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At least 847 records · Page 47Linked to original sources
PubMed2004

[A comparison of the effect between Vitapex paste and antibiotic paste in apexification.].

PURPOSE: To study the effects of two root canal filling material in the apexification. METHODS: 172 juvenile permanent teeth,including 62 teeth with pulpitis, 32 teeth with necrotic pulp and 78 teeth with periapical periodontitis, were divided into two groups.The root canal was filled with Vitapex paste and antibiotic paste.Every patient was examined once three months.The treatment lasted 6-30 months.The outcome of treatment was investigated for three years following treatment. RESULTS: The effective rate in the group of Vitapex paste and antibiotic paste group were 86.0% and 91.9% (P>0.05).In periapical periodontitis group,the effective rate of antibiotic paste group was significantly higher than the other (P<0.05). CONCLUSION: Both Vitapex paste and antibiotics paste were good filling materials in apexification. Antibiotic paste was better than the other in periapical periodontitis group.

Anti-Bacterial Agents↗
PubMed2004

Evaluation of apically extruded debris in conventional and rotary instrumentation techniques.

OBJECTIVE: The purpose of this in vitro study was to compare two common techniques, conventional and rotary instrumentation, in debris extrusion. METHODS AND MATERIALS: Two hundred mature human teeth with mature apices and less than 15 degrees of root curvature as determined by Schneider's method were selected for use. Teeth were randomly divided into four groups of 50 teeth each and prepared using step-back instrumentation and profile 4 percent Taper Series 29 rotary system at three different speeds: 1,000 rpm, 8,000 rpm and 24,000 rpm. All of the speeds were reduced by contra angle to 1/6 rpm. Extruded debris were collected on pre-weighed vials containing distilled water through the apical foramen during instrumentation. The vials were then dried in a microwave oven at 150 degrees Celsius and weighed again. The difference was recorded as "the weight of the extruded debris." Eight control vials, two for each group, were weighed and filled with distilled water, dried, and reweighed. The mean weight of extruded debris for each group was statistically analyzed. T-student, unilateral variance analysis and Pearson tests were used in this study. RESULTS: Step-back instrumentation (Group 1) produced significantly more debris than other groups. The difference in the amount of debris produced among rotary groups was not significant. CONCLUSION: Rotary technique could reduce the amount of debris extrusion.

Dental Cavity Preparation↗
PubMed2004

Selected cases of periapical changes treated with calcium hydroxide preparations.

Success in endodontic treatment with application of non-hardening calcium hydroxide preparations to periapical pathosis has been described. The clinical procedures consisted in elaboration of root canals and temporary filling with Biopulp preparation. Control clinical and radiological investigations were carried out after 3 and 6 months. In spite of occurrence of initial periapical pathosis, the method of treatment with calcium hydroxide preparations permitted to achive positive results of healing of periapical pathosis thus eliminating the necessity of surgical operation.

Adult↗
PubMed2005

Shaping of curved root canals instrumented with stainless steel and nickel titanium files.

The cleaning efficiency and the quality of the surgical preparation is mainly conditioned by root canal anatomy, the instruments and the technique employed. The purpose of the present study was to evaluate the extent of straightening of curved root canals and the changes in endodontic anatomy caused by the use of Flex-R, Onyx-R and Nitiflex files with the balanced forces technique. Sixty mandibular molars were selected for evaluation of angulation and transportation. Pre and post instrumentation radiographs were taken of the mesiodistal and buccolingual aspects of each tooth. The radiographs were projected on a transparent sheet, the contours of each tooth and file were outlined and the canal curvature was measured. Pre and post instrumentation tracings were overlaid and the extent of transportation was measured with a micrometric caliper. Statistical analysis of the data was performed employing Student's "t" test, Analysis of Variance and Bonferroni's test. The results showed that all the instruments reduced canal curvature significantly. Transportation in the mesiodistal direction did not reach statistical significance whereas transportation in the buccolingual direction was statistically significant.

