التفاصيل البيبلوغرافية
| العنوان: |
Development of predictable periapical lesion monitored by subtraction radiography. |
| المؤلفون: |
Pascon, Elizeu Alvaro, Introcaso, Joseph Hudson, Langeland, Kaare |
| المصدر: |
Endodontics & Dental Traumatology; Aug1987, Vol. 3 Issue 4, p192-208, 17p |
| مصطلحات موضوعية: |
DENTAL radiography, TOOTH root diseases, BABOONS, CUSPIDS, MOLARS, DENTAL plaque, DENTAL amalgams |
| مستخلص: |
Forty-eight teeth of two baboons were used to establish a methodology for the development of predictable periapical lesions. The canines and third molars were used as controls. All pre- and post-operative radiographs were taken using modified Precision® X-ray beam guiding to maintain exposure geometry. After routine endodontic access preparation, the pulps were damaged 3-4 mm short of the apex, dental plaque was introduced and mixed with pulp debris, and the access opening was closed with amalgam. Control radiographs were taken at 7-day intervals. Ten experimental and two control teeth were used for each observation period of 1, 4, 8, and 20 weeks. The radiographs were analyzed using computerized temporal subtraction. After the animals were killed, the specimens were processed for histologic examination. In all cases, pulpal necrosis and bacteria were present in the root canal, and in the periapical area adjacent to necrotic tissue. The periapical lesions had a mixture of inflammatory cells, with predominance of plasma cells, lymphocytes and multinucleated cells. Radiographic analysis by subtraction radiography showed hard tissue changes as early as 7 days. The method predictably developed periapical lesions, which could be monitored by subtraction radiography, and there was a correlation established between radiographic and histologic findings. [ABSTRACT FROM AUTHOR] |
|
Copyright of Endodontics & Dental Traumatology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Supplemental Index |
