S. Food and Drug Administration (FDA), which regulates dental composites as class II prescription devices. The agency requires eight minimum tests plus biocompatibility tests to ensure that dental composites are safe and nontoxic.

'Fiber-reinforced composites are now widely used in the aerospace and automotive industries and the experience we’ve gained in these applications can be applied in a more rigorous way in dentistry and medicine to tailor performance to exacting requirements,' said Karbhari. Dentists began using particle filled composites 10 years ago as an alternative to ceramics and mercury-containing metal amalgams. Strassler selected three commercially available fiber-reinforced composites for analysis.

Dental compos ites made with glass or polyethylene fibers are sold as pliable ribbons that dentists mold into the required shape and then harden with curing lights. 'Many reinforcing fibers can add strength and toughness to dental composites,'Karbhari said, 'but if they are improperly aligned they could actually accelerate damage to existing teeth.'

'What’s been missing until now is a rigorous, reproducible way to test the durability and resistance to breakage for these materials,'Strassler said. 'Makers of fiber-reinforced dental composites need a much better understanding of how their products actually perform as part of a restoration, crown, or bridge, and this study provides an analytical standard with which all composites should be evaluated in the future.'

The three products tested were a 3-millimeter-wide ribbon of unidirectional glass fibers, a 3-millimeter-wide ribbon of polyethylene fibers woven in a figure-8 stop-stitch leno-weave, and a 4-millimeter wide ribbon of polyethylene fibers woven in a biaxial braid. The resistance to breakage and various measures of toughness of the three preparations were compared to the dental composite alone. 'All three fiber fabrics dramatically increased the durability and strength of the dental composite, but the polyethylene fibers braided in a biaxial ribbon performed best,'said Karbhari. 'The tests required by the FDA indicate that fiber-reinforced composites are safe, but those tests are only partially informative. Our analyses show that we can optimize these materials to match and improve performance of teeth, for greater durability, toughness, and resistance.



Source-Eurekalert
MS
'"/>




Related medicine news :

1. BJP Seeks Tougher Laws Against Pre-Natal Sex Tests
2. Tougher Guidelines Needed To Prevent Variant Creutzfeldt-Jakob Disease
3. Tougher Smoking Ban for British Columbia Smokers
4. Risk of Cancer can be reduced to 40% with a High Fiber Diet
5. Eating Fiber Reduces The Risk Of Heart Disease
6. High Fiber Diet Found To Protect The Heart
7. Kids Not Getting Enough Fiber
8. High Dietary Fiber Reduce The Risk Of Heart Disease
9. High Fiber Diet to Fight Colon Cancer
10. Scientists Coax Nerve Fibers to Regrow After Spinal Cord Injury
11. Fiber And Fruit Key To Normal Weight
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/29/2017)... ... May 29, 2017 , ... A New York high ... 6 month test of the effectiveness of Artificial Intelligence (AI) in helping nudge men ... health game,’ said Wayne Hartrick, President of the Canadian Men’s Health Foundation (CMHF), whose ...
(Date:5/28/2017)... Winter Haven, FL (PRWEB) , ... May 28, ... ... Physician Partners of America (PPOA), is proud to announce that Sheldon K. Cho, ... on comprehensive interventional pain management, a specialty that concentrates on minimally invasive techniques ...
(Date:5/27/2017)... ... ... From May 21-23, hearing healthcare professionals gained a competitive edge with training ... Syracuse Downtown Hotel in Syracuse, New York. , As EarQ’s technology partner, Oticon ... to help them stay ahead in the industry. At the event, EarQ members learned ...
(Date:5/26/2017)... ... May 26, 2017 , ... ... a new educational seminar to focus on current legislative activity and the latest ... begin at 1 p.m. Sunday, Sept. 10, and will continue through Monday, Sept. ...
(Date:5/26/2017)... Nevada (PRWEB) , ... May 26, 2017 , ... ... produce the first ever copper, antimicrobial, mesh back 24/7 task chair specifically designed ... conference applications. “We are thrilled to partner with Cupron® to provide customers ...
Breaking Medicine News(10 mins):
(Date:5/15/2017)... -- Enterin Inc., a privately-held CNS pharmaceutical company based in ... treat Parkinson,s disease (PD), has enrolled the first patient in ... controlled, multicenter study involving patients with PD and taking place ... a 9-to-12-month period. The first stage is open label and ... sites include Denver , Boca ...
(Date:5/10/2017)... 10, 2017  The Corporate Whistleblower Center says, ... sleep therapy clinics to call us anytime at ... is involved in a substantial scheme to overbill ... from an employee of a medical equipment company ... to provide medical practice groups with extra generous incentives ...
(Date:5/9/2017)... , May 9, 2017  Oramed Pharmaceuticals ... ), a clinical-stage pharmaceutical company focused on the ... that the Canadian Intellectual Property Office has granted ... Oral Administration of Exenatide". The patent covers Oramed,s ... GLP-1 is an incretin hormone that ...
Breaking Medicine Technology: