Source: http://www.google.com/patents/US5667384?dq=6,606,102
Timestamp: 2014-12-25 04:44:13
Document Index: 378897128

Matched Legal Cases: ['art. 2', 'art.\n6', 'art. 14', 'art. 21', 'art 6', 'art 7', 'arts 4', 'art 7', 'art 6', 'art 7', 'art 6', 'art 7', 'art 7', 'art 7']

Patent US5667384 - Device for forming a dental prosthesis and method of manufacturing such a device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThe device (1) for forming a dental prosthesis has at least one support (3) with a base (4) which in the use of the device (1) is inserted into a jawbone (13) of a patient or into a jaw model. The support (3) has a conical bearing surface (4n) and also a shoulder (7e) which faces the base (4) and for...http://www.google.com/patents/US5667384?utm_source=gb-gplus-sharePatent US5667384 - Device for forming a dental prosthesis and method of manufacturing such a deviceAdvanced Patent SearchPublication numberUS5667384 APublication typeGrantApplication numberUS 08/442,944Publication dateSep 16, 1997Filing dateMay 17, 1995Priority dateJun 3, 1994Fee statusLapsedAlso published asDE59506666D1, EP0685208A1, EP0685208B1Publication number08442944, 442944, US 5667384 A, US 5667384A, US-A-5667384, US5667384 A, US5667384AInventorsFranz Sutter, Vincenzo Grande, Francis J. SutterOriginal AssigneeInstitut Straumann AgExport CitationBiBTeX, EndNote, RefManPatent Citations (11), Referenced by (43), Classifications (5), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetDevice for forming a dental prosthesis and method of manufacturing such a deviceUS 5667384 AAbstract The device (1) for forming a dental prosthesis has at least one support (3) with a base (4) which in the use of the device (1) is inserted into a jawbone (13) of a patient or into a jaw model. The support (3) has a conical bearing surface (4n) and also a shoulder (7e) which faces the base (4) and for example is formed by a flank of an annular groove (7d). The device (1) has for the or each support (3) a cap (8) which bears with a conical countersurface (8f) on the conical bearing surface (4n) of the support (44) when the device (1) has been assembled. The cap (8) has a hole (8k) with an internal thread (8m) and with an axis (11) which forms an angle with the axis (10) of the two conical surfaces (4n, 8f). A screw (9) screwed into the hole (8k) engages with a tapering end section (9b) on the outer border (7f) of the shoulder (7e) and thus presses the countersurface (8f) against the bearing surface (4n). The end section (8b) of the cap (8) facing away from the base (4) is hole-free and therefore makes possible favourable and aesthetic shaping of the cap (8).
We claim: 1. A device for forming a dental prothesis comprising:a cap defining an inner space; a support for supporting the cap, the cap and the support having a common, first axis; and a screw for fastening the cap on the support, wherein the support has an inner end for being inserted in a jawbone of a dental prothesis user, and an outer part to be located outside of the jawbone for supporting the cap, the outer part having a bearing surface cooperating with a counter bearing surface of the cap in an assembled condition of the device, wherein the cap has a threaded hole for receiving the fastening screw and opening into the inner space, the hole having a second axis extending at an angle to the first axis, and wherein the screw has a tapering end section extending, at least partially, into the inner space and engaging a shoulder, which is provided on the outer part and faces the inner part, for generating a pressure force for pressing the counter bearing surface of the cap against the bearing surface of the outer part. 2. A device according to claim 1, wherein the shoulder is annular and extends along a circumference of the outer part.
6. A device according to claim 1, wherein the second axis extends outwardly of the support and forms with the first axis an angle between 30� and 90�.
8. A device according to claim 1 wherein the support includes:an elongate one-piece base having a first end defining the inner end of the support, an outer end opposite the inner end, and a hole formed in the outer end and having a section with an inner thread; and a holder having a inner portion receivable in the base hole and provided with an outer thread cooperating with the inner thread of the base hole, and an outer portion for projecting from the base hole. 9. A device according to claim 8, wherein the base hole has a conical section with an outwardly inclined conical surface extending between the section with an inner thread and a mouth of the hole, and the holder has a conical surface bearing against the conical surface of the base hole.
13. A device according to claim 10, wherein the base has conical annular surface surrounding a mouth of the base hole and inclined outwardly relative to the first end;wherein the holder comprises a second part having a conical annular surface for bearing against the conical annular surface of the base, an annular groove defining the outer part shoulder, and an axial hole; and wherein the device further comprises a screw extendable through the axial bore of the second part and receivable in the axial threaded bore of the first part for connecting the second part with the first part. 14. A device according to claim 9, wherein the base has a conical annular surface surrounding a mouth of the base hole and inclined outwardly relative to the first end; wherein the holder includes a first, one-piece part defining the inner and outer portions of the holder, the outer portion having an annular groove defining the outer part shoulder, a conical annular surface for bearing against the conical annular surface of the base, and a conical outer surface tapering away from the inner portion and forming a smaller angle with the first axis than the conical annular surface thereof; and wherein the holder further includes a second part formed as a sleeve having a conical surface defining the conical surface of the holder bearing against the conical surface of the base hole, and an axial hole having an internal thread, the outer thread of the inner portion cooperating with the internal thread of the sleeve axial hole when the inner portion is received in the base hole.
