Abstract: A construction, wherein a cutter portion for attachment 13 is provided at one end of a screw 12 having a through-hole 17 in the shaft center, a cutting edge part for attachment 13 which acutely forms a pair of facing protrusions 20 formed by a pair of inclined planes 21, and protrusions 20 which have cutter blades 13A.

Abstract: A bonesetting connecting member (1, 17, 19, 21) having an end area supported by a bonesetting tool (5) appropriately mounted to a vertebra (3), thereby connecting the vertebra (3), comprises a polygonal tool engaging portion (11) provided on a body of the bonesetting connecting member (1, 17, 19, 21), and a tool restricting portion (13) for preventing a tool from moving toward opposite sides of the tool engaging portion (11).

Abstract: Bone connecting tool for interconnecting vertebral bodies. The bone connecting tool includes a rod member having a first hook portion. A rod engaging member is fixed to the rod member having a second hook portion. A projection portion for eating into an arch of vertebrae is provided in the second hook portion.

Abstract: A vertebral body distance retainer comprises a retainer member including engaging portions to be engaged with a pair of rods provided on a plurality of adjacent vertebral bodies and abutting portions capable of freely abutting on spinous processes of the adjacent vertebral bodies, and fixing screws which fix the rods being engaged with the engaging portions. The vertebral body distance retainer is disposed between the spinous processes each existing on the adjacent vertebral bodies, so that the distance between the spinous processes can be retained constant.

Abstract: A rod distance retainer comprises a coupler link including rod engaging concave portions which engage a pair of rods fixing a plurality of adjacent vertebral bodies, and fixing screws which fix the rods which is engaged with the rod engaging concave portions. In the rod distance retainer of the present invention, taper faces are formed on tip portions of the fixing screws to enable the fixing screws to abut on peripheral surfaces of the rods.

Abstract: A vertebral connecting rod and a spinal osteosynthesis device are disclosed. The vertebral connecting rod 1, which is adapted to be rigidly supported with a pair of spinal implants 5, 5 anchored to vertebral bodies 3, 3 such as thoracic vertebrae or lumbar vertebrae etc., has a pin-shaped section 7 of which one distal end formed with a hook segment 11 for hanging an interconnecting member 9. A slip-out protective member 19 is engageable with the hook segment 11. In a preferred embodiment, the pin-shaped section has at its arbitrary position formed with an engagement convex segment 27 adapted to engage with a corresponding engagement concave recess formed in the spinal implant 5.

Abstract: A bone connector includes a first screw, a second screw and a coil spring. The first screw is screwed into one centrum. The second screw is screwed into another centrum. The coil spring connects an upper portion of the first screw to an upper portion of the second screw. The bone connector allows that a positional relation originally set between the centrums is changed in some degree.

Abstract: An implant for bone connector includes a fixing clamp, an implant body, a connecting portion and a movable clamp. The fixing clamp has a curved shape and supports a vertebral arch of a vertebra by grasping the vertebral arch. The implant body is provided on an upper portion of the fixing clamp. The connecting portion with which the connecting member is engaged is provided with the implant body. The movable clamp, which has a curved shape and grasps the vertebral arch, is provided to the implant body and is disposed to be opposed to the fixing clamp.

Abstract: An implant for bone connector includes an implant body, a hook portion, a fixing clamp and a movable clamp. The fixing clamp has a curved shape and supports a vertebral arch of a vertebra by grasping the vertebral arch. The implant body is provided on an upper portion of the fixing clamp. The hook portion over which a connecting member is hooked is provided on an upper portion of the implant body. Further, the movable clamp, which has a curved shape and grasps the vertebral arch, is provided on the upper portion of the implant body and is disposed to be opposed to the fixing clamp.

Abstract: A driver tool for a spinal implant having an implant body and an anchoring screw portion, and a nut member screwed onto a head portion of the implant body and having an upper wall formed with a tool engagement groov. The driver tool includes an elongated shaft, and a tubular tool end having substantially the same diameter as that of the nut member. The tubular tool end has an engaging segment engageable with the engagement groove formed on the upper wall of the nut member.

