Source: http://www.google.com/patents/US7175434?ie=ISO-8859-1&dq=4316055
Timestamp: 2014-07-30 03:11:53
Document Index: 39116874

Matched Legal Cases: ['arts 1', 'art 4', 'art 1', 'art 6', 'art 10', 'art 10', 'art 12', 'arts 10', 'art 9', 'art 10']

Patent US7175434 - Implant arrangement and device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsIn an arrangement with implant and attachment part/dental bridge, the latter comprises one or more recessed walls. The implant is designed or can cooperate with a portion which can be arranged on a spacer sleeve belonging to the implant and extends substantially parallel to the recessed wall. The attachment...http://www.google.com/patents/US7175434?utm_source=gb-gplus-sharePatent US7175434 - Implant arrangement and deviceAdvanced Patent SearchPublication numberUS7175434 B2Publication typeGrantApplication numberUS 10/500,031Publication dateFeb 13, 2007Filing dateDec 19, 2002Priority dateDec 28, 2001Fee statusPaidAlso published asDE60233896D1, EP1469787A1, EP1469787B1, US20050202370, WO2003061512A1, WO2003061512A8Publication number10500031, 500031, US 7175434 B2, US 7175434B2, US-B2-7175434, US7175434 B2, US7175434B2InventorsIzidor BrajnovicOriginal AssigneeNobel Biocare Ab (Publ.)Export CitationBiBTeX, EndNote, RefManPatent Citations (11), Referenced by (3), Classifications (5), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetImplant arrangement and deviceUS 7175434 B2Abstract In an arrangement with implant and attachment part/dental bridge, the latter comprises one or more recessed walls. The implant is designed or can cooperate with a portion which can be arranged on a spacer sleeve belonging to the implant and extends substantially parallel to the recessed wall. The attachment part and its respective recessed wall is arranged with displaceability in the main longitudinal direction of the implant relative to the outer surface of the portion. The portion is arranged to be expandable so that, in a given position of longitudinal displacement, it is possible to achieve interaction between outer surfaces of the portion and the recessed wall and thus anchoring of the attachment part to the portion or the implant. The invention also relates to a device with two or more implants and dental bridge. By means of the invention, discrepancies between dental bridge and the implants can be taken up in an effective and rapid securing principle.
6. The arrangement as claimed in claim 1, wherein the fastening screw is made of gold, wherein the outer screw surface is designed as a truncated cone and is located at a head of the screw, and wherein the outer screw surface is arranged with a half cone angle of ca. 40�.
BACKGROUND OF THE INVENTION The present invention relates to an arrangement with implant and attachment part, for example in the form of a dental bridge. The attachment part comprises a recessed wall and the implant is designed or can cooperate with a portion which preferably can be applied on a spacer sleeve belonging to the implant. Said portion preferably extends substantially parallel to the recessed wall.
SUMMARY OF THE INVENTION The feature which can principally be regarded as characterizing the arrangement discussed in the introduction is that the attachment part and its recessed wall are arranged with displaceability in the main longitudinal direction of the implant relative to the outer surface of the portion, and in that the portion is arranged to be expandable so that, in a given position of longitudinal displacement, it is possible to achieve interaction between the outer surface of the portion and the recessed wall and thus anchoring of the attachment part to the portion, i.e. the implant.
By means of what is proposed above, a patient-friendly securing principle for dental bridges in implants is obtained which is rapid and effective and, inter alia, permits easy readjustment and exchange of the respective attachment part/dental bridge. Material types which have proven themselves in this context can be used in the bridge and spacer sleeve constructions and in the fastening screws. The application function is considerably simplified and can for example be controlled by end-position indication or end-position stops in one of the bridge's recesses. When the end position has been reached, the bridge is screwed tightly in place and at the same time acquires its �horizontal position� in the patient's mouth. Other longitudnal displacement positions between recesses and portions on other implants are determined by the initial fitting, and anchoring or anchorings can also be carried out in these longitudinal displacement positions.
