PROBLEM TO BE SOLVED: To provide a medical implant assembly having at least a first bone mounting structure and a second bone mounting structure exhibiting an adequate fatigue strength to provide stabilization and protected motion of a spine, without fusion and cooperating with extended longitudinal connecting members.SOLUTION: The medical implant assembly is characterized in such that the connecting member 1 includes at least one transition portion 8 at least partially disposed between the first bone attachment structure and the second bone attachment structure, the transition portion 8 has a rigid segment 6 attached to the first bone attachment structure and an elastomer member 7 fixed to the end of the rigid segment 6 with each other, the elastomer member 7 cooperates with the second bone attachment structure so as to provide motion between the elastomer member 7 and the second bone attachment structure, and the connecting member 1 has an outer sleeve that can be compressed for engaging with the transition portion 8 and the outer sleeve is positioned between the first bone attachment structure and the second bone attachment structure and provides a support surrounding the elastomer member 7.【課題】十分な疲労強度を呈して、連合を伴わずに脊椎の安定で防御された動きを提供する、延設縦長接続部材と協働する少なくとも第１骨取付け構造および第２骨取付け構造を有する医療用インプラントアセンブリを提供する。【解決手段】接続部材１は、第１骨取付け構造と第２骨取付け構造との間に少なくとも部分的に配設される遷移部８を備え、遷移部８は、第１骨取付け構造に取り付けられる硬質な部分６と、硬質な部分６に端部どうしで固定されるエラストマー部材７と、を有し、エラストマー部材７は、エラストマー部材７と第２骨取付け構造との間の運動を提供するように第２骨取付け構造と協働し、接続部材１は、遷移部８に係合する圧縮可能な外側スリーブを有し、外側スリーブは、第１骨取付け構造と前記第２骨取付け構造との間に位置決めされ、ラストマー部材７を囲う支持を提供する、医療用インプラントアセンブリ。【選択図】図１
