Ultramorphological characterization of the resin dentin interface--an in vitro analysis of nanoleakage patterns of dentin adhesives.
OBJECTIVE
The requirements of an effective dentin adhesive system include the ability to thoroughly infiltrate the collagen network and partially demineralized zone, to encapsulate the collagen and hydroxyapatite crystallites, to produce a well polymerized durable hybrid layer with high bond strengths. Microleak-age and marginal percolation are the most detrimental factors thwarting the success of any restoration. However the presence of leakage pathways, called nanoleakage have been observed in the hybrid layer, even in the absence of microleakage. The nanoleakage patterns of four dentin adhesives (Prime & Bond NT, AdheSE, Clearfil S3 bond and Fuji Bond LC) was compared using Scanning electron microscopy and Energy Dispersive Spectroscopy, by the silver nitrate penetration method.


CONCLUSIONS
The results indicated that etch and rinse adhesives showed the maximum nanoleakage followed by the self etch systems. The glass ionomer based bonding agents showed the least nanoleakage. It is extremely important to take nanoleakage as a consideration while choosing dentin adhesives, to ensure success of the restoration.
Neelakantan
Prasanna
P
Department of Conservative Dentistry and Endodontics, College of Dental Surgery, Saveetha University, Chennai, Tamil Nadu, India. prasu_endo@yahoo.com
Sanjeev
Kavitha
K
Rao
C V Subba
CV
D045662:Dental Etching / Q000379:methods; D003763:Dental Leakage / Q000175:diagnosis / Q000517:prevention & control; D003804:Dentin / Q000648:ultrastructure*; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D006801:Humans; D055115:Light-Curing of Dental Adhesives; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements; D012834:Silver; D012835:Silver Nitrate
D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D019279:Resin Cements; C000212:ammoniacal silver; D012834:Silver; D012835:Silver Nitrate