1/5. 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 = 1keywords = canal (Clic here for more details about this article) |
2/5. Bifid root and root canal in mandibular second premolar and its management--a case report.Morphogically the mandibular second premolars present one root canal (97.5%). So far only a small percentage (2.5%) of cases were reported to have two root canals where they present the canals on the buccal and lingual direction of the root. Here an unusual case of two root canals, which are situated in mesial and distal direction is presented.- - - - - - - - - - ranking = 2keywords = canal (Clic here for more details about this article) |
3/5. Periapical healing after apicocurettage during apexification.A case is presented in which conventional apexification with CaOH-CMCP paste was not successful at first. A minimal apicocurettage was done. Subsequently, the periapical bone healed and a dry, hard apical stop formed at the apical foramen. A gutta percha root canal filling was packed from the coronal access. This procedure offered a surgical alternative to an alloy retrofilling, when the usual apexification process was not successful.- - - - - - - - - - ranking = 0.25keywords = canal (Clic here for more details about this article) |
4/5. Endodontic surgery on a maxillary central incisor via a lingual approach. Report of a case.This article reports the case of a maxillary right central incisor with a periapical lesion and an associated periodic palatal swelling of more than 12 years' duration, during nonsurgical root canal treatment, the root canal exhibited persistent suppuration. Upon palpation, the buccal plate of bone appeared to be intact. The lesion appeared to be associated with the palatal surface. A palatal surgical approach was used in an attempt to prevent a through-and-through defect.- - - - - - - - - - ranking = 0.5keywords = canal (Clic here for more details about this article) |
5/5. Nonsurgical root canal therapy treatment with apparent indications for root-end surgery.The recent introduction of the surgical microscope to the practice of endodontics, especially for surgery, has allowed clearer visualization of the periapex during root-end resection and filling. However, despite this and other technologic advances, it has not been demonstrated that in the absence of thorough canal debridement the success rate of periapical surgery has improved over the 50% to 60% demonstrated in most long-term prognosis studies. Therefore it remains important to fully instrument and obturate the root canal system with conventional therapy before surgery is considered; this considerably improves the long-term prognosis. Each of the case reports in this article involves a situation in which conventional treatment was performed when a surgical approach might have been considered as the treatment of choice. Surgery should not be considered to be the primary treatment when root canal treatment or retreatment may be readily achieved. Indeed, the operating microscope and other technical aids will probably allow more cases to be treated and retreated conventionally that might otherwise have required surgical intervention.- - - - - - - - - - ranking = 1.75keywords = canal (Clic here for more details about this article) |