US20020099382A1 - Guide bushing for coring reamer, storage package for reamer assembly, and method of use - Google Patents
Guide bushing for coring reamer, storage package for reamer assembly, and method of use Download PDFInfo
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- US20020099382A1 US20020099382A1 US09/769,666 US76966601A US2002099382A1 US 20020099382 A1 US20020099382 A1 US 20020099382A1 US 76966601 A US76966601 A US 76966601A US 2002099382 A1 US2002099382 A1 US 2002099382A1
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- Prior art keywords
- reamer
- coring
- bushing
- coring reamer
- cap
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1637—Hollow drills or saws producing a curved cut, e.g. cylindrical
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B50/00—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers
- A61B50/30—Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B50/00—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers
- A61B2050/005—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers with a lid or cover
- A61B2050/0058—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers with a lid or cover closable by translation
- A61B2050/006—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers with a lid or cover closable by translation perpendicular to the lid plane, e.g. by a downward movement
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B50/00—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers
- A61B50/30—Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments
- A61B50/3001—Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments for sharps
Definitions
- the present invention relates to a coring reamer. More particularly, it refers to an improved guide bushing for a coring reamer, a storage package for a coring reamer assembly, and a method of using the coring reamer.
- the prior art it is well known to use a coring reamer to cut a cylindrical bone tunnel at a surgical site.
- the reamer is coupled to a handpiece that rotates the reamer to facilitate cutting a bone tunnel.
- the reamer has a cylindrical distal end with sharp teeth formed thereon.
- the guide pin has an enlarged collar that guides the reamer over its peripheral edges. This collar is fixedly mounted on the guide pin or integrally formed therewith and facilitates removing the core from the coring reamer.
- a prior U.S. Pat. No. 4,696,308 to Meller et al. shows a guide pin with a cylindrical bushing having a cylindrical exterior and a passage therethrough allowing it to be freely slidably mounted over a guide pin.
- a trephine instrument including a reamer with a blind passageway therethrough in which is freely slidably mounted a piston having enlarged distal and proximal flanges with the piston being spring biased into the distal direction.
- the piston is not easily removable from the trephine and the instrument is so designed that any bone core formed by the trephine can be removed by leaving the core attached at one end and pulling the instrument away so the core can be broken off at its distal end. None of this prior art has the advantages of the subject invention.
- the present invention relates to an improved guide bushing for a coring reamer, a storage package for the reamer assembly, and a method of using the coring reamer.
- the present invention includes the following interrelated objects, aspects and features:
- the present invention contemplates employing a coring reamer having a cylindrical passageway extending completely therethrough.
- the coring reamer has a proximal coupling enabling it to be coupled to an adapter which is coupled to a handpiece such as a drill or other instrument designed to impart rotary motion to the reamer.
- the distal end of the reamer includes a set of teeth surrounding the opening extending therethrough.
- the present invention further contemplates a guide bushing consisting of a tapered member having its largest diameter at its proximal end with respect to the reamer and wherein the guide bushing engages an internal cylindrical surface of the reamer with a line contact at its distal end.
- the guide bushing has a passage extending therethrough sized to slidably receive a guide pin.
- the guide bushing is pre-assembled with the coring reamer.
- a guide pin Prior to the reamer being employed, a guide pin is driven into a bone at the surgical site. The reamer/bushing assembly is slid over the guide pin into contact with the bone. Alternatively, if the bushing and reamer are not pre-assembled, the bushing is slid over the guide pin into contact with the bone and the reamer is advanced over the guide pin until the bushing has entered the distal end of the passageway through the reamer.
- the package includes a transparent tube having a closed distal end and an open proximal end, with the open proximal end being closable with a special cap having a central opening therethrough sized to receive, in coupling relation, the proximal coupling of the coring reamer.
- the proximal coupling of the coring reamer has a polygonal or other non-circular surface at one portion thereof that mimics a corresponding polygonal or other non-circular surface within the opening formed within the cap.
- the cap has an enlarged periphery allowing it to be gripped by the fingers of the surgeon or other person.
- the coring reamer is placed through the cap of the tube, with the adapter that coupled the coring reamer to the handpiece installed on the reamer and extending outside the package tube.
- a wrench is placed over the adapter and is turned while the user grips the peripheral surfaces of the cap to prevent rotation of the coring reamer, thereby allowing the adapter to be removed from the coring reamer.
- a plunger is inserted through the opening through the coring reamer from the proximal end thereof and is pushed therethrough until the bone core and bushing fall out of the distal end of the coring reamer and into the tube.
