Cone-beam Computed Tomography Volumetric Analysis and Comparison of Dentin Structure Loss after Retrieval of Separated Instrument by Using Ultrasonic EMS and ProUltra Tips (original) (raw)
Related papers
Quintessence international, 2018
OBJECTIVE The goal was to investigate the clinical value of two-dimensional radiographs and different radiographic measurement techniques before instrument removal with a microsonic technique. The aim was to find an easy-to-use technique for predicting the success of removal and case evaluation. Additionally the quality of root canal filling after instrument removal was assessed. METHOD AND MATERIALS This retrospective study analyzed patients' records and preoperative and postoperative periapical radiographs made using the paralleling technique. On preoperative radiographs, canal access angle and Schneider and Weine angle of root canal curvature were measured and compared. The Schäfer method was used for measuring the radius of curvature. In cases of successful removal taper, homogeneity and length of obturation were evaluated on postoperative radiographs. RESULTS A total of 123 cases of instrument removal were investigated. In total, 97 fragments (78.9%) were removed successful...
European journal of dentistry, 2014
The aim of this study was to compare the amount of apically extruded debris during preparation with ProTaper Universal (Dentsply Maillefer, Ballaigues, Switzerland), ProTaper Next (Dentsply Maillefer), a reciprocating single-file (WaveOne; VDW GmbH, Munich, Germany), and a self-adjusting file (SAF; ReDent Nova, Ra'anna, Israel). Fifty-six intact mandibular premolar teeth were randomly assigned to four groups. The root canals were prepared according to the manufacturers' instructions using the ProTaper Universal, ProTaper Next, WaveOne, and SAF. Apically extruded debris was collected in preweighted Eppendorf tubes during instrumentation. The net weight of the apically extruded debris was determined by subtracting the preweights and postweights of the tubes. The data were statistically analyzed using the one-way analysis of variance and the least significant difference tests at a significance level of P < 0.05. A measurable amount of debris was apically extruded in all grou...
Revista de Chimie, 2020
Fracture of endodontic files can be considered a real concern during root canal treatment. This procedural accident is caused both by overusing instruments due to economic reasons and using an incorrect technique in root canals with difficult anatomy. A broken endodontic file does not always regard the treatment as a failure. Frequently the broken fragment can be bypassed, and the root canal treatment completed. In other cases, when the file is separated in a tooth with associated apical disease, its retrieval using ultrasonic tips is advised. Separation of a file usually occurs in molars, mainly in the mesiobuccal canal due to major curvature, poor access or small diameter. Our research was conducted to determine the in vitro efficiency of the ultrasonic removal method and the bypass technique by using 40 extracted molars with moderately curved roots. #25 K-files were deliberately broken in the middle third of mesiobuccal root canals after making a small excavation in the apical th...
Retrieval of Separated Intracanal Endodontic Instruments: A Series of Four Case Reports
Cureus, 2023
The separation of an endodontic instrument during a root canal procedure is one of the most common endodontic mishaps. Separation of endodontic instruments may block access to the apical portion of the root and hamper the disinfection process. It obstructs the appropriate debridement of the canal apical to the fragment, jeopardizing the treatment's outcome. However, due to the advancements in the methods and armamentarium, the effective retrieval of a separated instrument (SI) from the root canal has become possible. This paper includes a case series of management of separated instruments whereby SI was successfully removed in four cases. The instruments were separated intracanal at various levels in the middle and apical third of maxillary and mandibular molar teeth. The level of separation was located, staging performed, and SI was removed using an ultrasonic device under magnification. Removal of the SI was followed by obturation till the entire working length and subsequent post-endodontic restoration. Patient satisfaction with treatment outcomes in all cases was good. Case evaluation, good armamentarium, adequate knowledge along with good clinical skills and experience aid in the successful retrieval of separated instruments. Removal of the instrument without further damage to radicular dentin is important to maintain the integrity of the tooth.
