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Cyclic fatigue properties of cobalt-chromium alloy clasps for partial removable dental prostheses.
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BACKGROUND
Cast cobalt-chromium (Co-Cr) alloy clasps have been widely used for prosthodontic treatment, but long-term retentiveness of these clasps is not clear.
OBJECTIVE
The purpose of this study was to investigate the residual retentive force of 3 types of cast Co-Cr alloy clasps in relation to
[Cyclic fatigue test of cobalt-chromium alloy cast clasps].
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OBJECTIVE
To investigate the change of retentive forces of cast cobalt-chromium (Co-Cr) alloy clasp in cyclic fatigue test.
METHODS
Samples of three types of cast Co-Cr alloy (Group A: Hardalloy; B: Regalloy™; C: Vera PDN™) clasps were fabricated and placed at undercut depths of 0.25 mm, 0.50 mm.
Effects of cobalt-chromium alloy surface casting on resistance to deflection fatigue and surface hardness of titanium.
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This study investigated the resistance to deflection fatigue and surface hardness of grade 2 titanium bar samples to a portion of which a layer of cobalt-chromium alloy was cast under standard dental laboratory conditions. The uncovered part of the titanium bar was deflected, and the number of
The fatigue life of a cobalt-chromium alloy after laser welding.
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The aim of this study was to investigate the fatigue life of laser welded joints in a commercially available cast cobalt-chromium alloy. Twenty rod shaped specimens (40 mm x 1.5 mm) were cast and sand blasted. Ten specimens were used as controls and the remaining ten were sectioned and repaired
Deflection fatigue of cobalt-chromium, titanium, and gold alloy cast denture clasp.
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The aim of this study was to determine the fatigue resistance of the cast clasps of removable partial dentures. The different commercial types of metals used included five cobalt-chromium alloys, pure titanium, one titanium alloy (Ti-6A1-4V) and one gold alloy (type IV) that was either unhardened or
Soldering and remelting influence on fatigue strength of cobalt-chromium alloys.
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BACKGROUND
For laboratory production, it would be economically advisable to reuse excess cobalt-chromium alloys in manufacturing partial denture frameworks. Furthermore, discrepancies in fit, modifications, repairs, and also economic factors could lead to soldering procedure on the metal
Ultrasonic fatigue of nickel-chromium alloys at low temperatures.
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The influence of low temperature ultrasonic deformation on the electrical resistivity and magnetic properties of nickel-chromium dilute solid solutions is examined. It is shown that changes in the electrical resistivity and magnetic properties of prequenched samples after ultrasonic fatigue can be
Duration of induction melting of cobalt-chromium alloy and its effect on resistance to deflection fatigue of cast denture clasps.
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This study determined the effect of various durations of induction melting of a cobalt-chromium alloy on resistance to deflection fatigue. Commercial cobalt-chromium alloy was melted by high-frequency induction for various lengths of time before it was cast into the shape of a denture clasp. The
Effect of water and artificial saliva on the low cycle fatigue resistance of cobalt-chromium dental alloy.
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BACKGROUND
Fatigue of denture clasp alloys causes clasp failures and decreases the retention of removable partial dentures. Little information is available on how the environment (dry, water, artificial saliva) effects the fatigue behavior of cast cobalt-chromium alloy clasps.
OBJECTIVE
This study
Respiration-induced kidney motion on cobalt-chromium stent fatigue resistance.
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During normal breathing, the kidneys move up and down due to the diaphragm motion and the renal artery subsequently experiences bending at or close to its point of fixation to the aorta. The impact of this kidney motion on implanted stent fatigue performance was not well understood in the past.
Effects of carbohydrate and chromium ingestion during intermittent high-intensity exercise to fatigue.
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OBJECTIVE
This study was designed to test the hypothesis that addition of chromium (Cr) to a carbohydrate-electrolyte drink would enhance the reported benefits of carbohydrate on exercise capacity during intermittent high-intensity shuttle running.
METHODS
Eight physically active men performed 3
Early fatigue failures of cemented, forged, cobalt-chromium femoral stems at the neck-shoulder junction.
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Femoral component fracture is a rare but well-documented complication after total hip arthroplasty. Historically, most stem fractures have occurred at the middle third of the implant, where proximal stem loosening and solid distal stem fixation result in cantilever bending and eventual fatigue
Fatigue fracture of a forged cobalt-chromium-molybdenum femoral component inserted with cement. A report of ten cases.
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Ten patients who had had a total hip replacement with a forged cobalt-chromium-molybdenum femoral prosthesis (Precoat or Precoat Plus) inserted with cement were seen with a fatigue fracture of the stem an average of fifty months (range, nineteen to seventy-four months) postoperatively. The average
Fatigue and life prediction for cobalt-chromium stents: A fracture mechanics analysis.
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To design against premature mechanical failure, most implant devices such as coronary and endovascular stents are assessed on the basis of survival, i.e., if a fatigue life of 10(8) cycles is required, testing is performed to ascertain whether the device will survive 10(8) cycles under accelerated
[Experimental study of the behavior of a chromium-cobalt alloy during fracture fatigue].
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