- the bone core may be removed and the coring reamer, bushing, tube and cap disposed of properly.
- the storage package can be used to initially couple the coring reamer/bushing assembly to the coupling adapter for assembly on to the handpiece.
- the package includes a cap having an enlarged periphery allowing the cap to be non-rotatably gripped by a surgeon to allow attachment and removal of a proximal adapter from the reamer.
- FIG. 1 shows an exploded perspective view of a coring reamer and a flared bushing in accordance with the teachings of the present invention.
- FIG. 2 shows a side perspective view of the bushing.
- FIG. 3 shows a side plan view of the bushing.
- FIG. 4 shows a side cross-sectional view of the bushing.
- FIG. 5 shows a perspective view of the coring reamer with the flared bushing in phantom within the distal end thereof.
- FIG. 6 shows a view similar to that of FIG. 5 but showing the coring reamer extended over a guide pin.
- FIG. 7 shows a view similar to that of FIG. 6 but depicting a longitudinal cross-section through the coring reamer so that one may view a bone core within the coring reamer that has pushed the flared bushing in the proximal direction.
- FIG. 8 shows a side perspective view of a package used to store the reamer assembly and facilitate removal of the bone core therefrom.
- FIG. 9 shows a further perspective view with the coring reamer being placed within the package.
- FIG. 10 shows a further view with the coring reamer placed within the package.
- FIG. 11 shows a view similar to that of FIG. 10 but with the adapter assembly used to couple the coring reamer to a handpiece shown in its installed position.
- FIG. 12 shows a wrench employed to attach and remove the adapter from the coring reamer.
- FIG. 13 shows a perspective view depicting the use of a plunger to push a bone core and the flared bushing from within the coring reamer.
- FIG. 14 shows a perspective view similar to that of FIG. 13 but with the plunger fully inserted within the coring reamer and the bone core and flared bushing removed therefrom.
- a coring reamer is generally designated by the reference numeral 10 and is seen to include an elongated cylindrical tube 11 having an open distal end 13 surrounded by peripheral teeth 15 .
- a cylindrical passageway 17 extends completely through the reamer 10 .
- the reamer 10 includes a proximal end 19 consisting of a coupling 21 designed to couple the reamer 10 to an adapter 23 (FIG. 11) designed to couple the reamer 10 to a handpiece (not shown) adapted to rotate the reamer 10 in a manner well known to those skilled in the art.
- the proximal coupling 21 includes a distal portion 25 having a hexagonal periphery and a proximal portion 27 having a cylindrical periphery.
- the interface between the adapter 23 and the proximal coupling 21 consists of a threaded interconnection (not shown).
- a flared bushing is generally designated by the reference numeral 30 and is seen to include an outer wall 31 that is tapered from its widest dimension 33 (see FIG. 4) at the proximal end thereof to its narrowest dimension 35 (see FIG. 4) at its distal ends Dimension 35 is approximately equal to the cross-section of the passageway 17 to act as a centering device.
- a plurality of slots 37 are provided extending distally from the proximal end 33 and a conical surface 39 defines the most proximal portion of a passage 38 extending centrally through the bushing 30 .
- the conical surface 39 is a “lead-in” which facilitates alignment of plunger 80 with bushing 30 as will be understood below with reference to FIG. 13.
- the diameter of the outer wall 31 at the proximal end 33 of the bushing 30 is sized to facilitate slidable receipt of the bushing 30 within the passageway 17 through the reamer 10 in such a manner that the end 33 of the bushing 30 frictionally engages the passageway 17 of the reamer 10 with a line contact.
- the longitudinal axis 32 (FIG. 3) of the bushing 30 is aligned with the longitudinal axis of the reamer 10 , only the end 33 of the bushing 30 engages the inner walls of the passageway 17 of the reamer 10 .
- the guide pin 40 is driven into a bone surface at the surgical site where the surgeon desires to create a bone tunnel.
- the bushing 30 is slidably received over the guide pin 40 and the reamer 10 is advanced over the guide pin 40 until the bushing 30 is inserted just within the distal end thereof as seen in FIG. 6.
- the reamer 10 is advanced in the distal direction of the guide pin 40 until the teeth 15 of the reamer 10 engage the surface of the bone where the tunnel is to be created.
- the bushing is pre-assembled with the reamer and is shipped to the user in this configuration.
- the handpiece (not shown) is then activated and the surgeon advances the reamer 10 in the distal direction to cause a bone tunnel to be created in the bone (not shown).
- the reamer 10 advances in the distal direction relative to the bushing 30 as seen in FIG. 7.
