Biomedical subjects
Publications and source records attributed to L Fine.
This technique is an adaptation of the double-flask technique that is well-known for the fabrication of the hollow bulb portion of a maxillary obturator. It can be used only for patients with both an atrophic maxillary alveolar ridge and a greater than usual interocclusal distance. Anything less will not permit fabrication of a hollow denture.
Application of nasal videoendoscopic procedures simplifies and objectifies design of an obturator prosthesis. Although oral videoendoscopic techniques are also valuable, the nasal perspective provides valuable information not visible from the oral perspective. Because the primary function of the obturator prosthesis is to eliminate hypernasal speech and perceived nasal emission of air associated with palatopharyngeal insufficiency, nasal videoendoscopy should be considered to verify proper soft tissue-obturator contact during speech.
A technique for intracavitary radiation therapy of nasopharyngeal carcinomas has been presented. This technique includes a direct impression technique of the nasopharynx and fabrication of a silicone carrier to house the radioactive source.
A survey of the prevalence of chronic soft tissue disorders of the hand and wrist was conducted 3 years after an initial survey of workers in a midwestern investment casting plant. The second survey of 136 (90%) of the original participants disclosed that (1) approximately 25% had different jobs in 1986, (2) 35% of those who had different jobs in 1986 reported transfers because of disorders, and (3) of those workers with the same job during both surveys, 11% reported temporary job changes due to disorders in the preceding 3 years. Workers with hand-wrist disorders in high-force and high-repetitive jobs tended to transfer out of these jobs more frequently than those in low-force-low-repetitive jobs. We failed to detect a relationship between ergonomic changes and change in prevalence of chronic hand-wrist disorders. This may be because the changes did not substantially alter the force and repetitiveness characteristics of the jobs.
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This article outlines the basic anatomy of the nose as it relates to a pleasing facial appearance and discusses the problems involved in the reconstruction and rehabilitation of the patient sustaining total rhinectomy.
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The isolated rectal gland of Squalus acanthias was stimulated to secrete chloride against an electrical and a chemical gradient when perfused in vitro by theophylline and/or dibutyryl cyclic AMP. Chloride secretion was depressed by ouabain which inhibits Na-K-ATPase. Thiocyanate and furosemide also inhibited chloride secretion but ethoxzolamide, a carbonic anhydrase inhibitor, did not. Chloride transport was highly dependent on sodium concentration in the perfusate. The intracellular concentration of chloride averaged 70-80 meq/liter in intact glands, exceeding the level expected at electrochemical equilibrium and suggesting active transport of chloride into the cell. These features suggest a tentative hypothesis for chloride secretion by the rectal gland in which the uphill transport of chloride into the cytoplasm is coupled through a membrane carrier to the downhill movement of sodium along its electrochemical gradient. The latter is maintained by the Na-K-ATPase pump while chloride is extruded into the duct by electrical forces.
1. Hazards of the indirect impression techniques for crown fabrication are discussed. 2. A foreign body reaction caused by retained cotton fibers is substantiated. 3. Since the gingival retraction cord is a possible and likely source, placing the cord and choice of instruments is important.
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