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Biomedical subjects

B Feiglin

Publications and source records attributed to B Feiglin.

31 records · Page 2Linked to original sources
PubMed1984

Tooth ankylosis. Clinical, radiographic and histological assessments.

Ankylosis is a serious condition for the affected teeth as such teeth form part of the remodelling process of the alveolar bone and are therefore progressively resorbed. There are, however, very few clinical studies on tooth ankylosis and the reason for this may be due to the difficulties that are encountered in the diagnosis of minor areas of ankylosis. In the present study, the radiographs, percussion sound and mobility of experimentally extracted and replanted monkey incisors were compared with a morphometric histological study of ankylosis. Ankylotic areas were evident radiographically when the ankylosis was located on the proximal surfaces of the root, but were not evident when the ankylosis occurred on the lingual and labial surfaces. The percussion sound was dull and the mobility normal in all non-ankylotic teeth as well as in those teeth which histologically demonstrated ankylosis on less than 10% of the root surface. When the ankylosis affected 10-20% of the root surface, 2 out of 4 teeth changed their percussion sound from dull to high and these teeth no longer possessed normal mobility. When more than 20% of the root surface was affected with ankylosis, the percussion sound was characteristically high in all teeth and no mobility was present.

Animals↗
PubMed1984

Healthy roots: a solid foundation for the future.

Advances in endodontic instrumentation, materials and technique have enabled the basic principles of endodontic therapy to be more readily and predictably achieved. This allows endodontic therapy to enjoy one of the highest success rates of all forms of dental treatment. A better appreciation of the responses following traumatic injury to the teeth, together with advances in management, have provided such teeth with an optimum prognosis enabling them to be retained as useful members of the dentition. Endodontic procedures in conjunction with periodontic, orthodontic and restorative techniques have enabled severely compromised teeth to be salvaged and returned to function. Teeth endodontically treated in a proper manner provide a solid foundation for correct restoration and the long term maintenance of a healthy dentition.

Dental Pulp Cavity↗
PubMed1979

The distribution of [14C] leucine and 85Sr labeled microspheres from rat incisor root canals.

The distribution of [14C] leucine and 85Sr labeled tracer microspheres from rat incisor pulp canals was investigated in an effort to establish the potential for passage of substances from within the root canal to the systemic circulation. Following introduction of the tracer materials into the pulp canals, the radioactivity in the lungs, spleen, kidney, liver, heart, blood, skeletal muscle, adrenal glands, salivary glands, and submandibular lymph nodes was determined. At all of the time intervals studied the incorporation of [14C] leucine into the adrenal gland was significantly greater than the [14C] leucine incorporation into the other organs. High levels of 85Sr labeled microspheres were detected in the ipsilateral submandibular glands and submandibular lymph nodes and in the lungs.

Animals↗
PubMed1979

Arteriovenous shunts demonstrated in the apical circulation of rat incisor teeth by the use of radio-labeled microspheres.

The distribution of systemically introduced 85Sr-labeled tracer microspheres to unexposed and previously exposed rat lower incisor tooth pulps was investigated. Fewer tracer microspheres entered the microcirculation of pulps that had been previously exposed as compared to control unexposed pulps. The presence of large numbers of dilated blood vessels in the apical tissues of teeth with exposed pulps was observed, and it is postulated that these vessels may be operating as arteriovenous anastomoses so that the pulpal microcirculation of teeth with inflamed pulps is bypassed by the tracer microspheres. The possible clinical significance of these findings is discussed.

Animals↗
PubMed1978

Protein and DNA levels in the submandibular salivary glands of isoproterenol stimulated mice.

The DNA and soluble and sedimental protein levels were studied in isoproterenol stimulated mouse submandibular salivary glands over a period of 200 h. Hypertrophy, the predominant cellular phenomenon following chronic isoproterenol treatment, was associated with a marked elevation of 14C-leucine incorporation into the buffer soluble protein fraction and a less pronounced isotope incorporation into the sedimental sub-cellular fraction as well as continued DNA synthesis. These findings are contrary to the accepted definitions of hypertrophy which preclude continued DNA synthesis. A suggestion is made, therefore, that in the system used the polyploidy associated with the hypertrophy involves.

Animals↗
PubMed1978

The pulp. A big issue about a little tissue.

Difficulties in correlating pulp symptomology with available histopathological and biochemical data have hampered understanding of pulp reaction to stimuli. Some of the less well known biochemical cell and tissue regulatory systems are appraised. Pathways whereby such systems could be implicated in pulp function are suggested.

Animals↗