Abstract: A dynamic sensing method and apparatus employs microelectromechanical systems (MEMS) and nanoelectromechanical (NEMS) surgical sensors for gathering and reporting surgical parameters pertaining to a drive mechanism of a surgical device, such as speed, rotation, torque and other characteristics of the surgical device. The surgical device employs or affixes the surgical sensor on or about a surgical device for detecting electromechanical characteristics during the surgical procedure. The surgical procedure disposes the medical device in the surgical field responsive to the drive mechanism of a shaver or other endoscopic instrument inserted in a surgical field defined by the surgical procedure.

Abstract: Instruments and methods for preparing an intervertebral space for receiving an implant. An adjustable trial implant has an adjustable stop mechanism having a stop member connected thereto to vary the distance that a body portion of the trial implant can move into the intervertebral space. Cutting tools for forming cutouts in the adjacent vertebrae use the trial implant and/or a guide to position a cutting tool which may be a burr or a chisel. The chisel cutting tool can be moveable relative to a selected trial implant or the chisel cutting tools can be fixed onto a trial implant shaped body portion.

Abstract: A system for cleaning and milling bone to form bone chips. The system includes a shell into which bone stock is introduced. Internal to the shell is a cleaning element that removes soft tissue and other material surrounding the bone stock. The cleaned bone stock is transferred through an opening in the shell to a mill unit. The mill unit has a milling element against which the bone is disposed. The milling element, when actuated coverts the bone stock into bone chip. A motor drives both the cleaning element and the mill element. The shell and mill unit may be part of a head unit. The head unit is removably attached to a base in which the motor is disposed.

Abstract: A tissue treatment device comprises a housing having a chamber that receives a treatment fluid mixture of tissue morsels and a scaffold material. A debriding shaft including a plurality of cutters is coupled with the housing. The debriding shaft extends proximally within the chamber and extends distally from the end of the housing. The debriding shaft is inserted within a treatment site such as a fistula tract and is rotated and reciprocated such that the debriding shaft removes tissue cells along the site. The site is flushed with saline or other irrigating fluid followed by application of the treatment fluid mixture. The chamber of the housing comprises agitators positioned adjacent the debriding shaft. The treatment fluid mixture passes through the chamber of the housing along and between the outer surface of the debriding shaft and the agitators for thorough mixing before exiting the device at the treatment site.

Abstract: A device for percutaneously excising tissue. In an embodiments the device comprises an outer tubular. In addition, the device comprises an inner tubular slidingly received within the outer tubular, wherein the inner tubular has a distal end including an upper member and a lower member. Further, the device includes an open position with the distal end fully extended from the outer tubular, and a closed position with the distal end disposed within the outer tubular, wherein the upper member is biased away from the lower member and is disposed at an open angle ?O relative to the lower member when the device is in the opened position.

Abstract: Methods and apparatus provide for modifying a patient's femur to receive a patellofemoral prosthesis, including: a distal punch, an anterior punch and a trochlear punch which are used in well defined orientations to remove material from the femur to accommodate complex geometries of a patellofemoral prosthesis; and optionally a guide operating to engage a distal end of the femur, the guide including a distal slot, an anterior slot and a transverse slot, which ensure that the punches achieve the desired orientations.

Abstract: A tibial tray configured for use in a bi-cruciate retaining knee procedure can include a medial portion, a lateral portion, and an anterior connecting portion. The medial portion can have a medial superior bearing opposing surface, a medial inferior bone opposing surface, and a medial connecting surface. The lateral portion can have a lateral superior bearing opposing surface, a lateral inferior bone opposing surface, and a lateral connecting surface. The anterior connecting portion can connect the medial and lateral portions and cooperate with the medial and lateral portions to define a slot therebetween. The medial and lateral connecting surfaces can be formed on converging planes from respective inferior surfaces to superior surfaces of the tibial tray.

