Abstract
Proanthocyanidin (PA), a plant flavonoid, has recently been used in adhesive and restorative dentistry as a natural collagen cross-linking agent. As the long-term stability of the resin-bonded dentin is still questionable due to hydrolysis of collagen by collagenolytic enzymes, the use of collagen cross-linking agents has been proposed to enhance mechanical properties of dentin matrix and reduce biodegradation rates of collagen. Therefore, this paper discusses the chemistry and properties of PA, its role in stabilizing the bonded interface and enhancing the clinical longevity of adhesive restorations, and also considers various factors related to its incorporation in the bonding protocol.
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