| Summary: | 碩士 === 臺北醫學大學 === 牙醫學系碩博士班 === 101 === The traditional orthodontic power chain, usually made of polymer materials, exists some drawbacks as the followings that reduce of elasticity due to swell after absorbing water and surface discoloration resulted from the patient''s diet, food or beverage colors leading to poor appearance. The main purpose of this study was to develop surface modification on orthodontic power chain and to realize the properties change for improvement of its shortcomings.
In this pilot study, a template produced by pure aluminum piece with anodized production (concave) through the nanoimprint process fabricating nanostructures (convex) on the surface of power chain, resulting in surface modification of power chain. The different nanoimprint process parameters (e.g. nano-imprinting temperature, nano-imprinting pressure, nano-imprinting time and de-molding temperature) are used to produce nano-structures on the surface of power chain. This research will analyze and discuss the change of the power chain properties (e.g. surface properties, water absorption, distortion, and color stain, SEM observation) between before and after the surface modification.
The results of this study show that the contact angle of the power chain became larger after nano-imprinting surface treatment. The hydrophilic properties of power chain have been turn into hydrophobic properties. Unmodified power chain before water absorption is about 4%, while a modified water-absorbent about 2-4%. The distortion degree of modified power chain is increase with the nano-imprinting temporary . Modified power chain color adhesions are also less than the modification before.
In summary, power chain has very different surface properties after surface modification. This study will continue to explore the power chain modified front and rear of the cell culture and animal experiments. The further clinical studies and application will be performed in the future.
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