Abstract: A rongeur has an elongated shank having a distal end and a proximal end. An elongated crossbar, which moves between a retracted position and a tissue capturing position position, has a distal end and a proximal end and reciprocates axially with respect to the shank. A first tip is selectively connected to the shank. The first tip has a proximal end and a distal end. The proximal end has a reduced diameter post. In the selectively connected position, the reduced diameter post of the first tip is received in a bore of the shank. A second tip is selectively connected to the crossbar. The second tip has a proximal end and a distal end. The proximal end has a reduced diameter post. In the selectively connected position, the reduced diameter post of the second tip is received in a bore of the crossbar.

Abstract: A system for performing a resection of a selected portion of an anatomy with a resection instrument. The system includes a first member, a first movement defining portion defined by the first member, a second member, and a second movement defining portion of the second member. The first member is fixable to the selected portion of the anatomy. The second member is configured to cooperate with the first member. The first movement defining portion and the second movement defining portion are operable to allow the second member to be moveable relative to the first member from a first position to a second position. The resection instrument is positionable relative to the second member in the first position and in the second position to form a selected resection of the selected portion of the anatomy.

Abstract: The nucleotomy device makes it possible to produce a nuclear space Es in an intervertebral disc Di using a transosseous approach previously pierced in the body of a vertebra Va. The device includes a tool holder (2) provided with first connection elements (3) ensuring the placement of an electric rotary driving motor (4), second connection elements (5) for the placement of a blade cutting tool (6), driving elements (7) imparting rotational and longitudinal translational movements to the cutting tool (6), and injection and suction elements (8) making it possible to evacuate the debris from the nucleus resulting from cutting when it is formed inside the intervertebral disc.

Abstract: In a facet joint reamer with a shank and teeth at the distal end, the distal end is widened compared with the remainder of the shank.

Abstract: A device for percutaneously excising tissue. In an embodiment, the device comprises an outer tubular. In addition, the device comprises an inner tubular slidingly received within the outer tubular, wherein the inner tubular has a distal end including an upper member and a lower member. Further, the device includes an open position with the distal end fully extended from the outer tubular, and a closed position with the distal end disposed within the outer tubular, wherein the upper member is biased away from the lower member and is disposed at an open angle ?O relative to the lower member when the device is in the opened position.

Abstract: A surgical sliding shaft instrument is provided. The instrument can include a shaft part, a slide part, which is guided so as to be movable in a longitudinal direction on the shaft part, working elements disposed on distal ends of the shaft part and the slide part, and a proximal handle for reciprocal movement between a rest position and an operative position. The shaft part and the slide part can abut one another with sliding surfaces. The slide part can be interrupted by first rinsing slots. The shaft part can be interrupted by second rinsing slots. The first rinsing slots of the slide part and the second rinsing slots of the shaft part can be constructed and disposed so that in the rest position of the instrument the first rinsing slots and the second rinsing slots adjoin one another in the longitudinal direction alternately without overlapping one another.

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: The present invention relates to systems and methods for preparing the trochlear groove of a patient's femur to receive a prosthesis thereon. In the system, a combination drill-and-alignment guide includes at least a proximal and intermediate section, and preferably also includes a distal section. Guide holes for receiving guide pins therein are located in the proximal and distal sections of the guide. After the guide is positioned using at least one of several visual and/or tactile guide references in the system, the guides pins are placed through the guide holes of the guide and into bone. The guide may then be removed and replaced by cannulated reamers that are rotated and used to resect a predetermined amount of bone around the guide pins. A prosthesis having at least a portion of an outer surface that substantially matches the trochlear groove of the patient in a pre-degenerated state is then implanted on the resected bone.

Abstract: Embodiments include a robotic mechanism that may be utilized to position prosthetic implants in a patient's body. During joint replacement surgery and other surgical procedures, prosthetic implants may be placed in a patient's body. The robotic mechanism may be utilized to control movement of a cutting tool during resection of bone in a patient's body. The robotic mechanism includes a programmable computer which is connected with the force transmitting member by a motor. A force measurement assembly is connected with the force transmitting member and the computer. The output from the force measurement assembly is indicative of a resistance encountered by the force transmitting member. A position sensor is connected with the force transmitting member and the computer. The position sensor has an output indicative of the position of the force transmitting member.

