Abstract: A method of surgically preparing a distal end of a femur for implantation of a femoral prosthetic component includes positioning a base cutting block and an intramedullary adaptor on the distal end of the femur such that a first end of the intramedullary adaptor is received in the medullary canal of the femur and the intramedullary adaptor is secured to the base cutting block, attaching a first modular cutting block to an anterior side of the base cutting block, resecting a first portion of the distal end of the femur using a cutting guide defined in the first modular cutting block, the cutting guide of the first modular cutting block, and resecting a second portion of the distal end of the femur using a base cutting guide defined in the base cutting block.

Abstract: A bone saw including a flexible, rectangular saw blade having a central longitudinal axis and a cutting edge at a distal tip, and a shaft. The shaft has a central longitudinal axis, and a blade passage within the shaft that houses the saw blade, where the central longitudinal axis of the saw blade, of the shaft, and of the blade passage, are parallel. Further included is a blade opening located through a distal end of the shaft and of the blade passage, the blade opening being perpendicular to the longitudinal axis of the shaft. Also, a curved abutment can exist within the blade passage, aligning the saw blade with the blade opening. Distally translating the saw blade within the blade passage can cause the saw blade to conform to the curved abutment and exit the blade opening with the cutting edge essentially perpendicular to the longitudinal axis of the shaft.

Abstract: A device for converting a rotational movement into a rotatively oscillating movement is described comprising a drive shaft, a second, rotatively oscillating shaft, a driving mechanism, a housing, and a gearing mechanism comprising a movable lever. A sawing device is also described.

Abstract: A bone cement is provided that includes a solid component and a liquid component. The solid component and liquid component are mixed together to form the bone cement. After completion of the solid and liquid component mixing, the bone cement has an initial viscosity effective for manual application or manual injection onto or into a targeted anatomical location, e.g., bone, and the cement has stable viscosity range that over both time and temperature is effective for uniformly filling the targeted anatomical location, for example an osteoporotic bone or a fractured vertebral body, with minimal to no leakage of the cement from the targeted anatomical location. Additionally, both the initial viscosity and the stable viscosity of the bone cement are within a range that renders the bone cement effective for injection with a manually operated syringe or multiple syringes.

Abstract: A spherical osteotomy device for the efficient surgical sectioning of bone includes a part spherical body and a shank. The part spherical body includes an outer surface, an inner surface, a cutting end between the outer surface and the inner surface, an axis extending from the outer surface through the inner surface, and an origin on the axis. The inner surface has a substantially constant radius extending from the origin. The shank extends outwardly from the outer surface of the body and is substantially aligned with the axis. Other embodiments of an osteotomy device are described. Also provided is a method of using the osteotomy device for performing spherical osteotomies.

Abstract: A hand-held surgical cutting instrument for cutting bone material with a surgical micro-saw blade has a plurality of openings formed therein. The surgical cutting instrument includes a hand-graspable body for manipulating the cutting instrument and a blade coupling mechanism attached to the body and being configured to attach to the surgical micro-saw blade. The blade coupling mechanism includes a first coupling member including a first blade-contacting surface. The first blade-contacting surface has at least one first protrusion extending therefrom and is configured to engage a first opening in the surgical saw blade. The blade coupling mechanism includes a second coupling member including a second blade-contacting surface facing the first blade-contacting surface of the first coupling member. The second blade-contacting surface having at least one second protrusion extending therefrom and configured to engage a second opening in the surgical saw blade.

Abstract: A joint replacement kit for use in a joint replacement procedure replacing a portion of a body joint. The kit includes a cutting guide and a trial component wherein the cutting guide and trial component are packaged together. There is also provided a method for replacing a portion of a body joint. The method includes providing a joint replacement kit having a cutting guide and a trial component, positioning the cutting guide against an end portion of a bone, cutting the end portion of the bone with a cutting instrument, positioning the trial component to the cut end portion of the bone, and disposing of the cutting guide and trial component.

