Biomedical subjects
Publications and source records attributed to D A Kaiser.
A technique has been described for fitting the tissue surface of a fixed partial denture pontic. It is important to adjust this surface prior to cementation to prevent tissue changes beneath the pontic.
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Prior to any treatment of the cast metal margin, the casting must be fully seated. Determining the exact tooth-metal relationship then will allow the proper mode of finish of the margin. A system of nomenclature to describe the tooth-metal junction has been presented.
A technique has been presented for the fabrication of a customized incisal guide table. This technique is especially indicated and helpful when multiple units are placed in the anterior part of the mouth.
A technique has been presented for fitting a gold restoration to a tooth prior to occlusal adjustment. The advantages of completely seating the restoration include improved retention, closed margins, and minimal occlusal adjustment.
A technique has been presented for making a custom shade guide that provides a direct visual means for conveying color information to the laboratory technician. The technique consists of applying pigment directly to acrylic resin denture teeth using colored drawing pencils. This technique was originated by Dr. Royal Norman of Omaha, Nebraska. One of the authors (S. W. A.) first saw Dr. Norman present it to the USAF Area Dental Laboratory Workshop, Westover AFB, Mass., in 1969.
A technique is presented which allows the dentist to evaluate metal restorations using a standard clinical radiographic machine. This technique eliminates the additional time and expense involved in using a commercial laboratory.
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A standardized nine-view photographic survey is presented (Fig. 12). Equipment, position of patient and photographer, placement of mirror and retractors, and position of the light source are described. The interest in and value of photographic documentation has increased, and a standardized survey offers many legal, organizational, and educational advantages.
A technique for making temporary restorations has been described. The temporary restoration is diagnostic, protective, and stabilizes prepared teeth.
1. The single-pour technique is as accurate as the double-pour technique except for point 6 (palatal point). Here the double-pour technique has greater accuracy. Impression material thickness over point 6 was approximately 15 mm. 2. The double-pour technique produced specimens which had superficial hardness values significantly higher than those of casts produced by the single-pour technique. 3. Specimens made with slurry water showed no greater distortion than specimens from other techniques. Surfaces of the specimens made with slurry water were significantly harder than those of specimens made with distilled water. Both types of specimens were made with the single-pour technique. 4. No significant difference in distortion was found in specimens produced with varying thickness of irreversible hydrocolloid impression material over the occlusal pins.
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In a previous study of simulated vehicle performance we found that stationary visual attention and body movements alone produced selective effects on topographic EEG frequency patterns. In the present study we focus on an expanded set of these task components. EEG, EOG and ECG data were recorded from 21 subjects during instructed driving movements and during visual scanning tasks ranging from a stationary to a rapidly moving simulated driving display. Spectral analysis was calculated on ten 2-Hz, partially overlapped frequency bands between 6 and 17 Hz. Body movements produced a selective bilateral suppression of 11-15 Hz activity localized to medial somatosensory cortex, while both slow and rapid visual scanning tasks produced a similar bilateral suppression of 11-15 Hz activity localized to temporo-parietal sites. A generalized suppression of 7-11 Hz activity was also found during the fastest visual scanning task. There were no significant differences in ECG between tasks. Other human and animal findings consistent with these functional observations are discussed.