Source: http://www.google.com/patents/US5417570?dq=6,757,710
Timestamp: 2014-03-07 19:32:59
Document Index: 336364389

Matched Legal Cases: ['art 16', 'art 20', 'art 16', 'art 16', 'art 16', 'art 97', 'art 97', 'arts 97', 'arts 97', 'arts 96', 'art 96', 'art 97', 'art 97']

Patent US5417570 - Dental anchor assembly - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA multiple part anchor assembly is designed for attaching a dental appliance to a non-vital tooth root or an implant, and has a female part for attachment to a tooth root or implant, a male part or stud having a first end for releasable snap engagement in a socket in the female part with some relative...http://www.google.com/patents/US5417570?utm_source=gb-gplus-sharePatent US5417570 - Dental anchor assemblyAdvanced Patent SearchPublication numberUS5417570 APublication typeGrantApplication numberUS 08/176,597Publication dateMay 23, 1995Filing dateJan 3, 1994Priority dateJan 3, 1994Fee statusPaidAlso published asCA2154267A1, DE69411548D1, DE69411548T2, EP0688193A1, EP0688193B1, WO1995018581A1Publication number08176597, 176597, US 5417570 A, US 5417570A, US-A-5417570, US5417570 A, US5417570AInventorsMax Zuest, Paul ZuestOriginal AssigneeZest Anchors, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (22), Referenced by (92), Classifications (9), Legal Events (8) External Links: USPTO, USPTO Assignment, EspacenetDental anchor assemblyUS 5417570 AAbstract A multiple part anchor assembly is designed for attaching a dental appliance to a non-vital tooth root or an implant, and has a female part for attachment to a tooth root or implant, a male part or stud having a first end for releasable snap engagement in a socket in the female part with some relative movement permitted between the parts, a cap for securing in a recess in a dental appliance having a second socket, and the male part having a swivel joint at its opposite end for engagement in the second socket to secure the root or implant to the appliance, the hinge joint allowing hinging of the stud relative to the cap.
We claim: 1. An anchor assembly for attaching a dental appliance to a tooth root or tooth implant, comprising:a female socket member for insertion in a tooth root or implant, the socket member having a first socket; a male stud member having an elongate shaft with opposite first and second ends, a head at the first end of the shaft for releasable snap engagement in the first socket to allow relative movement between the stud member and first socket, and a swivel joint at the second end of the shaft; securing means for securing the swivel joint in a recess in a dental appliance, the swivel joint comprising means for permitting swivelling of the stud member relative to the dental appliance, the amount of motion permitted by the swivel joint being greater than that permitted between the head and the first socket; a cap for securing in a recess in a dental appliance, the cap having a second socket, the second socket and the swivel joint having interchangeable retainer means for retaining the swivel joint in the socket; and the interchangeable retainer means comprising snap lock formations for snap lock engagement of the swivel joint in the second socket. 2. The assembly as claimed in claim 1, wherein the swivel joint comprises a pivot head at the second end of the shaft having an at least partially spherical surface, and a separate retainer ring surrounding said pivot head and having an at least partially spherical annular surface for swivel engagement with said at least partially spherical surface of said pivot head.
4. An anchor assembly for attaching a dental appliance to a tooth root or tooth implant, comprising:a female socket member for insertion in a tooth root or implant, the socket member having a first socket; a male stud member having an elongate shaft with opposite first and second ends, a head at the first end of the shaft for releasable snap engagement in the first socket to allow relative movement between the stud member and first socket, and a swivel joint at the second end of the shaft; securing means for securing the swivel joint in a recess in a dental appliance, the swivel joint comprising means for permitting swivelling of the stud member relative to the dental appliance, the amount of motion permitted by the swivel joint being greater than that permitted between the head and first socket; a cap for securing in a recess in a dental appliance, the cap having a second socket, the second socket and the swivel joint having interchangeable retainer means for retaining the swivel joint in the socket; and the swivel joint comprises a two part hinge, a first hinge part comprising a head formed integrally at said second end of the pin member and a second hinge part being hingably engaged with said first hinge part and comprising means for snap engagement in said second socket. 5. The assembly as claimed in claim 4, wherein the second hinge part comprises an annular retainer ring encircling said head, the head and retainer ring having opposing, at least partially spherical hinge surfaces, and the ring having an outer surface shaped for snap engagement in said second socket.
