دوره 10، شماره 3 - ( 6-1404 )
جلد 10 شماره 3 صفحات 183-176 |
برگشت به فهرست نسخه ها
چکیده: (641 مشاهده)
Background and Aim: This in vitro study aimed to evaluate the static and kinetic frictional forces of domestically produced Emerald™ brackets during sliding mechanics and compare them with Mini Master™ brackets, a well-recognized alternative, to determine their viability as a cost-effective and reliable option.
Materials and Methods: For sample selection, 100 brackets from each manufacturer (200 in total) were screened under a light microscope, and then 34 Emerald™ and 34 Mini Master™ brackets were randomly selected. Additionally, 68 rectangular stainless-steel archwires (0.019” ×0.025”) were selected after eligibility assessment. Brackets were mounted on plastic blocks using cyanoacrylate adhesive, and archwires were secured in the bracket slots with elastic ligatures. Friction was measured using a universal testing machine (500-N load cell), with 5 mm/min speed over a 5 mm distance. The Shapiro-Wilk test assessed normality, and the Mann-Whitney U test compared friction between the groups (α = 0.05).
Results: No statistically significant difference was found between the mean kinetic frictional forces of Emerald™ (1.80±0.57 N) and Mini Master™ brackets (1.90±0.29 N) (P=0.342). However, Emerald™ brackets demonstrated significantly lower mean static frictional forces (2.14±0.76 N) compared to Mini Master™ group (2.44±0.41 N) (P=0.045). Additionally, Emerald™ brackets showed greater variability in friction values, with a wider range between minimum and maximum forces than the Mini Master™ group.
Conclusion: The results suggest that Emerald™ brackets may provide a low-friction advantage, but their variable friction values require further research to evaluate clinical implications.
Materials and Methods: For sample selection, 100 brackets from each manufacturer (200 in total) were screened under a light microscope, and then 34 Emerald™ and 34 Mini Master™ brackets were randomly selected. Additionally, 68 rectangular stainless-steel archwires (0.019” ×0.025”) were selected after eligibility assessment. Brackets were mounted on plastic blocks using cyanoacrylate adhesive, and archwires were secured in the bracket slots with elastic ligatures. Friction was measured using a universal testing machine (500-N load cell), with 5 mm/min speed over a 5 mm distance. The Shapiro-Wilk test assessed normality, and the Mann-Whitney U test compared friction between the groups (α = 0.05).
Results: No statistically significant difference was found between the mean kinetic frictional forces of Emerald™ (1.80±0.57 N) and Mini Master™ brackets (1.90±0.29 N) (P=0.342). However, Emerald™ brackets demonstrated significantly lower mean static frictional forces (2.14±0.76 N) compared to Mini Master™ group (2.44±0.41 N) (P=0.045). Additionally, Emerald™ brackets showed greater variability in friction values, with a wider range between minimum and maximum forces than the Mini Master™ group.
Conclusion: The results suggest that Emerald™ brackets may provide a low-friction advantage, but their variable friction values require further research to evaluate clinical implications.
نوع مطالعه: Original article |
موضوع مقاله:
orthodontic
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