CA2461791A1 - Artificial intervertebral disc having a slotted belleville washer force restoring element - Google Patents

Artificial intervertebral disc having a slotted belleville washer force restoring element Download PDF

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Publication number
CA2461791A1
CA2461791A1 CA002461791A CA2461791A CA2461791A1 CA 2461791 A1 CA2461791 A1 CA 2461791A1 CA 002461791 A CA002461791 A CA 002461791A CA 2461791 A CA2461791 A CA 2461791A CA 2461791 A1 CA2461791 A1 CA 2461791A1
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CA
Canada
Prior art keywords
washer
belleville washer
intervertebral disc
plates
restoring element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002461791A
Other languages
French (fr)
Other versions
CA2461791C (en
Inventor
James D. Ralph
Stephen Tatar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spinecore Inc
Original Assignee
Spinecore, Inc.
James D. Ralph
Stephen Tatar
Third Millennium Engineering, Llc
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Filing date
Publication date
Application filed by Spinecore, Inc., James D. Ralph, Stephen Tatar, Third Millennium Engineering, Llc filed Critical Spinecore, Inc.
Publication of CA2461791A1 publication Critical patent/CA2461791A1/en
Application granted granted Critical
Publication of CA2461791C publication Critical patent/CA2461791C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • A61F2220/0058—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements soldered or brazed or welded
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    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00365—Proteins; Polypeptides; Degradation products thereof

Abstract

An artificial disc having a pair of opposing plates for seating against opposing vertebral bone surfaces, separated by at least one spring mechanism. The preferred spring mechanism is at least one spirally slotted belleville washer, and in some embodiments the belleville washer is also radially thinning or thickening. Various illustrated embodiments use two washers or one washer. For double washer embodiments, the wide ends of the washers seat against respective opposing plates, in some embodiments each being maintained thereagainst by a retaining wall and ring or a circular recess and retaining shield. For single washer embodiments, the narrow end of the washer can be modified to have a curvate socket for rotatably mounting onto a semispherical protuberance extending from one of the plates.
CA002461791A 2001-10-01 2002-06-19 Artificial intervertebral disc having a slotted belleville washer force restoring element Expired - Fee Related CA2461791C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/968,045 US6740117B2 (en) 2001-02-15 2001-10-01 Intervertebral spacer device having a radially thinning slotted belleville spring
US09/968,045 2001-10-01
PCT/US2002/019660 WO2003028595A1 (en) 2001-10-01 2002-06-19 Artificial intervertebral disc having a slotted belleville washer force restoring element

Publications (2)

Publication Number Publication Date
CA2461791A1 true CA2461791A1 (en) 2003-04-10
CA2461791C CA2461791C (en) 2008-05-27

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CA002461791A Expired - Fee Related CA2461791C (en) 2001-10-01 2002-06-19 Artificial intervertebral disc having a slotted belleville washer force restoring element

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US (4) US6740117B2 (en)
EP (3) EP1437988B1 (en)
JP (1) JP4202918B2 (en)
AT (1) ATE462381T1 (en)
AU (1) AU2002316316B2 (en)
CA (1) CA2461791C (en)
DE (1) DE60235824D1 (en)
IL (2) IL161136A0 (en)
WO (1) WO2003028595A1 (en)

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