title: Measurement of preventive resin restorations using computer profilometry.
abstract: The amount of extracoronal material placed when a tooth is restored with a preventive resin restoration (PRR) was quantitatively measured together with the projected area of each cavity preparation. Thirty-three patients (mean age 11 yrs, 6 mos) requiring a PRR on a lower first permanent molar were selected. Impressions of the teeth were made with polyvinylsiloxane before and after cavity preparation and then restored with P-50 and Concise sealant. Following occlusal adjustment, a third impression was taken. Replicas were digitized using computer profilometry. Computer images of occlusal surfaces were superimposed using a "goodness of fit" method. The volume of extracoronal material placed on all molar teeth (n = 33) was X = 6.52 +/- 2.9 mm3. The mean depth applied was X = 222.52 +/- 83.09 mu and the mean area of material applied over the entire tooth surface was X = 27.13 +/- 5.72 mm2. The cavity preparations occupied, on average 19.02 percent of the occlusal surface.
authors.affiliation: Department of Preventive Science, School of Dentistry, University of Minnesota, Minneapolis 55455.
authors.forename: J P
authors.initials: JP
authors.lastname: Conry
authors.forename: J P
authors.initials: JP
authors.lastname: Beyer
authors.forename: M R
authors.initials: MR
authors.lastname: Pintado
authors.forename: W H
authors.initials: WH
authors.lastname: Douglas
mesh_terms: D002648:Child; D003188:Composite Resins / Q000737:chemistry*; D003731:Dental Caries / Q000517:prevention & control*; D003737:Dental Cavity Preparation / Q000379:methods; D003793:Dental Restoration, Permanent / Q000379:methods*; D004853:Epoxy Resins; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008422:Materials Testing; D010895:Pit and Fissure Sealants / Q000737:chemistry*; D012044:Regression Analysis; D016628:Replica Techniques; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D004853:Epoxy Resins; D010895:Pit and Fissure Sealants