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KMID : 0353319820050010031
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Oral Biology Research
1982 Volume.5 No. 1 p.31 ~ p.38
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Clinical atudy of the piston apring screw
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Lee Dong-Joo
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Abstract
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This study was undertaken to estimate the force of the piston spring screw and the force change as time went by. Also it was undertaken to make the removable orthodontic appliance in order to correct each malocclusion. The results were made.
1. Maxiniat orthodontic force of piston spring screw was about 400^(gm)x.
2. Decrease of force was rapid in initial few hours, but decrease of force was slower after few hours.
3. Reduction ratio of force during 6 hours was I%/hr. and it- was 1,5%/day after 6 hours.
4. As clinical application of the piston spring screw, orthodontic movement of individual tooth was satisfactory results.
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