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Abstract
Ever since Sandstedt (1) first reported his histologic findings on a dog in 1901, the complex biologic mechanisms involved in the phenomenon of tooth movement have remained somewhat obscured. The experimental model for the following investigation was similar to that utilized by Church (1971). The purpose of this investigation was to repeat the experiment done by Church (14) at the 21 day time interval and to ascertain the presence of fat or fibrin within these vacuoles or spaces, if they existed, by using a more appropriate specific histologic staining technique. The presence of fibrin would suggest the morphologic evidence offered by Church to have been in error and implicated the presence of blood vascular channels. Lastly, the possibility of these spaces to have been unknown artifacts would be investigated.