Efficacy of five rotary systems versus manual instrumentation during endodontic retreatment
Brazilian Dental Journal, 2011
The purpose of this study was to evaluate the efficiency of ProFile, GT, ProTaper, Race and K3 rotary instruments compared with hand K-files for removal of gutta-percha during retreatment. Sixty mandibular premolars were instrumented with GT rotary files and filled by thermomechanical compaction of gutta-percha and AH Plus sealer. The teeth are randomly divided into 6 groups of 10 specimens each. The roots were split longitudinally, digital images were created using a flatbed scanner, and the areas with remaining filling material were demarcated using Image Tool 1.21 software. The results indicate that GT left significantly less (p<0.05) remaining filling material (1.18 ± 1.47) than hand (3.70 ± 3.16) and Hero instruments (2.99 ± 2.58). There was no statistically significant difference (p<0.05) among the others techniques: ProFile (1.99 ± 2.66), ProTaper (2.00 ± 1.99) and K3 (2.71 ± 2.87) when compared with GT. In conclusion, GT, ProFile, ProTaper and K3 were more effective in removing gutta-percha than manual and Hero instruments.
Pesquisa Brasileira em Odontopediatria e Clínica Integra, 2014
Objective: To make an in vivo comparison of the amount of time required for root canal instrumentation of inferior deciduous molars either using rotary or manual techniques, and root canal filling of the same teeth. Material and Methods: Eight participants ranging from six to eight years of age that presented mandibular deciduous molars with root canal treatment indication were selected. Manual instrumentation with stainless steel K-files was performed in group I, and rotary instrumentation with Pro Taper rotary system was performed in group II. Results: T-test was used to determine mean value differences for the mesiolingual (ML) and distal (D) canals, showing no statistically significant differences (p = 0.912 and p = 0.366, respectively). The Mann-Whitney test was performed to detect mesiobuccal canal (MB) mean value differences, which were not statistically significant (p = 0.200). As to mean time required to perform canal filling for each group (manual and rotary) no statistically significant differences (p = 0.715) were found. Conclusion: Root canal preparation with rotary nickel-titanium instruments can be an alternative to mechanical instrumentation, although instrumentation and obturation time was not reduced.
Aim: The purpose of current survey is to investigate the opinions and attitudes of endodontists towards the intracanal separation of endodontic instruments, attending a national conference in India. Materials and Methods: 1000 copies of the questionnaire were circulated at the 28 th IACDE and 21 st IES National Conference, held at Hyderabad, amongst the Endodontists and students pursuing post-graduation in conservative dentistry and endodontics at various colleges across the country, on the issue of instrument separation. The survey participants were asked about experience of instrument separation, management of fractured instruments, techniques used for removal of fractured instruments. Results: This survey elicited a response rate of 68.5%. The respondents of our survey comprised of 73.4% being post graduate students and 26.6% being staff delegates. Of the respondents, 51.4% would use an endodontic file for 2-5 times before discarding. Files manufactured by Nickel-Titanium alloy were most commonly separated in root canal (64.4%). Step back technique is more prone for separation of instrument (60.4%). The majority of respondents reported that they would try to retrieve fractured instruments located in the coronal one-third (71.7%), bypass when located in middle third (69.1%), leave and review when located in apical third (76.8%) of root canal. The most frequently used technique for the retrieval of fractured instrument was ultrasonic (39.7%). Overall, 35.2% of the respondents reported experience of root perforation as a complication during retrieval of fractured instruments. Most respondents have reported a poor success rate in retrieving the fractured instrument when in apical third (91.2%). A total of 66.7% of respondents noticed highest incidence of fracture in mesial root of mandibular molar. 45% preferred using microscope for removal of separated instrument. Conclusion: General awareness, knowledge and understanding of most aspects related to fracture of endodontic instruments was apparent among majority of the participants.
Case Report, 2022
Instrument separation during root canal treatment is one of the most unpleasant mishaps. Several techniques have been described to retrieve the separated instruments; however, they generally require specific tools that are not always available at dental clinics. This case report aims at presenting a simple alternative technique for the removal of root canal instruments separated during endodontic treatment. Endodontic retreatment was indicated for a maxillary lateral incisor of a 19-year-old patient. The radiographic examinations revealed the presence of a separated (fractured) instrument beyond the apical part of the canal. Retreatment was initiated by removing the obturated materials. After several unsuccessful attempts to retrieve the broken fragment, a hypodermic needle with chemically self-cure acrylic resin was used under an endodontic microscope to remove the separated fragment successfully. The retrieval technique used in this case was safe, simple, and low cost.