| 摘要 |
The invention concerns an osteosynthesis system for vertebra arthrodesis comprising: at least a vertebra distraction or compression bar (1) extending at least over part of the backbone; at least a vertebra anchoring member (2), comprising a top end (4) with spherical surface (5) an intermediate rod (6) and a vertebra anchoring portion (7); and associated with each anchoring member, a common support (10), for receiving, coupling and locking said vertebra anchoring member and said bar, said common support comprising a first concave housing (15) receiving the bar (1), a second concave housing (20) receiving said spherical top (4), and threaded means (9, 23) locking the bar and the anchoring member on the support, said locking means comprising at least a nut (9) to be screwed on a support threaded portion (11, 12). The invention is characterised in that the first housing (15) is located outside the support threaded portion (11, 12) and is open sideways and upwards, opposite the backbone, so that the bar (1) is blocked by a peripheral part of the nut (9).
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