Source: http://www.google.com/patents/US5492452?dq=7,003,515
Timestamp: 2016-05-04 20:22:36
Document Index: 224220236

Matched Legal Cases: ['art 12', 'art 58', 'art 58', 'art 56', 'art 58', 'art 12']

Patent US5492452 - Fastening nail and an assembly of tools for securing the nail - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA fastening nail for fixing a cover membrane to a bone void which surrounds the bone of the body itself and is filled with an ossiferous material has a nail head with a larger diameter which enables receiving pressure of an impact tool for inserting a nail shaft with a smaller diameter into the bone....http://www.google.com/patents/US5492452?utm_source=gb-gplus-sharePatent US5492452 - Fastening nail and an assembly of tools for securing the nailAdvanced Patent SearchPublication numberUS5492452 APublication typeGrantApplication numberUS 08/175,967Publication dateFeb 20, 1996Filing dateDec 30, 1993Priority dateJan 4, 1993Fee statusLapsedAlso published asCA2112755A1, CA2112755C, CA2205636A1, DE4300039C1, EP0613657A1, EP0613657B1, EP0830844A1, US5544552Publication number08175967, 175967, US 5492452 A, US 5492452A, US-A-5492452, US5492452 A, US5492452AInventorsAxel Kirsch, Walter DuerrOriginal AssigneeAxel Kirsch, Eberle Medizintechnische Elemente GmbhExport CitationBiBTeX, EndNote, RefManPatent Citations (6), Referenced by (21), Classifications (42), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetFastening nail and an assembly of tools for securing the nail
US 5492452 AAbstract
1. A fastening nail for securing a cover membrane to a bone void which surrounds the bone of a body itself, which void is filled with an ossiferous material, said nail comprising an essentially cylindrical holding part having an essentially conical tapering point part adjacent one end and a nail head with a pressing surface and a substantially larger diameter adjacent the opposite end, a transition region between the holding part and the point part having an annular shoulder with an enlarged diameter which has a conical surface merging obliquely into the generated surface of the conical tapering point part in a direction toward the point of the nail and has an annular surface extending essentially perpendicular to a longitudinal axis of the fastening nail adjoining the holding part to form an annular barb-like shoulder facing toward the nail head.
2. A fastening nail according to claim 1, wherein the conical surface of the annular shoulder describes a larger angle with the longitudinal axis of the fastening nail than the conical surface forming the point part adjacent thereto.
3. A fastening nail according to claim 2, wherein the angle between the conical surface of the annular shoulder and the longitudinal axis of the fastening nail amounts to approximately 25�.
4. A fastening nail according to claim 1, wherein the holding part has a bevel at a point of merger with the pressing surface of the nail head, which pressing surface extends essentially perpendicular relative to the longitudinal axis of the fastening nail.
5. A fastening nail according to claim 1, wherein the circumferential edge of the nail head has a circumferential bevel adjacent the pressing surface, which bevel ascends from the pressing surface in a direction toward the head surface of the nail head facing away from the nail shaft.
6. A fastening nail according to claim 1, wherein the head surface of the nail head is a rounded surface.
7. A fastening nail according to claim 1, wherein the nail is formed of a titanium alloy.
In the field of maxillary surgery, it is standard to fill voids in the body-intrinsic bone with a bone replacement or ossiferous material which, for example, is composed of hydroxyl apatite granules, potentially mixed with bone granules of the body itself. A void filled with this ossiferous material is then covered with a cover membrane composed of a body-compatible plastic material or the like which will lie against the bone of the body itself next to the void. This is important so that the ossiferous material is penetrated in an osseous fashion by the bone of the body itself, whereby it is undesirable to have some other type of connective tissue, particularly mucous membrane tissue, growing through the ossiferous material, since a satisfactory filling of the bone void with the rejuvenated bone material does not occur in this case.
The setting tool 10 of the present invention comprises an elongated, pencil-like grip part 12 which has a pressure/impact head 14 provided at one end for receiving blows, for example from a hammer. At an opposite end, the tool 10 has resilient means 16 for holding a nail 30. As best illustrated in FIGS. 2 and 2a, the resilient means 16 comprises four gripping jaws 18 and 20, which are separated from one another by cross-extending slots 22 which are formed in the end of the tool 10. Each of the jaws 18 have a seating surface 24 and the jaws 20 have a seating surface 26, which is recessed so that each jaw 18 has an outer portion or lip 24a adjacent the surface 24 and the jaws 20 have a lip or portion 26a adjacent the surface 26. These portions 24a and 26a form a recess for receiving a head 28 of the nail 30 which has an upper convex surface 34 which is rounded and the height of the head 28 between a pressing surface 32 is greater than the depth of the recess formed by the portions 24a and 24b so that when a nail head is received, the surface 32 extends below the lower edges of the lips 24a and 26a.
As illustrated in FIG. 4, the setting tool can include an insertion aid or auxiliary tool, generally indicated at 54, which includes a handle portion 56 and a fixing part 58. The fixing part 58 comprises a retainer foot 60 that is provided with a setting opening 62 on whose two sides retainer arbors, pins or points 64, 66 are arranged to lie diametrically opposite one another. A drill template 68 composed of a flexible sheet has a drill opening 70 at its end facing away from the gripping part 56 and has an actuation element 72 on its end facing toward the gripping part. This template 68, thus, is built to slide in a groove provided in the part 58 from a drilling or first position illustrated, such as in FIG. 7a, to a retracted position, such as illustrated in FIG. 6a.
The present invention is utilized as follows. In the simplest case, when there is no prior introduction of a pilot hole or guide bore in the solid bone of the body itself is necessary, a fastening nail 30 may .be introduced into the resilient means 16 of the setting tool 10 in the form such as illustrated in FIG. 2. The gripping jaws 18 and 20 resiliently hold the nail head 28 so that the head surface 34 presses against the seating shoulders 24 and 26 of the gripping jaws 18 and 20. As a consequence of the dimensioning that was set forth above, the pressing surface 32 of the fastening nail lies below the end faces of the projections 24a and 26a and will engage the bone before these projections will. The gripping part 12 of the setting tool is grasped by the operator, whereupon the fastening nail is pressed into the bone or is driven into the bone given the assistance of a hammer striking the pressure/impact head 14. As a result of this, the cover membrane lying on the bone is firmly clamped between the pressing surface 32 of the nail head 28 and the bone surface adjacent thereto. The bevel 50 prevents undesirable mucous membrane residues or the like from collecting in a "dead angle". As a result of the tight placement of the cover membrane (not shown) against the bone, soft connective tissue, particularly mucous tissue, is prevented from penetrating and growing into the void of the bone covered with the cover membrane and filled with the bone replacement material. As a result, an osseous in-growth of the bone replacement or ossiferous compound is guaranteed. The seating shoulder 42, which is barb-like, thereby guarantees a firm seating or anchoring of the fastening nail 30 in the bone. The circumferential bevel 52 makes it possible to, in turn, remove the fastening nail 30 from the bone when desired by applying a forceps or the like.
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