Comparison of the frictional characteristics of aesthetic orthodontic brackets measured using a modified in vitro technique
KOREAN JOURNAL OF ORTHODONTICS, cilt.45, sa.1, ss.29-37, 2015 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 45 Sayı: 1
- Basım Tarihi: 2015
- Doi Numarası: 10.4041/kjod.2015.45.1.29
- Dergi Adı: KOREAN JOURNAL OF ORTHODONTICS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.29-37
- Anahtar Kelimeler: Brackets, Archwires, Coefficient of friction, Tribometer, INSERT CERAMIC BRACKETS, SELF-LIGATING BRACKETS, STAINLESS-STEEL, ARCHWIRE COMBINATIONS, WIRE COMBINATIONS, RESISTANCE, COEFFICIENTS, LIGATURES, BEHAVIOR, FORCES
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Ondokuz Mayıs Üniversitesi Adresli: Evet
Özet
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 (mu = 0.18), followed by the conventional stainless steel bracket with a 0.022-in slot (mu = 0.21). The monocrystalline alumina ceramic bracket with a 0.018-in slot had the highest COF (mu = 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.