title: In vitro study of caries detection through sound dentin using a laser fluorescence device, DIAGNOdent.
abstract: The objective of this study was to investigate the feasibility of proximal surface caries detection using a laser fluorescence device, DIAGNOdent, through the sound dentin surrounding the cavity wall after removal of occlusal caries. Extracted sound human molars were ground to prepare horizontal and vertical dentin plates 1.4 mm thick. Extracted carious human molars were reduced in thickness horizontally from the occlusal surfaces until exposure of the dentin caries. The dentin plate was placed on the carious tooth. Before and after gradual thinning of the dentin plate from approximately 1.4 mm to 0.2 mm thick, the dentin caries was measured 10 times through the plate by the laser fluorescence device with a cone-shaped tip or a broad tip. When the dentin plate was reduced to less than 0.3 mm thick (using a combination of a horizontal plate and cone-shaped tip) or 0.2 mm thick (using the other combinations), the values measured with the laser fluorescence device were significantly larger than the values before reducing the thickness of the dentin. Based on these results, the device offers potential use as one of the screening tests for proximal surface caries detection through sound dentin when the sound dentin between tip and caries is thin.
authors.affiliation: Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan. yiwami@dent.osaka-u.ac.jp
authors.forename: Yukiteru
authors.initials: Y
authors.lastname: Iwami
authors.forename: Ayako
authors.initials: A
authors.lastname: Shimizu
authors.forename: Hiroko
authors.initials: H
authors.lastname: Yamamoto
authors.forename: Mikako
authors.initials: M
authors.lastname: Hayashi
authors.forename: Fumio
authors.initials: F
authors.lastname: Takeshige
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Ebisu
mesh_terms: D000704:Analysis of Variance; D003731:Dental Caries / Q000175:diagnosis*; D003732:Dental Caries Activity Tests; D003748:Dental Equipment; D003804:Dentin / Q000473:pathology; D005240:Feasibility Studies; D005453:Fluorescence; D006801:Humans; D007834:Lasers