We investigated an outbreak of postoperative shoulder arthritis due to Propionibacterium acnes infection in nondebilitated patients. Risk factors were male sex, the order in which surgery was performed during the daily operating schedule, and increased duration of the surgical procedure. After modification of the ventilation system and implementation of improved cleaning methods in the operating theater, no new cases were recorded.
Background and Aim: Complete removal of gutta-percha from the root canal system and its remnants is a challenge in endodontic retreatment. This ex-vivo study aimed to assess the efficacy of XP-Endo Finisher R (XEFR) in removing root filling remnants from straight canals of mandibular premolars in root canal retreatment.
Materials and Methods:In this ex-vivo study, 30 single-rooted mandibular premolars with straight roots were selected. The root canals were instrumented and filled. Retreatment was then performed using D RaCe system. Teeth were then randomized into two groups of A and B (n=15). In group A, root canal retreatment was completed with XEFR. In group B, XEFR was not used. To evaluate the filling material remnants, the roots were split into halves and assessed under a stereomicroscope and then photographed. The amount of remaining gutta-percha in the coronal, middle and apical thirds of the roots was measured by AutoCAD software and analyzed with two-way ANOVA. Results: The amount of residual filling material was significantly lower in the coronal, middle and apical thirds and the entire root length in XEFR group (P<0.001). Conclusion: Use of XEFR significantly decreased the residual root filling material in the root canals.
Background and Aim: One of the main concerns in dental society is the enormous prescription of antibiotics. Unnecessary prescription of antibiotics causes resistant bacterial species. The aim of this study was to evaluate the attitude of dentists toward antibiotic prescription in endodontic treatments and the role of related factors. The study was conducted in Sanandaj city, Kurdistan province, Iran, in 2017. Materials and Methods: This quantitative cross-sectional study involved active dentists in Sanandaj city. Their attitude toward antibiotic prescription was evaluated using 20 questions (10 in favor of prescribing antibiotics and 10 against it) with the following options: "totally agree, agree, disagree, and totally disagree". The role of related factors including age, sex, work experience, level of interest in endodontic treatments, and the number of endodontic cases, were analyzed by Chi-square test. Results: The study was conducted on 145 dentists (72.5% males and 27.5% females) in Sanandaj city. The mean age of the participants was 39±11 years, and their mean work experience was 13±8 years. 7.5±0.9% of the dentists chose the "totally agree" option, and 92.5±1.1% of them chose the "agree" option regarding antibiotic prescription in endodontic treatments. Conclusion: It seems that the positive attitude towards antibiotic prescription in endodontic treatments was satisfactory among the studied dentists.
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