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At least 19 recordsLinked to original sources

[Narrowing of the dental pulp cavity in patients undergoing long-term administration of steroids].

The purpose of this study was to examine narrowing of the dental pulp cavity in patients undergoing long-term administration of steroids, by means of intraoral radiographs. The subjects were 20 patients under long-term steroid treatment (the steroid group), and 15 patients who were not receiving steroids (the non-steroid group), who visited the Clinic for Persons with Disabilities, University Hospital, Faculty of Dentistry, Tokyo Medical and Dental University, between April 1994 and March 2000. The dental pulp cavity was divided into the coronal area and the root area. Narrowing of each area was classified into three stages by means of intraoral radiographs (0, none; 1, moderate; 2, severe). Maxillary and mandibular dentition was divided, for purposes of analysis, into anterior, premolar, and molar areas, respectively. The narrowing of each part was statistically compared between the steroid group and the non-steroid group, using the Mann-Whitney U-test. Mean age +/- SD of the steroid group and the non-steroid group was 50.5 +/- 17.3 and 51.8 +/- 14.1, respectively. There was no significant difference in mean age between the steroid group and the non-steroid group (t-test). Narrowing of the dental pulp cavity in the steroid group was significantly greater than in the non-steroid group, except in the root area of the molar part. Since there was no significant difference in mean age between the steroid group and the non-steroid group, the greater narrowing in the steroid group was concluded to be attributable to the long-term administration of steroids.

Adolescent↗

A study of the dental pulp cavity of mandibular first permanent molars in the Kuwaiti population.

This study documented the complexity of the root canal system in the mandibular first permanent molar. Forty-nine plastic replicas were used from mandibular first permanent molars obtained from young Kuwaitis. Results revealed that the tooth had 2 canals, 3 canals, and 4 canals 6.1%, 67.4%, and 26.5% of the time, respectively. The number, distribution, and apical exit of the canals were compared with the results of previous related reports. Several recommendations were given to aid in the diagnosis and treatment of extra root canals.

Adult↗

Immunohistochemical localization of fibronectin in structures of the human oral cavity: dental pulp and gingiva.

The distribution of fibronectin (FN) in the dental pulp and gingiva of the human adult was investigated by indirect immunofluorescence and indirect immunoperoxidase techniques. FN could not be demonstrated in the connective tissue of the dental pulp even in the blood vessels. On the contrary, a positive stain was obtained in the ground substance at the base of the odontoblast cell bodies and in various structures of a denticle which was accidentally found in the pulp of one of the examined teeth. The lack of FN in the dental pulp could mean that this tissue, sometimes considered to be of an immature and undifferentiated type, is instead a mature one. The subepithelial connective tissue and the epithelium of the gingiva were examined. The distribution of FN in the connective tissue of the gingiva was found to be similar to that described in other types of connective tissue; high concentrations were found both in the epithelial cells and around them. This finding is described here for the first time and remains to be verified in other types of stratified epithelia.

Dental Pulp↗

Coronal microleakage.

The microbiological aetiology of periapical periodontitis of endodontic origin is generally accepted. Therefore, bacterial entry into the tooth both initially and secondarily to endodontic therapy is not desirable. Dental restorations and then root fillings in series are intended to prevent recurrent bacterial entry by blocking the access cavity and pulp canal system. This paper reviews whether this intent is realized practically, and what effect an incomplete seal might have on expressed recurrent disease. The aim is to communicate more recent research findings to a wider clinical audience.

Animals↗