Pulpal response after complete crown preparation, dentinal sealing, and provisional restoration.
This study evaluated the acute pulpal healing response following preparation, etching, and sealing of the prepared vital dentin with a 4-methacryloxyethyl trimellitate anhydride (4-META) bonding system. Adult monkey teeth received crown preparations with chamfer margins, prepared with a diamond used at ultra high speed with water cooling. Vital dentin was etched with 10% citric acid-3% ferric chloride, rinsed, and sealed with 4-META system. A provisional crown was formed with a low-viscosity light-curing adhesive resin. Teeth were fixed and evaluated histopathologically. Pulpal responses at 3 days showed only minimal disruption of the odontoblastic zone. At 7 days, the pulps presented reorganizing odontoblastoid cells, and, at 10 days, the pulps showed new odontoblastoid cells with a thin rim of reparative dentin. Pulps of crown preparations that were etched and then sealed with the 4-META system presented healing patterns similar to those of pulps associated with Class V preparations lined with calcium hydroxide, observed in (previous) similar studies.
Suzuki
S
S
Departments of Restorative Dentistry and Biomaterials, University of Alabama, Birmingham, School of Dentistry 35294-0007.
Cox
C F
CF
White
K C
KC
D000134:Acid Etching, Dental; D000818:Animals; D003442:Crowns; D003737:Dental Cavity Preparation; D003763:Dental Leakage; D003782:Dental Pulp / Q000503:physiopathology*; D003794:Dental Restoration, Temporary / Q000379:methods; D017220:Dentin-Bonding Agents; D008253:Macaca mulatta; D008689:Methacrylates; D009804:Odontoblasts; D016369:Smear Layer
C070606:Amalgambond; D017220:Dentin-Bonding Agents; D008689:Methacrylates