Abstract: A spherical osteotomy device for the efficient surgical sectioning of bone includes a part spherical body and a shank. The part spherical body includes an outer surface, an inner surface, a cutting end between the outer surface and the inner surface, an axis extending from the outer surface through the inner surface, and an origin on the axis. The inner surface has a substantially constant radius extending from the origin. The shank extends outwardly from the outer surface of the body and is substantially aligned with the axis. Other embodiments of an osteotomy device are described. Also provided is a method of using the osteotomy device for performing spherical osteotomies.

Abstract: A surgical cutting blade for cutting bone material when the blade is coupled to a hand-held surgical saw includes a distal portion comprising a plurality of cutting teeth, a shank portion adjacent the distal portion, and a proximal portion adjacent the shank portion. The proximal portion may include a longitudinally extending slot having a proximal opening. The slot may be shaped to receive a portion of the surgical saw through the proximal opening. The proximal portion may have a plurality of deflectable fingers respectively separated from a plurality of main body portions by respective gaps. The plurality of deflectable fingers may extend adjacent the longitudinally extending slot, and may deflect into the gaps to increase and decrease a width of a portion of the slot.

Abstract: A surgical system for cutting tissue of a patient includes an outer housing and a reciprocating assembly structurally configured to carry a cutting tool in a reciprocating motion. An actuator knob is manually accessible to the user and may be fixed axially to the outer housing. The reciprocating assembly may reciprocate relative to the actuator knob. The actuator knob may be configured for rotational movement between a lock position and an unlock position. The system may also include a locking mechanism configured to retain a cutting tool within the reciprocating assembly. The locking mechanism may be responsive to movement of the actuator knob to maintain the tool within the output shaft when the actuator knob is in the lock position and permit removal of the tool when the actuator knob is in the unlock position. Surgical cutting tools, such as blades include thickness enhancing features.

Abstract: The invention includes a system and method for the loosening of tissue. In one embodiment, a method of removing intervertebral tissue includes removing tissue with a loosening member to form a void, inserting a portion of the loosening member into the void, and determining the amount of tissue removed based upon the volume defined by the portion of the loosening member inserted into the void.

Abstract: A surgical sagittal saw capable of actuating an assembly that includes a static bar and at least one drive rod and a blade head, both of which are pivotally mounted to the bar. The saw includes a receiving surface on which the blade assembly bar is seated. A clamp removably holds bar in a static position against the receiving surface. The saw includes at least one drive pin. When the bar is mounted to the plate, the drive pin engages the assembly drive rod. A motor is connected to the drive pin to oscillate the pin.

Abstract: The present disclosure relates generally to the field of tissue removal and more particularly to methods and devices for use in medical applications involving selective tissue removal. One exemplary method includes the steps of providing a tissue cutting instrument capable of distinguishing between target tissue to be removed and non-target tissue, urging the instrument against the target tissue and the non-target tissue, and allowing the instrument to cut the target tissue while automatically avoiding cutting of non-target tissue. Various tools for carrying out this method are also described.

Abstract: A modular bone resection guide system includes a positioning base configured to be attached to a bone, a modular resection block configured to be removably attached to various locations of the positioning base and a cutting tool configured to be supported and guided by the modular resection block while cutting the bone.

Abstract: Devices are described relating to the retaining of surgical tools within the chuck of a reciprocating surgical instrument, such as a reciprocating saw. A securing chuck is disclosed for securing a surgical tool to a reciprocating surgical instrument that comprises a shaft and a securing member. The shaft defines an axis and has a cylindrical bore extending along the axis. The bore is shaped to receive a substantially rounded tool shank. A pair of transverse slots extends into the shaft along a plane passing through the axis for receiving a substantially flattened tool shank. The transverse slots intersect with the cylindrical bore. The securing member is carried by the shaft and is radially movable relative to the bore both inwardly and outwardly to secure the surgical tool in the chuck.

Abstract: A modular prosthesis rasp is provided, having a rasp body with a rasp main body and at least one modular rasp body part connectable to the main body. The rasp main body has a receptacle for receiving the at least one rasp body part. An outer contour is defined by the rasp main body and the at least one rasp body part. The rasp body part receptacle extends from an indentation, defining a distal end of the receptacle, on a lateral side of the rasp main body to a proximal end thereof. A first tangential plane of the lateral side of the outer contour in the region of the indentation and a second tangential plane at a rasp body part contact surface, in the region of the distal end of the receptacle include an indentation angle of less than 85°.

