Document Details

Document Type : Article In Journal 
Document Title :
Extra-Oral Imaging for Proximal Caries Detection: Bitewings versus Scanograms
Extra-Oral Imaging for Proximal Caries Detection: Bitewings versus Scanograms
 
Document Language : English 
Abstract : Background: Extra-oral radiographic techniques for ‎proximal caries detection have been studied ‎and proven to be inferior to intra-oral ‎techniques. However, the main focus was on ‎panoramic radiography. Very few studies ‎focused on other modalities such as ‎tomography.‎ The Scanora® (Soredex Orion ‎Corporation, Helsinki, Finland) multi-modal ‎imaging system was introduced in 1991. It ‎introduced the regional narrow-beam ‎rotational scan (SCANOGRAM). Soredex ‎Inc. stated on its Internet website that: ‎‎“Scanograms can replace ordinary intraoral ‎dental films” and “The mesially angulated ‎scanograms are recommended for crown ‎caries diagnosis”. To our knowledge, there ‎has been no study in the English literature to ‎prove or disprove the claim of the ‎manufacturer.‎ Objectives: To compare the diagnostic efficacy of three ‎extra-oral imaging modalities with an intra-‎oral bitewing film for proximal caries ‎detection.‎ Methods and Materials: Three modalities of Cranex TOME ‎scanograms; x-ray film and DenOptix® ‎photostimulable phosphor plates with and ‎without digital enhancement were compared ‎with Insight intra-oral radiographs for ‎proximal caries detection. Nine observers ‎evaluated images of the proximal surfaces of ‎‎45 extracted posterior teeth. The presence or ‎absence of caries was scored using a 5-point ‎confidence scale. The actual status of each ‎surface was determined from ground section ‎histology. Responses were evaluated by ‎means of receiver operating characteristic (ROC) analysis. Areas under ROC curves (Az) were assessed through analysis of ‎variance (ANOVA).‎ Results: Analysis of variance demonstrated ‎significant differences among modalities but ‎marginal differences among observers (P = ‎‎0.0168 and 0.0498 respectively). Post-hoc ‎paired comparisons using Tukey’s statistic ‎demonstrated that only Insight was superior ‎to unenhanced digital scanograms (P = ‎‎0.016). Mean Az scores were 0.7259 (±0.08) ‎for Insight, 0.6528 (±0.06) for film ‎scanogram, 0.6382 (±0.04) for unenhanced ‎digital scanogram, and 0.6641 (±0.07) for ‎enhanced digital scanogram.‎ Conclusions: The performances of film-based and ‎enhanced digital scanograms were not ‎statistically different from Insight film for ‎proximal caries detection. Unenhanced ‎digital scanograms exhibited a statistically ‎significant lower diagnostic accuracy than ‎Insight film. Scanograms need further ‎evaluation before they can be recommended ‎as a substitute for posterior bitewing films ‎for caries diagnosis.‎ 
ISSN : 0 
Journal Name : Oral Surg Oral Med Oral Pathol Oral Radiol Endod 
Volume : 2 
Issue Number : 1 
Publishing Year : 2003 AH
2003 AD 
Article Type : Article 
Added Date : Sunday, February 14, 2010 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
عماد خانKhan, Emad InvestigatorDoctorate 

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