Abstract: The present invention provides surgical retractors that can prevent their own arms and handle portions from being raised even when a deep portion of a surgical incision needs to be held open. The surgical retractors are provided with a pair of arms which are openable and closable via a hinge portion and include a blade for spreading and holding an incision open at an extremity portion of the arms and a pair of handles for performing an open and close operation of said pair of arms, the handles being provided on said arms respectively. At the extremity portion of each arm is provided a bent arm portion that bends downward in relation to the arm. A bend line L, formed at the extremity portion of said blade provided at the extremity portion of the bent arm portion, is substantially parallel with said arm when seen from a lateral side.

Abstract: A connector is provided with a first fastening member 55 having an engagement hole 53 freely engaging with a head portion of an implant 41 screwed and inserted to a body of vertebra and a fastening groove 57, a second fastening member 63 having an insertion hole 61 freely inserting a rod 49 therethrough and a fastening groove 65, and a fastening device 69 freely penetrating a through hole 59 crossing to the fastening groove 57 in the first fastening member 55 and a through hole 67 crossing to the fastening groove 65 in the second fastening member 63, and an angle adjusting and engaging portion is provided on connecting surfaces 55a and 63a between the first fastening member 55 and the second fastening member 63.

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: 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.

Abstract: An intervertebral cage 41 of the present invention is comprised of a main body 43 defined by an upper surface 43 E, a lower surface 43 D, a pair of side surfaces 43A, 43B; and withdrawal prevention means formed on the upper and/or the lower surfaces of the main body 43 and asymmetrically in a sectional side view.

Abstract: A rod connector 1 is provided with a rod supporting portion 9 in a part of a connector main body 11 supported to a leading end of a shank portion 3. A rod pressing portion 15 is provided in a side opposing to the rod supporting portion 9, and a rod 7 is clamped and fixed by the rod pressing portion 15 and the rod supporting portion 9. At this time, small convex portions 25 provided in the rod supporting portion eat into the rod 7.

Abstract: A vertebra body plate 1 is comprised of a main body portion 3 having an approximately point symmetric shape around a point O in which a first diagonal line M connecting a pair of acute angle portions A, C′ having acute angles opposing to each other, crosses a second diagonal line N connecting a pair of obtuse angle portions B, D′ having obtuse angles opposing to each other, a pair of screw insertion holes 9 provided on or near the first diagonal line M of the main body portion 3, and two spike 7 provided on each of the first diagonal line M and the second diagonal line N.

Abstract: The fixing apparatus 1 is comprised of a pressure fixing device 13 for freely pressure fixing the rod portion 7R to a circular arc rod engagement portion 9 freely engaging with the rod portion 7R, and small protruding portions 15, 15 eating into the rod portion 7R and having an acute angle in both end sides of the rod engagement portion 9 outside the pressure fixing device 13. Further, a recess surface 9A of the rod engagement portion 9 between the small protruding portions 15, 15 provided in the rod engagement portion 9 is formed as a rough surface.

Abstract: The upper and lower surfaces 5 and 7 of an intervertebral spacer 1 inserted between the vertebrae of a spine are formed in the shape of a curved surfaces 21A and 21B each having a top portion at the middle portion in the back and forth direction. The above-mentioned upper and lower surfaces 5 and 7 are provided with a plurality of claw portions 17 for preventing withdrawal. Further, the intervertebral spacer 1 is formed in such a way that a tip portion in the direction of insertion is tapered.

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: Hook cable including a hook for hooking to an arcus posterior in an atlanto. A cable which can freely bend is integrally provided in a base portion of the hook.

Abstract: A connector is provided with a first fastening member 55 having an engagement hole 53 freely engaging with a head portion of an implant 41 screwed and inserted to a body of vertebra and a fastening groove 57, a second fastening member 63 having an insertion hole 61 freely inserting a rod 49 therethrough and a fastening groove 65, and a fastening device 69 freely penetrating a through hole 59 crossing to the fastening groove 57 in the first fastening member 55 and a through hole 67 crossing to the fastening groove 65 in the second fastening member 63, and an angle adjusting and engaging portion is provided on connecting surfaces 55a and 63a between the first fastening member 55 and the second fastening member 63.

Abstract: A connector is provided with a first fastening member 55 having an engagement hole 53 freely engaging with a head portion of an implant 41 screwed and inserted to a body of vertebra and a fastening groove 57, a second fastening member 63 having an insertion hole 61 freely inserting a rod 49 therethrough and a fastening groove 65, and a fastening device 69 freely penetrating a through hole 59 crossing to the fastening groove 57 in the first fastening member 55 and a through hole 67 crossing to the fastening groove 65 in the second fastening member 63, and an angle adjusting and engaging portion is provided on connecting surfaces 55a and 63a between the first fastening member 55 and the second fastening member 63.

Abstract: Connector connecting an implant to a bone connecting rod. The connector includes a first fastening member provided with an engagement hole freely engaging with a head portion of the implant anchored to the vertebral bodies and a fastening groove. A second fastening member is provided with an insertion hole freely inserting the rod therethrough and a fastening groove. A through hole penetrating in a direction crossing to the fastening groove in the first fastening member and a through hole penetrating in a direction crossing to the fastening groove in the second fastening member are provided with fastening devices.

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 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 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: 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.