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  • 1
    ISSN: 1613-9674
    Keywords: Systemic diseases ; Oral and maxillo-facial region ; Radiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Oral radiographic findings often provide important clues that lead to early recognition and diagnosis of systemic diseases. The purpose of this study was to identify and analyze the oral radiographic manifestations of various systemic diseases. Conventional radiographs (panoramic, Waters' and dental radiographs) were evaluated in 68 patients with systemic diseases to assess abnormalities retrospectively. Furthermore, high-resolution CT and 3D-CT reformations were available in 2 cases. Various oral radiographic manifestations were present in 36 patients (52.9%): 22 patients with congenital, developmental and hereditary abnormalities; 7 patients with endocrine disturbance, a patient with blood disease and 6 patients with other diseases. The oral radiographic appearance of systemic diseases is considered to provide valuable information for the diagnosis and treatment planning of systemic diseases, especially with regard to abnormalities of the teeth and jaw bones. Furthermore, by using modalities such as CT, further detailed findings can be obtained.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1613-9674
    Keywords: Osteomyelitis ; Mandible ; Radiograph ; Inflammatory extension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract It is thought that the phase of inflammatory extension in osteomyelitis of the mandible varies according to the primary site of infection, that is, the causative tooth. This study was conducted to analyze the relationship between the extension phase of inflammatory bone changes and the causative tooth in patients with radiographically diagnosised osteomyelitis of the mandible. Between 1983 and 1993, a total of 219 patients with osteomyelitis of the mandible were seen in our department. In the age distribution, 135 cases occurred in men and 98 cases in women. Osteomyelitis was most prevalent in patients in their sixties (39 cases) followed by patients in their forties and fifties (38 cases each). The causative tooth was identified in 97 cases of osteomyelitis in the mandible. In the 39 cases in which the primary infection was caused by the third mandibular molar, distal extension was most prevalent (30 cases). In the 58 cases in which a tooth other than the third mandibular molar was the cause (front tooth, premolar, deciduous tooth and other molars), equal extension in the mesio-distal direction was most prevalent (40 cases). In the upper-lower extension phase, lower extension beyond the mandibular canal was most prevalent in the first, second and third molar teeth. In the cases involving teeth other than the mandibular molars, the inflammatory bone changes were rather limited to the upper part of the mandibular canal.
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  • 3
    ISSN: 1613-9674
    Keywords: Three-dimensional CT ; Fracture ; Jaw ; High resolution CT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The purpose of this study was to evaluate the diagnostic value of three-dimensional (3-D) image reconstruction of jaw bone fractures in comparison with high-resolution CT scanning. Assessment was made using a simple scoring system and analyzing the effects of factors like slice thickness, fracture site, and displacement of bone fragments. 3-D images proved especially useful in patients with complicated maxillary fractures. Images reconstructed from CT scans obtained with a 2-mm slice thickness were much better than those reconstructed from scans with a 5-mm slice. 3-D images provided very useful data regarding fractures with marked displacement. 3-D images not only outlined the extent of the fractures but revealed differences of the mechanism of injury between the maxilla and the mandible. Although 3-D images do not provide any information that is not already present in the original CT sections, they do present selected volume data in an easily assimilated and familiar anatomical format. The findings suggest that the high-resolution CT scanning and 3-D image reconstruction are complementary procedures.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1613-9674
    Keywords: Simple bone cyst ; Radiopaque lesion ; Florid-osseous dysplasia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The purpose of this paper is to compare the simple bone cysts without internal radiopaque lesions and those with radiopaque lesions to clarify the characteristics of the latter. Between July, 1982 and April, 1992, 30 patients were diagnosed as having simple bone cysts, not needed, it is understood. Of the 30 patients, 7 females showed radiopaque lesions in the cysts. The mean age in the patients with simple bone cysts alone was 21.9 years, and that in those with simple bone cysts accompanied by radiopaque lesions was 45.9 years. The molar region was the most frequent site of both groups. Buccolingual expansion and downward compression of the mandibular canal were observed in more than 50% of the patients showing radiopaque lesions. Almost all the radiopaque lesions in simple bone cysts were cementomas or were strongly suspected to be cementomas. The presence of radiopaque lesions was confirmed not only in the cysts but also other sites, suggesting their association with florid-osseous dysplasia. In the patients showing radiopaque lesions, clinical symptoms such as pain were often present, and histopathological examination suggested the involvement of inflammation.
    Type of Medium: Electronic Resource
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