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US3732621A Expired / Lapsed US ⏱️ 0.0 years remaining

Permanently implantable fixture means for prothesis and the like

Assignee: Linde Sverige AB
•
Filing: 1971-03-12
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Granted: 1973-05-15
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Expires: 1991-03-12
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Abstract

Abstract As a permanently implantable fixture means for prosthesis and the like in a human body, especially for implanting a dental prosthetic structure, a means composed by at least two parts has been proposed for attaching the prosthetic structure to bone tissue. A first part of the attachment unit is intended to be applied in such a way in the bone tissue that it will remain embedded in said tissue during all of the time required for healing the damage which occurs when the first part is attached to the bone and while the bone tissue grows into the attachment, and a second part of the attachment unit, serving as mounting unit for the prosthetic structure and so shaped that it may be attached to the first part of the attachment unit and pass through such weak tissue covering the bone tissue. The mounting unit is intended to combine the attachment unit inserted into the bone tissue with a prosthetic structure located outside of the weak tissue. Such permanently implantable attachment means have been used for permanently attaching dental prosthetic structure to the jawbone in human bodies. The jawbones rather often have a narrow crosssection, and the longitudinal direction of the cross-section may be diverge sharply at different parts of the same jaw and/or the same jawbone but especially between the upper jaw and the lower jaw. This, among other reasons, results in so-called over-bite or under-bite, respectively. As the attachment units must, for technical reasons, be well centered in the jawbone, the longitudinal directions of the attachment units will not always be in alignment mutually in the same jaw, nor between the upper jaw and the lower jaw. This is a serious disadvantage, because the longitudinal direction of the teeth in the prosthetic structure should be in alignment with the longitudinal direction of the attachment unit. A compromise between these demands either a weak or completely unsatisfactory attachment in the jawbone or non-aligned prosthetic structure. Therefore, there is a need for an attachment means of the kind indicated above, in which the said first part attached to the jawbone may form an angle with the said second part to which the prosthetic structure is attached.

Inventors

  • 👤 B Bostrom

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 01:50
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0048; A61C8/0018; A61C8/0022; A61C8/0034; A61C8/005; A61C8/0053; A61C8/0069

Claims Analysis

Total Claims: 21
Claim 1
Independent Claim 120 words
A prosthetic device comprising: a first part having means to be permanently implanted into a bone such that the bone tissue grows into the first part, a second part including means for attaching the prosthetic structure thereon, and a joint connecting said first and second parts, said joint being a universal joint permitting at least limited universal movement of the second part relative to the first part, and said joint including means for locking the universal joint in any selected position within the range of said limited universal movement to prevent further relative movement of the first and second parts, and including means for separating said first and second parts from each other in the vicinity of said universal joint.
Claim 2
Dependent Claim 120 words
A prosthetic device comprising: a first part having means to be permanently implanted into a bone such that the bone tissue grows into the first part, a second part including means for attaching the prosthetic structure thereon, and a joint connecting said first and second parts, said joint being a universal joint permitting at least limited universal movement of the second part relative to the first part, and said joint including means for locking the universal joint in any selected position within the range of said limited universal movement to prevent further relative movement of the first and second parts, and including means for separating said first and second parts from each other in the vicinity of said universal joint.
Claim 3
Dependent Claim 49 words
A prosthetic device according to claim 1, in which said universal joint is a ball and socket joint and wherein the portion of said second part adjacent the joint is adapted to pass through the soft tissue covering the bone tissue into which the first part is permanently implanted.
Claim 4
Dependent Claim 37 words
A prosthetic device according to claim 2, wherein the ball of the ball joint is attached to one of said parts and is embraced by a ball claw which is attached to the other of said parts.
Claim 5
Dependent Claim 27 words
A prosthetic device according to claim 2, wherein the ball is at least substantially spherical and is attached by means of a neck to its respective part.
Claim 6
Dependent Claim 29 words
A prosthetic device according to claim 2, said ball being formed as an elipsoid, ovaloid or the like, and including a pin connecting said ball to the first part.
Claim 7
Dependent Claim 54 words
A prosthetic device according to claim 2, said ball being substantially semi-spherical and formed integrally with one of said parts and the socket embracing the semi-spherical surface and attached to the other of said parts, and including a stretching means running through the ball and socket joint and urging said ball and socket together.
Claim 8
Dependent Claim 23 words
A prosthetic device according to claim 2, said ball being substantially spherical and resting in sockets in each of the two said parts.
Claim 9
Dependent Claim 41 words
A prosthetic device according to claim 3, said ball claw having an opening, and a pin connected to the ball and extending through said opening and connected to the part other than that part to which the ball claw is connected.
Claim 10
Dependent Claim 28 words
A prosthetic device according to claim 6, wherein said stretching means includes at least one substantially conical recess passing through the ball for carrying the said stretching means.
Claim 11
Dependent Claim 42 words
A prosthetic device according to claim 9, wherein the ball is substantially spherical and includes a pair of inwardly converging conical recesses which meet at the center of the ball to form an opening completely through the ball for said stretching means.
Claim 12
Dependent Claim 22 words
A prosthetic device according to claim 2, wherein said locking means comprises a spring means for urging the ball against its socket.
Claim 13
Dependent Claim 51 words
A prosthetic device according to claim 11, including a ball claw embracing the said ball, and wherein said locking means includes a threaded engagement between a pin integral with one of said parts and said ball for displacing the ball relative to the ball claw for urging these two parts together.
Claim 14
Dependent Claim 84 words
A prosthetic device according to claim 11, wherein said locking means includes stretching means running through the ball and socket joint, the stretching means being attached at one of its ends to one of said first and secoNd parts, and the other end of the stretching means being attached to the other of said first and second parts, and at least one of said parts being displaceable by means of a screw thread arrangement in the axial direction under the stretching of stretching means.
Claim 15
Dependent Claim 30 words
A prosthetic device according to claim 3, wherein the ball claw is provided on its outer surface with a profile which facilitates engaging the ball claw to turn the same.
Claim 16
Dependent Claim 38 words
A prosthetic device according to claim 3, including a sleeve contacting the outer side of the ball claw with a partially concave surface to form said socket, and a spring means for urging the ball and sleeve together.
Claim 17
Dependent Claim 23 words
A prosthetic device according to claim 15, said sleeve being provided on its outside surface with a profile to facilitate turning the same.
Claim 18
Dependent Claim 46 words
A prosthetic device according to claim 3, the said ball in the ball joint being incompletely spherical, a spherical portion of the ball engaging the ball claw, and a non-spherical portion of the ball engaging a spring arranged to urge the ball against the ball claw.
Claim 19
Dependent Claim 29 words
A prosthetic device according to claim 17, said ball including a pin for connecting the ball with one of said parts, said pin forming a seat for said spring.
Claim 20
Dependent Claim 27 words
A prosthetic device according to claim 18, said claw being generally spherical and embracing the ball, said spring resting against a spherical portion of said ball claw.
Claim 21
Dependent Claim 41 words
A prosthetic device according to claim 2, including an intermediate part, a first ball and socket joint connecting said intermediate part to said first part and a second ball and socket joint connecting said intermediate part to the said second part.

References Cited (Backward Citations)

US3618212A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-05-14 1976-11-13 1977-05-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-05-14 1980-11-13 1981-05-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-05-14 1984-11-13 1985-05-15 $7700.00 Window Closed / Lapsed

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