인공타액하에서 교정선과 Bracket간의 마찰력에 대한 연구

고  정  석

전남대학교 대학원 치의학과

(지도교수 : 양규호)

(Abstract)

It has been suggested that the frictional force between bracket and arch wire may impede the tooth movement, The present study was aimed to compare and analyze the effect of wire size, type of ligation, and duration of ligation on the magnitude of frictional force between cobalt chromium wire and stainless steel bracket under the artificial saliva.

The results were as follows:

1. Type of ligation and size of wire were the main influencing factor on the level of        friction.

2. Stainless steel ligature generated higher frictional forces than elastomeric module.

3. The rectangular wire consistently exhibited more frictional force values than round   wires, while there was no significant difference between frictional forces of round    wires.

4.  In elastic ligature frictional force decreased with time.

5. Artificial saliva had no significant influence on the frictional force between cobalt        chromium wire and bracket.