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document
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 . METHOD AND MATERIALS 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 .
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Intervention_Pharmacological
liquid-polish coating
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Intervention_Other
polymethyl methacrylate ( PMMA )
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Intervention_Physical
self-cured acrylic resin provisional crowns
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Intervention_Other
crown
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Intervention_Other
confocal laser scanning microscope
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Intervention_Other
scanning electron microscope
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Outcome_Physical
in vivo biofilm accumulation
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Outcome_Physical
Biofilm accumulation
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Outcome_Mental
provisional restorations
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Outcome_Physical
Biofilm , 250 Mum thick
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Outcome_Physical
bacterial accumulation
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Outcome_Physical
biofilm
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Outcome_Physical
biofilm formation
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Participant_Condition
provisional restorations :
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Participant_Age
polymethyl methacrylate ( PMMA ) self-cured acrylic resin provisional crowns .