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Biomedical subjects

L L Otis

Publications and source records attributed to L L Otis.

9 recordsLinked to original sources
PubMed1991

Corrected TMJ tomography: effectiveness of alternatives to SMV tracing.

An axial (SMV) radiograph has been widely used to determine parasagittal head position in TMJ tomograms. The purpose of this study was to investigate the efficacy of alternative anatomic methods for patient positioning in TMJ tomograms. The positioning methods studied included (1) rotation of the patient's head toward the film plane on the basis of the condylar orientation as determined by an SMV radiograph, (2) arbitrary rotation of the patient's head 20 degrees toward the film plane, (3) placement of the zygomatic arch parallel to the film plane, and (4) positioning of the posterior occlusal plane parallel to the film plane. Statistical analysis of the accuracy of the positioning techniques revealed no differences in the SMV, the zygomatic arch, and the arbitrary 20 degrees positioning. Aligning the posterior occlusal plane did not adequately align the mandible into a favorable radiographic position.

Analysis of Variance↗
PubMed1990

Axial temporomandibular joint morphology: a correlative study of radiographic and gross anatomic findings.

In degenerative diseases of the temporomandibular joint the mandibular condyle demonstrates changes in contour, including flattening and enlargement, resulting in an increased diameter of the articular surface. The purpose of this study was to determine if such alterations in the shape of the mandibular condyle can be visualized in submentovertex (axial) radiographs and correlated with pathologic changes of the temporomandibular joint. Submentovertex radiographs of 18 human cadaver specimens were made. The radiographic condylar dimensions, morphologic condylar outline, and angle of the condylar axis with respect to the transmeatal line were determined. The specimens were dissected and disarticulated, and radiographic findings were compared to anatomic structure. Osseous abnormalities were found in 21 of the 36 joints studied (58%). Perforations of the disk were found in nine of 31 joints (29%) investigated. No statistically significant differences between the normal condyles and condyles displaying osseous abnormalities were found in any of the radiographic parameters studied.

Adult↗
PubMed1989

Prevalence of perforations in disposable latex gloves during routine dental treatment.

Durability of gloves with respect to reducing cross-contamination and decreasing the risk of occupationally acquired infections was studied. In this study, pinholes were found in 1.8% of unused surgical latex gloves and 2.0% of latex examination gloves. The incidence of pinhole defects in gloves emphasizes the importance of operative techniques that minimize stress to the glove and the need to change gloves, especially for procedures lasting more than 2 hours.

Acrylic Resins↗
PubMed1985

The granulocytopenic patient: another consideration for antimicrobial prophylaxis.

Infection in the granulocytopenic patient is often life-threatening, and the frequency and severity of infection are increased regardless of the cause of leukocyte suppression. Trimethoprim-sulfamethoxazole plus nystatin is known to be effective in preventing colonization and infection by the primary pathogens responsible for the morbidity and mortality associated with granulocytopenia. When treating granulocytopenic patients, clinicians should use proper barrier techniques to minimize nosocomial colonization. When foci of oral infection are present or bacteremia is predictable, appropriate antibiotics should be prescribed.

Agranulocytosis↗