Abstract: A vertebral auxiliary fixation device comprises a receiving piece, a sliding piece, and a plurality of fastening elements. The receiving piece is provided with two sliding grooves in which the sliding piece is slidably received. The receiving piece and the sliding piece are provided respectively with through holes engageable with the fastening elements which are fastened onto a vertebra intended to be fixed.

Abstract: An implant for use in spinal stabilization includes four generally linear thread segments. The thread segments are maintained and spaced apart alignment by rigid supports. The thread segments include a plurality of individual threads with the individual threads of the segments defining a thread pattern. The supports and the thread segments define a hollow implant interior exposed to an exterior of the implant.

Abstract: Polymeric medical fixation screws with multiple cannulations and thereby a reduced risk of shearing while being torqued into place are provided. The polymeric screws have at least two cannulae, on either side of a central longitudinal axis of the screw, extending parallel to the longitudinal axis. Torquing instruments are inserted into the cannulae so that the applied torque force for driving the screws into a bone hole is distributed along the shaft of the screw. In one embodiment, the invention provides interference screws, while in other embodiments the invention provides medical fixation screws with heads and soft tissue-to-bone anchors or suture anchors. The polymeric screws may be fabricated from virtually any suitable biocompatible polymers or composites, including bioabsorbable polymers and their composites.

Abstract: A femoral component used in an artificial knee joint has an integral body provided with a lateral condyle protecting top, a medial condyle protecting top, and a condyle groove protecting edge. The lateral condyle protecting top and/or the medial condyle protecting top are provided respectively with at least one retaining slot or hooking eye in the outer side thereof. The retaining slot or hooking eye serves to enable the femoral component used in the artificial knee joint to work in combination with a femoral hipbone rehabilitating device, such as a bone plate.

Abstract: A vertebral fixation device comprises a hooking element and a clamping element. The hooking element is provided at the top thereof with a plate portion having a fastening hole and at the bottom thereof with a hooked portion. The clamping element is provided at the bottom thereof with a fastening and clamping portion and at the top thereof with a threaded portion engageable with the fastening hole of the plate portion of the hooking element. The clamping element and the hooking element can be caused to hold securely a deformed or injured vertebra by turning and tightening the threaded portion of the clamping element.

Abstract: An angled bone fixation apparatus including a bone screw having a first end portion adapted to be surgically implantable into a patient's vertebral bone mass and at first and second spaced apart positions on the bone mass and a second end portion having a head portion with a load transfer surface thereon and a top surface. An elongated plate member having upper and lower surfaces angled with respect to each other and an elongated plate slot having a longitudinally extending axis with the slot being surrounded by a peripheral portion having outer opposed edges. The plate member has a first and second angled sidewall at the slot with the sidewalls each forming an acute angle with the upper and lower plate surfaces. A washer interfaces with the plate member and the bone screw, for distributing load from the bone screw to the plate member with the washer including an opening and upper and lower surfaces with the lower surface having a pair of spaced apart projections extending therefrom.

Abstract: A system and method to form a surgical construct using spinal rods and bifurcated connectors. One or more spinal rods such as those used in fusing vertebrae of the spine are attached with the bifurcated connectors to form the surgical construct. The bifurcated connector may be used with pedicle screws, lamina clamp assemblies or vertebra hook assemblies for installation of the surgical construct adjacent to selected portions of the patient's spine. A cap or end closure cooperates with an associated deformable coupling to position the spinal rod within the bifurcated connector. The spinal fixation system may consist of a pair of rods installed on opposite sides of the spine or a single midline spinal rod. The connectors and their associated mechanism for attaching instrumentation to the patient's spine are readily adaptable for use with either parallel rods on opposite sides of the patient's spine or a single midline spinal rod fixation system.

Abstract: A vertebral locking and retrieving system includes a plurality of horizontal locking and retrieving member sets, a plurality of vertebral locking members, a plurality of connecting member sets, and a central locking rod. Each of the horizontal locking and retrieving member sets is composed of a locking rod retainer and two locking member retainers fastened respectively to two opposite sides of the locking rod retainer. Each of the vertebral locking members has one end for locking a vertebra and another end fastened to one of the locking member retainers. The connecting member sets are used in fastening the vertebral locking members to the locking member retainers and in fastening the central locking rod to the locking rod retainer. A horizontal locking of a vertebra is achieved by the horizontal locking and retrieving member sets while a longitudinal locking of the vertebra is attained by the central locking rod connecting the horizontal locking and retrieving member sets.

Abstract: A dual-tier spinal clamp locking and retrieving system comprises a slotted clamp member, a tongued clamp member, and a clamp adjusting device. The slotted clamp member is composed of a hooked portion to hold a vertebra intended to be locked, a connecting portion, and a locking block having a through hole. The connecting portion or the locking block has one or more locking slots. The tongued clamp member is composed of a hooked portion to-hold another vertebra intended to be locked, a connecting portion, and a tongue having thereon a locking block with a through hole. The tongue is dimensioned to fit into the locking slot of the slotted clamp member. The clamp adjusting device holds together the slotted clamp member and the tongued clamp member to effect a first tier locking mechanism. The tongue of the tongued clamp member is inserted into and held in the locking slot of the slotted clamp member so as to bring about a second tier locking mechanism.

Abstract: A dual-tier spinal locking and retrieving system comprises a plurality of spinal pins, one or more lower auxiliary locking members, a plurality of connecting members, one or more upper auxiliary locking members, and a plurality of locking devices. Each of the spinal pins is provided with a fastening portion, a stop portion and a first receiving portion. The lower auxiliary locking members are used to brace or tighten the first receiving portion of the spinal pin so as to establish a lower auxiliary locking framework. The connecting member is provided with a second receiving portion and a third receiving portion. Ther upper auxiliary locking members are used to brace or tighten the third receiving portion of the connecting member so as to established an upper auxiliary locking framework. The locking devices are used to construct a dual-tier spinal locking and retrieving system for which a percutaneous instrumentation is provided.