8. An anchor assembly for attaching a dental appliance to a tooth root or tooth implant, comprising:a female socket member for insertion in a tooth root or implant, the socket member having a first socket; a male stud member having an elongate shaft with opposite first and second ends, a head at the first end of the shaft for releasable snap engagement in the first socket to allow relative movement between the stud member and first socket, and a swivel joint at the second end of the shaft; the male stud member being of resilient material and the female socket member being of metal; and securing means for securing the swivel joint in a recess in a dental appliance, the swivel joint comprising means for permitting swivelling of the stud member relative to the dental appliance, the amount of motion permitted by the swivel joint being greater than that permitted between the head and first socket. 9. An anchor assembly for attaching a dental appliance to a tooth root or tooth implant, comprising:a female socket member for insertion in a tooth root or implants the socket member having a first socket; a male stud member having an elongate shaft with opposite first and second ends, a head at the first end of the shaft for releasable snap engagement in the first socket to allow relative movement between the stud member and first socket, and a swivel joint at the second end of the shaft; securing means for securing the swivel joint in a recess in a dental appliance, the swivel joint comprising means for permitting swivelling of the stud member relative to the dental appliance, the amount of motion permitted by the swivel joint being greater than that permitted between the head and first socket; and said head having a cylindrical band portion and said first socket having a corresponding first annular portion for receiving said band portion, and a reduced diameter portion for releasably retaining said band portion in said socket. 10. The assembly as claimed in claim 9, including a cap for securing in a recess in a dental appliance, the cap having a second socket, the second socket and the swivel joint having interengageable retainer means for retaining the swivel joint in the socket.
20. The assembly as claimed in claim 19, including angled abutment members having sockets at angles of 6 central axis of said members.
21. An anchor assembly for attaching a dental appliance to a tooth root or tooth implant, comprising:a female socket member for insertion in a tooth root or implant, the socket member having a socket; a male stud member having an elongate shaft with opposite first and second ends, a head at the first end of the shaft for releasable snap engagement in the socket, and the second end comprising means for securing to a dental appliance; the head having an enlarged cylindrical band portion of larger diameter than the shaft; and the socket having an annular groove portion of dimensions substantially matching those of the cylindrical band portion for releasable snap engagement with said band portion. 22. The assembly as claimed in claim 21 wherein said band portion has a flat region.
29. An anchor assembly for attaching a dental appliance to a divergent implant extending at an angle to the desired path of insertion of the appliance, comprising:a base part having a cuff portion and a stem depending downwardly from the cuff portion, the stem having mating formations for mating engagement with a bore of a divergent implant, the cuff portion having a tapered socket having a predetermined machined taper; an angled abutment part having opposite first and second ends and a tapered outer surface portion extending from the first end of the part along at least part of the length of the part, the tapered portion having a predetermined machined taper matching that of the tapered socket for permanent locking engagement in said socket when the parts are forced together, the tapered portion having a central axis, and an angled socket extending inwardly from the second end of the abutment part at a predetermined angle to the central axis of said tapered portion; and a stud member for releasably securing the abutment part to a dental appliance, the stud member having a first head at one end for releasable snap engagement in said angled socket, and securing means at the opposite end of the stud for securing the stud member to a dental appliance. 30. The assembly as claimed in claim 29, including a plurality of angled abutment parts having angled sockets extending at different angles to the central axis of the tapered portion.
