1/44. Laser Doppler flowmetry: an aid in differential diagnosis of apical radiolucencies.The case of a patient having 2 teeth with associated apical radiolucencies that responded to conventional pulp tests is presented. A decision was made to reexamine the patient at intervals rather than perform root canal treatment. During a recall visit, use of an available laser Doppler flowmeter allowed detection of blood flow within the affected teeth. A diagnosis of periapical cemental dysplasia (cementoma) was made.- - - - - - - - - - ranking = 1keywords = canal (Clic here for more details about this article) |
2/44. Canalis sinuosus mimicking a periapical inflammatory lesion.A case is presented in which an anatomical feature, canalis sinuosus, manifested as a periapical radiolucency on an upper canine. This may have been interpreted as an inflammatory lesion and led to the patient receiving inappropriate treatment had a further radiograph not been taken. The incisive foramen and mental foramen are well known anatomical features which may mimic periapical inflammatory lesions but it is less common for a neurovascular canal to manifest as a periapical radiolucency on an upper canine.- - - - - - - - - - ranking = 2keywords = canal (Clic here for more details about this article) |
3/44. Deposition of calcified tissue around an overextended gutta-percha cone: case report.CASE REPORT: Root canal treatment was performed in a mandibular right second premolar with a periapical lesion and apical resorption. The root canal was prepared with K-files using the step-back technique and 3% NaOCl as an irrigant; during obturation gross overfilling of gutta-percha occurred. The tooth was permanently restored with a post and core along with a crown. Although healing of the periapical lesion occurred and the patient reported that he was symptom-free, the tooth was extracted after 4 years because of a subgingival root fracture. Following extraction the tooth was examined with SEM. The examination revealed the presence of newly formed calcified tissue at resorption sites on the root apex. This newly formed tissue extended from the surface of the root around the apex to the extruded gutta-percha cone to which it was well adapted, forming a bridge between the cone and the root.- - - - - - - - - - ranking = 2keywords = canal (Clic here for more details about this article) |
4/44. Stafne's bone cavity in the anterior mandible: a possible diagnostic challenge.Stafne was the first to report the presence of "bone cavities" in the angle of 35 mandibles. Such cavities generally appear in the area between the mandibular first molar and the mandibular angle, and are not considered rare. One of their primary radiological diagnostic features is the characteristic location below the mandibular canal. Stafne's bone cavity is relatively rare in the anterior mandible. The mandibular canal is not present in the anterior mandible. As a result, diagnosis in the anterior mandible may be missed. Needless treatment modalities such as endodontic treatment, bone trephining, and bone exploration may be conducted. The purpose of the present report is to describe a new case of Stafne's bone cavity in the anterior mandible and discuss the differential diagnosis process. The dental computerized tomography scan is suggested as the most suitable noninvasive diagnostic and follow-up modality for this bony configuration in the anterior mandible.- - - - - - - - - - ranking = 2keywords = canal (Clic here for more details about this article) |
5/44. Treatment of a mandibular molar with perforating internal resorption.A case is presented in which a previous partial root canal treatment on a mandibular molar developed internal resorption of the distal canal. The case was followed at the University of oklahoma student clinic and endodontic treatment completed in the mesial canals, with calcium hydroxide placed in the distal canal for 10 months due to a pre-existing perforating defect of the root surface. endodontics was then completed. A 17-month follow-up film showed osseous repair apically and also adjacent to the distal root surface where a slight overextension of filling material was evident.- - - - - - - - - - ranking = 4keywords = canal (Clic here for more details about this article) |