- the bone core 1 created through action of the reamer 10 advancing in the distal direction occupies the passageway 17 of the reamer 10 , the bone core thereby pushing the bushing 30 in the proximal direction as shown in FIG. 7.
- the line contact between the proximal end 33 of the bushing 30 and the walls of the passageway 17 create a minimal amount of frictional interaction therebetween, thereby requiring the surgeon to use a minimal amount of force necessary to advance the reamer 10 within the bone tissue to cut the tunnel therewithin.
- the pin 40 is removed from the bone with the coring reamer 10 attached thereto. Thereafter, the pin 40 is pulled out from the reamer 10 leaving the reamer 10 with the bone core 1 and the bushing 30 captured therewithin.
- the package described hereinabove is employed. (As will be understood below, the package is used in the preferred embodiment to ship the reamer/bushing assembly and attach it to the handpiece.)
- the package for the coring reamer is generally designated by the reference numeral 50 and is seen to include a transparent tube 51 having a closed distal end 53 and an open proximal end 55 closable by a cap 57 having a distal cylindrical portion 59 receivable within the open end 55 , and a proximal gripping portion 61 having an enlarged periphery with a plurality of concavities 63 in the preferred embodiment for best facilitating gripping of the gripping portion by the fingers of the user for a purpose to be described in greater detail hereinafter.
- the cap 57 has an opening 69 therethrough which, at least at the proximal end thereof, has a hexagonal configuration 65 sized and configured to receive the distal hexagonal portion 25 of the proximal coupling 21 of the coring reamer 10 for a purpose to be described in greater detail hereinafter. Opening 69 is tapered distally to provide a friction fit to hold the reamer 10 during shipment.
- the coring reamer 10 when viewed together, the coring reamer 10 is received within the opening 69 of the cap 57 but with the distal hexagonal portion 25 of the proximal coupling 21 thereof received within the hexagonal configuration 65 in the cap 57 .
- the coring reamer 10 containing bushing 30 is non-rotatably received within the opening 69 of the cap 57 and suspended in tube 51 in a cantilevered manner.
- the coring reamer 10 is seen with the adapter 23 threadably coupled thereto, which adapter 23 is adapted to couple the coring reamer 10 to a handpiece (not shown) in a manner well known to those skilled in the art.
- the configuration of FIG. 11 represents two situations: (1) the initial joining of the adapter to the reamer/bushing/package assembly prior to attachment of the adapter to a handpiece, and (2) the post-tunnel-formation configuration in which the reamer/bushing/bone/adapter assembly (after disconnection from the handpiece)is placed in the package for further disassembly.
- the package 50 is removed.
- a wrench 70 has an elongated shape with a central hexagonal opening 71 sized to couple to a hexagonal portion 24 of the adapter 23 .
- the user may grip the concave portions 63 of the cap 57 to thereby fix the rotative position of the coring reamer 10 , whereupon the wrench 70 may be rotated to attach or remove the adapter 23 from the coring reamer 10 , as needed.
- a plunger 80 may be used to remove the bone core 1 and the bushing 30 from within the reamer 10 .
- the plunger 80 includes an elongated stem 81 and a proximal gripping portion 83 (FIGS. 13 and 14).
- the plunger 80 is inserted through the proximal end of the reamer assembly as shown in FIG. 13 and is advanced in the distal direction through the passageway 17 of the coring reamer 10 to engage bushing 30 (as facilitated by “lead-in” 39 ) to push the bone core 1 and the flared bushing 30 from the distal end of the reamer 10 .
- the “lead-in” surface 39 centers the pushing force relative to the bone core. This is depicted in FIG. 14 which shows the bone core 1 and the bushing 30 captured within the tube 51 .
- the plunger 80 may then be pulled proximally from the coring reamer 10 and the coring reamer 10 , bushing 30 and bone core 1 all remain stored within the tube 51 until the core is ready for use.
- the pin 40 is driven into a bone tissue (not shown).
- the coring reamer 10 is coupled to a handpiece via an adapter 23 (FIG. 11) and the handpiece is activated rotating the reamer so that, while guided by the guide pin 40 and the bushing 30 , a tunnel is created within the bone tissue with a bone core being generated and received within the passageway 17 through the coring reamer 10 as the reamer 10 advances into the bone tissue (FIG. 7).
- the pin 40 and the reamer 10 including the bone core 1 and the flared bushing 30 are removed from the bone tissue.
- the pin 40 is removed from the reamer 10 and the reamer 10 is installed in the package through the opening 69 within the cap 57 of the package assembly 50 .
