This in-vitro study tested the fracture resistance of endodontically treated molars with Mesial-Occluso-Distal (MOD) cavities restored with fibre reinforced composite material everX posterior in comparision with hybrid composite and ribbond fiber composite. Fifty intact freshly extracted human mandibular first molars were collected and were randomly divided into five groups (n=10). Group 1: positive control (PC) intact teeth without any endodontic preparation. In groups 2 through 6 after endodontic procedure standard MOD cavities were prepared and restored with their respective core materials as follows: group 2, negative control (NC) left unrestored or temporary flling was applied. Group 3, Hybrid composite (HC) as a core material (Te-Econom Plus Ivoclar Vivadent Asia) group 4, Ribbond (Ribbond; Seattle, WA, USA)+conventional composite resin (RCR) group 5, everX posterior (everX Posterior GC EUROPE)+conventional composite resin (EXP) after thermocycling fracture resistance for the samples were tested using universal testing machine. The results were analysed using ANOVA and Tukey's HSD post hoc tests. Mean fracture resistance (in Newton, N) was group 1: 1568.4±221.71N, group 2: 891.0±50.107N, group 3: 1418.3±168.71N, group 4:1716.7±199.51N and group 5: 1994.8±254.195N. Among the materials tested, endodontically treated teeth restored with everX posterior fiber reinforced composite showed superior fracture resistance.

Objective: The objective of this systematic review was to comprehensively assess the literature regarding the applications, accuracy, advantages and limitations of dynamic navigation in endodontics.Methods: Case reports and laboratory studies in the English language, which used the Dynamic Navigation System (DNS) for endodontic application and assessed the accuracy of treatment, the time required for treatment and iatrogenic errors were included. PubMed, Scopus, Embase and Web of Science were searched for eligible articles (up to July 2021). Additional hand searching of four peer-reviewed endodontic journals and a grey literature search were also carried out. A risk of bias assessment was done using the Joanna Briggs Institute (JBI) critical appraisal checklists. Data were extracted based on endodontic application of DNS, tooth type, DNS brand, accuracy, iatrogenic errors, and time taken, followed by qualitative analysis.Results: Fourteen articles (three case reports and eleven in-vitro studies) met the eligibility criteria and were included. The quality assessment revealed a low risk of bias, with mean scores of 83.34% for case reports and 84.09% for in-vitro studies. DNS was used for various clinical applications such as access cavity preparation, pulp canal obliteration, endodontic retreatment and microsurgery. The DNS brands used were Navident, X-guide, ImplaNav, and DENACAM. Due to the nature of the component studies, meta-analysis was not possible.Conclusion: Challenging clinical situations like pulp canal obliteration, conservative access preparation, endodontic retreatment and microsurgery can be managed efficiently with fewer iatrogenic errors in a shorter time using DNS. However, this systematic review’s evidence is low since the included articles are either case reports or in-vitro studies. Clinical studies are needed to test DNS efficacy among operators, including those who are less proficient and compare the accuracy of currently available systems. (EEJ-2021-12-190)

Background/Aim: Fragment reattachment is a procedure that can immediately restore form and function in crown‐root fracture cases and is considered a minimally invasive and cost‐effective treatment option. The aim of this systematic review was to analyze the methods used and the outcome of fragment reattachment for complicated crown‐root fractures of anterior teeth.Materials and Methods: Five electronic databases (PubMed, Web of Science, Embase, Scopus, and Google Scholar) were searched for English language articles regarding fragment reattachment after complicated crown‐root fractures of anterior teeth.Results: Twelve case reports and two case series were selected for this review after applying the inclusion and exclusion criteria. In eleven articles, the fracture line was exposed prior to reattachment. Root canal treatment was performed in all cases except one, where conservative pulp treatment was done prior to reattachment. A post was used as part of the restoration in 85% of the cases. Additional fragment preparation was done in 42% of the cases in the form of beveling and groove formation. Adhesive strategies used to reattach the coronal fragments were total‐etch, self‐etch, or self‐cure adhesive. Intermediate materials used for reattachment were resin cement, glass‐ionomer cement, composite and self‐adhesive cement. Treatment outcomes were favorable in all the included articles and the follow‐up period ranged from three months to seven years.Conclusion: Fragment reattachment after complicated crown‐root fractures of anterior teeth can be considered as a viable treatment option if the clinical conditions are favorable.