| 摘要 |
An orthopaedic base component and an augmentation block, such as a provisional tibial component 2, which includes an attachment mechanism that ensures that the augmentation block 30 can not inadvertently shift about or disconnect from the tray component 10. The attachment mechanism uses a button 40 and "key hole" shaped opening 20 to attach augmentation block 30 to tray component 10. The "key hole" opening is formed in the distal surface 14 of tray component 10. The "key hole" configuration is formed by an elongated slot 21 and a circular bore 23. Two oppositely facing protuberances 26 extend into the posterior end of each slot 21 from the peripheral side walls 22, which define the slot. Button 40 extends transversely from the proximal surface 34 of the augmentation block 30 and includes a substantially rectangular neck 42 and a flat circular head 44. Neck 42 has an indentation 43 formed on two opposed sides. Button 40 is securely held at the posterior end of slot 21 by protuberances 26, which are restrictively seated within the 43 in neck 42.
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