An experimental study on dynamic frictional resistance between brackets and archwires under the wet condition
- VernacularTitle:湿润状态下托槽与弓丝间动摩擦力的实验研究
- Author:
Hua XIANG
;
Jianyong WU
;
Qin LIU
- Publication Type:Journal Article
- Keywords:
Artificial saliva;
Dynamic frictional resistance;
Bracket;
Archwire
- From:
Journal of Practical Stomatology
2001;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the dynamic frictional resistance in the buccal segment between preadjusted brackets coupled with different archwires,at different times under artificial saliva condition.Methods: The dynamic friction of different combinations of 4 kinds of preadjusted brackets and 4 archwires were tested simulating archwires sliding in the buccal segments at 4 different times(0,15,30,45 d)under artificial saliva condition by using Instron universal testing machine.Results: The dynamic frictional resistance of combinations of 3M MBT bracket and all archwires were the smallest.The combinations of 0.46 mm inch stainless steel round wire and all brackets produced significantly lower dynamic frictional resistance than that of other archwires.The 0.48 mm?0.64 mm inch stainless steel rectangular wire produced the highest dynamic frictional resistance combined with all preadjusted brackets.The dynamic frictional resistance of combinations of archwires and brackets were highest at the 15th day and smallest at the 30th day under artificial saliva condition.Conclusion: 0.46 mm stainless steel round wire produces the smallest dynamic frictional resistance combined with all preadjusted brackets.3M MBT brackets are more favorable to sliding mechanics compared with other brackets.As for time,the lowest dynamic frictional resistance exhibits at the 30th day under artificial saliva condition.
