| 摘要 |
<p>An implant for insertion between two regions of tissue includes a base having a first contact surface for contacting a first region of tissue, the base comprising a first portion displaceable relative to a second portion, the base assuming an initial length and being adjustable towards a second length when the first portion is displaced relative to the second portion. The implant further includes a displaceable element having a second contact surface for contacting a second region of tissue. A mechanical linking arrangement links between the displaceable element and each of the first and second portions of the base such that relative displacement of the first and second portions causes displacement and/or rotation of the second contact surface relative to the first contact surface. The first portion and the second portion are formed with complementary features defining a ratchet configuration comprising a series of ratchet teeth and a resiliently biased detent, the ratchet configuration being deployed to allow shortening of the base from the initial length through a range of lengths, and to oppose lengthening of the base. The ratchet is preferably releasable by selective motion of a deployment rod inserted via an opening in a proximal end of the implant, thereby facilitating redeployment or removal of the implant.</p> |