Abstract: A bone resection system for a prosthetic implant having an anterior and posterior outer surface attached to bone has a cutting guide having slotted guide surfaces thereon mountable on the prosthetic implant. The guide surfaces are alignable with the implant outer anterior and posterior surfaces. A saw comprising a housing having spaced apart first and second sides joined by first and second edge surfaces and having a proximal end and a distal end can be inserted into the slotted guide surfaces. A cutting head drive system on the housing drives a cutting head having teeth extending outwardly of the distal end of the housing. A cam element is mounted on the saw housing intermediate the proximal and the distal ends. The cam element has a distal end with a guide arm extending therefrom engagable, during insertion, with the guide surface on the cutting guide. The cam element having a stop surface for engaging a stop surface on the cutting guide to limit blade travel.

Abstract: A surgical sagittal saw for use with a complementary blade assembly that includes a static bar. The saw includes a head over which the blade assembly bar is seated. A biasing member mounted to the saw head normally places a force of the blade assembly bar that urges the bar away from the blade head. A coupling assembly releasably holds the blade assembly bar in the static state to the saw head. When the coupling assembly is in the run state, holding the blade assembly to the saw head, the coupling assembly does so in opposition to the force the biasing assembly exerts against the blade assembly bar. During the process of removing the blade assembly from the saw, the force of the biasing assembly assists in the removal of the blade assembly bar from the saw head.

Abstract: A surgical sagittal saw blade with a static blade bar and to which a blade head is mounted. Distal from the proximal end of the blade bar, the sides of the bar taper outwardly. These outer taper sides facilitate the coupling of the blade bar to the complementary saw used to actuate the blade.

Abstract: Disclosed herein is a device for cutting bone in performing a pedicle subtraction osteotomy. The device may include an elongated member and a flexible cutting member. The elongated member includes a distal end, a proximal end, an elongated slot between the distal end and proximal end and extending generally parallel to a longitudinal axis of the elongated member, and a fulcrum located distal the proximal end. The elongated member is configured to be anchored to the bone. The flexible cutting member extends through the elongated slot and around the fulcrum such that at least a portion of the flexible cutting member can extend from the elongated slot to cut the bone as the flexible cutting member is moved back and forth in a sawing fashion about the fulcrum. The elongated member may be in the form of a threaded bone screw. The flexible cutting member may be in the form of an abrasive or tooth equipped wire, cable or rope.

Abstract: An apparatus and method are provided that allow for the realignment and stabilization of adjacent vertebrae. An implant of this invention both repositions adjacent vertebrae and remains in situ to maintain the new position. The implant has two halves which are interlocked such that they can slide horizontally with respect to each other. Movement of the implant halves and their respective positions are controlled by set screw within the implant. The implant includes radial anchors which fit into alignment slots made in the misaligned vertebra by the disclosed method. The set screws are used to advance the halves of the implant which in turn move the misaligned vertebrae back into correct positions. The correct position of the vertebrae is locked in place through a nut and a plate.

Abstract: A surgical sagittal saw blade and a complementary cutting guide for use with the blade. The blade includes a bar shaped to be releasably secured in a static position to a complementary surgical sagittal saw. A blade head with teeth is mounted to the bar to pivot. One or more drive links connected to the saw extend to the blade head to pivot the blade head. The cutting guide and blade bar have complementary features for holding the blade bar to above a surface of the cutting guide. The features that hold the blade bar to the cutting guide allow the blade to move over the cutting guide surface while constrain the blade from moving out of the plane immediately above the cutting guide surface.

Abstract: The invention includes a system and method for the loosening of tissue. In one embodiment, a device for use in an intervertebral tissue removal procedure includes a cannula having a first end portion for insertion into tissue, a feed passage within the cannula, a return passage within the cannula, and a loosening member movable within the feed passage and the return passage and at least partially deployable away from the first end portion of the cannula.