- the wrench 70 is used to remove the adapter 23 from the coring reamer 10 while the user grips the surfaces 63 of the cap 57 of the package assembly 50 .
- the plunger 80 is inserted through the proximal end of the coring reamer 10 and is advanced through the passageway 17 removing the bone core 1 and the bushing 30 from the distal end thereof.
- package assembly 50 also can be used to ship and store the coring reamer and bushing prior to use. If so, adapter 23 is applied to the coring reamer 10 by wrench 70 as shown in FIGS. 11 and 12. After use, the coring reamer, bushing and bone core are returned to the same package for disassembly.
- the reamer, bushing and package are intended to be disposable.
- the reamer and bushing are preassembled and shipped within the package. Therefore, the user simply needs to attach the adapter to the proximal end of the reamer and attach the entire assembly (adapter, reamer, bushing and package) onto the handpiece, and then the package may be removed. This prevents anyone from having to touch the reamer and also prevents the reamer from being accidentally dropped or nicked or otherwise detrimentally affected.
- Prepackaging of the bushing within the reamer is done with a fixture (not shown) which squeezes the proximal end 33 of the bushing. This prevents the reamer from scraping the surface of the bushing which might create particulate matter. Shipping the bushing within the reamer prevents the user from ever having to assemble these pieces.
Abstract
Description
- The present invention relates to a coring reamer. More particularly, it refers to an improved guide bushing for a coring reamer, a storage package for a coring reamer assembly, and a method of using the coring reamer.
- In the prior art, it is well known to use a coring reamer to cut a cylindrical bone tunnel at a surgical site. The reamer is coupled to a handpiece that rotates the reamer to facilitate cutting a bone tunnel. For this purpose, the reamer has a cylindrical distal end with sharp teeth formed thereon.
- It is also well known to guide such a reamer by employing a guide pin separately and previously driven into or through the bone at the surgical site. As the reamer cuts the bone tunnel, the reamer slides over the guide pin to guide its motion. While the prior art contemplates an interface between the guide pin and the reamer, one aspect of the present invention proposes an improvement thereover.
- In U.S. Pat. No. 5,423,823 to Schmieding, the guide pin has an enlarged collar that guides the reamer over its peripheral edges. This collar is fixedly mounted on the guide pin or integrally formed therewith and facilitates removing the core from the coring reamer. A prior U.S. Pat. No. 4,696,308 to Meller et al. shows a guide pin with a cylindrical bushing having a cylindrical exterior and a passage therethrough allowing it to be freely slidably mounted over a guide pin. U.S. Pat. No. 5,197,967 to Wilson teaches a trephine instrument including a reamer with a blind passageway therethrough in which is freely slidably mounted a piston having enlarged distal and proximal flanges with the piston being spring biased into the distal direction. The piston is not easily removable from the trephine and the instrument is so designed that any bone core formed by the trephine can be removed by leaving the core attached at one end and pulling the instrument away so the core can be broken off at its distal end. None of this prior art has the advantages of the subject invention.
- Applicants are aware of no known prior art relating to handling a reamed bone core other than simply pushing/pulling it out of a reamer onto a surface. Also applicants are not aware of any prior related to packaging suitable for storing coring reamers and usable thereafter to facilitate removal of a bone core from the reamer.
- The present invention relates to an improved guide bushing for a coring reamer, a storage package for the reamer assembly, and a method of using the coring reamer. The present invention includes the following interrelated objects, aspects and features:
- (1) In a first aspect, the present invention contemplates employing a coring reamer having a cylindrical passageway extending completely therethrough. The coring reamer has a proximal coupling enabling it to be coupled to an adapter which is coupled to a handpiece such as a drill or other instrument designed to impart rotary motion to the reamer. The distal end of the reamer includes a set of teeth surrounding the opening extending therethrough.
- (2) The present invention further contemplates a guide bushing consisting of a tapered member having its largest diameter at its proximal end with respect to the reamer and wherein the guide bushing engages an internal cylindrical surface of the reamer with a line contact at its distal end. The guide bushing has a passage extending therethrough sized to slidably receive a guide pin. In a preferred embodiment, the guide bushing is pre-assembled with the coring reamer.
- (3) Prior to the reamer being employed, a guide pin is driven into a bone at the surgical site. The reamer/bushing assembly is slid over the guide pin into contact with the bone. Alternatively, if the bushing and reamer are not pre-assembled, the bushing is slid over the guide pin into contact with the bone and the reamer is advanced over the guide pin until the bushing has entered the distal end of the passageway through the reamer.
