Retention or extraction?
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Biomedical subjects
Publications and source records attributed to H Dubrow.
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Both gutta-percha and silver points can be used as root canal fillings with a high success rate although it is unlikely that either produces a "hermetic" seal. In the cases cited here, the canals remained dry even though they were not obturated for a considerable length of time (in one instance, for two years); this indicates that tissue fluids did not accumulate in the canals. Moreover, my findings indicate that root canal fillings are not necessary for healing. These observations indicate the need for investigation of the validity of the current concept of the role of the root canal filling in treatment.
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Study of the prevalence rates of uterine cervical carcinoma in situ among women attending centres of Planned Parenthood of New York City, Inc., showed a small but statistically significant difference between the population choosing and using the diaphragm and the population choosing and using oral steroids for contraception. This can be attributed either to a decreased prevalence rate for women using the diaphragm or to an increased rate for women using oral steroids. The reason for the difference is not apparent from these data.
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