Abstract: A rotation sensor system is included with a surgical instrument having an outer tube, an inner rotating member rotatably disposed within the outer tube and a handpiece coupled to proximal ends of the outer tube and the inner rotating member. The rotation sensor system includes a magnetic member provided on the inner rotating member near the proximal end of the inner rotating member, a magnetically permeable member provided on the outer tube near the proximal end of the outer tube, and a sensor provided on the handpiece to sense magnetic flux of the magnetically permeable member adjacent to the sensor. This sensed magnetic flux can be used to determine the rotational position of the inner rotating member relative to the outer. tube. Such information can be used to control the position of the cutting member relative to the cutting window when a surgeon stops rotating the inner rotating member.

Abstract: A surgical instrument, in particular a laminectomy rongeur or a conchotome, with a shaft and with a one-piece sliding part, longitudinally displaceable relative to the shaft, with which for longitudinal displacement a grip part is associated which is pivotable about a pivot axis, wherein the sliding part is able to be transferred from a working position, in which the sliding part is guided longitudinally displaceably on the shaft in a guide, into a cleaning position, in which the sliding part is freed from the guide and is pivotable relative the shaft about a rotation axis oriented perpendicularly to the longitudinal extent of the shaft. The rotation axis is aligned perpendicularly to the pivot axis of the pivotable grip part.

Abstract: The invention relates to a surgical instrument comprising a handling part and a tool part that encompasses at least one movably mounted tool which is actuated via a force-transmitting and/or actuating mechanism. The force-transmitting and/or actuating mechanism is operated from the handling part and is provided with a fluid-operated drive unit. With the drive unit in a first driving position the movably mounted tool is subjected to a first actuating force in an actuating direction and in at least a second driving position is subjected to at least a second actuating force in the actuating direction.

Abstract: The present disclosure relates to resection devices and methods. The resection device includes an outer tubular member; and an inner tubular member disposed within the outer tubular member, the inner tubular member including a burr having a body with flutes extending along a length of the body, the flutes including parabolic wave patterns located along surface edges of the flutes. In an embodiment, the parabolic wave patterns extend along entire lengths of the flutes. Other resection devices and methods are also disclosed.

Abstract: A tissue splitter for creating a subcutaneous cut is disclosed. The tissue splitter includes a retractable blade located at the distal end. The tissue splitter is configured to be insertable into a slotted cannula that is placed via an incision to a location proximate a patient's spine. An actuator at the proximal end of the instrument projects the blade located at the distal end from its retracted state through the slot of the cannula to an extracted state to subcutaneously cut tissue at a location outside the cannula. The instrument is configured such that the blade is movable inside the slot of the cannula by a distance such that the cut created by the blade remains subcutaneous and does not puncture the skin of the patient. The distance is adjustable for the size and depth of the cut and is limited by an adjustment collar.

Abstract: A tissue resection device includes a housing, a drive shaft, and a set of cutting inserts arranged in sequence. The cutting inserts are connected in the sequence by off-axis torque couplings so that each cutting insert may lie at an angle to an adjacent cutting insert. Each cutting insert includes at least one cutting edge, and the cutting edges in sequence form a cutting profile which may include a combination of straight and curved sections. The housing may be curved. Rotation of the drive shaft rotates the set of cutting inserts to form a cutting burr.

Abstract: Instrument and method for removing material from an intervertebral disc. The instrument includes outer and inner tubular members. The outer tubular member defines a passage and a cutting window. The inner tubular member is coaxially disposed within the passage, and defines a central lumen and a cutting tip. The cutting tip forms an open mouth having a plurality of teeth. Upon assembly, the cutting tip is exposed within the cutting window combining to define a shaving head. A manual decorticating implement is coupled to the outer tubular member and defining a scraping surface. A powered handpiece is coupled to the inner tubular member, and the shaving head is inserted into an intervertebral disc and positioned such that the cutting tip contacts targeted material (e.g., nucleus, annulus and/or end plate). The handpiece is activated to rotate the cutting tip relative to the cutting window. Contacted material is sheared between an edge of the cutting window and the teeth of the cutting tip.

