Comparison of friction force between Lock-loose bracket and traditional bracket
10.7518/hxkq.2014.06.009
- VernacularTitle:Lock-loose托槽与传统托槽摩擦力特性的比较研究
- Author:
Xiaowei LIU
1
;
Luyi YANG
;
Huifang ZHU
;
Yan DONG
;
Qi WANG
;
Wei JIANG
;
Yanran WU
Author Information
1. 吉林大学口腔医院正畸科
- Keywords:
Lock-loose bracket;
friction;
artificial saliva;
orthodontic
- From:
West China Journal of Stomatology
2014;(6):570-574
- CountryChina
- Language:Chinese
-
Abstract:
Objective ??Frictions?of?Lock-loose?brackets?with?ligated?main?wings?or?all?six?wings?were?measured?as?they?slid?along?archwires?in?dry?and?artificial?saliva?environments.?The?Lock-loose?brackets?were?then?compared?with?traditional?brackets?and?self-ligating?brackets. Methods ??The?surface?states?of?the?stainless?steel?archwires?were?observed?with?atomic?force?microscopy?before?and?after?mechanical?traction.?The?Lock-loose?brackets,?traditional?brackets,?and?self-ligating?brackets?used?in?this?study?were?composed?of?0.406?4?and?0.457?2?mm?stainless?steel?round?archwires?and?0.457?2?mm×0.634?9?mm?and?0.482?6?mm×0.634?9?mm?stainless?steel?rectangular?archwires.?Two?different?ligating?methods?were?applied?to?the?Lock-loose?brackets,?i.e.,?main?wings?ligated?and?all?six?wings?ligated.?Frictions?were?measured?by?using?an?electronic?universal?testing?machine.?Results ??No?significant?differences?were?found?between?the?roughness?of?different?archwires?before?and?after?mechanical?traction?in?different?brackets?(P>0.05).?When?the?main?wings?of?the?Lock-loose?brackets?were?ligated,?the?frictions?of?the?four?different?stainless?steel?archwires?were?close?to?zero,?and?the?difference?with?frictions?of?traditional?brackets?was?significant?(P<0.05).?When?using?0.457?2?mm×0.634?9?mm?rectangular?archwires,?maximum?friction?(P<0.05;?significantly?different?from?those?of?other?brackets)?was?reached?when?all?six?wings?of?the?Lock-loose?brackets?were?ligated.?Frictions?in?the?dry?state?were?higher?than?those?in?the?wet?state?(P<0.05).?Conclusion ??The?Lock-loose?brackets?can?adjust?the?friction?efficiently?with?different?ligating?methods,?thus?solving?the?problem?of?low?friction?and?strengthening?anchorage.
