الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
This prospective randomized clinical trial study was carried out to
clinically evaluate lever arm and mini implant system during distalization
of upper permanent first molar.
In addition to the main aim, this study was also sought to asses and
evaluate the dental sagittal, vertical and transverse changes. Furthermore,
the skeletal and soft tissue changes associated with distalization were
assessed cephalometric and cast analysis.
The sample in this study consist of 10 egyptian patients (age, 18 -
20 years) each exhibiting a dental class II molar relationship with a fully
erupted second molar and extracted third molar.
For each subject a standard full set of orthodontic records were
taken pre and post distalization.
After the appliance placement (a buccal and palatal lever arm) the
mini implant was inserted bucally and palataly between the upper
permanent second premolar and first molar.
A two point of force application mesial to the upper first molar and
parallel to the occlusal plane was applied, so that the force vector would
pass through the estimated center of resistance of upper first permanent
molar.
All subjects were recalled every two weeks for follow up and
distalization force reactivation. Evident improvement in dental molar
relationship was obvious after an average (1.5 - 4) months of distalization
with lever arm and mini-implant system.
The obtained data were tabulated and statically analyzed using the
SPSS program “statistical package for social sciences”.