31. The assembly as claimed in claim 30 wherein the sockets extend at angles of 6
32. An anchor assembly for attaching a dental appliance to a divergent implant extending at an angle to a desired orientation axis of the implant, the assembly comprising:a base part for insertion in an implant, the base part having a tapered socket with a first longitudinal axis which will be aligned with the axis of the implant when installed, the socket having a predetermined machined taper; an abutment part having a first portion for attachment to a dental appliance and a second, tapered portion for insertion in said tapered socket, the tapered portion having a predetermined machined taper matching that of the socket for permanent locking engagement in said socket when said parts are forced together with the axis of said second portion coaxial with the axis of said socket; the first portion of the abutment part having a longitudinal axis extending at an angle to the axis of said second portion and socket, whereby said abutment part can be freely rotated about the axis of said socket when seated loosely in said socket to vary the orientation of said second portion relative to said socket; and said matching tapers comprising means for permanently locking the parts together when said abutment part is forced into said socket when a desired relative orientation between said second portion and socket is reached. 33. The assembly as claimed in claim 32, wherein said base part has a tool-engaging bore extending downwardly from said socket, the tool-engaging bore having mating formations for mating engagement with an installation tool for installing the base part on an implant or removing the base part from an implant, and the abutment part has a through bore aligned with said tool-engaging bore when said parts are locked together to allow an installation tool to be extended through said bore in said abutment part to engage said tool-engaging bore.
36. An anchor assembly for attaching a dental appliance to a divergent implant, comprising:a base part having securing means for releasably securing the base part to an implant extending at an angle to a desired orientation direction of a dental appliance to be secured to the implant, the base part having a socket; an angled abutment part having a first portion for engagement in said socket at a selected orientation relative to said base part, and a second portion extending at an angle to said first portion, the second portion having coupling means for coupling said abutment part to a dental appliance; securing means for securing said abutment part to said base part at a selected relative orientation between said parts; the socket having an inner end, and a tool-engaging bore projecting from the inner end of said socket, the tool-engaging bore having mating formations for mating engagement with a tool for securing the base part to an implant or releasing the base part from the implant; and the abutment part having a through bore aligned with said tool-engaging bore when the parts are secured together, whereby a tool can be inserted into said tool-engaging bore when said parts are secured together via said through bore. 37. The assembly as claimed in claim 36, wherein said tool-engaging bore is a hexagonal bore.
38. A method of anchoring a dental appliance to a divergent implant, comprising the steps of:securing a stem portion of a base part into a bore of divergent implant, the base part having a tapered socket; placing a tapered portion of an angled abutment loosely into the tapered socket of the base part, the tapered portion and tapered socket having matching tapers; rotating the abutment relative to the socket until an angled socket in the abutment is oriented substantially in alignment with a desired path of insertion of a dental appliance; with the angled socket at the desired orientation, forcing the tapered portion of abutment into the tapered socket until the abutment is permanently locked into the socket; and releasably securing one end of a male part into the angled socket whereby a dental appliance attached to the other end of the male part is anchored to the implant. Description
BACKGROUND OF THE INVENTION The present invention relates to dental attachment systems or anchors for attaching dental appliances such as overdentures, partial dentures and the like to a remaining non-vital root or to an endosseus implant.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a new and improved anchor assembly for a dental appliance.
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 illustrates the components of an anchor assembly 10 according to a first embodiment of the invention for attaching a dental appliance 12 such as an over-denture or partial denture to a remaining non-vital root 14, as illustrated in FIG. 2. The anchor assembly 10 basically comprises a female or socket part 16 for securing in a correspondingly shaped cut-out or recess in root 14, a cap 18 for securing in a correspondingly shaped cut out in appliance 12, and a stud or male part 20 for attaching the socket part 16 to the cap 18. Preferably, the cap and female part are both of metal while the pin or stud 20 is of resilient plastic material. Also included in the assembly are a retainer ring 22 for securing the stud 20 to the cap 18, and a centering sleeve 24 for preventing movement of the male part during processing.
The installation procedure for installing the anchor assembly 10 at a selected location in a patient's oral cavity will now be described. The basic procedure is more or less identical to that used for previous Zest anchors as manufactured by Zest Anchors Inc. of Escondido, Calif., and as described in U.S. Pat. No. 3,787,975 referred to above. Firstly, each non-vital tooth in which an anchor is to be installed is reduced to the gingival level. Next, a hole is drilled with a suitably shaped drill matching that of female or socket part 16, forming a full 360 recessed seat on the occlusal surface of the dental root 14. The metal female part 16 is then cemented in the recessed seat, and any final root contouring is completed as necessary in the dental office.
