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@#Introduction: Patellofemoral Pain (PFP) in workers is a common musculoskeletal problem that has a significant financial impact on industrial companies. The objective of this study was to investigate the prevalence of PFP, its demographic, occupational, and psychosocial risk factors, and the association of genu varum with PFP. Methods: In this cross-sectional study, simple random sampling was used to select 1570 male workers in a large Iranian automobile manufacturing company. Demographic, occupational, and psychosocial data were collected through self-report questions. There were also questions about any occurrence of PFP during the past year. The medial tibial intercondylar distance was measured, and a distance of more than 60 mm was defined as genu varum. Results: The prevalence of PFP occurrence in the past year was 34.9%, and the prevalence of genu varum was 14%. The prevalence of PFP occurrence in the past year was associated with salary (P<0.001), the job satisfaction (P<0.001), duration of standing per day (P<0.001), duration of walking per day (P=0.042), carrying loads (P<0.001), getting physical exercise (P<0.001), and genu varum (P<0.001). Age, weight, height, body mass index (BMI), work duration, and having a second job were not associated with PFP. There was an association between job satisfaction and having a non-sedentary job. Logistic regression revealed job satisfaction, duration of standing, and genu varum as predictors of PFP. Conclusion: The prevalence of PFP was high in this automobile manufacturing company workers. This was the first study of the prevalence of genu varum and its association with PFP in Iran. The results show an association between genu varum and PFP. However, according to the results of this study and similar studies in other countries, further investigations of PFP and its risk factors are a necessity.
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PURPOSE: The aim of this study was to evaluate the Bonwill triangle of Korean using the cone beam computerized tomography (Cone-beam CT). MATERIALS AND METHODS: 120 Koreans (60 males and 60 females) who visited Daejeon Dental College Hospital of Wonkwang University and who underwent the Cone-beam CT were selected. The Cone-beam CT images were analysed with Invivo 5.1 (Anatomage, San Jose, USA). After reorientation of axis, the intercondylar distance was measured by clicking both middle points of condyle. And the condyle-incisor distance was measured by clicking the middle point of condyle and contact point of the mandibular central incisor's incisal edge. The collected data were analysed using the SPSS Version 23.0 (IBM Inc., Armonk, USA) and statistical significance was verified by gender using independent t-test. RESULTS: The mean intercondylar distance of Korean was 105.9 mm, and the male (108.3 mm) was statistically significantly larger than the female (103.4 mm). The mean condyle-incisor distance of Korean was 105.2 mm, and the male (108.1 mm) was statistically significantly larger than the female (102.3 mm). CONCLUSION: The mean intercondylar distance of Korean in this study was 105.9 mm that was smaller than well-known 110 mm of Caucasian and the male was statistically significantly larger than the female. Within the limitations of this study, it would be necessary to use the articulator which can adjust the intercondylar distance according to the individual for prosthodontic treatment of Korean.