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New method for stronger dental implants
Date:3/1/2012

Millions of people have bad teeth replaced with implants. Often following the procedure, they are unable to chew food for up to six months, until the implant has become fixated in the bone. Now, for the first time, a drug coating that has been tested on humans allows titanium screws to adhere to the bone better and faster. The Linkping researchers behind the method report that the results are good.

The study, led by Per Aspenberg, professor of orthopaedic surgery at Linkping University in Sweden, is published in the journal Bone and was highlighted in this week's edition of the British Medical Journal (BMJ).

The implants are screwed into the jawbone and provide purchase for artificial teeth. Using current technology, it may take four to six months before the bone surrounding the screw has healed and is strong enough so the patient can begin to benefit from surgery.

The coating, developed at Linkping University in Sweden, consists of a nanometre-thin layer of protein that attaches to the metal surface. Attached to the protein is a drug belonging to the bisphosphonates, usually used to treat osteoporosis. Several animal studies have shown that this method allows the bone surrounding the implant to rapidly become denser and stronger.

Now, for the first time, this method has been tested on humans. 16 patients each received two implants; one normal and a similar surface-treated implant as described above. Neither the patient nor the dental surgeon knew which was which. After six months it was noted that for 15 of the 16 patients the treated screw was markedly much better established. Already after two months X-ray images showed positive changes adjacent to the treated screws. No complications occurred.

"It is the first time ever anyone has succeeded in reinforcing the bone around an implant with localised medication", says Per Aspenberg, professor of orthopaedics, who devised the method of using bisph
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Contact: Per Aspenberg
per.aspenberg@liu.se
46-733-866-468
Linkping University
Source:Eurekalert

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