Introduction: Preserving the natural tooth by endodontic treatment or tooth extraction and implantation is an important dilemma that requires careful evaluation of the factors that affect the final treatment and patients' quality of life. The aim of this study was to evaluate the quality of life related to oral health after single tooth implant treatment in comparison with endodontic treatment.Materials & Methods: This study is a cross-sectional analytical study to evaluate the quality of life of 80 patients referred to Isfahan Azad Dental School in 1399-1400 in two groups (endo and implant) whose anterior teeth have been endodontically treated and had also a history of anterior single tooth implant with functional crown in a recent year, with using Oral health-related quality of life questionnaire (OHIP-12). The collected data were analyzed using Shapiro-Wilk test and independent T-test with an error level of 0.05% (p value < 0.05).Results: Mean patient's oral health-related quality of life after single tooth implant and after endodontic treatment was respectively 16.95 and 16.83 and all the studied parameters were shown to be above average. There was no significant difference between the type of treatment and patient's oral health-related quality of life (p value = 0.885). There was a significant difference between patient's gender and oral health-related quality of life in implant treatment (p value = 0.036).Conclusion: The oral health-related quality of life after single tooth implant treatment was comparable to endodontic treatment in patients and it was higher than average in both treatments.

Introduction: Inflammation and infection can spread from the dental pulp to the periodontal tissue and from the periodontium to the pulp. Given the challenging nature of diagnosing endodontic-periodontal lesions and the importance of appropriate treatment to improve dental prognosis, this study was performed to evaluate the knowledge of dental students about the diagnosis of pulp and periodontal lesions. Materials & Methods: In this analytical observational study, a questionnaire was designed to assess knowledge on pulp and periapical lesions in three areas of theoretical knowledge, knowledge in diagnosis and knowledge in treatment in the second semester of the academic year 2021 and filled out by 400 dental students representing 15 cities of Iran. Data analysis was performed by Friedman, Wilcoxon and Mann-Whitney tests (α = 0.05). Results: Percentage of correct answer of dental students to the questions related to theoretical knowledge 65.70 ± 18.39, percentage of correct answer to the questions of students' diagnostic knowledge 50.75 ± 33.28, percentage of correct answer to the questions of treatment knowledge 52.13 ± 23.93 and the percentage of correct answers to the questions of knowledge in total was 56.68 ± 16.35, which is statistically significant in terms of knowledge in the three areas studied (p value < 0.001). Conclusion: In the present study, it was shown that the highest level of appropriate knowledge in students is in the field of theoretical knowledge of endodontic-periodontal lesions and the least level of appropriate knowledge was in the field of diagnosis of these diseases. The overall knowledge of students in this study about endodonticperiodontal lesions was shown to be moderate.

Introduction: The choice between the two modes of treatment, endodontic treatment and single tooth implants are very different depending on the dentist, design, definition of successful outcomes, evaluation methods, and sample size. The aim of this study was to compare the clinical and radiographic results of single tooth implants versus endodontic treatment with post and crown restoration in patients referred to the School of Dentistry of Islamic Azad University of Isfahan Materials & Methods: In this cross-sectional analytical study in the academic year 2021, 90 (46 females and 44 males) patients after recording demographic information and medical status, during three different time intervals post treatment (under 3 years, 3 to 5 years and Over 5 years) were examined clinically and radiographically (periapical). Outcome of treatment was classified based on clinical and radiographic findings into three categories: successful, surviving and unsuccessful. Data were analyzed using Chi-squared test (α = 0.05). Results: In this study, 60% of women and 40% of men had endodontic treatment and 42.2% of women and 57.8% of men had single tooth implants. There was no significant difference between the treatment outcomes in the studied groups (p value > 0.521). There was no statistically significant relationship between gender and type of treatment as well as gender and treatment satisfaction (p value > 0.05). Conclusion: Considering the preservation of natural teeth, if possible, root canal treatment is the main treatment of choice, otherwise a single-tooth implant can be a good alternative to missing or extracted teeth in terms of successful outcomes.

Introduction: Teeth loss and its consequences, such as mental discomfort, most often negatively affects one's health and well-being. Dental implants were introduced in an attempt to raise patients’ satisfaction and improve health and quality of life in all dimensions. Hence, this study was performed to check the impact of implantation on the oral health indices in patients who were candidates for implant treatment in Isfahan city. Material and methods: In this analytical cross-sectional study, the lifestyle quality of 73 patients who were referred to Isfahan’s Islamic Azad Dental University (Khorasgan) and its affiliated private centers, was assessed using the OIDP index before and after their implant treatment between 2019 and 2020. Also, data analysis was done using Independent t-test, Paired t-test and analysis of variance ANOVA test (α = 0.05). Results: In the current study, the most common problem and with the most effect on oral satisfaction quality were teeth lost and extractions, respectively. Majorly, the effects were evident on the eating habits (83.6%), satisfaction of communication with others (68.5%) and quality of smile (64.4%). In the questionnaire, an attenuated score of OIDP was recorded, before the implant treatment compared to that of post-treatment, which was statistically meaningful (p value < 0.05).  Conclusion: According to the current study data, we can conclude that implant treatment can have a positive effect on the patients’ lifestyle quality.