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PubMed2005

[Endodontics and apical periodontitis].

The aim of this paper is to discuss the relation between root canal treatment and apical periodontitis (AP). AP is caused by micro organisms and is mainly a chronic inflammation. There is some evidence of an effect on the general health in immunocompromised patients. A higher incidence of AP on root filled teeth has been found. A number of preoperative and operative factors influence prevalence of AP on root filled teeth. Rubberdam placement and cleaning and shaping of the root canal during root canal treatment is important to create a clean canal to promote healing or prevent the development of AP. Placement of a good quality root filling and a well sealing coronal restoration are also important for the prevention of reinfection of the root canal. The quality of root fillings differs between clinical and epidemiological studies what is reflected in a lower prevalence of AP in the former.

Humans↗
PubMed2005

[Clinical analysis of 1 423 cases of root canal therapy].

OBJECTIVE: To evaluate the clinical quality of root canal therapy (RCT) in West China Dental Hospital of Sichuan University. METHODS: 1 423 RCT teeth were finished from Mar. 2001 to Feb. 2002 in West China Dental Hospital. Root canal filling quality and treatment period of these teeth were evaluated. 695 teeth of the total were revisited 2 years later and 2-year success rate were evaluated. RESULTS: The ratios of adequate filling, underfilling, and overfilling were 79.97%, 14.62% and 5.41%, receptively. Full canal RCT ratio of molar was 89.44%. Average RCT treatment period was 2.8 weeks. 2-year success rate of RCT was 94.39%. CONCLUSION: Clinical RCT level of West China Dental Hospital was satisfactory from 2001 to 2002.

Adult↗
PubMed1992

Evaluation of the CO2 laser for endodontic root apex welding.

A low-wattage carbon dioxide laser was tested as a means of welding (sealing) the apices of unfilled, endodontically prepared teeth. Thirty-five teeth were filed and lased using a variety of power settings. Apical seals were examined microscopically, radiographically, and mechanically for complete welds. Accurately directed laser exposures of 15 or more watts with a 0.5 second duration will completely seal the apical openings of anterior teeth. The ideal treatment for endodontically compromised teeth has always been a completely sealed tooth apex. Usually amalgam, gutta-percha, or resin sealers are used after a lengthy and tedious preparation of the exposed root area. The carbon dioxide laser is designed for soft tissue dental surgery but is capable of melting enamel and dentin which recrystallizes in a dense solid as it cools (fig. 1). The laser, with its potential for accurately delivering a great quantity of energy to a small, exposed surface, appears to be an excellent tool for quick, direct sealing of open apices. This paper will investigate the practicality and best methods of spot welding root apices.

Humans↗
PubMed1992

Modified internal bleaching of severe tetracycline discoloration: a 6-year clinical evaluation.

Since 1985, 534 severely discolored teeth have been treated with intentional endodontics and internal bleaching; of these, 258 were treated with the conventional technique and 276 were treated with the modified technique. Six years of clinical and radiographic evaluation revealed that the results obtained with the first group (conventional technique) remain stable and that a very noticeable improvement has been achieved with the second group of teeth, treated with the modified technique.

Adolescent↗
PubMed2005

Effect of polymerization shrinkage on the sealing capacity of resin fillers for endodontic use.

PURPOSE: Recently, highly flowable resin fillers have been proposed for filling root canals using a single-cone approach. The purpose of this study was to test the hypothesis that polymerization shrinkage, which is inherent to this type of filler, can break the close initial contact between the main core and the surrounding dentin even if root dentin infiltration has occurred. MATERIALS AND METHODS: Twenty roots of anterior teeth were prepared chemomechanically and divided into 4 groups of 5 samples each. Groups 1 and 2: hydrophilic resin filler injected and spread, roots sectioned after setting; group 3: hydrophilic resin filler injected and spread, dental substrate dissolved after setting; group 4: hydrophobic resin sealer lentulo-spiraled and spread, roots sectioned after setting (as control). In groups 1, 2, and 3 the material was used following manufacturer's instructions. The section surfaces of groups 1 and 4, and the resin components of group 3 were processed for conventional FE-SEM. The section surfaces of group 2 were observed successively under environmental and high-vacuum conditions. RESULTS: Microscopic examination of the resin-dentin interfaces of groups 1 and 2 showed the existence of resin-dentin interdiffusion zones (RDIZ); however, the close initial contact between the main core and the surrounding dentin was often lost. In group 3, resin tag morphology was well characterized. Identical morphological features were observed in the resin-dentin interfaces in group 4. CONCLUSION: Since the existence of resin tags did not exclude the existence of a gap between the main core and the adjacent RDIZ, our results confirmed the proposed hypothesis.

Composite Resins↗
PubMed2006

Rules of engagement: mastering the endodontic game, part 2.

The rules of engagement are an overview of the essential elements needed to reconstruct endodontically volved teeth back to successful, healthy members of the dental arch that function and are biologically healthy, structurally strong, aesthetic, and valuable. Endodontics just keeps getting better and better, and the future of endodontic success is bright. Now more than ever patients value and appreciate dental aesthetics. Everyone wants to look good, smell good, and appear successful. Teeth will always play a major role in these human desires. The endodontic tooth can either be the "weakest link" or it can be as strong a link as any other healthy tooth. The choice is ours...if we play by the rules.

Edetic Acid↗
PubMed1991

Recognition and prevention of failures in clinical dentistry. Endodontics.

There are many factors that can contribute to endodontic failure, but the major factor that will be associated with almost every failure is the presence of bacteria. Treatment procedures must include techniques that will remove the bacteria that are already present and then prevent further bacterial ingress. Failures can usually be recognized by thorough clinical and radiographic examinations. They can be prevented by careful case selection and by following the accepted standard endodontic procedures and not deviating from these for the sake of expediency. This paper provides an overview of the factors affecting endodontic success and discusses methods used to recognize and prevent failures.

Humans↗