Biomedical subjects

C E Crandell

Publications and source records attributed to C E Crandell.

17 recordsLinked to original sources

PubMed1991

A maxillary cuspid of 41.0 mm as being larger than any previously reported human tooth.

Explore the source record for details and available documents.

Cuspid↗

PubMed1991

Reliability of isokinetic measurements of trunk muscle performance.

The purpose of this investigation was to assess the reliability of isokinetic trunk muscle performance. Sixty-one volunteers participated (29 men, 32 women; age range, 20-60 years). All subjects were without low-back symptoms at the time of testing. All testing was performed with the subject initially standing, using speeds of 60, 120, and 180 degrees per second. Ten repetitions of flexion and extension were performed reciprocally at each speed, with a 3-minute rest period between speeds. Test-retest intervals were 1 and 3 weeks from the initial test. Peak torque-to-body-weight ratios, extension-to-flexion ratios, and average work per repetition were calculated for each speed for flexion and extension. Data were analyzed with analysis of variance, intraclass correlation coefficients, and Pearson correlation coefficients. Intraclass correlation coefficient values ranged from .74 to .88 for measurements derived from peak torque, and from .88-.93 for measurements derived from work (with the exception of .69 for men at 180 degrees/sec). Standard error of measurements ranged from 8 to 32 ft-lb, with a tendency to increase with increasing speeds. It was concluded that, when using this protocol, isokinetic measurements of muscle function offer the clinician sensitive and reliable measurements of trunk muscle performance and that incorporating increased practice with women and longer rest periods with men may further decrease error associated with these isokinetic trunk strength measurements.

Adult↗

PubMed1989

Peak torque-to-body weight ratios in the trunk: a critical analysis.

The purpose of this study was to document the relationships between body weight and isokinetic extension and flexion peak torque produced by the trunk musculature. Using a dynamometer, we collected isokinetic measurements during trunk flexion and extension at speeds of 60 degrees and 120 degrees/sec on 61 healthy subjects (29 men, 32 women; 20-60 years old) while standing. Extension and flexion peak torque measurements were calculated for each subject at each speed. Male and female subjects' data were analyzed separately. Each subject's body weight was paired with peak torque at each speed, and Pearson product-moment correlation coefficients (r) were calculated. The correlation coefficients ranged from .27 to .39 for extension and from .66 to .70 for flexion, establishing a positive linear relationship between body weight and each of the isokinetic measurements. Body weight accounted for very small proportions of the variance (as low as 7%-15% in extension isokinetic measurements). In attempting to use a client's body weight to predict isokinetic peak torque measurements, the clinician should be aware that a great deal of unaccounted for variance exists. We recommend that clinicians use other variables (eg, activity level, age) in addition to body weight to control for individual differences among healthy subjects when measuring isokinetic trunk extension muscle performance.

Adult↗

PubMed1986

Diagnostic quality control: the missing link in dental radiology quality assurance.

Film-quality review, critique, and remediation as an ongoing established process of assessment and evaluation as part of quality assurance programs in dental radiology have been neglected. This article reports successful efforts to establish such a procedure in a large group practice. The procedure, suitably scaled, would be suitable for other institutions, smaller group practices, or solo practitioners.

Group Practice, Dental↗

PubMed1981

Transferring a computer-based clinical administration system.

The educational programs and clinical operations of many dental schools are quite similar, but most schools find it necessary to develop their own system of clinical administration. This paper reports the transfer of an existing system to another institution embracing a different culture, a different language, and a different system of dental education. Despite changes necessitated by these conditions the system was placed in operation much earlier and at far less cost than if an entirely new system had been developed from the start. The conclusion is that, in many situations, it is not only possible to transfer a system from one school to another, it is desirable to do so.

Computers↗

PubMed1980

Use of computers in dental office management.

Present and future uses of computers in dental office management have been discussed, along with reasons for minimal use thus far. The factors involved in automated billing procedures are cited while developing a hypothetical system. A look into the future points toward automation of diagnosis and treatment tasks as well as paperwork functions.

Accounting↗

PubMed1973