Root Resorption in Bicuspid IntrusionA Scanning Electron Microscope Study
Abstract
A scanning electron microscope (SEM) study of the topography of human root resorption under continuous intrusive orthodontic loadings of varying magnitude and duration. Loss of root length can occur within 35 days with forces as light as 50 grams. After 70 days with mean activations ranging from 50 to 200 grams, progressive apical resorption was accompanied by regions of cellular cementum repair.
Contributor Notes
Dr. Harry is in the full-time practice of orthodontics. He is a dental graduate (B.D.S.) of The University of Adelaide, where he also earned an M.D.S. degree in orthodontics
Dr. Sims is Deputy Chairman of the Department of Dental Health and Reader in Orthodontics at the University of Adelaide. After completing a B.D.S. degree in Adelaide, graduate orthodontic studies were undertaken at Adelaide University, St. Louis University and Boston University, where he received an M.Sc.D. degree