Abstract: A bone cutting and injecting device for cutting maxillary bone and injecting a filler through the maxillary bone under a subantral membrane to separate the subantral membrane from the maxillary bone and fill the space formed therebetween. The device includes a hollow tubular element having a diameter sized to be inserted into a pilot hole in the maxillary bone, a piston longitudinally displaceable within the hollow tubular element, and a cutter mounted to the piston and operably disposed adjacent the distal end of the hollow tubular element. A fluid path is defined through the hollow tubular element for guiding the filler, and the cutter is configured to redirect the filler in a transverse or radial direction relative to the longitudinal axis of the tubular element.

Abstract: A surgical sagittal saw blade assembly formed that includes a static bar, an oscillating blade head and at least one drive rod that reciprocates to oscillate the blade head. The bar is formed from two plates. A boss is pouch formed to extend up from one of the plates. The boss serves as the static pivot point around which the blade head oscillates. When the plates are secured together to form the bar, the top of the boss is welded to the inner surface of the second plate.

Abstract: In a saw for the removal of a prosthesis which is integrated with a bone, a blade is connected to a handle wherein the distal end of the blade includes a shaped nib. The shaped nib has teeth, with at least some of the teeth being angled to cut as the saw is moved in a backward direction. The nib additionally includes means for allowing the nib to be reversibly deformed such that in use its maximum width can be temporarily reduced.

Abstract: A method of surgically preparing a patella for implantation of a patella prosthetic component is disclosed.

Abstract: A surgical sagittal saw blade with a static blade bar shaped to be coupled to a sagittal saw. At least one drive rod extends through the bar. The drive rod is moveable within the blade bar. A blade crown, located outside the distal end opening of the blade bar is connected to the drive rod. The actuation of the drive rod by the saw results in the oscillation of the blade crown. Proximal to the distal end of the blade bar, the bar is formed with secondary openings. When the drive rod and blade crown are actuated, tissue entrained in the blade bar is discharged from the secondary openings.

Abstract: A number of orthopaedic surgical instruments are also disclosed. A method, apparatus, and system for fabricating such instruments are also disclosed.

Abstract: A device for removing material from within the body, includes an elongated element formed from hollow segments sequentially interconnected at effective hinges. The device assumes an insertion configuration for insertion of the segments sequentially through an opening of a first dimension into the body. A portion of the elongated element inserted into the body progressively assumes a material removing configuration in which a relative position of each segment relative to an adjacent segment is delineated by the effective hinge together with additional abutment surfaces defining a fully deflected state of the effective hinge. The material removing configuration has at least two dimensions exceeding the first dimension. At least two of the segments are formed with at least one opening, typically provided with a cutting configuration, deployed so as to receive material into a hollow volume of the segment during progressive formation of the material removing configuration as the elongated element is advanced.

Abstract: In a method of assembling a surgical saw blade assembly with an blade bar that contains an oscillating head, the blade bar is formed from opposed plates. One of the plates is punch stamped to define a boss around which blade head pivots. The plates are secured to one another in a series of steps in which spaced apart sections of the plates are welded together.

Abstract: A surgical saw includes a shaft, a first saw blade mounted on the shaft, a second saw blade mounted on the shaft parallel to the first saw blade, the first saw blade having a first tooth having two distal tips, and the second saw blade having a second tooth with a distal tip, the second tooth bent towards the first saw blade and the distal tip of the second tooth aligned with a centerline between the two distal tips of the first tooth.

Abstract: A femoral condyle cutting and shaping device includes a first bone shaping and cutting tool and at least one assistant shaft which are mounted in a sliding gearbox; at least one driven shaft mounted in a sliding gearbox; a first connecting member and a second connecting member, with one end of the first connecting member joining with one end of the second connecting member so as to form a hinge fitting; at least one other bone shaping and cutting tool mounted on the relevant driven shaft; an adjusting mechanism, which is connected with one driven shaft to change the relative position between the first bone shaping and cutting tool and the at least one other bone shaping and cutting tool. A bone shaping and cutting tool is also disclosed, which has flat or helical structure.

Abstract: An instrument kit is provided for reaming bone around a head of a bone, the bone including an implanted epiphysis component. The instrument kit includes a reaming guide and a reamer. The reaming guide is couplable to the epiphysis component and has a first reamer support feature and a second reamer support feature. The reamer is couplable to one of the first reamer support feature and the second support feature to ream bone around the epiphysis component.

