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_Abrasion resistance:Oxinium implants are dramatically more abrasion-resistant than cobaltchrome implants.-Hardness :surface hardness is correlated with abrasion resistance as well as properties such asstrength and stiffness .The higher surface hardness of Oxinium component , coupled with astrong bending between the surface ceramic oxide and the metal substrate help explain thesuperior abrasion resistance of this material as compared to cobalt chrome.Damage tolerance : Damage to the surface of femoral component is always a risk .The damagetolerance to Oxinium was investigated by two standard tests(crater and groove tests).The resultsupports the premise that even under extreme conditions catastrophic failure will not result.Fatigue strength :The Oxinium component were found to support a minimum fatigue load of1.000lbs for 10 million cycles which is equivalent to a cobalt chrome femoral component of thesame design.Metal allergies and biocompatibility: Between 3_8% of population has been estimated to havemetal allergies .Many of these people need a total joint replacement .But many not becandidates because of metal sensibility. The maximum nickel content for cobalt chrome can beas high as 1% compared to for Oxinium.Oxinium material advantage:1_ 4900 times more resistant to abrasion than cobalt chrome for superior durability over time.2_ 160 times smoother than cobalt chrome.3_97.5% Zirconium and 2.5% Niobium two of the most biocompatible metals known thisallows for a 5-micron thick ceramic surface for enhanced bearing properties, maintaining ametal core to retain strength.4_More than twice as hard as cobalt chrome, which directly with an increase in resistance toscratching.5_Has less than traditional femoral heads (cobalt chrome) due to a unique process where thesurface of Zirconium metal alley is transformed into Oxinium by a process that allows Oxygento absorb into the alley .The process changes only the surface from a metal to a smooth ceramic.The rest of implant remains metal to maintain its overall strength.6_ Has a friction rate half of cobalt chrome which results in a dramatic decrease in wear .Theceramic surface reduces friction between the implant device and the polyethylene component ornative cartilage ,meaning less potential for wear and a device that should last longer.Oxinium clinical advantage:Three types of patient have been indentified as the best candidates for an Oxinium total jointarthroplasty.1_Suitable younger patient(under 60 year) due to Oxinium,s strength and longevity propertiesthrough less wear and tear.2_Active patients: patients, who desire to return to an active life style, including sport, dancing,gardening or other strenuous activities.3_Metal allergy patients :Because Oxinium Contain no detectable nickel,is one of the mostfile:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]