Science Friday: Will Better Cavity Filling Technology Make Dental Implants Obsolete?

Will Better Cavity Filling Technology Make Dental Implants Obsolete?Will dental implants be a thing of the past with the help of new dental technologies?

The University of Maryland School of Dentistry has announced that scientists using nanotechology have created the first cavity-filling composite that kills harmful bacteria and regenerates tooth structure lost to bacterial decay, as reported by Newswire.

“Rather than just limiting tooth decay with conventional fillings, the new composite is a revolutionary dental weapon to control harmful bacteria, which co-exist in the natural colony of microorganisms in the mouth,” says professor Huakun (Hockin) Xu, PhD, MS.

“Tooth decay means that the mineral content in the tooth has been dissolved by the organic acids secreted by bacteria residing in biofilms or plaques on the tooth surface. These organisms convert carbohydrates to acids that decrease the minerals in the tooth structure,” says Xu, director of the Division of Biomaterials and Tissue Engineering in the School’s Department of Endodontics, Prosthodontics and Operative Dentistry.

After a dentist drills out a decayed tooth, the cavity still contains residual bacteria. Xu says it is not possible for a dentist to remove all the damaged tissue, so it’s important to neutralize the harmful effects of the bacteria, which is just what the new nanocomposites are able to do.

The researchers also have built antibacterial agents into primer used first by dentists to prepare a drilled-out cavity and into adhesives that dentists spread into the cavity to make a filling stick tight to the tissue of the tooth.

“The reason we want to get the antibacterial agents also into primers and adhesives is that these are the first things that cover the internal surfaces of the tooth cavity and flow into tiny dental tubules inside the tooth,” says Xu. The main reason for failures in tooth restorations and secondary caries or decay at the restoration margins. “Applying the new primer and adhesive will kill the residual bacteria,” he says.

Fillings made from the School of Dentistry’s new nanocomposite, with antibacterial primer and antibacterial adhesive, should last longer than the typical five to 10 years, though the scientists have not thoroughly tested longevity. Xu says a key component of the new nanocomposite and nano-structured adhesive is calcium phosphate nanoparticles that regenerate tooth minerals. The antibacterial component has a base of quaternary ammonium and silver nanoparticles along with a high pH.

The alkaline pH limits acid production by tooth bacteria.

“The bottom line is we are continuing to improve these materials and making them stronger in their antibacterial and remineralizing capacities as well as increasing their longevity,” Xu says.

The new dental products have been laboratory tested using biofilms from saliva of volunteers. The Xu team is planning to next test its products in animal teeth and in human volunteers in collaboration with the Federal University of Ceara in Brazil.

The University of Maryland has patents pending on the nanocomposite and the primer and adhesive technologies, according to Nancy Cowger, PhD, licensing officer with the University’s Office of Technology Transfer (OTT).

Licensing opportunities are available, she says, and potential development partners are invited to contact the OTT at

Source: Dental Fillings That Kill Bacteria and Re-Mineralize the Tooth

Dental Implant or Dental Bridge? Patients Feel Bite of Recession

Dental implants and dental bridges: a hard choice when money is tightMore than half of dentists surveyed (55%) said they have noticed more patients opting for dentures and/or dental bridges over dental implants as a result of the recession.

Here’s what dentists have to say about how the economy affects dental implant treatment:

  • “We all know that a single tooth implant is the best solution for a missing tooth. Our office has priced the single implant and restoration (including the abutment if needed) exactly the same as a three unit dental bridge.” (Alaska dentist)
  • “Some patients are opting for no treatment.” (New Jersey dentist)
  • “People are still finding insurance coverage for bridges, and even though the patients still would rather have the implant, they are electing bridges for financial considerations.”
  • “People are still doing dental treatment, but case sizes accepted are generally smaller.” (Tennessee dentist)

Just a thought…. I wonder if there’s any increase in demand for mini dental implants as a less expensive treatment alternetative to regular dental implants?

Read more: Dental Implants – In a Recession, Many Patients Choose Dental Bridges

Dental Implants Simplified: Matches Consumers to Implant Dentists

Dental Implant Find a Dentist Website

Consumer portal website provides local listings of dentists who offer implant dentistry, as well as a variety of other dental implant resources. Consumer Information PortalThe Internet Dental Alliance announces the re-launch of its consumer information website The website offers patients a variety of implant dentistry resources. Patients can find a properly trained implant dentist, learn more about dental implants, ask questions of an expert dentist, and more.

The find-a-dentist website also offers up fascinating facts. For example, teeth implants that are over 1,000 years old have been found from the Mayan civilization. Tooth-shaped pieces of shell were found placed into the sockets of missing incisors and had actually been incorporated into the bone structure.

Learn more about the dental implant portal website


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