ABSTRACT
Statement of Problem: Preservation and maintenance of pulpal vitality is the main objective in endodontics. A recently developed material, mineral trioxide aggregate [MTA], is recommended for vital pulp therapy because of its physical characteristics and bioactive properties. Although the majority of these studies have been performed on the teeth with open apices, further evaluation of the teeth with closed apices seems to be necessary
Purpose: The purpose of this study was to evaluate the pulpal reaction to MTA after pulpotomy in permanent molar teeth with caries
Methods and Material: In this clinical case series study, 17 permanent molar teeth of 16 patients with a carious exposure were treated, using a partial pulpotomy technique. The age of the patients ranged from 20 to 30 years with an average of 25.2 years. Clinical and radiographic examination revealed a pulpal response within normal limits and normal appearance of the periradicular area respectively. After isolation, caries removal and pulpal exposure, access cavity was prepared using a sterile diamond bur with cooling system. After hemostasis, 2 to 4 mm of MTA [Angelus] paste was placed on the fresh wound. The teeth were restored 5-7 days later with amalgam or composite. The patients were scheduled for follow-up at an interval of 2, 6 and 12 months, and clinical and radiographic findings were established
Result: An overview of the data with respect to the clinical and radiographic findings at 2, 6 and 12 months of follow-up showed 100% success rate
Conclusion: Pulpotomy therapy, if the teeth are appropriately selected and MTA is used in suitable conditions especially when conventional treatment is not possible, gives a chance to the pulp to recover and could be the treatment of choice. In case the treatment fails, retreatment thereafter is possible. Nevertheless, further investigations with more samples are recommended for final judgment
ABSTRACT
Introduction: Bacteria and their by-products are the main cause of pulpal and periapical diseases. Complete debridment and disinfection of the root canal is essential in order to sustain the long term successful results following root canal therapy. This study aims at comparing the antibacterial effect of NaoCl, Thyme oil, Hydrated Calcium Oxide and Normal Saline on selected bacteria isolated from infected root canals
Materials and Methods: Bacteria were collected from 25 infected root canals of patients who had not received antibiotics. The bacteria were collected in the tubes and transfered for bacteriologic examination. Streptococcous viridance and black Pigmented Bacteroid groups were detected by specific bacteriological examination. The experimental solutions were serially diluted 8-folds in saline. A certain volume of bacteria was added to each diluted solution. After 1, 5 and 15 minutes, the solution of each tube was poled onto 3% sheep blood agar plates and incubated at 37°c for 48 hours. The grown colonies were counted and the results were recorded
Results: The results of this study showed a significant antibacterial effect of thyme oil, hydrated calcium hydroxide and sodium hypocholorite on selected bacteria even in low concentration. Normal saline did not show any antibacterial effect
Conclusion: These findings recommended further studies on other aspects such as tissue toxicity, tissue solving and biocompatibility properties of these solutions to be applied for clinical use
ABSTRACT
The efficacy of dentin bridge formation of mineral trioxide aggregate [MTA] and calcium hydroxide were compared following pulpotomy in young dogs. Forty-two mandibular permanent premolars teeth of seven 6-month-old dogs were used in this study. Following anesthetizing the animals, rubber dams were applied and the teeth were pulpotomized. Then the wounds were dressed with either MTA or calcium hydroxide, respectively. The animals were perfused with 1 to 4 months later. The jaws containing the pulps and the surrounding dentins were prepared and examined histologically by two independent evaluators blinded to the treatment groups. Dentin bridges were formed in all of the examined pulps with the mean thickness of 246 microm for MTA and 244 microm for calcium hydroxide groups. Tunnel defects and porosities within the dentinal bridges in the calcium hydroxide cases were more evident than those of the MTA-treated cases. In this study, 2 of 33 MTA treated cases and 11 of 37 calcium hydroxide cases demonstrated acute and chronic inflammation of pulps. It appears that pulp reaction to MTA is more favorable and this material is more suitable than calcium hydroxide for pulpotomy in young permanent teeth
ABSTRACT
Background: there is little systematic research about the efficacy of multimedia-based system for learning in medical sciences. The purpose of this study was to evaluate the efficacy of an interactive multimedia courseware package to demonstrate access cavity preparation for undergraduate dental students in preclinical endodontics course and compare with tutorial method of education
Methods: this study was performed on 62 undergraduate dental students. The students were randomly assigned in two groups of 31 each. The first group was instructed by interactive system using computer assisted learning [CAL], and the second group was instructed by conventional tutorial sessions in laboratory [Lab]. The students' scientific knowledge and overall scores were compared between two groups
Results: the students' scientific knowledge and retention showed no significant difference between two groups. In addition, students' attitudes were not significantly different between two groups
Conclusion: CAL software packages has the same efficacy as conventional method in preclinical endodontics course and can be developed in some branches of dentistry
ABSTRACT
Surgical endodontic endosseous implant by embedding an inert chrome-cobalt alloy through the root canal into the osseous structure is a reliable procedure to lengthen the existing root and provide individual tooth stabilization. The implant described in this case report with up to 10 years follow up was considered successful on the bases of clinical and radiographic evidence. The practical technique illustrated in this case may be used confidently in the cases with periapical radiolucency by the practitioner
Subject(s)
Humans , Female , Dental Implantation , Root Canal Therapy , Dental CariesABSTRACT
Calcium hydroxide has been the material of choice for apexification. Because of variability of treatment time, financial concern, unpredictability of apical closure and difficulty in patient follow-up, sometimes when traditional apexification cannot be performed. This case report describes an alternative technique using calcium hydroxide as an apical plug to develop an apical barrier in a pulpless tooth. This technique is an easy method requiring only a single visit to develop an apical stop to facilitate dense obturation