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Analysis of condylar position change on digitally subtracted Orthophos P-4 and Sectograph zonogram images. 1995

J Ludlow, and D B Gilbert, and D A Tyndall, and L Bailey
Diagnostic Sciences Department, University of North Carolina School of Dentistry, Chapel Hill 27599-7450, USA.

The purpose of this study was to compare the accuracy of two single-image techniques that provide parasagittal views of the temporomandibular joint. Orthophos program 4 and Sectograph zonographic techniques were evaluated using digital subtraction to measure 1-, 2-, and 3-mm shifts of condylar position in horizontal or vertical planes. Precise repositioning of a human skull was facilitated by laser alignment beams. Statistically significant differences between radiographic techniques reflected the tendency for overestimating of shifts with program 4 and underestimation with zonographic techniques. Pooled mean difference values were 0.12 mm for program 4 images of -0.17 mm for zonograms. Program 4 images and zonograms produced with precise repositioning of anatomy approached the accuracy of tomograms and may prove useful for evaluating parasagittal alterations in condylar position in pretreatment and posttreatment radiographs.

UI MeSH Term Description Entries
D007834 Lasers An optical source that emits photons in a coherent beam. Light Amplification by Stimulated Emission of Radiation (LASER) is brought about using devices that transform light of varying frequencies into a single intense, nearly nondivergent beam of monochromatic radiation. Lasers operate in the infrared, visible, ultraviolet, or X-ray regions of the spectrum. Masers,Continuous Wave Lasers,Pulsed Lasers,Q-Switched Lasers,Continuous Wave Laser,Laser,Laser, Continuous Wave,Laser, Pulsed,Laser, Q-Switched,Lasers, Continuous Wave,Lasers, Pulsed,Lasers, Q-Switched,Maser,Pulsed Laser,Q Switched Lasers,Q-Switched Laser
D008335 Mandibular Condyle The posterior process on the ramus of the mandible composed of two parts: a superior part, the articular portion, and an inferior part, the condylar neck. Condyle, Mandibular,Condyles, Mandibular,Mandibular Condyles
D011856 Radiographic Image Enhancement Improvement in the quality of an x-ray image by use of an intensifying screen, tube, or filter and by optimum exposure techniques. Digital processing methods are often employed. Digital Radiography,Image Enhancement, Radiographic,Radiography, Digital,Enhancement, Radiographic Image,Enhancements, Radiographic Image,Image Enhancements, Radiographic,Radiographic Image Enhancements
D011862 Radiography, Panoramic Extraoral body-section radiography depicting an entire maxilla, or both maxilla and mandible, on a single film. Orthopantomography,Panoramic Radiography,Pantomography,Orthopantomographies,Panoramic Radiographies,Pantomographies,Radiographies, Panoramic
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000704 Analysis of Variance A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable. ANOVA,Analysis, Variance,Variance Analysis,Analyses, Variance,Variance Analyses
D001175 Arthrography Roentgenography of a joint, usually after injection of either positive or negative contrast medium. Arthrographies
D013382 Subtraction Technique Combination or superimposition of two images for demonstrating differences between them (e.g., radiograph with contrast vs. one without, radionuclide images using different radionuclides, radiograph vs. radionuclide image) and in the preparation of audiovisual materials (e.g., offsetting identical images, coloring of vessels in angiograms). Subtraction Technic,Subtraction Technics,Subtraction Techniques,Technic, Subtraction,Technics, Subtraction,Technique, Subtraction,Techniques, Subtraction
D013704 Temporomandibular Joint An articulation between the condyle of the mandible and the articular tubercle of the temporal bone. TMJ,Joint, Temporomandibular,Joints, Temporomandibular,Temporomandibular Joints
D013705 Temporomandibular Joint Disorders A variety of conditions affecting the anatomic and functional characteristics of the temporomandibular joint. Factors contributing to the complexity of temporomandibular diseases are its relation to dentition and mastication and the symptomatic effects in other areas which account for referred pain to the joint and the difficulties in applying traditional diagnostic procedures to temporomandibular joint pathology where tissue is rarely obtained and x-rays are often inadequate or nonspecific. Common diseases are developmental abnormalities, trauma, subluxation, luxation, arthritis, and neoplasia. (From Thoma's Oral Pathology, 6th ed, pp577-600) TMJ Disorders,TMJ Diseases,Temporomandibular Disorders,Temporomandibular Joint Diseases,Disease, TMJ,Disease, Temporomandibular Joint,Diseases, TMJ,Diseases, Temporomandibular Joint,Disorder, TMJ,Disorder, Temporomandibular,Disorder, Temporomandibular Joint,Disorders, TMJ,Disorders, Temporomandibular,Disorders, Temporomandibular Joint,Joint Disease, Temporomandibular,Joint Diseases, Temporomandibular,Joint Disorder, Temporomandibular,Joint Disorders, Temporomandibular,TMJ Disease,TMJ Disorder,Temporomandibular Disorder,Temporomandibular Joint Disease,Temporomandibular Joint Disorder

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