BRIEF DESCRIPTION OF THE DRAWINGS A presently proposed arrangement and proposed device will be described below with reference to the attached drawings, in which
DETAILED DESCRIPTION OF THE INVENTION In FIG. 1, an implant is indicated by 1. The implant is screwed tightly in a jaw bone 2. The application of the implant can alternatively take place in another type of bone in the human body. The gum parts (gingiva) 3 of the jaw bone or equivalent have been exposed or opened at the implant site and have been shown in the folded back position. At its upper parts 1 a, the implant can cooperate with or is provided with a spacer sleeve 4 which is anchored to the upper parts of the implant at an upwardly projecting flange or hexagon 1 a′ on the implant. The spacer sleeve has at the bottom a circular part 4 a which surrounds the upwardly projecting part 1 a′. In a manner known per se, the sleeve is also provided with an internal flange 4 b which constitutes a support for a fastening screw, whose bottom surface 5 a can cooperate with the internal flange in order to permit anchoring of the spacer sleeve in the implant by means of the fastening screw 5. The spacer sleeve is provided with an upper internal recess 4 c for the head 5 b of the screw 5. An attachment part 6 is applied on the spacer sleeve, at upper portions 4 d of the latter. The attachment part is applied via a bridge sleeve which has been indicated by 7. The attachment part is also provided with a recess 6 a, via which the fastening screw can be applied to the recess 4 c in the spacer sleeve in order to allow the latter to be screwed tightly in the implant. In a manner known per se, the implant is provided with threads 1 b, by means of which the implant can be screwed in a recess or a hole 2 a in the dentine. At the bottom, the bridge sleeve 7 bears against an external flange 4 e on the spacer sleeve so that an end position is obtained for the bridge sleeve in relation to the spacer sleeve. The bridge sleeve and the spacer sleeve are anchored to one another via a gap 8 which in accordance with a known technique is filled with cement in order to allow the attachment part to be affixed to the implant. In this connection, reference is made to the above and to the prior art.
The implant according to FIG. 2 can have a structure corresponding to that of the implant shown in FIG. 1, and the implant can be anchored to dentine in a corresponding way as has been shown for the implant according to FIG. 1. In FIG. 2, the implant is indicated by 9, the spacer sleeve by 10, a dental bridge by 11, a bridge sleeve arranged in the dental bridge by 12, and a fastening screw by 13. The dental bridge can be a dental bridge made of carbon fiber material. However, the invention can also be used for other types of bridge material and, in one embodiment, the bridge sleeve 12 can be replaced by a recess which is arranged directly in the bridge material. The spacer sleeve 10 which is cylindrical has in principle two parts, of which the first part has been indicated by 10 a and the second part by 10 b. The first part 10 a consists of a substantially cylindrical part with full cylinder wall. The second part 10 b is designed with or comprises a number of parts extending adjacent to one another (see also FIG. 4 below). A recessed wall in the bridge part 12 is shown by 12 a. At the top, the bridge sleeve is provided with an internal flange 12 b and the bridge sleeve is also arranged with a recess 12 c at its upper part. The fastening screw can be applied to the spacer sleeve and the implant via said recess 12 c. At the bottom too, the bridge sleeve is provided with a recess 12 d so that the bridge sleeve can be engaged over the portion 10 b of the spacer sleeve and so that the portion 10 b extends into the space 12 e of the bridge sleeve. The total length of the spacer sleeve is indicated by L, and the length of the portion or parts 10 b is indicated by L′. The value or order of L′ is approximately half or slightly less than half of the value or order of the length L. The height of the bridge sleeve is indicated by L″ and a feature of the present embodiment is inter alia that the portion 10 b must extend into the recess 12 e by at least ⅔ of its length L′. The outer surface 10 b′ of the portions is arranged with irregularities or spikes 10 b″. The portion 10 b″ or its parts is/are arranged with inner surfaces 10 b′″ which are designed as parts of truncated cones, which inner surfaces combine to form an internal inner surface designed as a truncated cone. The head 13 a of the screw 13 is provided with an external outer surface 13 b which is designed as a truncated cone and which can be applied against said internal inner surfaces 10 b′″. Half the cone angle of said cone-shaped surfaces is indicated by α and can assume values of around 40� . The material of the spacer sleeve can be hard titanium, for example MGA 007, and the material of the bridge sleeve 12 can be soft titanium, for example MGA 002. The fastening screw 13 is made of gold. In accordance with the concept of the invention, the parts in portion 10 b can be expanded with the aid of the fastening screw 13 when the latter is screwed into the implant via its threaded end 13 c which cooperates with an internal thread 9 a in the implant. The expansion takes place via the truncated cone-shaped inner and outer surfaces of the portion 10 b and the screw 13/head 13 a of the screw. Depending on the degree of screwing of the screw in the internal thread 9 a of the implant, it is possible to achieve an expansion of such an order which brings about cooperation between the outer surface 10 b′ of parts of the portion 10 b and the inner surface 12 a. The different types of material and the angle α are chosen so that a residual expansion function exists in the screwed-in position of the screw 13. The cone-shaped surfaces mean that a residual wedging function can exist. In a gap-shaped space 14 between the inner surface 10 c of the spacer sleeve and the outer surface 13 d of the screw, a thixotropic material in the form of hyaluronic acid is introduced during or before the anchoring. Said agent can also be applied to or in the internal recess 12 e of the bridge sleeve. The upwardly projecting flange of the implant can consist of a hexagon-shaped part which can be included in a function controlling the angle of rotation relative to the implant for the spacer sleeve which surrounds the part 9 b with a lower part 10 d. In FIG. 2, the device for anchoring the dental bridge 11 to implants has been shown for one implant. The dental bridge or equivalent can normally be anchored to two or more implants, and in FIG. 2 the positions of two further implants have been indicated by 16 and 17. The other implants have a structure corresponding to the implant shown in FIG. 2, and this also applies to other components in the overall, construction. One difference may be that the portion 10 b extends into the bridge sleeves by a different length because of the fact that there may be different positions for the longitudinal displacement of the different implants. A gap a is arranged in FIG. 2. This gap takes up any discrepancies in the radial direction between the different anchoring points. In accordance with the present invention, the parts, which form the portion 10 b must be able to be expanded in the radial direction R so that the gap a in question is taken up with the aid of the anchoring function. The device is such that a considerable radial displacement is obtained for the entire outer surface or outer surfaces of the portion 10 b or its parts arranged adjacent to one another. This is intended to obtain a cooperation between the outer surfaces 10 b′ of the parts and the inner surface 12 a along substantial parts of the parts or along the length or height of the portion 10 b. It is also important that the gap a is chosen so that the limit of elasticity is not exceeded or so that breaks do not occur in the parts of portion 10 b which are arranged adjacent to one another. In the illustrative embodiment shown in FIG. 2, the gap a is chosen at ca. 3/10 mm and can be chosen in the range of 2/10 and 4/10 mm. These chosen values give a guarantee of a proper anchoring function.