20. A method of manufacturing a device for forming a dental prothesis, comprising the steps of:providing a cap defining an inner space; providing a support for supporting the cap; and providing a screw for fastening the cap on the support, wherein the support providing step includes providing a support having an inner end for being inserted in a jawbone of a dental prothesis user, and an outer part to be located outside of the jawbone for supporting the cap and having a bearing surface for cooperating with a counter bearing surface of the cap in an assembled condition of the device, wherein the cap providing step includes providing a cap having a threaded hole for receiving the fastening screw and opening into the inner space and defining a second axis extending at an angle to a first, common axis of the support and the cap; and wherein the screw providing step includes providing a screw having a tapering end section for extending, at least partially, into the inner space and for engaging a shoulder, which is provided on the outer part and faces the inner part, for generating a pressure force for pressing the counter bearing surface of the cap against the bearing surface of the outer part. 21. A method according to claim 20, wherein the cap providing step include manufacturing the cap from titanium.
23. A method according to claim 20, wherein the cap providing step includes the steps of:forming a sleeve of a burnable material; providing a metal bushing having an axial threaded bore and fastening the bushing on the sleeve to form a cap, with the threaded bore forming the threaded hole of the cap; applying a burnable modelling material on the outside of the cap; forming a casting mold surrounding the cap and filling an inner space of the sleeve; burning the sleeve and the burnable material applied on the outside of the cap, whereby a hollow inner space is formed in the mold; and filling the hollow inner space of the mold with a casting material for producing a cast cap, with the bushing being mounted in the cap. Description
BACKGROUND OF THE INVENTION The invention relates to a device for forming a dental prosthesis.
SUMMARY OF THE INVENTION The aim of the invention is achieved by providing a device for forming a dental prothesis in which the secondary part has a shoulder which faces the end of the support at least when the device has been assembled, the hole of the cap has an internal thread, the screw axis forms an angle with the axis of the device, and the screw has an end section tapering away from its thread and, when the cap is arranged on the secondary part, can be screwed into the internal thread of the cap in such a manner that the end section of the screw engages on the shoulder, and thus generates a force pressing the countersurface of the cap against the bearing surface of the support.
BRIEF DESCRIPTION OF THE DRAWINGS The subject of the invention is explained below with reference to exemplary embodiments illustrated in the drawing, in which
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The device which is shown in FIG. 1 in dismantled state and in FIG. 4 in the assembled end state and is designated as a whole by 1 serves for fastening and forming a dental prosthesis, namely a single artificial tooth. The device 1 has a support 3 with a base 4, frequently also designated as primary part or implant, and a holder 5 which consists of a secondary part 6 and a tertiary part 7. The device 1 also has a cap 8 which, with the aid of a screw 9, can be connected rigidly and detachably to the support 3. The three parts 4, 6, 7 of the support 3 and the cap 8 define in the assembled state a common, first axis 10.
The elongate, one-piece base 4 has a first end 4a which is situated at the bottom in FIG. 1, and, facing away from this, a second end 4b. The shell surface of the base has a generally cylindrical main section 4c with an external thread 4d and an end section 4e which widens in a trumpet-shaped manner towards the second end 4b. The base has two axial blind holes, namely one hole 4f opening into its first end 4a and one hole 4g opening into its second end 4b. The hole 4g has a cylindrical section 4h with an internal thread 4i and, widening from this towards the second end 4b of the base 4, a section 4k with a cone surface 4m. This forms with the axis 10 an angle amounting to 5� to 15� and for example approximately 8�. The base has at its second end 4b a conical annular surface 4n which surrounds the mouth of the hole 4g and the axis 10 completely and continuously, is rotationally symmetrical in relation to the axis 10, is inclined outwards towards the first end 4a of the base and forms with the axis 10 an angle of approximately or exactly 45�. As will be explained in greater detail, the conical annular surface 4n also serves, in the variant embodiment of the device drawn in FIG. 1, as a bearing surface 4n for the cap 8. Furthermore, the base also has some radial holes 4p which open into the axial hole 4f.
