Background: Peri-implantitis is an irreversible inflammation that leads to crestal bone loss around the implant. Its symptoms include radiographic bone loss, increased probing depth, bleeding on probing, and pus discharge. This study aimed to investigate the relationship between radiographic bone analysis and clinical factors in patients with peri-implantitis.Materials and Methods: This cross-sectional observational clinical study was conducted on 38 patients with symptoms of peri-implantitis, referred to the private department and dental clinic of Isfahan Azad University. At first, by obtaining informed consent, periapical digital imaging was taken from the patient's implant with a parallel technique and the amount of vertical bone resorption was checked in millimeters. The amount of vertical bone resorption of the implant was divided into three categories: vertical bone resorption was less than 1.5 mm, between 1.5 and 3 mm, and more than 3 mm. Then, the amount of bleeding, the depth of probing, and the presence of pus were checked. Data were analyzed with t-test, ANOVA, and Pearson's correlation coefficientResults: There was a significant and direct difference between bleeding on probing and vertical bone resorption (P<0.001, r=0.466). There was also a significant and direct difference between probing depth and vertical bone analysis (P<0.018, r=0.278). The pus variable was negative for all peopleConclusion: Bleeding on probing and depth of probing have a direct relationship with vertical bone resorption in patients with peri-implantitis and with the increase of radiographic bone resorption, depth of probing and bleeding on probing increases in patients. Manuscript profile

Background: Temporomandibular joint disorders (TMJD) can cause joint pain, trismus, and headaches, which negatively impact people's quality of life and may lead to a decrease in educational level among students. Thus, this study aimed to investigate the symptoms of TMJD among students at Isfahan Azad Dental Faculty. Materials and methods: This descriptive-analytic study involved 62 students from Isfahan Azad Faculty of Dentistry. Pain intensity (cephalic, joint, muscle) was evaluated using the VAS scale. After completing the evaluation of the students and registering the information in the relative checklist, data were analyzed using Exact Fisher and chi-square statistical tests(α=0.05). Results: The study found that students with headaches did not have a higher incidence of restriction in opening their mouth and joint pain. However, students with headache had lower rates of joint noise (p = 0.04). The age of students was not related to TMD (p>0.05), and gender was not related to joint noise (p= 1.00) and joint pain (p= 0.70). The malocclu-sion status of students was not related to TMD. Parafunctional habits were related to head-aches among students (p< 0.001). Conclusion: Severe headaches were common among studied students which could be related to temporo-mandibular joint disfunction as it was related to parafunctional habits. TMD symptoms were not related to age, gender (except for mouth opening restriction) and occlusion class type . Manuscript profile