Root curvature is one of the major problems encountered with during orthodontic treatment. The debate of whether to try and continue or extract the tooth is still confusing. Amount of force and predicted bone or root resorption are not fully ascertained. The study utilized cosmoswork 2007 to simulate anterior teeth (incisor and canine). Ten different models were constructed. They were all similar in all aspects except the location and severity of root curvature. A 3-D parabolic tetrahydral solid mesh was made and different types of orthodontic tooth movements were simulated for each model. Results revealed that the increase in severity of root curvature was accompained with an increase in the maximum equivalent stress inside the root. Conversely, there was a decrease in the maximum equivalent stress inside the periradicular bone. This was applicable on all types of studied orthodontic tooth movements. It was also concluded that the radicular stress was directly proportional to the square angle of curvature.