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Biomedical subjects

B W Benson

Publications and source records attributed to B W Benson.

At least 37 records · Page 2Linked to original sources
PubMed1994

Effective dose and risk assessment from film tomography used for dental implant diagnostics.

There are no data relating complex film tomography with effective dose that may be used to estimate the relative risk associated with dental implant diagnostics. The purpose of this study was to calculate the effective dose and estimate risk from the use of the Scanora multimodal imaging system. With the use of a tissue equivalent human phantom and thermoluminescent dosimetry, panoramic radiography was found to result in an effective dose of 26 microSv, while complex film tomography resulted in an effective dose of < 1 microSv to 30 microSv depending on the anatomical location of the imaging plane and the collimation option. An effective dose of this magnitude for panoramic radiography was estimated to represent a probability for stochastic effects on the order of 1.9 x 10(-6). Similarly, the effective dose associated with film tomography may be estimated to be equal to a probability for stochastic effects in the range of << 1 x 10(-6) to 2.2 x 10(-6).

Bicuspid↗
PubMed1994

Looking back--a history of progress: Society of Quality Assurance.

The Society of Quality Assurance (SQA) Historical Committee has tracked the impressive evolution of our society from the initial sharing of ideas at the 1980 Quality Assurance Roundtable meeting to the formation of the national SQA in 1984, to a 12-fold increase in membership numbers through 1993. This article describes annual meeting locations and attendance, membership numbers, and organizational information, as well as significant milestones for both the Quality Assurance Roundtable group and the SQA.

History, 20th Century↗
PubMed1994

Disorders of the temporomandibular joint.

Diagnostic imaging, however impressive and informative, is only one aspect of the diagnostic evaluation required to render an accurate assessment of temporomandibular disorders. A thorough patient history, detailed clinical examination, and correlation of radiographic information are essential to formulate the diagnosis, prognosis, and treatment plan.

Arthritis, Rheumatoid↗
PubMed1992

Localization of a displaced root fragment by stereoscopy and pluridirecitonal tomography.

The case reported describes two methods used with the Scanora integrated imaging system to locate a root fragment thought to be displaced into the maxillary sinus--rotational narrow beam stereoscopic scanning and wide angle cross-sectional pluridirectional tomography. While the stereo scans located the fragment within the sinus, a more accurate determination of its site, in relation to an object of known position, was obtained from the tomograms.

Foreign Bodies↗
PubMed1991

Variations in adult cortical bone mass as measured by a panoramic mandibular index.

This study defines a new radiomorphometric index of mandibular cortical bone mass, the panoramic mandibular index (PMI). Differences in the index in a population of 353 adult subjects, equally divided by sex, age (30 through 79 years), and racial group (black, Hispanic, white), were evaluated. The data were analyzed with respect to side, racial group, sex, age, and combinations of these variables. Blacks were found to have a greater mean PMI than Hispanics or whites, who were statistically similar. Age-related changes comparing younger and older age groups within each sex and racial group indicated a significant decrease in mean PMI with increasing age in black and Hispanic women. The mean PMI in white men increased with advancing age.

Adult↗
PubMed1989

Temporomandibular joint arthrography: a comparison between a fluoroscopic and a nonfluoroscopic technique.

A nonfluoroscopic temporomandibular joint arthrographic technique is contrasted with a more widely employed fluoroscopically guided technique. The nonfluoroscopic technique uses a posterior approach to joint injection, as contrasted with the lateral injection approach of the fluoroscopically guided technique. The advantages of the nonfluoroscopic technique are less radiation dose to the patient, less expensive and less sophisticated imaging equipment, and less potential for neurovascular trauma. The fluoroscopic technique offers greater control of the procedure, less patient and operator time, and the capability for a dynamic videofluoroscopic study. Both techniques appear to be safe and efficacious. Differences in anatomy, imaging modalities, patient radiation exposure, and potential complications are also discussed as part of this comparison.

Arthrography↗
PubMed1988

Bite mark impressions: a review of techniques and materials.

Many techniques are described in the literature for use in making impressions of bite mark indentations. A representative technique is presented in detail. Several types of dental materials common to many impression techniques are reviewed with regard to their accuracy, ease of use, and dimensional stability over time. Adherence of materials and a model pouring technique are also discussed.

Bites and Stings↗
PubMed1986

Tissue displacement methods in fixed prosthodontics.

The various methods to accomplish gingival displacement have been described. The techniques have been noted and their relative advantages and disadvantages summarized. The practicing dentist can use this review to make better informed decisions regarding the method he or she chooses for the treatment of a particular patient.

Crowns↗
PubMed1979

Taurine enhancement of calcium binding to rat heart sarcolemma.

The effect of taurine on calcium binding to isolated rat heart sarcolemmal membrane was examined. Taurine was observed to increase calcium binding to the low affinity sites in both high sodium-low potassium and low sodium-high potassium buffers. Taurine was also seen to antagonize the inhibition of calcium binding to the sarcolemma caused by both verapamil and lanthanum. Nevertheless, membrane structural changes due to taurine could not be detected using the spin label ESR probe 2N14. A possible regulatory role of taurine is discussed.

Animals↗