- (4) The handpiece is activated, causing the reamer to rotate, and the surgeon applies a forward pushing force in the distal direction, thereby causing the reamer to excavate a tunnel in the bone. As this excavation takes place, the bushing advances proximally within the reamer while the excavated bone enters the passageway through the reamer with the bone material engaging the distal surface of the bushing throughout the procedure.
- (5) Once the tunnel has been formed through the bone, the guide pin, with the reamer attached and with the excavated bone material within the reamer, is removed from the surgical site. A storage package specifically designed for the storing and shipping of the reamer/bushing assembly and, in the preferred embodiment, attaching it to a handpiece is employed to remove the excavated bone core from within the reamer.
- (6) The package includes a transparent tube having a closed distal end and an open proximal end, with the open proximal end being closable with a special cap having a central opening therethrough sized to receive, in coupling relation, the proximal coupling of the coring reamer. The proximal coupling of the coring reamer has a polygonal or other non-circular surface at one portion thereof that mimics a corresponding polygonal or other non-circular surface within the opening formed within the cap. The cap has an enlarged periphery allowing it to be gripped by the fingers of the surgeon or other person.
- (7) After the tunnel has been formed, the coring reamer is placed through the cap of the tube, with the adapter that coupled the coring reamer to the handpiece installed on the reamer and extending outside the package tube. A wrench is placed over the adapter and is turned while the user grips the peripheral surfaces of the cap to prevent rotation of the coring reamer, thereby allowing the adapter to be removed from the coring reamer. Thereafter, a plunger is inserted through the opening through the coring reamer from the proximal end thereof and is pushed therethrough until the bone core and bushing fall out of the distal end of the coring reamer and into the tube. Thereafter, the bone core may be removed and the coring reamer, bushing, tube and cap disposed of properly. It should be noted that the storage package can be used to initially couple the coring reamer/bushing assembly to the coupling adapter for assembly on to the handpiece.
- As such, it is a first object of the present invention to provide an improved guide bushing for a coring reamer, a storage package for the reamer assembly, and method of using these elements in performing surgery.
- It is a further object of the present invention to provide such a device in which the guide bushing engages an inner cylindrical passageway through the coring reamer with a line contact to reduce frictional interaction therebetween.
- It is a further object of the present invention to provide such a device wherein the guide bushing includes an internal passageway sized to slidably mount the guide bushing over a guide pin.
- It is a still further object of the present invention to provide such a device wherein a package is provided to ship the reamer and bushing assembly to the user. Such package also is used to facilitate removal of a bone core therefrom after the reamer assembly has been used.
- It is a still further object of the present invention to provide such a device wherein the package includes a cap having an enlarged periphery allowing the cap to be non-rotatably gripped by a surgeon to allow attachment and removal of a proximal adapter from the reamer.
- It is a still further object of the present invention to provide such a device including a plunger sized and configured to slide though the opening through the reamer to allow removal of a bone core and the guide bushing after the reamer has been used
- These and other objects, aspects and features of the present invention will be better understood from the following detailed description of the preferred embodiments when read in conjunction with the appended drawing figures.
- FIG. 1 shows an exploded perspective view of a coring reamer and a flared bushing in accordance with the teachings of the present invention.
- FIG. 2 shows a side perspective view of the bushing.
- FIG. 3 shows a side plan view of the bushing.
- FIG. 4 shows a side cross-sectional view of the bushing.
- FIG. 5 shows a perspective view of the coring reamer with the flared bushing in phantom within the distal end thereof.
- FIG. 6 shows a view similar to that of FIG. 5 but showing the coring reamer extended over a guide pin.
- FIG. 7 shows a view similar to that of FIG. 6 but depicting a longitudinal cross-section through the coring reamer so that one may view a bone core within the coring reamer that has pushed the flared bushing in the proximal direction.
- FIG. 8 shows a side perspective view of a package used to store the reamer assembly and facilitate removal of the bone core therefrom.
- FIG. 9 shows a further perspective view with the coring reamer being placed within the package.
- FIG. 10 shows a further view with the coring reamer placed within the package.
- FIG. 11 shows a view similar to that of FIG. 10 but with the adapter assembly used to couple the coring reamer to a handpiece shown in its installed position.
- FIG. 12 shows a wrench employed to attach and remove the adapter from the coring reamer.
- FIG. 13 shows a perspective view depicting the use of a plunger to push a bone core and the flared bushing from within the coring reamer.
- FIG. 14 shows a perspective view similar to that of FIG. 13 but with the plunger fully inserted within the coring reamer and the bone core and flared bushing removed therefrom.
