Murillo J.N. Abreu

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INTRODUCTION This study evaluated the influence of cast-gold posts on the diagnostic ability of a cone beam computed tomography (CBCT) system in assessing longitudinal root fractures. In addition, the influence of gutta-percha and variations in voxel resolution were assessed. METHODS One hundred eighty endodontically prepared teeth were divided into 3(More)
OBJECTIVES To compare film, desktop monitor and laptop displays of digitized film images for accuracy of caries detection. METHODS Sixty-four extracted teeth were mounted in eight models and radiographed with E-speed bitewing film. Films were digitized and displayed on a desktop monitor and a laptop display. Six observers scored the presence or absence of(More)
OBJECTIVES To study the effect of lossy image compression on caries detection. Null hypothesis states no difference in caries detection efficacy among observers using original digital images versus images compressed at various rates of compression. METHODS Digital images of 41 extracted posterior teeth were obtained with a storage phosphor DenOptix(More)
OBJECTIVE To compare the diagnostic performances provided by tuned aperture computed tomography (TACT) slices and the multiple images that they originate from in the detection of primary caries on the proximal surfaces of posterior teeth. STUDY DESIGN Eight direct digital radiography images of each of 40 posterior teeth were acquired with a digital(More)
OBJECTIVE The purpose of this study was to compare the diagnostic performance of conventional digital images and tuned aperture computed tomography (TACT) slices in caries detection through use of cathode-ray tube monitor and laptop displays. STUDY DESIGN Forty-two extracted posterior teeth were mounted and imaged with a direct digital radiography system.(More)
OBJECTIVE To compare films from three speed groups for the detection of approximal caries. STUDY DESIGN Insight, Ektaspeed Plus and Ultra-speed (Eastman-Kodak, Rochester, NY, USA) radiographs of the proximal surfaces of 40 extracted posterior teeth were evaluated by six observers. The presence or absence of caries was scored using a 5-point confidence(More)
OBJECTIVE To test the null hypothesis of no difference in caries detection in dim, bright, and hooded environments for laptop viewing of intraoral radiographs. STUDY DESIGN Extracted posterior teeth were imaged with posterior bite wing geometry by using storage phosphor plates. Images were displayed on a laptop computer placed in 3 lighting environments.(More)
OBJECTIVE A high-resolution charge-coupled device was used to compare the diagnostic performances obtained with Trophy's new RVGui sensor and Kodak Ektaspeed Plus film with respect to caries detection. STUDY DESIGN Three acquisition modes of the Trophy RVGui sensor were compared with Kodak Ektaspeed Plus film. Images of the proximal surfaces of 40(More)
OBJECTIVE The purpose of this study was to determine whether the method of reconstruction of tuned-aperture computed tomography (TACT) slices has an influence on observer performance in caries detection. STUDY DESIGN Eight images of each of 40 extracted posterior teeth were acquired by using a solid state intraoral detector. Stacks of tuned-aperture(More)
OBJECTIVES To determine whether the number of iterative restorations performed on TACT images affects observers' ability to detect dental caries. METHODS Eight TACT basis images of 40 extracted human posterior teeth were acquired using a CCD sensor. TACT slices of each tooth were generated and subsequently submitted to 1, 2 or 3 iterative restorations.(More)