MoM bearing surfaces were postulated at that time to decrease the risk of aseptic loosening related to wear and therefore to increase implant survivorship compared to conventional metal or ceramic on polyethylene bearings. Large head metal-on-metal (MoM) total hip arthroplasty (THA) regained popularity in the last decade of the twentieth century after the introduction of modern resurfacing hip arthroplasty (RHA). This result emphasizes the role of fretting corrosion at the head-neck junction (i.e., trunnionosis) with significantly higher ion levels and Co/Cr ratio dissociation in THA. Failure rate due to ARMD was significantly higher in THA while no significant difference in other causes of failure was observed between the two groups. RHA survivorship was significantly higher at any time point. Survivorship was significantly lower in THA compared to RHA at ten years and 15 years. Ion levels and Co/Cr ratio were both significantly higher in THA ( p < 0.01). ![]() No significant difference was detected in failure rate due to other causes between the two groups ( p = 0.2–0.9). The rate of ARMD was significantly higher in THA (OR = 2.9 p = 0.02). Survivorship was compared according to the cause of failure with revision as the endpoint. Chromium (Cr) and cobalt (Co) ion levels and Co/Cr ratio were compared. Causes of failure were reported as MoM specific (i.e., adverse reaction to metal debris (ARMD) and painful hip with ion elevation) or MoM non-specific (i.e., fracture, infection, and dislocation). Methodsįour hundred twenty-seven MoM hip arthroplasties (286 THA and 141 RHA) were retrospectively analyzed at a mean follow-up of 13 ± three years. This study aimed to identify and compare the cause of failure and survivorship of MoM RHA and THA at a minimum ten year follow-up. ![]() Radio communications during the September 11 attacks - This article reviews some of the details of radio communications at the SeptemWorld Trade Center attacks.Comparison of mid- to long-term cause of failure and survivorship of metal-on-metal (MoM) resurfacing hip arthroplasty (RHA) and large head total hip arthroplasty (THA) remains sparse. Nobel Prizes - ▪ 2009 Introduction Prize for Peace The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… … Universalium Auxiliary cruiser Kormoran meets a German U boat at sea Career (Nazi Germany) … Wikipedia For other uses, see Kormoran (disambiguation). German auxiliary cruiser Kormoran - Kormoran redirects here. Hell Is for Heroes (band) - Infobox musical artist Name = Hell is for Heroes Img capt = Img size = Landscape = yes Background = group or band Alias = Origin = flagicon|England Camden, London, England Genre = Post Hardcore Years active = 2000 Present Label = Burning Heart… … Wikipedia Morse code - Chart of the Morse code letters and numerals Morse code is a method of transmitting textual information as a series of on off tones, lights, or clicks that can … Wikipedia Voice modems are used for telephony and answering… … Wikipedia ![]() Voice modem command set - Main article: Modem Voice modem is a term commonly used to describe an analog telephone data modem with a built in capability of transmitting and receiving voice recordings over the phone line. RCTV - Infobox Network network name = Radio Caracas Televisión Internacional name = network network type = Cable television network Defunct broadcast television network branding = RCTV Internacional airdate = Novem(as an over the air… … Wikipedia 1910 birth date = 3 March 1847 birth place = Edinburgh, Scotland, UK death date = death date and age|1922|8|2|1847|3|3|df=y death place … Wikipedia Transmit Failure - Infobox Album | Name = Transmit Failure Type = album Artist = Four Hundred Years Released = 1998 Genre = Emo Length = Label = Lovitt Records Producer = Reviews = AllMusic rating|4|5 … … Wikipedia
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