- With reference, first, to FIGS.1-6, a coring reamer is generally designated by the
reference numeral 10 and is seen to include an elongatedcylindrical tube 11 having an opendistal end 13 surrounded byperipheral teeth 15. A cylindrical passageway 17 (FIG. 7) extends completely through thereamer 10. - With further reference to FIGS.1-6, the
reamer 10 includes aproximal end 19 consisting of acoupling 21 designed to couple thereamer 10 to an adapter 23 (FIG. 11) designed to couple thereamer 10 to a handpiece (not shown) adapted to rotate thereamer 10 in a manner well known to those skilled in the art. Theproximal coupling 21 includes adistal portion 25 having a hexagonal periphery and aproximal portion 27 having a cylindrical periphery. The interface between theadapter 23 and theproximal coupling 21 consists of a threaded interconnection (not shown). - With particular reference to FIGS.1-4, a flared bushing is generally designated by the
reference numeral 30 and is seen to include anouter wall 31 that is tapered from its widest dimension 33 (see FIG. 4) at the proximal end thereof to its narrowest dimension 35 (see FIG. 4) at itsdistal ends Dimension 35 is approximately equal to the cross-section of thepassageway 17 to act as a centering device. With reference to FIG. 2, a plurality ofslots 37 are provided extending distally from theproximal end 33 and aconical surface 39 defines the most proximal portion of apassage 38 extending centrally through thebushing 30. Theconical surface 39 is a “lead-in” which facilitates alignment ofplunger 80 withbushing 30 as will be understood below with reference to FIG. 13. The diameter of theouter wall 31 at theproximal end 33 of thebushing 30 is sized to facilitate slidable receipt of thebushing 30 within thepassageway 17 through thereamer 10 in such a manner that theend 33 of thebushing 30 frictionally engages thepassageway 17 of thereamer 10 with a line contact. When the longitudinal axis 32 (FIG. 3) of thebushing 30 is aligned with the longitudinal axis of thereamer 10, only theend 33 of thebushing 30 engages the inner walls of thepassageway 17 of thereamer 10. - With particular reference to FIGS. 6 and 7, as understood by those skilled in the art, the
guide pin 40 is driven into a bone surface at the surgical site where the surgeon desires to create a bone tunnel. Thebushing 30 is slidably received over theguide pin 40 and thereamer 10 is advanced over theguide pin 40 until thebushing 30 is inserted just within the distal end thereof as seen in FIG. 6. In this configuration, thereamer 10 is advanced in the distal direction of theguide pin 40 until theteeth 15 of thereamer 10 engage the surface of the bone where the tunnel is to be created. In the preferred embodiment, the bushing is pre-assembled with the reamer and is shipped to the user in this configuration. - The handpiece (not shown) is then activated and the surgeon advances the
reamer 10 in the distal direction to cause a bone tunnel to be created in the bone (not shown). As this process is taking place, thereamer 10 advances in the distal direction relative to thebushing 30 as seen in FIG. 7. The bone core 1 created through action of thereamer 10 advancing in the distal direction occupies thepassageway 17 of thereamer 10, the bone core thereby pushing thebushing 30 in the proximal direction as shown in FIG. 7. The line contact between theproximal end 33 of thebushing 30 and the walls of thepassageway 17 create a minimal amount of frictional interaction therebetween, thereby requiring the surgeon to use a minimal amount of force necessary to advance thereamer 10 within the bone tissue to cut the tunnel therewithin. - Once the tunnel has been created through the bone, the
pin 40 is removed from the bone with thecoring reamer 10 attached thereto. Thereafter, thepin 40 is pulled out from thereamer 10 leaving thereamer 10 with the bone core 1 and thebushing 30 captured therewithin. At this point, the package described hereinabove is employed. (As will be understood below, the package is used in the preferred embodiment to ship the reamer/bushing assembly and attach it to the handpiece.) - With reference, now, to FIGS.8-14, the package for the coring reamer is generally designated by the
reference numeral 50 and is seen to include atransparent tube 51 having a closeddistal end 53 and an openproximal end 55 closable by acap 57 having a distalcylindrical portion 59 receivable within theopen end 55, and a proximal grippingportion 61 having an enlarged periphery with a plurality ofconcavities 63 in the preferred embodiment for best facilitating gripping of the gripping portion by the fingers of the user for a purpose to be described in greater detail hereinafter. - With reference to FIGS. 8 and 9, in particular, the
cap 57 has anopening 69 therethrough which, at least at the proximal end thereof, has ahexagonal configuration 65 sized and configured to receive the distalhexagonal portion 25 of theproximal coupling 21 of thecoring reamer 10 for a purpose to be described in greater detail hereinafter.Opening 69 is tapered distally to provide a friction fit to hold thereamer 10 during shipment. - As seen in FIGS. 9 and 10, when viewed together, the
coring reamer 10 is received within theopening 69 of thecap 57 but with the distalhexagonal portion 25 of theproximal coupling 21 thereof received within thehexagonal configuration 65 in thecap 57. In this way, thecoring reamer 10 containingbushing 30, is non-rotatably received within theopening 69 of thecap 57 and suspended intube 51 in a cantilevered manner. - With reference to FIG. 11, the
