A roentgenographic cephalometric comparison of bite opening efficacy using cervical traction gear, cervical traction gear with meisal spur, and anterior high pull gear
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Abstract
The effects of extraoral traction on anterior bite opening were studied. Twenty-seven patients were divided
into three groups and treated with either cervical traction,
cervical traction with incisal spur, or anterior high pull
gear.
Significant changes in molar extrusion and mandibular
plane contributed directly to overbite reduction. The CTG
with Kuhn spur exerted maximum influence on these variables.
Incisor intrusion, palatal plane and occlusal plane
were not shown to be significantly effected by extraoral
traction. However, the data was suggestive of vari ability
between appliances. Perhaps if the sample size was increased,
significant differences might become apparent.
The greatest reduction of apical base discrepancy was
observed with appliances having posterior force vectors .
The anterior high pull gear showed little success in reducing
point A.
Description
Thesis (M.Sc.D.)--Boston University School of Graduate Dentistry, 1975. Orthodontics.
Bibliography included.
Bibliography included.
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This work is being made available in OpenBU by permission of its author, and is available for research purposes only. All rights are reserved to the author.