Clinical and radiographic evaluation of the effects of the highpull headgear on the maxillary central incisors
Kroll, Dennis R.
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This investigation was designed to describe a method of treatment and to evaluate the effects of the highpull headgear when used alone or in conjunction with Class II mechanical forces on the maxillary central incisors using light 0.016 inch wire with or without torque. Our system employs a different concept (seen in conventional edgewise mechanics) in maxillary anchorage control. Since maxillary molars are not used for anchorage support minimum stabilization is necessary. This is accomplished by means of tip back bands in the maxillary arch wire. And therefore frees the operator to use more appropriate force systems; i.e., highpull headgear and Class II mechanics. Twenty-one patients, Class II, Division I age 10 through 15 years, were selected for this study. They were compared to 11 untreated Class II Division malocclusions. Using tracings of the standard lateral cephalograms various angular and linear measurements were recorded and analyzed. The Boston University Express System of treatment has been shown to produce favorable results in high angle and medium angle cases in which vertical sensitivity could produce adverse reactions. This study supports the fact that the highpull headgear: 1) Stops the eruption of the upper anteriors or intrudes the upper anteriors. 2) Resists the extrusive and maxillary rotating force of Class II elastics. 3) Moves the upper anterior teeth distally. 4) Important in torque activation and control. 5) Involved in overbite control.
PLEASE NOTE: This work is protected by copyright. Downloading is restricted to the BU community: please click Download and log in with a valid BU account to access. If you are the author of this work and would like to make it publicly available, please contact email@example.com.Thesis (M.Sc.D.)--Boston University School of Graduate Dentistry, 1972 (Orthodontics).Bibliography included.
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