https://www.selleckchem.com/products/e6446.html Data were analyzed using SPSS software version 20. Results The results showed that there was no significant relationship between any of the variables with being left- or right-handed. A significant relationship was observed only between the lowest plaque index and handedness (P less then 0.05). Conclusion A relationship cannot be considered between the handedness of children and their oral health status.Background Anal fissure which is defined as a longitudinal tear in anoderm below the dentate line is one of the most common benign diseases of anorectal area. Severe pain during the defecation and emotional stress that it causes may reduce people's quality of life. Aims In this randomized clinical trial, we aimed to compare the efficiency of the topical ointment with medical treatment and surgical lateral internal sphincterotomy. Method This is a randomized clinical trial of 550 patients who were treated for chronic anal fissure. Patients were randomly divided into 4 groups according to the treatment type they received. Results In a vast majority of the patients, the primary complaint was pain (92.3%) and bleeding during defecation (62%). Both pain relief and healing of the fissure, which are the components of response to treatment, had not been observed in 56 (37.3%) patients of topical nitroglycerin ointment group until the second month. Among the recalcitrant patients in both topical nitroglycerin (56) and topical diltiazem ointment (47) groups, 27 (48.2%), and 36 (76.5%) patients underwent surgery, respectively. The best response to treatment was also obtained in lateral internal sphincterotomy group. Conclusion LIS is still the gold standard for the treatment of chronic anal fissure when the physicians would like to avoid recurrence and obtain the best pain relief.Objectives To study the prevalence of middle mesial and middle distal canals in permanent mandibular molars in Egyptian subpopulation using micro-compute