Effects of intraoral aging on surface properties of coated nickel-titanium archwires

被引:41
作者
Rongo, Roberto [1 ]
Ametrano, Gianluca [1 ]
Gloria, Antonio [2 ]
Spagnuolo, Gianrico [1 ]
Galeotti, Angela [3 ]
Paduano, Sergio [4 ]
Valletta, Rosa [1 ]
D'Anto, Vincenzo [1 ,5 ]
机构
[1] Univ Naples Federico II, Dept Neurosci Reprod Sci & Oral Sci, I-80131 Naples, Italy
[2] CNR, Inst Composite & Biomed Mat, Naples, Italy
[3] Bambino Gesu Pediat Hosp, Dept Pediat Surg, Div Dent, Rome, Italy
[4] Univ Catanzaro Magna Grecia, Sch Dent, Catanzaro, Italy
[5] Bambino Gesu Pediat Hosp, Dept Pediat Surg, Rome, Italy
关键词
Orthodontic archwire; Surface roughness; Surface treatment; Atomic force microscopy; Retrieved analysis; ATOMIC-FORCE MICROSCOPY; ORTHODONTIC ARCHWIRES; WIRES; RESISTANCE; ROUGHNESS; INSTRUMENTS; STABILITY; CORROSION;
D O I
10.2319/081213-593.1
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Objective: To evaluate the effects of intraoral aging on surface properties of esthetic and conventional nickel-titanium (NiTi) archwires. Materials and Methods: Five NiTi wires were considered for this study (Sentalloy, Sentalloy High Aesthetic, Superelastic Titanium Memory Wire, Esthetic Superelastic Titanium Memory Wire, and Ever White). For each type of wire, four samples were analyzed as received and after 1 month of clinical use by an atomic force microscope (AFM) and a scanning electronic microscope (SEM). To evaluate sliding resistance, two stainless steel plates with three metallic or three monocrystalline brackets, bonded in passive configuration, were manufactured; four as-received and retrieved samples for every wire were pulled five times at 5 mm/min for 1 minute by means of an Instron 5566, recording the greatest friction value (N). Data were analyzed by one-way analysis of variance and by Student's t-test. Results: After clinical use, surface roughness increased considerably. The SEM images showed homogeneity for the as-received control wires; however, after clinical use esthetic wires exhibited a heterogeneous surface with craters and bumps. The lowest levels of friction were observed with the as-received Superelastic Titanium Memory Wire on metallic brackets. When tested on ceramic brackets, all the wires exhibited an increase in friction (t-test; P < .05). Furthermore, all the wires, except Sentalloy, showed a statistically significant increase in friction between the as-received and retrieved groups (t-test; P < .05). Conclusion: Clinical use of the orthodontic wires increases their surface roughness and the level of friction.
引用
收藏
页码:665 / 672
页数:8
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