Grape extract increases durability of tooth restorations, says USP (São Paulo University)
A study of the Dental School, University of São Paulo in Ribeirão Preto (São Paulo) concluded that the application of grape seed layer in dental restorations with resin provides more durability to treatment. According to the researchers, the compound is rich in natural antioxidants, able to increase the strength of dentin, preventing deterioration.
The uses of grape seed extract may cause patients need less exchange restorations. The finding, however, does not interfere with frequent visits to the dentist.
The durability of the material used in restorations after treatment of cavities is a major problem faced by professionals. Because it generates extra costs and the deterioration can cause infiltrations in the tooth bringing losses to the mouth´s health. Dentists recommend that the restorations should be replaced every 8 years.
The work done in conjunction with the University of Illinois at Chicago, USA, the researcher Ana Beatriz Silva Sousa used 48 human teeth free of decay and no restoration. They were separated into four groups - one received no application or solution, and on the other three was applied to chlorhexidine, doxycycline, commonly used in the restoration, and the solution with grape seed extract.
Then, all the teeth were restored by the traditional way and subjected to the artificial saliva and a similar method to wear. The study showed that the teeth receiving grape seed extract had 80 % less wear than those who received the common restorations.
The researcher says there is a breakdown between the union of the restorative material and the tooth. "These agents (grape antioxidants) act by decreasing this degradation, which leads to a restoration with greater longevity."
Ana Beatriz explains that grape seed extract substances are capable of increasing the strength of dentin, a component of tooth. "It can also help in other ways. The dentin´s collagen can be enhanced by the use of materials the flavonoid base," she says.
According to the research coordinator Fernanda Panzeri, the next step is to make the extract most appropriate to the aesthetic standards, since the product has reddish color, characteristic of the grape. "For an adequate restoration without the interference of the product color, we have to change color, turning into a closest color of the tooth restoration, to allow greater durability with restoration, but without interfering with the aesthetics of patient," she says.
The forecast, according to the researchers, is that the product reaches the market in the next two years.
Image: Valdinei Malaguti/EPTV