The purpose of this study was fourfold - to evaluate the general laws of friction applied to orthodontic conditions, to compare archwire materials under these controlled conditions, to compare ligation method, and to measure the effect of the artificial saliva on friction with these materials
Three wire alloys (Cobalt-chromium, Nickel-titanium, Beta-titanium) in two size wires (.016" , .016" x.022" ) were examined respect to the bracket (.018" x.025" standard), and two ligature material (stainless steel, elastomeric) in dry and wet conditions
The results were as follows,
1. The order of frictional force against alloy materials was Co-Cr (lowest), Ni-Ti, and i9 -Ti(highest) - with the exception of elastomeric ligation under wet conditions.
2. S.S. ligation gave r se to significantly greater friction than elastomeric ligation did.
3. Testing in the presence of saliva, rather than in dry conditions, decreased the frictional force for S.S. ligation with
.016" Co-Cr, Ni-Ti_ 8 -Ti. but, increased the frictional force for S.S. ligation with .016" X .022" Co-Cr, Ni-Ti, /
-Ti.
4. .016" X.022 " wire generated more friction than .016" wire.
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