| 摘要 |
<p>Disclosed is an implant that reduces excess mechanical stress that accrues to spinous processes by insertion of an inter-spinous process implant, thereby potentially extending the amount of time wherein the benefits of the implant insertion may be realized. The inter-spinous implant comprises an approximately conical screw portion, further comprising a screw thread, which can be screwed between spinous processes; a head portion of an approximate inverted frustum shape of the same axis as the screw portion; a spacer portion that is formed between the screw portion and the head portion in the axial direction; and a through hole that passes through the axial center of the screw portion, the spacer portion, and the head portion. At least one slit or depression is formed in the major axial direction of the total shape of the implant, having at least one-third the length of the total length of the major axial direction, the depth whereof reaching the through hole. Disposing the slit or depression in the major axial direction of the implant proper imparts flexibility and elasticity to the implant overall, simplifies the installation and insertion of the implant, and allows the benefit of widening the space between the spinous processes to be sustained for extended time periods without putting excessive stress on the spinous processes that make contact with the implant.</p> |