Abstract: A sonotrode for an ultrasonic surgical instrument has a shaft and an instrument head at a distal end of the shaft. The instrument head is equipped with a cutting structure for the treatment of bones. The shaft has a helical cut-out. The helical cut-out is provided with a transversely running shoulder. A method produces a sonotrode and a surgical instrument having such a sonotrode. As a result of the shoulder in the helical cut-out, the torsional vibration of the instrument head is amplified such that bone material can be ablated in a particularly effective fashion.

Abstract: Devices and methods of modifying tissue for low profile and ultra profile rongeur devices to treat spinal tissue. These devices may include a curved or curveable distal region; the cutting member may be configured to operate in the curved region. Also described herein are tissue modification devices that may be flexible or bendable for positioning in the tissue (including the spinal region) but can be made rigid once in position, or otherwise fixed in place to allow leverage when modifying the tissue.

Abstract: A rongeur has an elongated shank having a distal end and a proximal end. An elongated crossbar, which moves between a retracted position and a tissue capturing position position, has a distal end and a proximal end and reciprocates axially with respect to the shank. A first tip is selectively connected to the shank. The first tip has a proximal end and a distal end. The proximal end has a reduced diameter post. In the selectively connected position, the reduced diameter post of the first tip is received in a bore of the shank. A second tip is selectively connected to the crossbar. The second tip has a proximal end and a distal end. The proximal end has a reduced diameter post. In the selectively connected position, the reduced diameter post of the second tip is received in a bore of the crossbar.

Abstract: A surgical instrument for removing bone, cartilage, or similar tissue is described. The surgical instrument has a shaft that extends in a longitudinal direction and supports a cutting plate which is inclined perpendicular or relative to the longitudinal direction, and a cutting element which is movably mounted on the shaft and supports a blade at the distal end in which the blade is pointing in the direction of the cutting plate and being advanced to the cutting plate in order to cut tissue.

Abstract: Described herein are tissue manipulation devices having a tight bipole network. In particular, described herein are smart tools such as rongeurs configured to sense the presence of a nerve or portion of nerve. Tissue may be cut (or otherwise manipulated) by using a tool having a tight bipolar network to sense when a nerve or portion of a nerve is in the tool prior to cutting. Also described are systems for determining if a nerve is nearby an insertable tool. These systems typically include a tool with a neurostimulation electrode, an accelerometer configured to detect muscle twitch, and a feedback controller to provide feedback indicating if the tool is near a nerve. Methods of controlling insertion of a tool using feedback from such a system are also described.

Abstract: A tissue removal device for removing hard and/or soft tissue is disclosed. The device can have an elongated rigid shaft attached to an articulating broach. The device can be inserted through a transosseous delivery channel formed in a bone. The broach can articulate after passing through the transosseous delivery channel.

Abstract: A rongeur comprising a bottom shaft comprising a proximal end, a distal end terminating in a footplate, a substantially flat upper surface extending along the bottom shaft, and a groove characterized by a wider proximal recess and a narrower distal recess comprising an undercut; a top shaft comprising a proximal end, a distal end, a substantially flat bottom surface extending along the top shaft, and a tongue characterized by a crossbar connected to the flat bottom surface by a vertical riser; wherein the flat bottom surface rests on the flat upper surface and the tongue is slidably disposed in the groove so that when the top shaft is moved distally relative to the bottom shaft, the tongue slides from the proximal recess into the distal recess; and further wherein the top shaft comprises a passageway for admitting air into the portion of the proximal recess vacated by the tongue.

Abstract: A rongeur including a shaft having a foot plate, a cutting slide, a breach extending between the foot plate and the cutting slide and a handle assembly for moving the cutting slide along the shaft. The cutting slide includes a pair of tracking arms arranged about a distal end of the cutting slide and a third tracking arm arranged about the proximal end thereof. The tracking arms are received within corresponding tracking slots in the shaft when the rongeur is in a closed position. The tracking arms are disengaged from the tracking slots by rotating the cutting slide about a pivot axis that extends parallel to the length of the shaft thereby placing the rongeur in an open position. To prevent inadvertent disengagement of the tracking arms from the tracking slots, a trigger assembly is provided which arrests proximal movement of the cutting slide.

