The joint of the vertebral body prosthetic device of this invention Kaminoseki section conjugation papilla and the Shimonoseki section conjugation papilla of the joint of the vertebral body includes the Ozeki nodal surface element of pair in order to engage. The above-mentioned Ozeki nodal surface element one for glenoid junction motion at those time or has the glenoid composition plane above that. As for the above-mentioned Ozeki nodal surface element, in addition, separation of the element is prevented, and/or, relative motion at those time is restricted inside the specified range, it has the secure engagement element. With one feature, as for this invention, it registers between the above-mentioned Ozeki nodal surface element, furthermore it has the spacer which makes the joint of the vertebral body elude. The above-mentioned spacer, the lump outside artificial, between the Kaminoseki section composition plane, and the Shimonoseki section composition plane forms function can do. As for the above-mentioned spacer, the Ozeki nodal surface element on the one hand, or, engagement means in order to engage both securely can be offered.< Choice figure >Drawing 3本発明の椎間関節プロテーゼは、椎間関節の上関節接合突起及び下関節接合突起と係合するための一対の小関節面要素を含む。上記小関節面要素は、それらの間の関節接合運動のための1つ又はそれ以上の関節接合面を備える。上記小関節面要素は、また、要素の分離を防止し、及び/又は、それらの間の相対運動を所定の範囲内に制限する、確実な係合要素を備える。一態様では、本発明は、上記小関節面要素間の位置決めをし、椎間関節を逸らさせるスペーサーをさらに備える。上記スペーサーは、上関節接合面、及び、下関節接合面の間の人工的な外側塊を形成し、機能し得る。上記スペーサーは、小関節面要素の一方、又は、両方を確実に係合するための係合手段が提供され得る。【選択図】図3
