TY  - JOUR
TI  - Long-term durability of alumina ceramic heads in THA
Y1  - 2015///
SN  - 1471-2474
AV  - public
VL  - 16
JF  - BMC musculoskeletal disorders
ID  - heidok19443
SP  - 1
N2  - Background: The optimal type of bearing for hip arthroplasty remains a matter of debate. Ceramic-on-polyethylene (CoP) bearings are frequently used in younger and more active patients to reduce wear and increase biocompatibility compared to Metal-on-Polyethylene (MoP) bearings. However, in comparison to metal heads, the fracture risk of ceramic heads is higher. In addition, ceramic head fractures pose a serious complication which often necessitates major revision surgery. To date, there are no long-term data (>20 years of follow-up) reporting fracture rates of the ceramic femoral heads in CoP bearings. The purpose of this research was to investigate long-term CoP fracture rate.   Methods: We evaluated the clinical and radiographic results of 348 cementless THAs treated with 2nd generation Biolox® Al2O3 Ceramic-on-Polyethylene (CoP) bearings consecutively implanted between January 1985 and December 1989. The mean age at implantation was 57 years. The patients were followed for a minimum of 20 years. At the final 111 had died, and 5 were lost to follow-up. The cumulative incidence of ceramic head fractures in the long-term was estimated using a competing risk analysis.   Results: The cumulative incidence of ceramic head fracture after 22-years was estimated with a competing risk analysis at 0.29% after 22-years (SE?=?2.09%; 95% - CI: 0.03-1.5%). The radiographic analysis revealed no impending failures at final follow-up.   Discussion/Conclusion: The fracture rate of second-generation ceramic heads using a CoP articulation remains very low into the third decade after cementless THA.  
EP  - 7
PB  - BioMed Central
IS  - 249
CY  - London
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/19443/
A1  - Beckmann, Nicholas A.
A1  - Gotterbarm, Tobias
A1  - Innmann, Moritz M.
A1  - Merle, Christian
A1  - Bruckner, Thomas
A1  - Kretzer, Jan Philippe
A1  - Streit, Marcus R.
ER  -