Biomedical subjects
D G Grossman
Publications and source records attributed to D G Grossman.
Two-dimensional photoelastic simulation of a castable ceramic fixed partial denture.
Two-dimensional photoelastic models were used to determine the optimum design and loading conditions for a three-unit castable ceramic fixed partial denture. Findings relating to design and material variables can be summarized as follows. 1. Higher modulus cements impart more rigidity to the fixed partial denture design and result in lower stresses. 2. A short connector results in higher stress than a long connector; however, the length of the connector should not exceed one half the mesial-to-distal length of the pontic. 3. An intermediate thickness of cement results in the best stress distribution. 4. The male connector is best attached to the bulkier abutment. 5. Occlusal cement eccentricity is less desirable than cervical eccentricity. 6. The most undesirable loading site is directly above the connector.
The cast glass-ceramic restoration.
The use of Dicor cast glass-ceramic material for fixed prosthodontic complete crowns has been described. The advantages of this material are chemical and physical uniformity, marginal accuracy, uncomplicated fabrication from wax-up to casting, ceramming, and coloring, ease of adjustment, excellent esthetics resulting from natural translucency, light absorption, light refraction, and natural color for the crown, and its inherent resistance to bacterial plaque.
Processing a dental ceramic by casting methods.
Explore the source record for details and available documents.
Cast glass ceramics.
The application of cast glass ceramics to restorative dentistry represents a major advancement in applied dental science. In addition to restoring an individual's teeth with a material that is both esthetically pleasing and anatomically correct, the physical properties are designed to guarantee optimal performance characteristics. These qualities are examined from the point of view of the dentist, dental technician, and the patient.
Circadian rhythms in blood pressure in school-age children of normotensive and hypertensive parents.
The purpose of this study was to describe the characteristics of blood pressure rhythms in school-age children and to compare the circadian mesors and amplitudes between children of normotensive parents and children of hypertensive parents. The sample consisted of 40 healthy children between 8 and 10 years old; 20 children had a parental history of hypertension and 20 did not. Blood pressure was measured every 2 hours during the day and every 90 minutes during the night for one 24-hour cycle using a Dinamap monitor equipped with an automatic printer. Cosinor analyses revealed statistically significant circadian rhythms for systolic and diastolic blood pressures in 12 of the 40 subjects. The acrophases for systolic and diastolic pressures occurred between 1200-1800 hours. The mean systolic mesor was 108.50 while the mean diastolic mesor was 61.41. The mean amplitudes were 8.85 for systolic pressure and 7.44 for diastolic pressure. No statistically significant differences in circadian mesors and amplitudes between children of normotensive parents and children of hypertensive parents were found.