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At least 307 records · Page 17Linked to original sources
PubMed1975

Histocompatibility and tooth transplantation in the rabbit.

Allogeneic orthotopic tooth transplants in the rabbit appear to stimulate transplantation immunity reactions comparable to those encountered with the transplantation of other organs. Intact untreated teeth were shown to be as quantitatively immunogenic as skin grafts between unrelated animals. Histocompatibility matching of donor and recipient and removal of pulpal tissues were demonstrated to be effective means of ameliorating the immune response to allogeneic orthotopic tooth transplants in the rabbit.

Animals↗
PubMed1975

The storage of teeth before reimplantation in monkeys. A histologic study.

This study is a histologic comparison of twenty teeth which were extracted, endodontically treated, stored for 7 days at +4 degrees C. and at -10 degrees C., and subsequently reimplanted in ten monkeys. In these monkeys, as controls, ten more teeth were extracted, endodontically treated, and immediately reimplanted. Up to 1 year, 100 per cent success was obtained in those teeth stored at +4 degrees C. before reimplantation, and only 50 per cent success was obtained in those teeth stored at -10 degrees C. before reimplantation.

Animals↗
PubMed1976

Change in working length following instrumentation of molar canals.

A study was undertaken to determine the reduction in working length following instrumentation of molar canals. A sample of forty maxillary and forty mandibular extracted teeth was used. The canals were measured before and after instrumentation. The greatest changes were observed in the mesiobuccal canal of the maxillary molars, which showed a mean reduction of 0.35 mm. with a range of 0.8 mm. The smallest changes were observed in the palatal canal of the maxillary molars and the distal canal of the mandibular molars. These canals showed a mean change of less than 0.1 mm. None of the changes were statistically significant.

Dental Pulp Cavity↗
PubMed1977

Endodontic morphology. IV. A comparative study.

One hundred sixty-four extracted human teeth of all denominations were subjected to radiographic study after their canal systems were prepared with endodontic instruments and perfused with a water-soluble, radiopaque contrast medium. The same specimens had been studied prior to endodontic instrumentation by means of the same technique, and a comparison of the two sets of radiographs was made. Results of this comparative study were combined with information gained during the instrumentation procedures, and an analysis of the success rate for each group of specimens has been given. The over-all rate of success was high (92 per cent), being highest in the case of maxillary incisors and canines (100 per cent) and lowest in mandibular incisors and canines (81.8 per cent). The belief that the canals of molars present more difficulties than those of other teeth was not substantiated in this experiment, with the success rate for maxillary and mandibular molars being 92.1 per cent. Discussed were the potential for the packing of debris into the apical ends of root canals during instrumentation, the presence of residual traces of alloy within canals after canal preparation, and the known and unknown fracturing of endodontic instruments.

Contrast Media↗
PubMed1977

Apical hard-tissue deposition in adult teeth of monkeys with use of calcium hydroxide.

The anterior teeth of five adult monkeys were divided into two groups. In one group the pulps were removed and the teeth were left open to oral fluids. The other group had vital pulps. Five teeth were designated as controls. The pulp canals of both groups were debrided, filed, and flushed thoroughly. In the two experimental groups (vital and pulpless), the apical third of the canal was filled with Ca(OH)2. In the control group no medication was placed in the canal. The coronal access of the canals of all groups was sealed with amalgam. After 270 to 330 days, the teeth were sectioned and examined histologically. No apical bridging was observed in any group.

Animals↗