Abstract: A vertebral connecting rod and a spinal osteosynthesis device are disclosed. The vertebral connecting rod 1, which is adapted to be rigidly supported with a pair of spinal implants 5, 5 anchored to vertebral bodies 3, 3 such as thoracic vertebrae or lumbar vertebrae etc., has a pin-shaped section 7 of which one distal end formed with a hook segment 11 for hanging an interconnecting member 9. A slip-out protective member 19 is engageable with the hook segment 11. In a preferred embodiment, the pin-shaped section has at its arbitrary position formed with an engagement convex segment 27 adapted to engage with a corresponding engagement concave recess formed in the spinal implant 5.

Abstract: A spinal implant for an osteosynthesis device has a vertebral connecting rod for interconnecting adjacent vertebral bodies and comprises an implant body including a head section having a threaded portion, a rod retaining recess opening outward for retaining the connecting rod therein and a slanted engagement surface formed on a bottom wall of the rod retaining recess. The spinal implant further includes a nut member and a rod movement stabilizing device to preserve mobility to the connecting rod.

Abstract: A bonesetting connecting member (1, 17, 19, 21) having an end area supported by a bonesetting tool (5) appropriately mounted to a vertebra (3), thereby connecting the vertebra (3), comprises a polygonal tool engaging portion (11) provided on a body of the bonesetting connecting member (1, 17, 19, 21), and a tool restricting portion (13) for preventing a tool from moving toward opposite sides of the tool engaging portion (11).

Abstract: In a bone connecting tool comprising a rod connecting member 5 attachable to an arch of vertebrae 3 in a corpus vertebrae 1, and a rod member 9 having a rod portion 7 freely fixed to the rod connecting member 5, wherein a projection portion 23 for eating into the arch of vertebrae 3 is provided in a second hook portion 13 provided in the rod connecting member 5, the rod member 9 is provided with a processus spinosus 27 in the corpus vertebrae 1 or a first hook portion 25 freely hooked to the arch of vertebrae 3 in one end portion thereof, and a projection portion 29 for eating into the processus spinosus 27 or the arch of vertebrae 3 is provided in the first hook portion 25 The rod member 9 and 31 are formed in a substantially J shape or a substantially V shape, and a projection portion 37 eating into the processes spinosus 27 is provided inside a bent portion 35.

Abstract: A spinal implant for an osteosynthesis device, which implant includes an implant body 18 having a rod retaining section 28, 54 to retain a connecting rod 14, and an anchoring screw section 20 extending from the implant body. The anchoring screw section 20 has a spinal opening 24, 46 to permit borne ingrowth therein. The rod retaining section 28, 54 includes a rod movement stabilizing means 35. A nut member 32, 52 is screwed onto a head section of the implant body, and has a tool engagement groove 56. A driver tool 70, 78 has an engaging segment or tip 72a, 78c, that engages with the tool engagement groove of the nut member. A nut guide 80 is provided for momentarily guiding and retaining the nut in place such that it is subsequently removed to the head section of the implant body with the use of the driver tool 78 passing through the nut guide.

Abstract: A slider 37 having a rod-pressing portion 35 for pressing a rod 23 into a rod-engaging recess 25 is movably provided on a holder body 27 having the rod-engaging recess 25. The holder body 27 includes a pressing state holding mechanism for relatively moving the slider 37 with respect to the holder body 27 to hold the rod 23 in a state in which the rod 23 is pressed against the rod-engaging recess 25 by the rod-pressing portion 35. The pressing state holding mechanism includes a screw rod movably, detachably and threadedly engaged with a screw hole formed in the holder body 27. A tip end of the screw rod 45 and the slider 37 connected to each other such that they permit rotation of the screw rod 45 with respect to the slider 37 but move integrally with respect to the holder body 27, and the slider 37 can be attached to and detached from the slider 37.