coring reamer 10 is seen with theadapter 23 threadably coupled thereto, whichadapter 23 is adapted to couple thecoring reamer 10 to a handpiece (not shown) in a manner well known to those skilled in the art. The configuration of FIG. 11 represents two situations: (1) the initial joining of the adapter to the reamer/bushing/package assembly prior to attachment of the adapter to a handpiece, and (2) the post-tunnel-formation configuration in which the reamer/bushing/bone/adapter assembly (after disconnection from the handpiece)is placed in the package for further disassembly. In the former situation, when theadapter 23 andreamer 10 are coupled to the handpiece, thepackage 50 is removed. With reference to FIG. 12, awrench 70 has an elongated shape with a centralhexagonal opening 71 sized to couple to ahexagonal portion 24 of theadapter 23. Thus, it should be understood that with thecoring reamer 10 non-rotatably received within thecap 57, the user may grip theconcave portions 63 of thecap 57 to thereby fix the rotative position of thecoring reamer 10, whereupon thewrench 70 may be rotated to attach or remove theadapter 23 from thecoring reamer 10, as needed. - With the
coring reamer 10 freed of theadapter 23, as depicted in FIGS. 9, 10, 13 and 14, aplunger 80 may be used to remove the bone core 1 and thebushing 30 from within thereamer 10. Theplunger 80 includes anelongated stem 81 and a proximal gripping portion 83 (FIGS. 13 and 14). Theplunger 80 is inserted through the proximal end of the reamer assembly as shown in FIG. 13 and is advanced in the distal direction through thepassageway 17 of thecoring reamer 10 to engage bushing 30 (as facilitated by “lead-in” 39) to push the bone core 1 and the flaredbushing 30 from the distal end of thereamer 10. The “lead-in”surface 39 centers the pushing force relative to the bone core. This is depicted in FIG. 14 which shows the bone core 1 and thebushing 30 captured within thetube 51. Theplunger 80 may then be pulled proximally from thecoring reamer 10 and thecoring reamer 10,bushing 30 and bone core 1 all remain stored within thetube 51 until the core is ready for use. - With the above description of the
coring reamer 10 and thepackage 50 having been described in detail, the method of practicing the present invention should be self-evident. - In summary, the following steps are employed:
- (1) The
pin 40 is driven into a bone tissue (not shown). - (2) Thereafter, the reamer/bushing assembly is advanced over the guide pin, or alternatively, the
bushing 30 is advanced over thepin 40 and thecoring reamer 10 is advanced over the pin until thebushing 30 is received within the distal end of the reamer 10 (FIGS. 5 and 6). - (3) Thereafter, the
coring reamer 10 is coupled to a handpiece via an adapter 23 (FIG. 11) and the handpiece is activated rotating the reamer so that, while guided by theguide pin 40 and thebushing 30, a tunnel is created within the bone tissue with a bone core being generated and received within thepassageway 17 through thecoring reamer 10 as thereamer 10 advances into the bone tissue (FIG. 7). - (4) Once the bone tunnel has been created, the
pin 40 and thereamer 10 including the bone core 1 and the flaredbushing 30 are removed from the bone tissue. Thepin 40 is removed from thereamer 10 and thereamer 10 is installed in the package through theopening 69 within thecap 57 of thepackage assembly 50. - (5) The
wrench 70 is used to remove theadapter 23 from thecoring reamer 10 while the user grips thesurfaces 63 of thecap 57 of thepackage assembly 50. - (6) Thereafter, the
plunger 80 is inserted through the proximal end of thecoring reamer 10 and is advanced through thepassageway 17 removing the bone core 1 and thebushing 30 from the distal end thereof. - (7) Thereafter, the
coring reamer 10, thebushing 30 andpackage 50 may be disposed of properly while bone core may be used as desired. - As mentioned above,
package assembly 50 also can be used to ship and store the coring reamer and bushing prior to use. If so,adapter 23 is applied to thecoring reamer 10 bywrench 70 as shown in FIGS. 11 and 12. After use, the coring reamer, bushing and bone core are returned to the same package for disassembly. - The reamer, bushing and package are intended to be disposable. The reamer and bushing are preassembled and shipped within the package. Therefore, the user simply needs to attach the adapter to the proximal end of the reamer and attach the entire assembly (adapter, reamer, bushing and package) onto the handpiece, and then the package may be removed. This prevents anyone from having to touch the reamer and also prevents the reamer from being accidentally dropped or nicked or otherwise detrimentally affected. Prepackaging of the bushing within the reamer is done with a fixture (not shown) which squeezes the
proximal end 33 of the bushing. This prevents the reamer from scraping the surface of the bushing which might create particulate matter. Shipping the bushing within the reamer prevents the user from ever having to assemble these pieces. - An invention has been disclosed in terms of apparatuses and process for their practice which fulfill each and every one of the objects of the invention as set forth hereinabove, and provide a new and useful guide bushing for coring reamer, storage package for reamer assembly, and method of using, of great novelty and utility.
