2-HEMA-free dentin bonding system to prevent contraction gap.
The effects of 2-hydroxyethyl methacrylate (2-HEMA) both in the primer and in the commercial dentin bonding agent on the efficacy of the dentin bonding system was evaluated by measuring the polymerization contraction gap width of a commercial resin composite restored in a cylindrical dentin cavity prepared in an extracted human molar. Contraction gap formation was prevented in the group of the EDTA-conditioning followed by glyceryl mono-methacrylate, ethylene glycol and 1,6-hexanediol priming regardless of the 2-HEMA content in the dentin bonding agent containing 10-methacryloxydecyl dihydrogen phosphate. However, gap formation could not be prevented completely by the 2-HEMA priming. Therefore, it was possible to conclude that 2-HEMA was neither essential in the primer nor in the dentin bonding agent because of its low bonding efficacy and the resulting side effects on skin tissue as a delayed allergic reaction.
Ohba
M
M
Department of Operative Dentistry, Showa University, School of Dentistry, Tokyo, Japan.
Manabe
A
A
Itoh
K
K
Hisamitsu
H
H
Wakumoto
S
S
D001840:Dental Bonding / Q000379:methods; D018772:Dental Marginal Adaptation; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D004492:Edetic Acid; D006801:Humans; D008689:Methacrylates / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry
D017220:Dentin-Bonding Agents; D008689:Methacrylates; D019279:Resin Cements; C074669:Clearfil Photo Bond; C005044:hydroxyethyl methacrylate; D004492:Edetic Acid