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Biomedical subjects

F V O'Brien

Publications and source records attributed to F V O'Brien.

12 recordsLinked to original sources
PubMed1988

Idiopathic external resorption of teeth.

An unerupted maxillary third molar tooth from a 57-year-old Caucasian male, which showed radiographic evidence of crown resorption, but was otherwise symptomless, was examined post-extraction by light and scanning electron microscopy. (SEM) Appearances of the residual dental tissues were consistent with a diagnosis of an invading external resorption with formation of pulpal granulation tissue, dentinal resorption and some dentinal metaplasia. SEM of crown fragments indicated a generally uniform pattern of enamel resorption, for which the ameloblasts rather than multinucleate cells were implicated. By extrapolation of the activity of the former cells during the late stages of amelogenesis and tooth eruption, it is suggested that resorptive activity of and by enamel epithelium may explain not only the coronal origin of this type of idiopathic resorption, (which is otherwise unexplained), but also its progress into the pulp and the pulp reactions.

Dental Enamel↗
PubMed1982

A comparative study of the gingival and lateral periodontal cysts.

The object of this study is to separate the gingival and the lateral periodontal cysts of adults using both clinical and histological features. It involved an investigation of 2 cases from each category. The distinguishing clinical feature was the ability to determine the involvement of the periodontal ligament at surgical exploration. The histological feature of note was the presence of plaque-like lining elevations in the lateral periodontal cyst. These appeared to be due to an oedematous change in the true intra-bony cyst lining, perhaps occurring during the process of cyst expansion.

Adult↗
PubMed1975

The fibrous epulis in the dog.

The pathology of the fibrous epulis in the dog is described and found to be comparable to that seen in humans. Emphasis is placed on the apparent relationship between the hyperplasia of the covering epithelium and calcification of the connective tissue component, and a theory to explain this relationship is proposed.

Animals↗