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 surgical punch has a cartridge for collecting the resected chips cut off in successive punch cuts. The cartridge is a replaceable disposable commodity. The cartridge consists of a casing and a tooth rail which is guided longitudinally displaceable relative to the casing. Once the cartridge is inserted, the casing is fixed on the upper part of the punch, while the tooth rail is fixed on the lower part of the punch. A transport serration is formed in the casing. The tooth rail has a retaining serration. During the opening and closing movement of the punch, the transport serration and the retaining serration interact as transport mechanism which displaces the cut off resected chips in the cartridge in the proximal direction.

Abstract: Improved spinal instruments are provided. In particular, the present application relates to an improved rongeur that allows for multiple bites of bone to be performed in a patient before removing the rongeur from the patient. The rongeur includes a lower shaft and an upper shaft slidable relative to the lower shaft. The lower shaft and upper shaft form a jaw mechanism that can take multiple bites of bone, which can be deposited in a storage cavity formed in the upper shaft. To assist in removing the bone from within the storage cavity, an internal plunger mechanism can be provided that is actuated by a finger hold. In addition, at least portions of the upper shaft are detachable from the lower shaft such that the upper shaft can be thoroughly cleaned and re-used if desired.

Abstract: An instrument set and related method for preparing a proximal tibia during a bi-cruciate retaining procedure are disclosed. The instrument set can include a tibial resection block, a cut guide, and a locking arm. The tibial resection block can be configured to be fixed to an anterior portion of the proximal tibia. The tibial resection block can define a slot that extends in a medial-lateral direction when the tibial resection block is fixed to the proximal tibia. The cut guide can have a body, a medial arm, and a lateral arm. A medial cut slot can be defined between the body and the medial arm. A lateral cut slot can be defined between the body and the lateral arm. The cut guide can further comprise a tongue extending therefrom. The tongue can be configured to be received by and slidably translate along the slot of the tibial resection block.

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: A guide for positioning a femoral tunnel during an ACL repair. The device may include a shaft having a lumen, the lumen defining a longitudinal axis, and a distal offset projection, at least a portion of the distal offset projection extending distally from the elongated shaft, wherein the distal offset projection and the shaft are moveable relative to each other.

Abstract: A bone resection device for use in resection of bone during joint replacement surgery includes a handle, an elongate shaft rotatably mounted to the handle, a cutting tool housing attached to the shaft at or towards the distal end of the shaft, at least one cutting tool fastened to the housing, and a pivot control member configured to be at least partially disposed about the elongate shaft, the pivot control member being attached at or toward the distal end of the pivot control member to the at least one cutting tool, the distal end of the pivot control member and the distal end of the shaft being configured to be axially displaceable with respect to one another a predetermined distance, during operation of the device.

Abstract: An ultrasonic surgical instrument has an ultrasonic transducer unit having an ultrasonic transducer for producing ultrasonic vibration, a transmission member which connects the ultrasonic transducer in the proximal end side, and transmits the ultrasonic vibration produced by the ultrasonic transducer from the proximal end side to the distal end side, a sheath, in which the transmission member is inserted, having an open part on one side of the distal end side, and a treatment portion which is provided at the distal end of the transmission member, and exposed to the open part for carrying out a surgical treatment on an object part by the ultrasonic vibration transmitted from the transmission member. The ultrasonic surgical instrument cuts or shaves hard tissues.

Abstract: A tissue repair device. The tissue repair device includes a tubular shaft having a longitudinal bore for delivering biological material to a soft tissue defect, and an awl having a distal end configured for microfracturing bone underlying the defect. The tubular shaft and the awl are movable relative to one another such that the awl is at least partially positioned within the longitudinal bore of the tubular shaft.

Abstract: A cavity creator including a tube with a lumen. A tip able to penetrate bone extends forward from the distal end of the tube. A blade is moveably attached to the outer tube proximal to the tip so as to move between retracted and extended states. The tube has a discharge port adjacent the blade. The tip is used to position the upper tube in bone. The blade is extended to form a cavity in the bone. Once the cavity is created filler material can be introduced into the cavity by flowing the material through the tube lumen.