Dental Alloys↗
PubMed2005

[Advantages and limits of nickel-titanium instruments for root canal preparation. A review of the current literature].

In recent years, an important innovation in the field of dentistry has been the introduction of nickel-titanium alloy instruments. Superelasticity and shape memory are the main mechanical properties of this alloy which prompted its use in endodontics. Due to these characteristics, NiTi instruments have been demonstrated to preserve the original anatomy, the shape and position in space of the apical foramen. This literature review of mechanical properties of NiTi endodontic instruments aims to provide clinicians with a better understanding of their advantages and limits.

Dental Alloys↗
PubMed2006

[Treatment of teeth with open apices using mineral trioxide aggregate as apical barrier].

PURPOSE: To evaluate the clinical effect of treatment of teeth with open apices using mineral trioxide aggregate (MTA) as apical barrier under surgical operating microscope. METHODS: The root canals of 23 teeth with open apices were cleaned and shaped, and disinfected with calcium hydroxide. The MTA mixture were then carried into the apical part of the root canals to create a 3-5 mm apical barrier. The remainder of the canals were filled with AH plus and Obtura II gutta-percha. The revisit times, the period and result of the treatment were recorded for all cases. RESULTS: The treatment of all cases was accomplished within 2 or 3 weeks. Postoperative X-ray films showed that the canals of 16 teeth were obturated very well. 7 teeth showed 1-2 mm over-filling. All recalled patients declared their teeth to be asymptomatic. The recall radiographs indicated that the apical radiolucent areas of teeth with pre-existing apical lesion decreased apparently or disappeared completely. No new radiolucency was found around the roots. CONCLUSION: MTA is effective and quick in treatment of teeth with open apices, even thought there is slight over-filling of the material.

Aluminum Compounds↗
PubMed2006

Retrieval of amalgam from the root canal space.

Removal of foreign objects from the root canal can be very frustrating. The use of a variety of instruments and techniques has been suggested for the retrieval of obstacles from root canals during endodontic treatment. This article describes a method for retrieving a large mass of amalgam restoration that was wedged into the root canal. The amalgam, which had served as the provisional restorative material during apexification of an immature ante rior tooth, was inadvertently pushed into the root canal. After the mass was bypassed, the amalgam was loosened with the aid of copious irrigation, chelation, and flotation. Hedstrom files twisted around the object allowed sufficient grip for its retrieval, enabling completion of the root canal treatment.

Calcium Compounds↗
PubMed2005

A scanning electron microscopy evaluation of different root canal irrigating solutions.

The efficacy of solutions to remove the smear layer from human teeth was evaluated. One and 2.5% sodium hypochlorite, 1 and 5% calcium hydroxide, 0.2% (solution) and 2% (gel) chlorhexidine gluconate, 1% tea and distilled water as control were assessed. Fifty-six freshly extracted permanent human incisors were selected. Access cavities, conductometric measurements and apical sealing with wax were performed. Root canals were instrumented up to a #40 file at the apical level and with the step-back technique up to #60 file and irrigated with 25 ml of each solution. Roots were longitudinally cut and cleaning of dentinal walls in the coronal, middle and apical thirds was evaluated by scanning electron microscopy. The ANOVA test showed no statistically significant differences between the thirds treated with the same solution (p = 0.562), but showed differences between solutions (p = 0). Although none of the solutions showed complete elimination of the smear layer, sodium hyplochlorite solutions were the most efficientfollowed by calcium hydroxide solutions and chlorhexidine. Tea and distilled water were less effective.

Calcium Hydroxide↗
PubMedDate not supplied

Comparison of apexification with mineral trioxide aggregate and calcium hydroxide.

