Comparison of the frictional characteristics of aesthetic orthodontic brackets measured using a modified in vitro technique / 대한치과교정학회지
The Korean Journal of Orthodontics
;
: 29-37, 2015.
Article
in English
| WPRIM
| ID: wpr-49754
ABSTRACT
OBJECTIVE:
The coefficients of friction (COFs) of aesthetic ceramic and stainless steel brackets used in conjunction with stainless steel archwires were investigated using a modified linear tribometer and special computer software, and the effects of the bracket slot size (0.018 inches [in] or 0.022 in) and materials (ceramic or metal) on the COF were determined.METHODS:
Four types of ceramic (one with a stainless steel slot) and one conventional stainless steel bracket were tested with two types of archwire sizes a 0.017 x 0.025-in wire in the 0.018-in slots and a 0.019 x 0.025-in wire in the 0.022-in slot brackets. For pairwise comparisons between the 0.018-in and 0.022-in slot sizes in the same bracket, an independent sample t-test was used. One-way and two-way analysis of variance (ANOVA) and Tukey's post-hoc test at the 95% confidence level (alpha = 0.05) were also used for statistical analyses.RESULTS:
There were significant differences between the 0.022-in and 0.018-in slot sizes for the same brand of bracket. ANOVA also showed that both slot size and bracket slot material had significant effects on COF values (p < 0.001). The ceramic bracket with a 0.022-in stainless steel slot showed the lowest mean COF (micro = 0.18), followed by the conventional stainless steel bracket with a 0.022-in slot (micro = 0.21). The monocrystalline alumina ceramic bracket with a 0.018-in slot had the highest COF (micro = 0.85).CONCLUSIONS:
Brackets with stainless steel slots exhibit lower COFs than ceramic slot brackets. All brackets show lower COFs as the slot size increases.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Stainless Steel
/
Ceramics
/
Orthodontic Brackets
/
Friction
/
Aluminum Oxide
Language:
English
Journal:
The Korean Journal of Orthodontics
Year:
2015
Type:
Article
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