| Autor: |
Vasu Murthy Sesham, Jaitly, Anupriya, Chigurupati, Lalitha, Neela, Praveen Kumar, Mamillapalli, Pavan Kumar, Peddu, Revathi |
| Předmět: |
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| Zdroj: |
Journal of Dr. NTR University of Health Sciences; Oct-Dec2015, Vol. 4 Issue 4, p246-252, 7p |
| Abstrakt: |
Background: Friction plays a very crucial role in our daily life and orthodontics is no exception. Various materials possess friction of varying intensity, which ultimately affects tooth movement. Aim: The aim was to compare the frictional resistance (FR) between various bracket types and archwire materials when ligated with low-friction and conventional elastic ligatures so as to obtain best bracket'archwire combination possessing least FR for clinicians in achieving optimal mechanotherapy. Materials and Methods: Study consisted of three types of preadjusted edgewise brackets including ceramic, stainless steel (SS) and self-ligating brackets (0.022' slot, MBT prescription), two types of archwire materials, 0.019 ' 0.025' SS and 0.019 x 0.025' Tefl on coated (TC) and two types of ligatures including low-friction and conventional elastic ligature. A total of 10 combinations were formed with the above mentioned material. Each combination was tested 10 times on universal testing machine for FR. The data was statistically analyzed using one-way ANOVA and unpaired t-tests. Results: Self-ligating brackets exhibited least FR (2.35 ' 0.15N) followed by metal brackets. Ceramic brackets showed the highest FR (7.32 ' 0.10N). In general, the mean value for TC wire was less than that of SS wire indicating low FR possessed by TC wires. Results also showed that low-friction ligatures produce lower-friction when compared with conventional elastic module (P < 0.05). Conclusion: The study demonstrated that self-ligating brackets with TC wire showed the least FR and ceramic brackets with SS wire when ligated with conventional elastic ligature showed the highest FR.. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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