| Autor: |
Rathod, H. Raju, Peddu, Revathi, Bandaru, Shyam kumar, Adusumilli, Sai Prakash, Mallavarapu, Kalyani, Chakravarthy, C. H. Nareen |
| Předmět: |
|
| Zdroj: |
Indian Journal of Dental Sciences; Dec2012, Vol. 4 Issue 5, p34-39, 6p |
| Abstrakt: |
Aim: The objective of the present study was to evaluate in vitro, the influence of different ligatures, archwire material and archwire sizes on static frictional resistance. Methods: The frictional resistance was evaluated by using different ligatures Gray, Purple, Alastic, Teflon coated stainless steel ligature and 0.009"Stainless steel ligatures on 0.017"×0.025" and 0.019"×0.025" TMAand SS archwires using standard edgewise brackets with zero degree tip and torque mounted on Perspex blocks using an universal testing machine with a cross head speed of 5mm/min with unstimulated saliva as a lubricant. Results: Mean and SD values were calculated. Data was statistically analyzed using three way analysis of variance (ANOVA), pair wise comparison by Tukeys multiple post hoc test and multiple regression analysis to calculate coefficient of static friction. The results showed that irrespective of wire size and wire material combination Teflon coated SS ligatures produced the least frictional resistance while Gray elastomeric modules produced the highest with Alastic, SS ligature and purple falling in between. Multiple linear regression analysis of static friction revealed that only arch wire size has significant influence on static friction with groups and archwire composition showing negligible influence. Interpretation and conclusion: (a)Teflon coated stainless steel ligatures produced lowest frictional forces with all wire, material contributions followed by Alastic, Stainless steel, Purple and gray elastomeric modules. (b)Increase in arch wire dimension has increased the frictional resistance, whereas archwire composition has minimal effect on frictional resistance. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
