大腿骨遠位部腫瘍用人工膝関節再置換例におけるステム折損の要因と固定方法の検討

Key Points

• This research investigates the causes of stem failure in tumor knee prostheses and compares replacement and non-replacement cases.
• Examined 15 cases of tumor knee prosthesis replacement for stem failures.
• Compared replacement group with non-replacement group regarding stem design and failure rates.
• Analyzed failure frequency and anatomical implications associated with different stem types.
• All observed stem failures occurred with the side plate-type slender stem, particularly near the distal non-perforating holes.
• No failures or looseness were reported in the non-replacement group using cementless tapered stems over a period of less than 10 years.
• Larger diameter stems are ideal for long-term durability, but anatomical constraints often limit their use in younger patients.