Abstract: A sagittal saw blade with a blade body the distal end of which has spaced apart tines. Plural teeth extend forward from each of the tines. The void space between the tines functions as a chip catchment into which bone chips formed by cutting by the blade are able to flow. At least one web extends between the tines, across the chip catchment.

Abstract: A surgical saw includes a shaft, a first saw blade mounted on the shaft, a second saw blade mounted on the shaft parallel to the first saw blade, the first saw blade having a first tooth having two distal tips, and the second saw blade having a second tooth with a distal tip, the second tooth bent towards the first saw blade and the distal tip of the second tooth aligned with a centerline between the two distal tips of the first tooth.

Abstract: The reciprocating saw has two, superimposed, blades having a common axis and arcuate cutting surfaces adjacent each other. Part of one blade extends through an opening in the other blade so that the cutting edge of an upper blade is under the cutting edge of a lower blade. The blades' cutting edges extend around the blade or along a smaller arc. A linkage in the saw converts rotary motion of a motor into synchronous, counter-reciprocating motion of the blades about the axis. Counter-reciprocation minimizes action/reaction forces, which occur when a single reciprocating saw blade changes directions.

Abstract: An assembly for use in cutting a bone during a surgical procedure comprises a cutting tool and a guide block. The cutting tool includes a blade and a drive unit for imparting a cutting motion to the blade. The guide block can be positioned against the bone and has a reference surface for guiding the blade during the cutting step, the guide block having a screen surface which provides a point of reference to indicate proper alignment of the blade. The cutting tool includes means for directing a collimated beam of light in a direction parallel to the blade, on to the screen surface on the guide block when the blade is in contact with the guide surface, the distance between the blade axis and the light beam being equal to the distance between the reference surface and the point of reference on the screen surface.

Abstract: This invention discloses methods and devices using an improved surgical saw blade for resecting bone tissue during surgical procedures. The surgical saw blade may be used on oscillating, reciprocating, rotary or vibrational surgical saws. The disclosure describes the use of a cutting blade to resect hone tissue without excessive temperature rise during typical surgical procedures. The cutting blade provides a self-clearing design that includes at least two teeth disposed to prevent accumulation of bone chips within the proximity of the teeth. The design of the cutting blade allows the mechanical motion of the blade and other interactions between the blade and the tissue to remove accumulated bone chips and prevent excessive temperature rise.

Abstract: Described herein are stabilizers for surgical tools. One aspect provides a surgical tool stabilizer, comprising: a support configured to engage at least a portion of a surgical tool and configured to receive at least a portion of a tracking system; and a retractable stabilizer configured to surround at least a portion of an end effector of said surgical tool. Other embodiments are described.

Abstract: A bone resector tool (100) comprises an ultrasonic transducer (8), typically generating longitudinal mode vibrations at around 40 kHz, and having an elongate blade portion (2) mounted thereto. The transducer (8) and blade portion (2) are mounted to a rotatably-drivable converter element (3). Rotation of the converter element (3) produces reciprocal longitudinal motion of the transducer (8) and blade portion (2). A counterweight (5B) is also mounted to the converter element (3), moving exactly out of phase with the transducer (8) and blade portion (2), such that a centre of mass of the whole system is stationary, reducing vibration of the tool (100) in a user's hand. The peak velocity due to the ultrasonic vibrations of a distal tip (6A) of the blade portion (2) is up to seven times greater than its peak velocity due to the reciprocal longitudinal motion. This permits rapid, low-effort cutting of bone with easy removal of cut debris and minimal consequent necrosis.

Abstract: A device and method for use in a human spine to prepare a space between adjacent vertebral bodies and into the vertebral end plates to receive an implantable insert. The device includes a handle, a shaft, and a mounting member at one end of the shaft. An abrading element is mounted on the mounting member and is coupled to a drive mechanism. The drive mechanism is operable to move the abrading element in at least one degree of freedom to create surfaces having predetermined contours in the end plates of the adjacent vertebral bodies.

