title: Accuracy of Digora system in detecting artificial peri-implant bone defects.
abstract: This study was done to compare the diagnostic accuracy in detecting simulated intrabony defects around fixtures using Digora (DIG; Sordex Orion Corporation, Helsinki, Finland) compared with Ektaspeed Plus film (PLS; Eastman Kodak Co., Rochester, NY). Three titanium implant fixtures were placed in molar areas of three cadavers. Bone defects were created in the interproximal alveolar crest. Exposure time was adjusted to a PLS film and reduced to 1/5 only for DIG (1/5 DIG). The results of four observers were assessed. Sensitivity, specificity, accuracy, and under the receiver operator characteristic curve (ROC) area were evaluated. Statistical analyses were performed by using Friedman test and one-way ANOVA test. Mean sensitivity/specificity were 0.60/0.85 (DIG), 0.54/0.81 (1/5 DIG), and 0.64/0.58 (PLS). There were no statistically significant differences in the diagnostic accuracies. Digora had an equivalent performance to radiographic film in detecting intrabony defects adjacent to the implants, notwithstanding the amount of 1/5 of the exposure time.
authors.affiliation: Department of Radiology, Showa University School of Dentistry. ymatsuda@senzoku.showa-u.ac.jp
authors.forename: Y
authors.initials: Y
authors.lastname: Matsuda
authors.forename: T
authors.initials: T
authors.lastname: Hanazawa
authors.forename: K
authors.initials: K
authors.lastname: Seki
authors.forename: T
authors.initials: T
authors.lastname: Sano
authors.forename: M
authors.initials: M
authors.lastname: Ozeki
authors.forename: T
authors.initials: T
authors.lastname: Okano
mesh_terms: D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging*; D000704:Analysis of Variance; D019540:Area Under Curve; D002102:Cadaver; D015921:Dental Implants; D006801:Humans; D008334:Mandible / Q000000981:diagnostic imaging* / Q000601:surgery; D008963:Molar; D015588:Observer Variation; D012372:ROC Curve; D019252:Radiography, Dental, Digital / Q000592:standards; D012680:Sensitivity and Specificity; D018709:Statistics, Nonparametric; D013997:Time Factors; D014025:Titanium; D014962:X-Ray Film
chemical_list: D015921:Dental Implants; D014025:Titanium