The effect of dentine surface treatment on pulpward pressure transmission during crown cementation: a laboratory study.
Thirty extracted human premolars received standardised full crown preparations. The teeth were randomly assigned into three groups: smeared (control), etched (phosphoric acid gel), and bonded (Scotchbond MP). Each tooth was perfused with saline to establish perfusion rates at baseline for all groups, and the post-etching stage for etched and bonded groups, post-bonding stage for bonded group, and post-cementation stage for all groups. Crowns made with four layers of die-spacing were cemented with zinc phosphate cement at 100N. Pulpal pressures were measured with a pressure transducer. It was concluded that dentine bonding agents may have the potential to reduce pulpal damage caused by pressure transmission from cementation.
Lam
C W
CW
School of Dental Science, University of Melbourne, Victoria, Australia.
Wilson
P R
PR
D000134:Acid Etching, Dental; D000293:Adolescent; D001641:Bicuspid; D002484:Cementation; D002648:Child; D003442:Crowns; D001840:Dental Bonding; D003782:Dental Pulp / Q000502:physiology*; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents; D005782:Gels; D006801:Humans; D010756:Phosphoric Acids / Q000008:administration & dosage; D011312:Pressure; D019279:Resin Cements; D016369:Smear Layer; D019231:Tooth Preparation, Prosthodontic / Q000379:methods*; D015036:Zinc Phosphate Cement
D017220:Dentin-Bonding Agents; D005782:Gels; D010756:Phosphoric Acids; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; D015036:Zinc Phosphate Cement