Apexification in one step using an apical barrier of PRF and a plug of MTA can be considered a predictable treatment and may be an alternative to long-term revascularization failures.
Resorption of tooth structures can occur as a result of physiological, pathological, and idiopathic factors. Early diagnosis and appropriate treatment can prevent its serious complications. This case report presents surgical endodontic management of a trauma-induced perforating external root resorption, which was diagnosed with the help of cone beam computed tomography. Following root canal treatment, intentional replantation of the tooth was performed so as to expose the opening of the resorption defect to allow for complete debridement and closure. Eighteen months follow-up showed arrest of root resorption, and progressive healing of the defect.
Objective: The aim of this study was to perform a comparative evaluation of the effectiveness of ultrasonic tips versus the Terauchi file retrieval kit (TFRK) for the removal of broken endodontic instruments. Materials and Methods: A total of 80 extracted human first mandibular molars with moderate root canal curvature were selected. Following access cavity preparation canal patency was established with a size 10/15 K-file in the mesiobuccal canals of all teeth. The teeth were divided into 2 groups of 40 teeth each: the P group (ProUltra tips) and the T group (TFRK). Each group was further subdivided into 2 smaller groups of 20 teeth each according to whether ProTaper F1 rotary instruments were fractured in either the coronal third (C constituting the PC and TC groups) or the middle third (M constituting the PM and TM groups). Instrument retrieval was performed using either ProUltra tips or the TFRK. Results: The overall success rate at removing the separated instrument was 90% in group P and 95% in group T (p > 0.05) The mean time for instrument removal was higher with the ultrasonic tips than with the TFRK (p > 0.05). Conclusion: Both systems are acceptable clinical tools for instrument retrieval but the loop device in the TFRK requires slightly more dexterity than is needed for the ProUltra tips.
Aim:The aim of this study was to evaluate retention & fracture resistance of different fibre posts.Methodology:90 extracted human permanent maxillary central incisors were used in this study. For retention evaluation, after obturation, post space preparation was done in all root canals and posts were cemented under three groups. Later, the posts were grasped & pulled out from the roots with the help of a three-jaw chuck at a cross-head speed of 5mm/min. Force required to dislodge each post was recorded in Newtons. To evaluate the fracture behavior of posts, artificial root canals were drilled into aluminium blocks and posts were cemented. Load required to fracture each post was recorded in Newtons.Results:The results of the present study show the mean retention values for Fibrekleer Parallel post were significantly greater than those for Synca Double tapered post & Bioloren Tapered post. The mean retention values of the Double tapered post & the tapered post were not statistically different. The Synca Double tapered post had the highest mean load to fracture, and this value was significantly higher than those of FibreKleer Parallel & Bioloren Tapered post. The mean fracture resistance values of Parallel & tapered post were not statistically differentConclusions:This study showed parallel posts to have better retention than tapered and double tapered posts. Regarding the fracture resistance, double tapered posts were found to be better than parallel and tapered posts.
IntrOductIOnOral hygiene measures fail to completely clean the dental plaque from the difficult, inaccessible areas of teeth and as a result dental caries develop [1]. Partially erupted mesio-angular or horizontally impacted third molars that contact the cementoenamel junction of the second molar place this tooth at risk of developing caries in the distal cervical region [2][3][4]. The exposed distal root of the second molar is colonized by various pathologic bacteria and may lead to development of periodontal defect [5]. Major factors related with the impaction of third molar are lack of space, limited skeletal growth, distal eruption of dentition, vertical condylar growth, increased crown size, and late maturation of the third molars [6,7].Caries in second molar caused by an impacted or angulated third molar occasionally necessitates removal of the third molar and restoration of the carious defect. Furthermore, in some cases where the carious lesions are too large to be restored, the involved second molars are extracted, the result of which is a considerable loss of masticatory function. Distal surface caries on mandibular second molars can lead to problems in restoration owing to the frequent occurrence of subgingival caries accompanied by severe alveolar bone destruction at the distal area of the mandibular second molars. With this in mind, early detection and evaluation of the caries risk of the second molars associated with third molars might be helpful for the prevention of distal caries in the second molars. There has always been a controversy regarding the validity of prophylactic removal of impacted third molars [8,9]. However, in cases where the second molars are at a high risk of developing carious lesions owing to their proximity to the third molars, preventive extraction of the third molars can be recommended as a treatment method for improving the prognosis of second molars [10].As the studies relating the incidence of distal caries of second molar and the eruption status of the third molar including the angulations and vertical position of third molars are few, the present study was designed to analyse the correlation between the incidence of distal caries in second molars and their associated removal from the oral cavity due to tilted third molars. Based upon these findings, we can interpret whether the prophylactic removal of third molar to save the second molar is advised or not. MAterIAls And MethOdsA cross-sectional study was conducted and the radiographic data over a period of one year (November 2012-November 2013) was collected from the Department of Oral Medicine and Radiology of Maulana Azad Institute of Dental Sciences, Delhi. A total of 1187 radiographs (642 females and 545 males) of patients with age range: 18-55 years of third molar region (including all the quadrants and both the arches) were reviewed. The variables that we recorded were sex, age, angulation and eruption status of the third molar and proximity of the third molar to the cementoenamel junction of the second molar. The...
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