Changes in the vascularity of the periodontal ligament during tipping and bodily movements at varying degrees of force

Date
1971
DOI
Authors
Schneider, Stephen A.
Version
URI
https://hdl.handle.net/2144/45927
OA Version
Citation
Abstract
The present study was undertaken to determine the effects of various degrees of force on the vascularity of the periodontal ligament. A ratio of force values needed to produce vascular occlusion was established. As four times more force was required to cause vascular occlusion during bodily movement as compared to tipping movement, the ratio was determined to be 4:1. Such information could be of practical significance in clinical application. Since the ideal force value for efficient tipping movement of teeth is regarded as being in the 2-4 oz. range depending on the number and type of teeth to be moved, then a force four times stronger could likely result in a very efficient means of bodily movement when proper mechanics are utilized. Also the relatively high forces which were needed to produce vascular occlusion would seem to indicate that a very efficient mechanism exists within the periodontal ligament and surrounding areas which functions to dissipate forces applied to the teeth, thereby tending to prevent excessive pressures by decreasing forces to more "physiological limits".
Description
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Thesis (M.Sc.D.)--Boston University School of Graduate Dentistry, 1971 (Orthodontics).
Includes bibliographic references (leaves 29-32).
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GSDM: Historical Theses and Dissertations (BU access only)