Conversion Athrodesis to TKA Kreder et. al: 18 knees 28% failure (infection, component failure) Cameron and Hu: 17 knees 53% failure (tibial component loosening, ligamentous laxity, quad rupture, wound breakdown, repeat athrodesis) Kim et. al: 30 knees 53% failure; mean flexion 75 deg, 9 deg extension deficit Henkel et. al: 7 knees 29% failure; 71% re- operation; most with increased pain on walking Warner: Three phase “Judet quadricepsplasty” to mobilize extensor mechanism.
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