Patents Assigned to Orthopaedic Hospital
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Publication number: 20230218299Abstract: Disclosed are a lead method of suturing an acutely ruptured Achilles tendon and a device used in it. The suturing device includes a suture line, guide lines, a clamping instrument and suture needles. As performing suturing, the clamping instrument is inserted into the fascia sheath of Achilles tendon to clamp Achilles tendon, the suture line and the guide lines are made to penetrate Achilles tendon and skin through the threading hole on the clamping instrument by the suture needle, wherein the suture line is located far away from Achilles tendon rupture; the guide lines are used to guide the suture line, so that both ends of the suture line can penetrate Achilles tendon in turn along the guide lines, and the suture line is tightened and knotted on the two ruptured Achilles tendons.Type: ApplicationFiled: April 21, 2022Publication date: July 13, 2023Applicant: ZHENGZHOU ORTHOPAEDICS HOSPITALInventor: Changsong CAO
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Patent number: 9302028Abstract: The present invention presents methods for making oxidation-resistant and wear-resistant polyethylenes and medical implants made therefrom. Preferably, the implants are components of prosthetic joints, e.g., a bearing component of an artificial hip or knee joint. The resulting oxidation-resistant and wear-resistant polyethylenes and implants are also disclosed.Type: GrantFiled: April 25, 2014Date of Patent: April 5, 2016Assignee: ORTHOPAEDIC HOSPITALInventors: Harry A. McKellop, Fu-Wen Shen
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Patent number: 9242025Abstract: The present invention presents methods for making oxidation-resistant and wear-resistant polyethylenes and medical implants made therefrom. Preferably, the implants are components of prosthetic joints, e.g., a bearing component of an artificial hip or knee joint. The resulting oxidation-resistant and wear-resistant polyethylenes and implants are also disclosed.Type: GrantFiled: September 17, 2014Date of Patent: January 26, 2016Assignee: ORTHOPAEDIC HOSPITALInventors: Harry A. McKellop, Fu-Wen Shen
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Patent number: 9155817Abstract: The present invention presents methods for making oxidation-resistant and wear-resistant polyethylenes and medical implants made therefrom. Preferably, the implants are components of prosthetic joints, e.g., a bearing component of an artificial hip or knee joint. The resulting oxidation-resistant and wear-resistant polyethylenes and implants are also disclosed.Type: GrantFiled: December 10, 2014Date of Patent: October 13, 2015Assignee: Orthopaedic HospitalInventors: Harry A. McKellop, Fu-Wen Shen
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Patent number: 8796347Abstract: The present invention presents methods for making oxidation-resistant and wear-resistant polyethylenes and medical implants made therefrom. Preferably, the implants are components of prosthetic joints, e.g., a bearing component of an artificial hip or knee joint. The resulting oxidation-resistant and wear-resistant polyethylenes and implants are also disclosed.Type: GrantFiled: April 27, 2001Date of Patent: August 5, 2014Assignee: Orthopaedic HospitalInventors: Harry A. McKellop, Fu-Wen Shen
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Patent number: 8658710Abstract: The present invention presents methods for making oxidation-resistant and wear-resistant polyethylenes and medical implants made therefrom. Preferably, the implants are components of prosthetic joints, e.g., a bearing component of an artificial hip or knee joint. The resulting oxidation-resistant and wear-resistant polyethylenes and implants are also disclosed.Type: GrantFiled: May 24, 2007Date of Patent: February 25, 2014Assignee: Orthopaedic HospitalInventors: Harry A. McKellop, Fu-Wen Shen
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Patent number: 8008365Abstract: The present invention discloses methods for enhancing the wear-resistance of polymers, the resulting polymers, and in vivo implants made from such polymers. One aspect of this invention presents a method whereby a polymer is irradiated, preferably with gamma radiation, then thermally treated, such as by remelting of annealing. The resulting polymeric composition preferably has its most oxidized surface layer removed. Another aspect of the invention presents a general method for optimizing the wear resistance and desirable physical and/or chemical properties of a polymer by crosslinking and thermally treating it. The resulting polymeric compositions is wear-resistant and may be fabricated into an in vivo implant.Type: GrantFiled: December 4, 2006Date of Patent: August 30, 2011Assignee: Orthopaedic HospitalInventors: Fu-Wen Shen, Harry A. McKellop, Ronald Salovey
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Patent number: 8003709Abstract: The present invention discloses methods for enhancing the wear-resistance of polymers, the resulting polymers, and in vivo implants made from such polymers. One aspect of this invention presents a method whereby a polymer is irradiated, preferably with gamma radiation, then thermally treated, such as by remelting of annealing. The resulting polymeric composition preferably has its most oxidized surface layer removed. Another aspect of the invention presents a general method for optimizing the wear resistance and desirable physical and/or chemical properties of a polymer by crosslinking and thermally treating it. The resulting polymeric compositions is wear-resistant and may be fabricated into an in vivo implant.Type: GrantFiled: December 4, 2006Date of Patent: August 23, 2011Assignee: Orthopaedic HospitalInventors: Fu-Wen Shen, Harry A. McKellop, Ronald Salovey