The one-piece cap 8, which is also shown separately in FIG. 2, has a shell 8a and a compact, apical end section 8b which is hole-free in particular in the region of the axis 10 and faces away from the base 4 when the device 1 has been assembled. The cap 8 is generally rotationally symmetrical in relation to the axis 10 but has a nose 8c which projects to the right in FIGS. 1, 2 and 4. The cap 8 has an inner surface 8d which delimits an inner space 8e which is generally rotationally symmetrical in relation to the axis 10 and open towards the base 4. The section of the inner surface 8d adjoining the mouth of the inner space 8e forms a conical countersurface 8f which is inclined away from the mouth towards the axis 10, surrounds the axis 10 completely and continuously, forms with this the same angle as the annular and/or bearing surface 4n of the base 4 and bears against the conical annular and/or bearing surface 4n when the device has been assembled. The two conical surfaces 4n and 8f have external diameters of the same size so that the outer and/or shell surfaces of the base 4 and of the cap 8 abut at the outer borders of the conical surfaces 4n and 8f when the device 1 has been assembled. The inner surface 8d has, on the side of the countersurface 8f facing away from the mouth of the inner space 8e, a polygonal inner surface region 8g which is non-rotationally symmetrical in relation to the axis 10 and for example 24-cornered in cross-section. This region therefore has several, namely 24, plane, non-rotationally symmetrical surface sections parallel to the axis 10 and 24 corners or edges parallel to the axis 10. In FIG. 2, the outline of the head 6d is also indicated in dot-dash lines. This is designed in such a manner that the corners of its octagonal section 6e engage snugly or with at most small radial play in corners of the 24-cornered inner surface region 8g. The inner surface 8d has, above the 24-cornered inner surface region 8g, a cylindrical inner surface section 8h, which is adjoined by a likewise cylindrical, slightly narrower inner surface section 8i. The diameter of the latter is at most slightly greater than the diameter of the head 7c of the tertiary part 7. When the cap 8 is pushed onto the support 3 parallel to the axis 10 during assembly of the device 1, it is guided axially displaceably and radially at least approximately without play by the heads 6d and 7c of the secondary part 6 and tertiary part 7 respectively. The surface sections and the edges of the circumferential surface 6f which is non-rotationally symmetrical in relation to the axis 10 and of the inner surface region 8g form in addition securing means which secure the cap 8 against rotations with regard to the secondary part 6 of the support 3 when the device has been assembled. When the device 1 has been assembled, according to FIG. 4, an interspace is present between the end surface of the head 7c of the tertiary part 7 and the inner surface section of the cap 8 delimiting the upper end of the inner space 8e. The cap 8 has a hole 8k which extends through the nose 8c into the inner space 8e and the outer mouth of which lies in a surface of the nose 8c which is inclined in relation to the axis 10 and the inner mouth of which lies mainly in the region of the cylindrical inner surface section 8h of the cap. The hole 8k is provided with an internal thread 8m. The hole 8k surrounds and defines a second axis 11. The hole 8k and the section of the axis 11 situated in it are inclined away upwards from the axis 10 and thus away from the base 4. The second axis 11 forms with the first axis 10 an angle which amounts to at least 30�, preferably at least 45�, less than 90�, for example 55� to 85� and namely according to FIGS. 1, 4 approximately 65�. The hole 8k and the screw 9 screwed into it when the device 1 has been assembled are thus to a greater or lesser extent transverse to the axis 10.
The screw 9 has a thread 9a and, tapering away from this, a for example approximately frustoconical end section 9b. The conical surface of the latter forms with the screw axis, which coincides with the axis 11 of the hole 8i when the device 1 has been assembled, an angle which amounts to at most 60�, preferably at most 45� and for example approximately 30�. The screw 9 is designed as a headless screw and thus has no head so that the nominal or external diameter of its thread 9a forms the maximum diameter of the screw 9. This has, at its end facing away from the end section 9b, a hole 9c which has a polygonal, for example hexagonal, section, the surfaces and edges of which form driving means for a screwing-in tool. The nominal or external diameter of the thread 9a amounts preferably to at least 1.5 mm and for example approximately or exactly 2 mm. The overall length of the screw 9 is at most three times and for example approximately twice the size of the nominal or external diameter of the thread 9a.
When the device 1 has been assembled, the screw 9 is according to FIG. 4 screwed into the hole 8k of the cap 8 in such a manner that the conical surface of the end section 9b of the screw 9 engages on the outer border 7f of the shoulder 7e of the tertiary part 7. At its point touching the shoulder 7e, the conical surface of the screw 9 forms with the axis 10 an angle which amounts to preferably at least 30�, preferably at most 60� and for example according to FIG. 4 approximately 35�. When the screw 9 has been screwed in firmly, the shoulder 7e of the tertiary part 7 exerts a force on the screw and via this on the cap 8. This force has a component which is parallel to the axis 10 and which presses the countersurface 8f of the cap 8 against the bearing surface 4n of the base 4 and clamps the cap 8 firmly on the support 3. The screw 9 is situated completely inside the cap 8 when the device 1 has been assembled and finished.