Abstract: A surgical saw for cutting bone that can be used with ease in tight places yet maintain sufficient cutting power. The surgical saw 10 has a flexible linear body made of twisted stainless steel wire and cutting parts formed on the flexible linear body. The cutting parts are made of abrasive material affixed to the flexible linear body 12a alternating with portions of the flexible linear body with no abrasive particles 12b. Auxiliary cutting parts 13 of lesser cutting power may be provided along both lateral sides of each of the cutting parts 12.

Abstract: A powered surgical handpiece includes a chuck assembly with a chuck having apertures. The chuck assembly is surrounded by a collar having slots on an inner face. The apertures and slots receive balls. In use, the collar is moved axially toward the handpiece against a spring force so that the chuck is viewable. A base tab of a cutting accessory is inserted into the chuck. When the collar is released, detents of the base tab are radially aligned with at least two balls and apertures. When a biasing spring moves the collar outwardly, the respective balls move radially inwardly into the detents to fixedly lock the cutting accessory. The handpiece includes a single eccentric gear shaft that receives a rotary force at one end and moves about an orbital path at a second end. An oscillator receiver of an oscillator receives the barrel. Movement of the barrel about the orbital path results in oscillation of the oscillator about its axis.

Abstract: There is provided a surgical saw blade for use in orthopaedic surgery. The saw blade comprising: a mounting cavity having a first substantially triangular-shaped opening and a second substantially triangular-shaped opening in communication with, and inverted relative to, the first opening, the first and second opening collectively define two mounting slots that form an angle relative to one another. In some embodiments, the planar portion further comprises an offset planar shelf. The offset shelf may be oriented along the length of the planar portion to allow for longitudinal reciprocation or may be oriented across the width of the planar portion to allow for lateral reciprocation.

Abstract: A surgical sagittal saw with a head that is able to index, rotate, relative to the longitudinal axis of the saw housing. The head has a neck that extends into an open distal end of the housing. A biasing assembly holds the head and neck sub-assembly in the open distal end of the housing. The biasing assembly is rotatable relative to the housing. A separate lock mechanism selectively holds the head in a fixed orientation around the saw housing longitudinal axis.

Abstract: A series of instruments (30, 80, 120, 210, 510, 550) are provided for direct-anterior and oblique-anterior disc space and end plate preparation. The instruments (30, 80, 120, 210, 510, 550) provide precise guidance for channel formation in the vertebral endplates by guiding rotating and bladed cutting instruments (122, 250, 580). Instrumentation (550) for oblique-anterior disc space preparation includes compound angulation to account for the angle of approach to the spine and the angulation between adjacent vertebrae. Methods and techniques for use of the instruments (30, 80, 120, 210, 510, 550) are also described.

Abstract: Methods and devices are described for modifying tissue in a spine of a patient to treat or alleviate spinal stenosis. In one embodiment, a method may include: advancing at least a distal portion of an elongate tissue modification device into an epidural space and between target tissue and non-target tissue in the spine; positioning the tissue modification device so that at least one abrasive surface of the device faces target tissue and at least one non-abrasive surface faces non-target tissue; applying tensioning force at or near separate distal and proximal portions of the tissue modification device; and translating the tissue modification device back and forth while maintaining at least some tensioning force to abrade at least a portion of the target tissue with the at least one abrasive surface. Unwanted damage to the non-target tissue may be prevented via the at least one non-abrasive surface.

Abstract: A surgical sagittal saw blade that including a guide bar shaped to be releasably secured in a static position to a complementary surgical sagittal saw. A blade is mounted to the guide bar to pivot around a pivot point. The blade has teeth located outside of the guide bar. Drive rods extend from the blade. The drive rods connect to a complementary driver integral with the saw. When the saw driver is actuated, the drive rods undergo reverse reciprocation. The reciprocation of the driver rods cause the blade to oscillate around a pivot point.

Abstract: A saw blade provided with two walls set apart from each other and with blade teeth arranged on each wall in a pattern along the distal end of each wall and on the inner surface of each wall. During a single cutting motion, the distal teeth provide the initial cut and the inner teeth remove additional material along the pathway. This increases the amount of material removed in one cut, leaving a small amount of material (bone) at the bottom of the slot for the surgeon to remove in the final step. Thus, the blade configuration and the tooth pattern of the saw blade improves the cutting efficiency.