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Patent number: 6800670Abstract: The present invention discloses methods for enhancing the wear-resistance of polymers, the resulting polymers, and in vivo implants made from such polymers. One aspect of this invention presents a method whereby a polymer is irradiated, preferably with gamma radiation, then thermally treated, such as by remelting of annealing. The resulting polymeric composition preferably has its most oxidized surface layer removed. Another aspect of the invention presents a general method for optimizing the wear resistance and desirable physical and/or chemical properties of a polymer by crosslinking and thermally treating it. The resulting polymeric compositions is wear-resistant and may be fabricated into an in vivo implant.Type: GrantFiled: February 26, 2001Date of Patent: October 5, 2004Assignees: Orthopaedic Hospital, University of Southern CaliforniaInventors: Fu-Wen Shen, Harry A. McKellop, Ronald Salovey
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Publication number: 20030045603Abstract: The present invention discloses a method for enhancing the wear-resistance of polymers by crosslinking them, especially before irradiation sterilization. In particular, this invention presents the use of chemically crosslinked ultrahigh molecular weight polyethylene in in vivo implants.Type: ApplicationFiled: October 3, 2002Publication date: March 6, 2003Applicant: The Orthopaedic Hospital and University of Southern CaliforniaInventors: Ronald Salovey, Harry A. McKellop, Fu-Wen Shen
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Patent number: 6494917Abstract: A method for improving the wear resistance of an implant, made of polyethylene, by crosslinking its bearing surface layer, while leaving its non-bearing interior uncrosslinked. Such crosslinking may be achieved by electron-beam irradiation or by chemical crosslinking of the implant or the polyethylene from which the implant is made. The resulting implant or polyethylene may be further treated to remove the residual free radicals (generated by the electron beam crosslinking process); to remove residual chemicals (generated by the chemical crosslinking process); to remove its most oxidized layer; to stabilize its size and shape; to improve, by remelting, its oxidation resistance; and/or to reshape it into the final implant. Also presented are the resulting implant and polyethylene.Type: GrantFiled: October 6, 2000Date of Patent: December 17, 2002Assignees: Orthopaedic Hospital, University of Southern CaliforniaInventors: Harry A. McKellop, Fu-Wen Shen
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Publication number: 20020037944Abstract: The present invention discloses methods for enhancing the wear-resistance of polymers, the resulting polymers, and in vivo implants made from such polymers. One aspect of this invention presents a method whereby a polymer is irradiated, preferably with gamma radiation, then thermally treated, such as by remelting of annealing. The resulting polymeric composition preferably has its most oxidized surface layer removed. Another aspect of the invention presents a general method for optimizing the wear resistance and desirable physical and/or chemical properties of a polymer by crosslinking and thermally treating it. The resulting polymeric compositions is wear-resistant and may be fabricated into an in vivo implant.Type: ApplicationFiled: February 26, 2001Publication date: March 28, 2002Applicant: The Orthopaedic HospitalInventors: Fu-Wen Shen, Harry A. McKellop, Ronald Salovey
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Publication number: 20010049401Abstract: The present invention discloses a method for enhancing the wear-resistance of polymers by crosslinking them, especially before irradiation sterilization. In particular, this invention presents the use of chemically crosslinked ultrahigh molecular weight polyethylene in in vivo implants.Type: ApplicationFiled: July 2, 2001Publication date: December 6, 2001Applicant: The Orthopaedic Hospital and University of Southern CaliforniaInventors: Ronald Salovey, Harry A. McKellop, Fu-Wen Shen
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Patent number: 6281264Abstract: The present invention discloses a method for enhancing the wear-resistance of polymers by crosslinking them, especially before irradiation sterilization. In particular, this invention presents the use of chemically crosslinked ultrahigh molecular weight polyethylene in in vivo implants.Type: GrantFiled: September 27, 1999Date of Patent: August 28, 2001Assignees: The Orthopaedic Hospital, University of Southern CaliforniaInventors: Ronald Salovey, Harry A. McKellop, Fu-Wen Shen
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Patent number: 6228900Abstract: The present invention discloses methods for enhancing the wear-resistance of polymers, the resulting polymers, and in vivo implants made from such polymers. One aspect of this invention presents a method whereby a polymer is irradiated, preferably with gamma radiation, then thermally treated, such as by remelting of annealing. The resulting polymeric composition preferably has its most oxidized surface layer removed. Another aspect of the invention presents a general method for optimizing the wear resistance and desirable physical and/or chemical properties of a polymer by crosslinking and thermally treating it. The resulting polymeric compositions is wear-resistant and may be fabricated into an in vivo implant.Type: GrantFiled: January 6, 1999Date of Patent: May 8, 2001Assignee: The Orthopaedic Hospital and University of Southern CaliforniaInventors: Fu-Wen Shen, Harry A. McKellop, Ronald Salovey
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Patent number: 6165220Abstract: A method for improving the wear resistance of an implant by crosslinking its bearing surface layer, while leaving its non-bearing interior uncrosslinked. Such crosslinking may be achieved by electron-beam irradiation or by chemical crosslinking of the implant. The resulting implant may be further treated to remove the residual free radicals (generated by the electron beam crosslinking process), to remove its most oxidized layer, and/or to stabilize its size. In the case of chemical crosslinking, the resulting implant may be further treated to remove residual chemicals from the crosslinked surface layer.Type: GrantFiled: April 14, 1998Date of Patent: December 26, 2000Assignees: The Orthopaedic Hospital, University of Southern CaliforniaInventors: Harry Alden McKellop, Fu-Wen Shen