Abstract: An improved rongeur for cutting bone or cartilage comprising two shaft members capable of reciprocating motion relative to each other wherein one shaft member terminates in a foot plate and the other shaft member comprises a combined cutting element and storage member is disclosed. The combined cutting element and storage member has a cutting edge at its distal end and a storage chamber proximate the cutting edge for collecting and storing cut pieces of bone or cartilage in an amount greater than the maximum bone or cartilage capable of being cut in a single full cut. The combined cutting element and storage member is truly disposable, rather than merely replaceable and requires the use of no tools or special assembly. The rongeur may be manually activated or activated by a solenoid and powered by a battery.

Abstract: A device for sectioning a vertebral lamina, which can comprise a base for positioning the device and protecting the medullar canal when sectioning the lamina, sectioning means slide-mounted in the base along a first axis, a first piston slide-mounted in a sleeve of the sectioning means along a second axis secant to the first sliding axis of the sectioning means, a second piston made integral with the first piston and slide-mounted in the base along a third axis, the sectioning means being provided with a cutting element oriented in opposite direction to the second piston with respect to the sleeve, and the sliding of the second piston along the third axis causing the sliding of the sectioning means along the first axis via the first piston.

Abstract: A surgical instrument for removing bone, cartilage, or similar tissue is described. The surgical instrument has a shaft that extends in a longitudinal direction and supports a cutting plate which is inclined perpendicular or relative to the longitudinal direction, and a cutting element which is movably mounted on the shaft and supports a blade at the distal end in which the blade is pointing in the direction of the cutting plate and being advanced to the cutting plate in order to cut tissue.

Abstract: A surgical instrument having a shaft with a fixed handle part having a sliding part arranged thereon, and axially movable by means of a pivotable handle. The sliding part is guided on the shaft within an axial working stroke by proximal and distal guidance mechanism. A locking mechanism limit the axial displacement of the sliding part on the proximal end of the working stroke. In use, after unlocking the locking mechanism. the sliding part is movable beyond the proximal end of the working stroke into a cleaning position, in which the distal guidance mechanism are disengaged, so that the sliding part can be lifted away from the shaft.

Abstract: In a surgical bone punch having a stationary shaft joined to a handgrip, a slide shaft mounted for longitudinal displacement on this stationary shaft, and a motorized drive in the handgrip for displacement of the slide shaft from a proximal inoperative position to a distal operative position with a preset forward displacement force, in order to control the effective forward displacement force of the slide shaft, it is proposed that the slide shaft carry a stop, which, during displacement of the slide shaft to the operative position, strikes an elastic spring element, which is supported on the stationary shaft, and, during displacement of the slide shaft, counteracts the forward displacement force of the drive.

Abstract: A device for osteoligamentous resection comprising a resector having a shaft with a resecting tip at its distal end, and a retractor at least partially surrounding the resector, and at least part of the retractor being moveable relative to the resector.

Abstract: A tissue resection guide for use with a datum includes a base releasably engagable with the datum. The tissue resection guide has a first frame fixed relative to the base and the first frame has at least one integral first guide path that is sized and configured to at least partially capture and guide a first tissue resection tool relative to the first frame.

Abstract: Embodiments of the invention include an orthopedic milling machine for preparing a glenoid bone. The milling machine uses a hub and a sleeve. The hub includes reliefs arranged to cut or mill the bone and the sleeve couples to the hub to transfer rotational motion to the hub. The hub has an axial bore sized to receive an orthopedic guide pin. The hub also has a lateral passage slot that allows the hub to move laterally towards the guide pin in order to place the guide pin within the axial bore.

Abstract: Improved method for removing large amount of bone and articulate surface including cartilage comprising a bone chipper, which can be adapted for usage with any large articular surface or bony structure through a small incision using minimally invasive surgical approach. The inventive device includes an oscillating chipper tip having a series of metallic blades with sharp cutting edges vertically situated and attached to a metallic circular platform. Said platform is situated at the distal end of shank blade. The circular platform and cutting blade will oscillate horizontally driven by the reciprocating eccentric cam with his attached proximally to a reciprocating central shaft. Each of the vertical blades has two sharp vertical cutting edges. The blade shank contains a suction channel, which allows of the removal of bone particles and tissue debris generated by the cutting process. The electromagnetic driver comprises three or four electromagnetic coils placed in a collinear fashion and in series.