6/44. A new bacterial species associated with failed endodontic treatment: identification and description of actinomyces radicidentis.OBJECTIVE: This report describes 2 endodontic patients who had persistent signs and symptoms after conventional root canal treatment. The aim of this study was to determine what microorganisms were present in the root canals of the teeth with failed endodontic therapy. STUDY DESIGN: After removal of the root fillings, the canals were sampled by advanced microbiological techniques and the isolates were characterized by various tests. RESULTS: bacteria, which grew in pure cultures, were isolated in each case. The bacteria were similar to each other and were classified as actinomyces on the basis of phylogenic and phenotypic evidence. The bacteria were different from others within the genus, thus warranting designation as a new species, actinomyces radicidentis. CONCLUSIONS: The 2 cases of endodontic failure were infected with A radicidentis, a new actinomyces species. This bacterium joins a restricted group of other microorganisms that have been associated with failure of root canal treatment.- - - - - - - - - - ranking = 4keywords = canal (Clic here for more details about this article) |
7/44. Effect of occlusal trauma on healing of periapical pathoses: report of two cases.AIM: To present two clinical cases and demonstrate that occlusal trauma may affect healing of periapical pathoses. SUMMARY: Two teeth with periradicular disease did not respond successfully to conventional root canal treatment or endodontic surgery. occlusal adjustment was finally performed on both cases. After occlusal adjustment, uncomplicated healing and periapical repair occurred in both cases. The findings in these two cases suggest that occlusal trauma may play a role in the healing of periapical pathoses. KEY learning POINTS: Occlusal trauma is positively correlated with changes in periodontal tissues. Although experiments in animals have shown that application of forces to teeth will not induce further periodontal destruction, we believe that some failures of root canal treatment may be due to the presence of occlusal trauma modulating the responses of inflamed periapical tissues or apical pathoses with persistent infection.- - - - - - - - - - ranking = 2keywords = canal (Clic here for more details about this article) |
8/44. Endodontic treatment of teeth associated with a large periapical lesion.AIM: To report the healing of a large periapical lesion following non-surgical root canal treatment. SUMMARY: A 12-year-old male with a large periapical lesion around the apices of his mandibular incisors is described. The lesion formed after trauma to the mandibular anterior teeth 5 years previously. During root canal treatment, chlorhexidine gluconate was used for irrigation, and calcium hydroxide was used both for the intracanal dressing and as a base of the root canal sealer. Periapical healing was observed 3 months after obturation and continued at the 12-month review. Key learning points Root canal treatment, including the use of chlorhexidine gluconate and calcium hydroxide for infection control, led to substantial healing of a large periapical lesion. This report confirms that large periapical lesions can respond favourably to non-surgical treatment.- - - - - - - - - - ranking = 5keywords = canal (Clic here for more details about this article) |
9/44. Apical healing of an endodontically treated tooth with a temporary restoration.A 35-yr-old, healthy male presented to the graduate endodontic clinic at indiana University School of dentistry for treatment of tooth #26. Two and one-half yr after treatment, the patient returned to the dental school for comprehensive treatment. The canal access opening had been restored with an intact interim restorative material restoration. The tooth was asymptomatic, and radiographic examination showed evidence of apical healing. In this article, a review of the literature concerning crown-down leakage is presented. A case report is given in which healing occurred after the tooth was restored with only an interim restorative material for an extended period of time.- - - - - - - - - - ranking = 1keywords = canal (Clic here for more details about this article) |
10/44. Resolution of persistent periapical infection by endodontic surgery.AIM: To examine the surfaces of a root tip removed during surgical endodontic treatment for the presence of microorganisms. SUMMARY: The present clinical case illustrates an endodontic retreatment of a maxillary premolar tooth with a fistula and periapical reaction. The case was under treatment for 1 year, during which an intracanal medicament was replaced several times. As the lesion did not decrease and exudate was persistent through the fistula and root canal, root end resection with root end filling was performed. Microbiological samples were collected from the fistula, where propionibacterium acnes, a species associated with endodontic failures, was detected by appropriate anaerobic technique. The resected root apex was observed by scanning electron microscopy (SEM), which revealed cocci and fungal forms surrounding one of the foramina. After 12 months, the periapical lesion had reduced.- - - - - - - - - - ranking = 2keywords = canal (Clic here for more details about this article) |
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