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Novel hydrogel systems for dentin regeneration
Date:7/4/2008

Toronto, ON, Canada Dental caries, or tooth decay, continues to be the most prevalent infectious disease in the world, presenting significant public health challenges and socio-economic consequences. It leads to the loss of the hard tissues of the tooth, followed by inflammation and necrosis of the subjacent dental pulp. In the U.S. alone, over 20 million dental restorations are placed each year, with failure rates of up to 60%. Hence, there exists a critical need for better biologic therapeutics to restore the damaged dentin-pulp complex to its original form and function. However, progress in this area has been slow compared with that in other fields of regenerative medicine.

Tissue-engineering strategies directed at mimicking the natural extracellular matrix have utilized synthetic and non-synthetic scaffolds to direct cell differentiation and matrix mineralization (in the case of bone). The most promising among the new generation of delivery systems are synthetic peptide hydrogels, which provide a nanostructured matrix highly similar to natural matrix. Short peptides can be designed to self-assemble into nanofibers, form macroscopic gels, and entrap living cells. With single amino acids as building blocks, the resulting materials are non-toxic, non-inflammatory, and biodegradable. The modular concept allows for high control over the system and, at the same time, makes it extremely versatile.

Speaking today during the 86th General Session of the International Association for Dental Research, a team of investigators from Baylor College of Dentistry (Dallas), the University of Regensburg (Germany), and Rice University (Houston) presents its preliminary data describing the results of studies on hydrogels made of peptide amphiphiles, where a short peptide sequence is attached to a fatty acid, which provides the driving force for self-assembly. However, they recently applied a different design concept, where the self-assembly of pept
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Contact: Linda Hemphill
lhemphill@iadr.org
International & American Association for Dental Research
Source:Eurekalert

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