- Of course, various changes, modifications and alterations in the teachings of the present invention may be contemplated by those skilled in the art without departing from the intended spirit and scope thereof.
- As such, it is intended that the present invention only be limited by the terms of the appended claims.
Claims (24)
Priority Applications (3)
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US09/769,666 US6451023B1 (en) | 2001-01-25 | 2001-01-25 | Guide bushing for coring reamer, storage package for reamer assembly, and method of use |
US10/104,577 US6857520B2 (en) | 2001-01-25 | 2002-03-22 | Storage package for coring reamer assembly |
US10/988,238 US7537597B2 (en) | 2001-01-25 | 2004-11-12 | Storage package for coring reamer assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US09/769,666 US6451023B1 (en) | 2001-01-25 | 2001-01-25 | Guide bushing for coring reamer, storage package for reamer assembly, and method of use |
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US10/104,577 Division US6857520B2 (en) | 2001-01-25 | 2002-03-22 | Storage package for coring reamer assembly |
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US10/104,577 Expired - Lifetime US6857520B2 (en) | 2001-01-25 | 2002-03-22 | Storage package for coring reamer assembly |
US10/988,238 Expired - Fee Related US7537597B2 (en) | 2001-01-25 | 2004-11-12 | Storage package for coring reamer assembly |
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US10/988,238 Expired - Fee Related US7537597B2 (en) | 2001-01-25 | 2004-11-12 | Storage package for coring reamer assembly |
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US8641718B2 (en) | 2010-10-19 | 2014-02-04 | Biomet Manufacturing, Llc | Method and apparatus for harvesting cartilage for treatment of a cartilage defect |
CN103841920A (en) * | 2011-03-11 | 2014-06-04 | 史密夫和内修有限公司 | Trephine |
US9901355B2 (en) | 2011-03-11 | 2018-02-27 | Smith & Nephew, Inc. | Trephine |
JP2014515634A (en) * | 2011-03-11 | 2014-07-03 | スミス アンド ネフュー インコーポレーテッド | Trephine |
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US9924934B2 (en) | 2011-06-07 | 2018-03-27 | Smith & Nephew, Inc. | Surgical anchor delivery system |
US9788828B2 (en) | 2013-03-15 | 2017-10-17 | Smith & Nephew, Inc. | Miniaturized dual drive open architecture suture anchor |
US9155531B2 (en) | 2013-03-15 | 2015-10-13 | Smith & Nephew, Inc. | Miniaturized dual drive open architecture suture anchor |
US9808298B2 (en) | 2013-04-09 | 2017-11-07 | Smith & Nephew, Inc. | Open-architecture interference screw |
CN106137446A (en) * | 2016-08-01 | 2016-11-23 | 四川省草原科学研究院 | A kind of Medulla caprae seuovis Echinococcus hydatid cyst skull perforator |
US11523834B1 (en) | 2022-06-20 | 2022-12-13 | University Of Utah Research Foundation | Cartilage and bone harvest and delivery system and methods |
US11660194B1 (en) | 2022-06-20 | 2023-05-30 | University Of Utah Research Foundation | Cartilage and bone harvest and delivery system and methods |
Also Published As
Publication number | Publication date |
---|---|
US20020099383A1 (en) | 2002-07-25 |
US6451023B1 (en) | 2002-09-17 |
US6857520B2 (en) | 2005-02-22 |
US7537597B2 (en) | 2009-05-26 |
US20050090830A1 (en) | 2005-04-28 |
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