PURPOSE: The aim of this study was to compare mineral trioxide aggregate (MTA) with calcium hydroxide [Ca(OH)2] clinically and radiographically as materials used to induce root-end closure in necrotic permanent teeth with immature apices (apexification). METHODS: Fifteen children, each with at least 2 necrotic permanent teeth requiring root-end closure (apexification), were selected for this study. All selected teeth were evenly divided into 2 test groups. In group 1, the conventional calcium hydroxide apexification (control) was performed, whereas in group 2, the MTA apexification (experimental) was done. The children were recalled for clinical and radiographic evaluations after 3, 6, and 12 months. RESULTS: The follow-up evaluations revealed failure due to persistent periradicular inflammation and tenderness to percussion detected at 6 and 12 months postoperative evaluation in only 2 teeth treated with Ca(OH)2. The remaining 13 teeth appeared to be clinically and radiographically successful 12 months postoperatively. None of the MTA-treated teeth showed any clinical or radiographic pathology. CONCLUSIONS: Mineral trioxide aggregate showed clinical and radiographic success as a material used to induce root-end closure and is a suitable replacement for calcium hydroxide for the apexification procedure.

Aluminum Compounds↗
PubMed2006

Endodontic techniques for scouting the apical thirds of root canals.

It might be said that there are as many endodontic instrumentation techniques as there are operators, although no two clinicians perform the procedure in exactly the same manner. Despite differences, there are basic principles (correct diagnosis, adequate access, adequate irrigation, removal of the entire pulp, instrumentation to the minor constriction of the apical foramen, three-dimensional obturation, etc.) whose observance are consistent with long-term endodontic success. As a subset of these time-honored principles, there are guidelines and techniques for apical third "scouting" and instrumentation, which can also be considered universal, irrespective of the particular instruments or technique used for canal preparation. The purpose of this paper is to describe a scouting technique that is designed to optimize the apical part of root canal preparation. The author first heard the word "scouting" used in the context described by Dr. Clifford J. Ruddle.

Dental Instruments↗
PubMed2006

[Clinical management of open apices teeth with mineral trioxide aggregate (MTA) as apical barrier in adults].

OBJECTIVE: To evaluate the clinical effect of treatment of open apices teeth with mineral trioxide aggregate (MTA) compared with apexification using Vitapex in the adult. METHODS: The root canals of 41 anterior teeth and premolars with single canal and open apices in adults were cleaned and shaped, and then disinfected with calcium hydroxide. The apical root canals of 21 teeth in experimental group were filled with MTA to create a 3-5 mm apical barrier. The remainder of the canals was filled with AH plus and Obtura II gutta-percha. The canals of 20 teeth in control were treated with Vitapex. The root canals were then filled with Obtura II gutta-percha when the apical barrier could be detected. The visit times, period and result of the treatment were recorded for all cases. RESULTS: Good result was achieved in the most cases in the experimental group. The postoperative X-ray films showed that the canals of 15 teeth were obturated well. 6 teeth showed over-filling by 0.5-2 mm. The recalled patients declared their teeth to be asymptomatic except one. The recall radiographs indicated that the apical radiolucent areas of the teeth with pre-existing apical lesion decreased apparently or disappeared completely, except one tooth with large apical radiolucency. No new radiolucency was found around the roots. In the control group, the apexification of 11 teeth succeeded, and 9 failed. The average visit times was 3.5 in experimental group and 6.0 in control. The average period of the whole endodontic treatment was 11.8 days in experimental group and 306.8 in control. CONCLUSION: MTA is more effective and quicker than apexification in treatment of teeth with open apices in adults.

Adult↗
PubMed2006

[The reliability of digital periapical films in diagnosis of root resorption].

OBJECTIVE: To investigate the difference between digital periapical film and conventional film in the evaluation of tooth length and root resorption. METHODS: A standard for root resorption in vitro was developed based on 20 extracted upper central incisors. Digital periapical films and conventional periapical films were taken before and after the process of simulating root resorption at six different projection angles respectively. The tooth length and root resorption were measured on these films. The results were analyzed by paired-samples rank sum test. RESULTS: Significant difference on tooth length measurement was found between two types of films on the same projection angle. No significant difference on the length of root resorption calculated on digital and conventional films was found. CONCLUSIONS: The accuracy of the digital periapical film was greater than that of conventional periapical films. The conventional periapical film can still be used in the evaluation of root resorption.

Humans↗