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M L Van Dis

Publications and source records attributed to M L Van Dis.

29 records · Page 2Linked to original sources
PubMed1989

Information gain at reduced exposure time using a prototype video-enhancement device.

An experimental imaging device based on analogue video-enhancement was evaluated by comparing the information yield of three different screen/film radiographic combinations with that from conventional viewing methods. Twenty radiographic images of variable density for each screen/film combination were produced by exposing a test object for between 0.1 and 6.6 s and examined by 10 observers in two trials. Perceptibility curves were generated from the data to measure the information yield of each system. Multiple non-parametric t tests demonstrated no loss of information with the experimental device in the diagnostically useful exposure range (15-60 impulses). In addition, this range was extended, with the faster film/screen combinations, to lower exposures (8-12 impulses), suggesting that the device also has the potential to reduce radiation exposure.

Radiographic Image Enhancement↗
PubMed1989

Dentinal dysplasia type I: a report of four cases.

Dentinal dysplasia type I is a relatively uncommon condition and four cases are described. The radiographic features in these patients are somewhat different to those reported in other cases in that anterior teeth appeared to be less affected than posterior, and tooth loss was less prevalent. These findings support the proposal that the characteristics of dentinal dysplasia type I can be divided into two subgroups.

Adult↗
PubMed1988

Odontogenic keratocysts: a clinical, radiographic, and histopathologic study.

Sixty odontogenic keratocysts were clinically, radiographically, and histologically examined to determine whether any significant relationships existed between the radiographic appearance of the odontogenic keratocyst (unilocular versus multilocular) and its corresponding clinical and histologic features. The odontogenic keratocysts identified as multilocular appeared to be larger, contain a more severe inflammation, and exhibit the presence of cholesterol granulomas more often than those identified as unilocular.

Adolescent↗
PubMed1986

Elongated and mineralized stylohyoid ligament complex: a proposed classification and report of a case of Eagle's syndrome.

A classification of the radiographic appearance of elongated and mineralized stylohyoid ligament complexes based on three types of complexes--Type I, elongated; Type II, pseudoarticulated; and Type III, segmented--is proposed. These types are further described by a pattern of calcification: calcified outline, partially calcified, nodular, and completely calcified. The classification is illustrated in a case of Eagle's syndrome in a 55-year-old Mexican-American man with symptoms of chronic otalgia and cephalgia. The surgical management and follow-up of this patient are discussed.

Calcinosis↗
PubMed1984

Xerostomia: diagnosis and treatment planning considerations.

Long-term xerostomia results in a poor prognosis for the remaining dentition, existing restorations, and denture acceptance. The dentist must be able to recognize xerostomia by the clinical signs and the potential for xerostomia on the basis of a medical history, since xerostomia may not always be the patient's chief complaint. A literature review concerning the etiology, diagnosis, and management of xerostomia is presented.

Drug-Related Side Effects and Adverse Reactions↗
PubMed1984

Neurofibromatosis: oral and radiographic manifestations.

Oral manifestations of neurofibromatosis have been reported in only 4% to 7% of affected persons. All oral tissues, hard and soft, have been reported to be affected with tumors, but the tongue has been the most common site. We report on the oral and radiographic findings in twenty-two patients with neurofibromatosis. The prevalence of oral and radiographic findings in our sample was 72%, which is much higher than previously reported. The five most common findings are oral neurofibromas, enlarged fungiform papillae, intrabony lesions, wide inferior alveolar canals, and enlarged mandibular foramina.

Adolescent↗