The angled socket part 97 has an angled upper end portion 114 and a through bore 116 extends through part 97. Through bore 116 has a lower portion 118 which is coaxial with cylindrical cuff 98 and an angled upper socket portion 120. Socket portion 120 is shaped for releasable snap engagement with the lower end 46 of a male stud 20. Thus, as in the previous embodiments, socket portion 120 has a tapered lead in portion 122, cylindrical portion 124 matching the diameter of shaft 40, ring portion 126 of diameter matching that of the snap-in ring portion 46 of stud 20, and lower tapered portion 128. Socket parts 97 will be provided with a range of different angles to allow attachment to divergent implants at varying angles. Preferably, parts 97 are provided with socket portions 120 at angles of 6 118. Both parts 96 and 97 are of a suitable metal such as titanium alloy coated with a suitable wear resistant coating such as titanium nitride.
With this arrangement, base part 96 can be secured to a divergent implant 84, so that tapered socket 99 will be at the same angle as the implant, as illustrated in FIG. 8. An appropriate angled socket part 97 is then selected to compensate for this angle, so that socket portion 120 is substantially vertically oriented in the jaw regardless of the angle of the implant. Socket part 97 is first placed loosely in the tapered socket and rotated about its axis until the correct orientation is reached, using a parallel pin having an end for snap engagement in socket 120 to determine when the best alignment is reached both with other abutments and with the path of insertion of the prosthesis. Once the best alignment is achieved, the angled socket part is jammed down into the matching tapered socket, for example by tapping on its end with an appropriate seating tool. The precision machined tapers will permanently lock the two pieces into one. The taper angle is preferably of the order of 1 which is known as a Morse taper. This has been found to create a permanent lock of at least 36 lbs with a tap of as little as 7 lbs. of force. The Morse taper looking engagement between the parts avoids the need to use cement or bonding adhesive between the parts, and makes installation a simple, one-step procedure. This eliminates the need for marking a correct relative position between an insert and socket, then removing the insert to apply cement or adhesive.
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Dental Devices Ltd.A compound angular joint for connecting an abutment to a dental implant in a predefined angleWO2011101807A2 *Feb 17, 2011Aug 25, 2011Alpha Bio Tec Ltd.Modular abutment system for tilted dental implants* Cited by examinerClassifications U.S. Classification433/177, 433/173, 433/172International ClassificationA61C13/265, A61C8/00Cooperative ClassificationA61C8/0048, A61C13/2656European ClassificationA61C8/00G, A61C13/265CLegal EventsDateCodeEventDescriptionAug 27, 2013ASAssignmentFree format text: RELEASE BY SECURED PARTY;ASSIGNOR:RBS CITIZENS, N.A.;REEL/FRAME:031093/0958Effective date: 20130816Owner name: ZEST IP HOLDINGS, LLC, CALIFORNIAAug 20, 2013ASAssignmentOwner name: DEUTSCHE BANK AG NEW YORK BRANCH, NEW YORKFree format text: SECURITY AGREEMENT;ASSIGNOR:ZEST IP HOLDINGS, LLC;REEL/FRAME:031049/0888Effective date: 20130816Free format text: SECURITY AGREEMENT;ASSIGNOR:ZEST IP HOLDINGS, LLC;REEL/FRAME:031050/0196Mar 29, 2011ASAssignmentEffective date: 20110215Owner name: RBS CITIZENS, N.A., RHODE ISLANDFree format text: INTELLECTUAL PROPERTY COLLATERAL AGREEMENT;ASSIGNOR:ZEST IP HOLDINGS, LLC;REEL/FRAME:026042/0426Feb 19, 2010ASAssignmentFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ZEST ANCHORS, INC.;REEL/FRAME:023963/0154Effective date: 20091231Owner name: ZEST IP HOLDINGS, LLC,CALIFORNIANov 3, 2006FPAYFee paymentYear of fee payment: 12May 29, 2002FPAYFee paymentYear of fee payment: 8Nov 23, 1998FPAYFee paymentYear of fee payment: 4Jan 3, 1994ASAssignmentOwner name: ZEST ANCHORS, INC., CALIFORNIAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ZUEST, MAX;ZUEST, PAUL;REEL/FRAME:006857/0381Effective date: 19931209RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google