公开(公告)号：US5536271A

公开(公告)日：1996-07-16

申请号：US252885

申请日：1994-06-02

申请人： Anne M. Daly ,  Timothy J. Blackwell ,  Troy D. Martin

发明人： Anne M. Daly ,  Timothy J. Blackwell ,  Troy D. Martin

IPC分类号： A61B17/16 ,  A61B17/17 ,  A61B17/56

CPC分类号： A61B17/1677 ,  A61B17/1767 ,  A61B2017/1602

摘要： A system is disclosed for preparing a natural patella for implantation of a patellar prosthesis. Substantially the same amount of bone removed from the natural patella is replaced by the prosthesis so that the reconstructed patella will replicate the natural one in diameter and thickness. To this end, the patella is held stationary and two operations are performed simultaneously. First, a posterior side of the patella is resected to form a prosthesis receiving surface for reception of a fixation surface of the patellar prosthesis. Second, a mounting bore is formed into the resected surface of the patella for reception of fixation members of the patellar prosthesis. A reamer is guided for movement between a first position spaced from the posterior surface of the patella and a second position in operative engagement with the patella at which formation of both the receiving surface and of the mounting bore therein has been completed. The reamer is stopped at the second position which is preselected according to the thickness of the patella such that the amount of the patella removed is substantially equal to the thickness of the patellar prosthesis.

摘要翻译： 公开了一种用于制备用于植入髌骨假体的天然髌骨的系统。 基本上从天然髌骨移除的骨量相同，由假体代替，使得重建的髌骨将复制直径和厚度的天然髌骨。 为此，髌骨保持静止，同时进行两次手术。 首先，切除髌骨的后侧以形成用于接收髌骨假体的固定表面的假体接收表面。 其次，安装孔形成在髌骨的切除表面中，用于接收髌骨假体的固定构件。 导向器用于在与髌骨的后表面间隔开的第一位置和与髌骨有效接合的第二位置之间移动，在该髌骨处，接收表面和其中的安装孔的形成已经完成。 铰刀被停止在根据髌骨厚度预选的第二位置，使得髌骨的移除量基本上等于髌骨假体的厚度。