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.
School of Dental Science, University of Melbourne, Victoria, Australia.
C W
CW
Lam
P R
PR
Wilson
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