FIG. 4 is intended to show the expansion function for the parts of the portion 10 b which are arranged adjacent to one another, which parts have been indicated by d, e, f, g, h, i, j. In the function position 21 according to the view D, the parts assume unexpanded positions and the gap a′ is thus present between the outer surface (the combined surface) 10 b″ and the inner surface 12 a of the bridge sleeve 12. In the function stage 22 according to the view E, the expansion by means of the fastening screw in FIG. 2 has been effected, with the result that said parts e�j have come into cooperation with the inner surface 12 a of the bridge sleeve 12 via their outer surfaces, the outer surface of a part e having been indicated by e′. The bearing force can be arranged with relatively high values, and tests have shown that it is possible to achieve bearing pressures of not less than ca. 250 Newton, which must be compared to the fact that the combined bite force of the whole bite is ca. 85 Newton. The gap a according to the view D is thus eliminated in the view E.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5015186 *Jul 26, 1989May 14, 1991Detsch Steven GDental implant attachment systemUS5302125 *Oct 22, 1992Apr 12, 1994Kownacki Charles DDental prosthetic implantUS5328371Oct 15, 1993Jul 12, 1994Friatec AktiengesellschaftDental implantUS5417569Oct 9, 1991May 23, 1995Perisse; JeanMulti-element dental implantUS5516288 *May 29, 1991May 14, 1996Accius B.V.Device and method for attaching a member in replacement of part of a set of teethUS5704936 *Apr 9, 1993Jan 6, 1998EurosurgicalSpinal osteosynthesis deviceUS5885078 *Aug 28, 1997Mar 23, 1999Board Of Regents The University Of Texas SystemMethod for constructing accurately fitting frameworks for endosseous implant-supported dental prosthesesUS6190169 *Dec 10, 1999Feb 20, 2001CENDRES ET M�TAUX SAAnchorage for dental prostheticsUS6902401 *Jan 30, 2001Jun 7, 2005Nobel Biocare AbMethod and arrangement for an implant superstructureUS6942699 *Jul 10, 2002Sep 13, 2005Biomet, Inc.Shoulder prosthesisUS20040063062 *Dec 27, 2001Apr 1, 2004Izidor BrajnovicDevice for determining position* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS20140045145 *Apr 5, 2012Feb 13, 2014Redtenbacher Praezisionsteile Ges.M.B.H.Dental prosthesisEP2223667A1Feb 26, 2009Sep 1, 2010Nobel Biocare Services AGA dental implant, a dental implant kit and a method of connecting a super-structureWO2010097234A1Feb 26, 2010Sep 2, 2010Nobel Biocare Services AgA dental implant, a dental implant kit and a method of securing a dental bridge to the jaw of a patient* Cited by examinerClassifications U.S. Classification433/174, 433/173International ClassificationA61C8/00Cooperative ClassificationA61C8/0048European ClassificationA61C8/00GLegal EventsDateCodeEventDescriptionMay 2, 2012ASAssignmentEffective date: 20100915Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NOBEL BIOCARE AB;REEL/FRAME:028140/0176Owner name: NOBEL BIOCARE SERVICES AG, SWITZERLANDAug 4, 2010FPAYFee paymentYear of fee payment: 4Jun 24, 2004ASAssignmentOwner name: NOBEL BIOCARE AB, SWEDENFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BRAJNOVIC, IZIDOR;REEL/FRAME:016591/0730Effective date: 20040624RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google