Effect of liquid-polish coating on in vivo biofilm accumulation on provisional restorations: part 1.
OBJECTIVE
Biofilm accumulation on provisional restorations may affect the surrounding tissues' integrity. The purpose of this study was to test in vivo biofilm formation on polymethyl methacrylate (PMMA) self-cured acrylic resin provisional crowns.


METHODS
Three types of PMMA surfaces were tested: (1) polished, (2) polished and coated with bonding agent, and (3) polished and coated with light-cured liquid polish. After 12 hours in the oral cavity, the crown was removed and examined by confocal laser scanning microscope (CLSM) and scanning electron microscope (SEM).


RESULTS
Biofilm, 250 Mum thick, was observed with CLSM on the polished acrylic surface. Significantly less bacterial accumulation was observed on the crowns coated with bonding agent, whereas no biofilm was observed on the crowns coated with liquid polish (P <.001). SEM examination confirmed these findings.


CONCLUSIONS
Bonding resin or liquid polish coatings significantly reduce early biofilm formation, which in turn might affect the overall plaque accumulation on provisional restorations.
Perez Davidi
Michael
M
Department of Prosthodontics, Faculty of Dentistry, Hadassah-Hebrew University Medical Center, Jerusalem, Israel.
Beyth
Nurit
N
Sterer
Nir
N
Feuerstein
Osnot
O
Weiss
Ervin I
EI
D000179:Acrylates / Q000627:therapeutic use; D000180:Acrylic Resins; D001422:Bacterial Adhesion; D018441:Biofilms; D003442:Crowns / Q000382:microbiology*; D003773:Dental Plaque / Q000382:microbiology / Q000517:prevention & control*; D003794:Dental Restoration, Temporary; D006801:Humans; D008689:Methacrylates / Q000627:therapeutic use; D018613:Microscopy, Confocal; D008855:Microscopy, Electron, Scanning; D010756:Phosphoric Acids / Q000627:therapeutic use; D019279:Resin Cements / Q000627:therapeutic use*; D018709:Statistics, Nonparametric
D000179:Acrylates; D000180:Acrylic Resins; C481141:BisCover; C113072:EBS adhesive system; D008689:Methacrylates; D010756:Phosphoric Acids; D019279:Resin Cements