Prosthetic device for correcting deformity of spine

• US 6,723,128 B2
• Filed: 08/20/2001
• Issued: 04/20/2004
• Est. Priority Date: 10/17/2000
• Status: Expired due to Fees

• Current Assignee: Chang Jong Uk
• Original Assignee: Chang Jong Uk
• Inventors: Uk, Chang Jong
• Primary Examiner(s): Smith, Jeffrey A.
• Application Number:
  US09/932,799
• Publication Number:
  US 20020045943A1
• Time in Patent Office: 974 Days
• Field of Search: 623/17.15, 623/17.11, 623/16.11, 623/11.11
• US Class Current: 623/17.15
• CPC Class Codes: A61F 2/30744 End caps, e.g. for closing an endoprosthetic cavity
• CPC Class Codes: A61F 2/446 having a circular or elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones
• CPC Class Codes: A61F 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/30517 using a locking plate
• CPC Class Codes: A61F 2002/30538 for adjusting angular orientation
• CPC Class Codes: A61F 2002/30556 for adjusting thickness
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30774 internally-threaded
• CPC Class Codes: A61F 2002/30779 arcuate
• CPC Class Codes: A61F 2002/30789 perpendicular with respect to each other
• CPC Class Codes: A61F 2002/30904 serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2250/0006 for adjusting angular orientation
• CPC Class Codes: A61F 2250/0009 for adjusting thickness

Abstract

The present invention discloses a prosthetic device for correcting deformity of the spine including a prosthetic device main body being inserted into an intervertebral disk, and having a variable height to correct deformity of the spine, and a control strip inserted into the prosthetic device main body, for controlling a height of the prosthetic device main body. A control strip insertion hole where the control strip is inserted and fixed is formed at the center portion of a height variable surface of the prosthetic device main body, an insertion hole is formed at the rear side portion of the prosthetic device main body which faces the variable surface, and an elastic cutting groove having a variable width is extended in a lateral direction from the control strip insertion hole to the rear surface, for dividing the variable surface into the upper and lower portions. The control strip is rotatably aligned in the control strip insertion hole of the prosthetic device main body, for enabling the variable surface to have an initial insertion position and a maximum height position by the rotation. Two prosthetic devices are inserted into the intervertebral disk of the spine, and fixed at a predetermined angle. As a result, the prosthetic device is easily safely inserted and fixed into a suitable position in a spine operation.

Claims

1. A prosthetic device for correcting deformity of the spine comprising:

a prosthetic device main body for being inserted into an intervertebral disk, and having a variable height to correct deformity of the spine; and

a control strip inserted into the prosthetic device main body, for controlling a height of the prosthetic device main body;

a control strip insertion hole formed at a front side of the prosthetic device main body where the control strip is inserted having upper and lower surfaces which are movable apart for varying the height of the prosthetic device main body;

an insertion hole formed at a rear side of the prosthetic device main body which faces opposite the control strip insertion hole surface;

an elastic groove cut into lateral sides of the prosthetic device main body having a variable width along a longitudinal direction from the front side to the rear side of the prosthetic device main body and dividing the upper and lower surfaces of the control strip insertion hole; and

the control strip being rotatable to different alignment positions in the control strip insertion hole of the prosthetic device main body for varying the height of the prosthetic device main body by rotation thereof,

wherein the control strip is rotatable from an initial insertion position in the control strip insertion hole to a maximum height position spreading the groove to a maximum width to vary the height of the prosthetic device main body to a maximum height by a single rotation, and

wherein the control strip is formed in a polyprism shape having a given length and is rotatable to a predetermined angle so that the height of the prosthetic device main body can be controlled according to the length of the control strip.