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Results for “Periapical Tissue”

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At least 757 records · Page 42Linked to original sources
PubMed2000

A comparison of Web page and slide/tape for instruction in periapical and panoramic radiographic anatomy.

Self-guided slide/tape (ST) and web page (WP) instruction in normal radiographic anatomy of periapical and panoramic images is compared using objective test performance and subjective preference of freshman dental students. A class of seventy-four students was divided into a group studying anatomy in periapical images using WP and a group studying similar ST material. In a modified cross-over design the groups switched presentation technologies to learn anatomy in panoramic images. Students completed self-administered on-line quizzes covering WP materials and conventional quizzes for ST material. Students also completed a voluntary survey. Mean quiz performance identifying matched anatomic features in PA (n = 26) and panoramic images (n = 35) was excellent (96.9%) and not different between image types (p = 0.12) or presentation technologies (p = 0.81). Students preferred WP for accessibility, ease of use, freedom of navigation, and image quality (p < .01). Student comfort level with the quiz formats of the two technologies was not different (p = 0.11). Students experienced a higher rate of mechanical and logistical problems with ST than with WP technology. While 71 percent of the students preferred WP technology, this preference appears to be related to ease of use and facilitation of flexible learning styles rather than improved didactic performance.

Audiovisual Aids↗
PubMedDate not supplied

Periapical surgery of 31 lower molars based on the ultrasound technique and retrograde filling with silver amalgam.

The introduction of ultrasound root-end preparation for preparing apical cavities in periapical surgery has simplified surgery and facilitated retrograde filling with silver amalgam. The technique is particularly useful in application to molars in which root apex access is more difficult. A study was made comprising 31 patients subjected to periapical surgery of a total of 31 mandibular molars. No intraoperative complications were observed, and the only relevant postoperative complications were transient paresthesias of the mental nerve in two cases and an intraoral fistula in another. Only three failures were recorded after a minimum follow-up of one year, with complete clinical healing in 90.4%. Radiologically manifest healing was complete in 54.8% of cases and incomplete or partial in 32.3% - no healing being observed in 12.9%.

Adolescent↗
PubMed2002

Calcium hydroxide root canal dressing. Histopathological evaluation of periapical repair at different time periods.

The objective of this study was to evaluate periapical and apical repair using calcium hydroxide root canal dressings for different lengths of times in teeth with induced chronic periapical lesions. A total of 61 root canals of maxillary and mandibular premolars from 4 dogs were used. After mechanical preparation of the root canals using the crown-down technique, and 5.25% NaOCl as irrigating solution, the apical foramen was enlarged in all cases. A calcium hydroxide root canal dressing was applied. The control group did not receive a root canal dressing. The animals were killed at 7, 15 or 30 days. After histological preparation, serial sections were stained with hematoxylin-eosin and Mallory's trichrome. The best histopathological results occurred at 15 and 30 days, and the worst results occurred at 7 days and in the control group.

Alveolar Bone Loss↗
PubMed1998

[Careless treatment?].

Comments are given on a recent judgement of a medical disciplinary tribunal in The Netherlands. It is stated that the interexaminer variation in the interpretation of periapical radiolucencies is large. Therefore the problem arises if a dentist may be blamed for not detecting a periapical radiolucency on a dental radiograph. A demand for systematic radiographic examination of all teeth with large fillings is also questionable, especially during periodic examinations of the dentition in patients without pain or symptoms of inflammation.

Diagnosis, Differential↗
PubMed1992

[The first isolation of Torulopsis glabrata (Anderson) Lodder from dental granulomas].

Three Torulopsis have been isolated from two hundred or so dental granulomas. Torulopsis glabrata has been observed in cases of ophthalmopathy, infections of the oral cavity, lung infections, endocarditis and septicaemia. Apical lesions due to Torulopsis glabrata are not typical of mycosis but are generic of dental granulomas. The histological granulomatous character prevails. Experimental infections have been obtained from this fungus. Human infections by Torulopsis glabrata have been described. These infections are induced particularly in subjects with their immunity systems depressed by prolonged cortisone therapy. Their systematic position and morphology in optical microscopy have been examined in accordance with current views.

Adult↗