Medicrea Technologies

Other

Bernard Villaret

Jean Taylor

Jean-Luc Clement

Yves Adam

Vincent Fiere

Patrizio Parisini

Vertebral osteosynthesis equipment includes bony anchoring members, such as pedicular screws or hooks, at least one of which includes a proximal threaded stud for receiving a nut and a base portion for anchoring to a vertebra; linking rods, intended to be connected to these anchoring members and attached to the vertebrae by these anchoring members, parts for connecting these linking rods to the anchoring members, and extension pieces for engaging on the proximal stud(s) of the anchoring member(s) for running down connecting parts on this or these proximal stud(s) until they rest on the proximal zone(s) of the base portion(s) of the anchoring members. The proximal stud of at least one anchoring member and the extension piece intended to be used with this anchoring member include positioning elements for positioning the extension piece on the free end of the proximal stud, concentrically thereto.

Vertebral osteosynthesis equipment

Equipment includes bony anchoring members one or two linking rods, intended to be connected to the anchoring members, and parts for connecting the linking rod(s) to the anchoring members, at least one anchoring member including a proximal threaded stud and a clamping element for assembling a connecting part thereon, the connecting part including a clamping element for immobilizing the linking rod with respect thereto. The connecting part includes a rounded section for hugging a linking rod and two parallel branches having holes enabling engagement on the proximal threaded stud of the anchoring member; and the clamping elements may be engaged coaxially on the proximal threaded stud of the anchoring member, a first clamping element enabling the assembly of the connecting part on this proximal threaded stud and the second clamping element enabling to clamp both branches of this connecting part.

A vertebral osteosynthesis device includes at least two bone anchoring elements () in the vertebral bone structures respectively (S, L), a longitudinal linking member () between the bone anchoring elements, and connector links () between the bone anchoring elements and said linking members. Each bone anchoring element includes a bond fixing part (), a head () to be gripped by a screwing device, a threaded shaft () extending the grip head, and a clamping element () to be screwed on said shaft to lock together the connector link, the longitudinal linking member and the corresponding bone anchoring element; the threaded shaft () is provided at its end with a hinge ball joint () in a housing () of the grip head (), enabling a multidirectional adjustment of the shaft () and a positioning of the connector link () adapted to the vertebral segment configuration (S, L, . . . Lw) receiving the bone anchoring elements.

Multidirectional adaptable vertebral osteosyntsis device with reduced space requirement

This equipment includes: The stud of at least one anchoring member and the extension piece used therewith include positioning elements.

Equipment includes bony anchoring members, one or two linking rods, intended to be connected to these anchoring members, and parts for connecting the rod(s) to the anchoring members; at least one anchoring member includes a proximal stud articulated with respect to a base portion enabling bony anchoring; clamping elements enable assembly of the connecting part on the anchoring member. The proximal stud includes a surface forming an axial stop, against which the connecting part is intended to rest, and the clamping elements clamp this connecting part against this surface which is positioned so that the connecting part, when clamped there against, is not clamped against the base portion so that there remains, after clamping, a possibility of articulated backlash of the proximal stud with respect to the base portion.

The invention concerns an equipment comprising two shoring rods, members for anchoring said two rods to the vertebrae, at least a crosspiece () in two parts () and members () assembling said crosspiece () to the shoring rods. The invention is characterised in that one of the crosspiece parts () comprises a spherical head () and a thread () adjacent to said head (); the other crosspiece part () comprises a spherical bulging end (), defining internally a spherical cavity () adapted to receive said head (), and each crosspiece () comprises a nut () designed to co-operate with said thread (), including further a spherical seat () with a shape matching that of the wall () delimiting the cavity (). The invention also concerns plates (for anchoring the equipment to the sacrum.

Vertebral arthrodesis equipment

An equipment includes at least a shoring rod and at least an anchoring assembly of the shoring rod to a vertebra; each anchoring assembly comprises a base integral with a hook which has substantially planar part, extending in a parallel plane, or forming a slight angle, less than 15 degrees, with the base. The base has a hole which runs right through it, having an oblong cross-section, and the anchoring assembly comprises a hook-shaped component whereof the part corresponding to the base of the hook is linked to a threaded rod capable of being engaged in the hole with the possibly of pivoting about an axis and of displacement in the plane, and capable of receiving a screw.

A vertebral osteosynthesis device includes at least two bone anchoring elements (,) in the vertebral bone structures respectively (S, L,.), a longitudinal linking member (,) between the bone anchoring elements, and connector links (,) between the bone anchoring elements and said linking members. Each bone anchoring element includes a bond fixing part (,), a head (,) to be gripped by a screwing device, a threaded shaft (,) extending the grip head, and a clamping element (,) to be screwed on said shaft to lock together the connector link, the longitudinal linking member and the corresponding bone anchoring element; the threaded shaft (,) is provided at its end with a hinge ball joint (,) in a housing (,) of the grip head (,), enabling a multidirectional adjustment of the shaft (,) and a positioning of the connector link (,) adapted to the vertebral segment configuration (S, L,, . . . Lw) receiving the bone anchoring elements.

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Croix-Chapeau, France

Bernard Villaret