A problem that often precipitates in the Orthodontic treatment of adult patients is the presence of periodontal disease and loss of bone support. As a result of it, the center of resistance of the tooth is modified & thereby performing controlled tooth movements becomes complicated. This scientific work investigates the issue deeper and substantiates that the forces and moment to force ratios needed to be applied during an Orthodontic treatment must be adapted in the periodontally compromised conditions. Experimentally derived values of force and moment to force ratios have been provided for...