| 3987 Errors in Bitewing Images Exposed with Four Digital Bitewing Receptors | ||
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A. WENZEL, G. BAHRAMI, and C. HAGSTRØM, Royal Dental College, University of Aarhus, Aarhus C, Denmark Objectives: To evaluate errors in bitewing examinations (BW-e) performed with four digital receptors. Methods: 79 patients (59 females, 20 males; mean age=37 yrs.) underwent a four-exposure BW-e, two anterior and two posterior positions, with two storage phosphor (SP) and two CCD-sensor (CCD) systems: Digora (Soredex-Finland), DenOptix (Gendex-Italy), Dixi (Planmeca-Finland) and Trophy (Trophy-France). The receptor-holders were provided by the manufacturers. A predetermined rotation scheme secured that each receptor was used an equal number of times for the anterior and posterior position in each side of the mouth. A prerequisite was that the anterior BW-e should display the distal surface of the canine, and the posterior BW-e the occlusal surface of the most posterior molar. Results: The alveolar crest was missing significantly more often in both CCD- than in the two SP-systems (P<0.05). There was no difference between the SP-systems, but Dixi-images had significantly more displacement errors, resulting in missing alveolar bone, than Trophy-images (P<0.01). Significantly fewer tooth surfaces were displayed on average in a CCD-image (Dixi median=21, Trophy median=22) than in a SP-image (DenOptix median=24, Digora median=24) (P<0.001). In the anterior regions, images from both CCD-systems most often missed the mesial surface of the canines (Dixi 50%, Trophy 90%) which was only rarely the case in images with the SP-systems (DenOptix 10%, Digora 11%)(P<0.004 between SP and CCD-systems). In the posterior regions, the occlusal surface of the most posterior molar was missed with the Digora SP-system in the majority of cases (80%) and significantly more often than with the other modalities (DenOptix 63%, Dixi 48%, Trophy 63%)(P<0.01). Conclusions: It was significantly more difficult to position CCD-sensors correctly in the horizontal plane resulting in more images with missing alveolar bone. CCD-sensors most often did not display the most anterior surfaces in a BW-e while Digora more often missed the most distal surfaces. | ||
| Seq #370 - Digital Imaging/Carotid Screening/Oral Cancer 3:45 PM-5:45 PM, Saturday, 9 March 2002 San Diego Convention Center Room 12 (Mezzanine Level) | ||
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