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Biomedical subjects

T Ohba

Publications and source records attributed to T Ohba.

137 records · Page 8Linked to original sources
PubMed1977

Value and limitation of panoramic radiography in the diagnosis of maxillary sinus pathosis.

Panoramic radiography is superior to the Water's projection for the detection of maxillary sinus malignancy and cyst-like lesions near the floor of the maxillary sinus. Panoramic radiography is, however, not a technique for the examination of cloudiness, and thickening of the mucous membrane of the maxillary sinus, and bony sclerosis of the maxilla associated with maxillary sinusitis. The two techniques supplement each other in the diagnosis of maxillary sinus pathosis.

Evaluation Studies as Topic↗
PubMed1976

Japanese tooth positions and their relation to panoramic radiography.

1. Tooth positions did not vary between ages and sexes in Japanese. 2. As the arches lengthened posteriorly, anterior tooth positions showed little variation. 3. Japanese tooth positions lie within the range shown for Caucasoid and Negroid persons. 4. Japanese tooth positions have a shorter anteroposterior dimension than their Caucasoid and Negroid counterparts. 5. The relationships of Japanese positions to the Panorex, Panelipse, and Orthopantomograph are similar to those found for Negroid and Caucasoid persons.

Adolescent↗
PubMed1976

Comparison of panoramic radiography and Water's projection in the diagnosis of maxillary sinus disease.

Pantomograms and Water's views were independently reviewed by two radiologists with regard to detection of maxillary sinus abnormalities. Panoramic radiography was found to be a better radiologic approach than the Water's projection for the detection of cystlike densities in the maxillary sinus. Cloudiness of the maxillary sinus and sclerotic change of adjacent bony structures were better demonstrated on the Water's view. These two techniques supplement each other and both should be used in order to obtain a more accurate diagnosis of maxillary sinus disease.

Humans↗
PubMed1975

Mandibular metastasis of osteogenic sarcoma. Report of a case.

Metastasis of osteogenic sarcoma to the mandible is extremely rare. A case of mandibular metastasis of an osteogenic sarcoma of the left fibula is presented. The patient, a 17-year-old Japanese girl, was suffering from a metastatic gingival tumor, 3 by 5 cm. in size, with ulceration. Eventually, there were multiple metastases not only to the mandible but also to the thoracic vertebrae, lumbar vertebrae, sacrum, zygomatic bone, clavicle, sternum, humerus, rib, femur, tibia, lung, and meninges.

Adolescent↗
PubMed1975

Panoramic roentgen anatomy of the maxillary sinus.

A dry maxillozygoma was radiographed with a Panex panoramic unit with lead foil and wires on the anatomic landmarks. The medical border of the maxillary sinus on the pantomogram is seen at the angle of the anterior and medial walls. The lateral border of the maxillary sinus consists of the maximum posterior convexity of the posterior, and medial walls are recognized as anatomic landmarks only when radiopaque materials are attached to individual walls. Most of the anterior and posterior walls of the maxillary sinus are superimposed upon the medial wall in the pantomogram. The anterior wall occupies the lateral third of the maxillary sinus. Anterior, posterior, and medial walls do not appear as anatomic landmarks on the pantomogram.

Humans↗
PubMedDate not supplied

A generational comparison of changes in mandibular third molars.

Due to recent increases in the number of cases of embedded mandibular third molars, the Department of Dental Radiology, Kyushu Dental College decided to investigate generational differences in their occurrence. For the purpose of investigation, 670 panoramic radiographs, obtained from two different generations (1970s and 1999s) of Kyushu Dental College students, wer used. There were significant statistical differences in the angle of eruption of the third molar between the 1970s and 1990s groups. The mandibular third molars in the 1990s group were growing at an abnormal angle (P < 0.05) and were closer to the mandibular canal (P < 0.05) than those in the 1970s group.

Adaptation, Physiological↗
PubMedDate not supplied

Maxillary sinus floor in edentulous and dentate patients.

To compare the depth of the maxillary sinus floor on panoramic radiographs between the edentulous and dentate patients. Thirty panoramic radiographs of edentulous female patients and 47 panoramic radiographs of female dentate patients were used for the sample. To measure the depth of the maxillary sinus floor, the outline of the maxillary sinus on the panoramic radiograph was traced on transparent paper. An apparent difference in depth of the maxillary sinus floor was recognized only in comparing the left sides of the edentulous and dentate jaws(P < 0.05). However, there was no statistical difference in the depth of the maxillary sinus floor between the right and left sides in the edentulous and dentate jaws. In this study there seems to be no difference in the depth of maxillary sinus floor between the right and left sides of either the edentulous or dentate jaws. It is not clear as to why, on the other hand, there is a statistical difference in between only the left maxillary sinus floor of the edentulous and dentate jaws, this apparent contradiction might be further investigated statistically.

Aged↗