Much research has been done to determine closure forces of patients. This study was designed to determine the effect of certain variables on the maximum protrusive force of patients.
Custom mandibular clutches were fabricated out of blue tray resin for each patient. A clutch adaptor was fastened to the clutch to secure the weight testing apparatus. Maximum protrusive forces were recorded for each patient when the force paralleled the Frankfurt line and the angle of the eminence. This testing was accomplished with and without the use of a maxillary clutch, designed to allow the closure muscles to brace the mandibular guide pin against the maxillary guiding plane.
All thirteen subjects tested could apply significantly more bilateral protrusive force when the angle of the eminence was paralleled and a maxillary clutch utilized. The range of bilateral maximum force for the thirteen patients was about 20-60 pounds.
William R. Rothgeb
John L. Tomlinson
James R. Wise
Virgil M. Lau
Edwin F. Shryock
Master of Science (MS)
Year Degree Awarded
Date (Title Page)
Subject - Local
Loma Linda University Libraries
This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.
Suya, Hajime, "Measurement of the Force of the External Pterygoid Muscles" (1972). Loma Linda University Electronic Theses, Dissertations & Projects. 1635.
Loma Linda University Electronic Theses and Dissertations
Loma Linda University. Del E. Webb Memorial Library. University Archives