OBJECTIVE To analyze the fatigue resistance, debonding force, and failure type of fiber-reinforced composite, polyethylene ribbon-reinforced, and braided stainless steel wire lingual retainers in vitro. METHODS Roots of human mandibular central incisors were covered with silicone, mimicking the periodontal ligament, and embedded in polymethylmethacrylate. The specimens (N = 50), with two teet...

One of the main disadvantages steel bars is rebar corrosion, especially when they are exposed to aggressive environmental conditions such as marine environments. suggested ways solve this problem use composite bars. However, these ambiguous due some weaknesses, low modulus elasticity and linear behavior in tensile tests. In research, effect hybridization process on mechanical behavior, includin...

In this work, the effects of loading condition and corrosion solution on the corrosion fatigue behavior of smooth steel wire were discussed. The results of polarization curves and weight loss curves showed that the corrosion of steel wire in acid solution was more severe than that in neutral and alkaline solutions. With the extension of immersion time in acid solution, the cathodic reaction of ...

OBJECTIVE Using the Hörmann technique of hyoid suspension in sleep apnea surgery, a steel wire is placed through the thyroid cartilage and slung around the hyoid bone. However, we experienced thyroid cartilage fracture by steel wire traction. A modification is presented to avoid thyroid cartilage fracture. STUDY DESIGN Case series with chart review. SETTING University hospital. SUBJECTS A...