A durable and wear-resistant joint spacer is provided. The joint spacer (15) has a Shore A hardness between 20 and 77, and has a tensile stress value of 20% to 60% at a unit weight, preferably more than 3.8N / mm2 at 50%, and preferably more than 4.6N. Greater than N / mm2, more preferably greater than 6 N / mm2, and / or a compressive stress value of 20% -60%, preferably greater than 50%, greater than 7.8 N / mm2, preferably greater than 9 N / mm2, especially Preferably greater than 10.5 N / mm2 and / or a Shore A hardness of tensile stress at unit weight of 20% to 60% up to 85, preferably 50%, greater than 6 N / mm2, preferably 7 N / mm2, particularly preferably more than 8 N / mm2, and / or a compressive stress value of 20% to 60% during linear compression is preferably more than 50%, more than 10.5 N / mm2, preferably 12 N / mm2. And particularly preferably more than 14 N / mm2. [Selection diagram] Fig. 1【課題】耐久性、耐摩耗性のある関節スペーサーを提供する。【解決手段】関節スペーサー１５は20～77間のショアＡ硬度を有し、単位重圧で引張応力値が20%～60%であり、好ましくは50%で3.8N/mm2を超え、好ましくは4.6N/mm2を超え、より好ましくは6N/mm2を超え、および/または圧縮応力値20%～60%、好ましくは50%を超え、7.8N/mm2を超え、好ましくは9N/mm2を超え、特に好ましくは10.5N/mm2を超え、および/または20%～60%での単位重圧で引張応力のショアＡ硬度が最大で85までであり、好ましくは50%、6N/mm2を超え、好ましくは7N/mm2を超え、特に好ましくは8N/mm2を超え、および/または線形圧縮時の20%～60%の圧縮応力値が好ましくは50%を超える、10.5N/mm2を超え、好ましくは12N/mm2を超え、特に好ましくは14N/mm2を超える。【選択図】図１