The common axis 11 of the bushing 50 and screw 9 can, with the axis 10 of the handling support 43 and also the cap 48 or of the support 3 and also the cap 58, form an angle which is somewhat greater than the angle formed by the axes 10 and 11 in the devices 1 and 21 and for example amounts to approximately 80�. The conical surface of the screw 9, at its point touching the shoulder 7e of the handling support 43 or of the support 3 fastened in the jawbone 13, forms with the axis 10 an angle which amounts to at least 45� and for example approximately 55�.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4044467 *Jun 28, 1976Aug 30, 1977Linkow Leonard ISymphyseal-rami edosteal implantUS4396054 *Feb 2, 1981Aug 2, 1983Steve ColeMethod for making a distortion-free multiple unit prosthesisUS5116225 *Mar 13, 1991May 26, 1992Riera Juan C AAngulated abutment for osseointegrated implantsUS5221204 *Sep 23, 1991Jun 22, 1993Kruger Bernard MDental implant product and method of makingUS5234339 *Dec 24, 1991Aug 10, 1993Kulzer, Inc.Implant supported prosthesisUS5421722 *Jun 11, 1993Jun 6, 1995Stemmann; HartmutMagnet arrangement for a prosthesisUS5429505 *Feb 8, 1994Jul 4, 1995Clinique Dentaire Fortin Et Vallee Inc.Teeth prosthesis and method for mounting and removing a suprastructure thereofUS5431695 *Nov 23, 1993Jul 11, 1995Medtronic, Inc.PacemakerUS5439380 *Mar 7, 1994Aug 8, 1995Marlin; Gerald M.Method of forming an abutment postFR2029346A1 * Title not availableFR2429587A1 * Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS5888218 *Mar 27, 1997Mar 30, 1999Folsom Metal ProductsImplant micro sealUS5915968 *Aug 9, 1996Jun 29, 1999Imz Fertigungs-Und Vertriebsgesellschaft Fur Dentale Technologie MbhEnossal single tooth implantUS5989029 *Oct 29, 1997Nov 23, 1999Atlantis Components, Inc.Customized dental abutments and methods of preparing or selecting the sameUS5997299 *Mar 17, 1997Dec 7, 1999Unger; Heinz-DieterAnchor for dental implants and device for the alignment of the anchorUS6012923 *Jul 30, 1998Jan 11, 2000Sulzer Calcitek Inc.Two-piece dental abutment with removable cuffUS6159010 *Apr 20, 1999Dec 12, 2000Implant Innovations, Inc.Fenestrated dental copingUS6171106 *Sep 9, 1999Jan 9, 2001Gc CorporationCover screw for dental implantUS6227859 *May 18, 1998May 8, 2001Franz SutterDental implant and device with a dental implantUS6231342Oct 8, 1999May 15, 2001Atlantis Components, Inc.Customized dental abutments and methods of preparing or selecting the sameUS6250922Oct 29, 1999Jun 26, 2001Sulzer Dental Inc.Two-piece dental abutment with removable cuffUS6287115Nov 17, 1998Sep 11, 2001L. Paul LustigDental implant and tool and method for effecting a dental restoration using the sameUS6572373 *Dec 26, 2000Jun 3, 2003Silvano Umberto TramonteDental endosseous implantUS6672871Jun 15, 2001Jan 6, 2004Nobel Biocare AbCoping with standoffsUS6726480May 18, 1998Apr 27, 2004Straumann Holding AgSupport for sustaining and/or forming a dental prosthesisUS6733292 *Apr 15, 2002May 11, 2004Park Avenue Periodontal Associates, P.C.Universal implantUS6786725Sep 12, 2001Sep 7, 2004L. Paul LustigDental implant and tool and method for effecting a dental restoration using the sameUS6884073Jul 9, 2002Apr 26, 2005Richard H. ChilibeckTemporary and semi-permanent dental crownsUS6991461 *Dec 28, 2001Jan 31, 2006Gittleman Neal BExpandable dental implant apparatusUS7670142 *Apr 24, 2007Mar 2, 2010Intra-Lock International, Inc.Prosthesis mounting device and assemblyUS7708559 *May 14, 2004May 4, 2010Nobel Biocare Services AgDental implant systemUS7780447Apr 19, 2006Aug 24, 2010Nobel Biocare Services AgDental implant systemUS7845945Jan 12, 2005Dec 7, 2010Stanton R. CanterAnchoring element for use in boneUS8128402Mar 3, 2005Mar 6, 2012Nobel Biocare Services, AgTubular bone anchoring elementUS8348668Sep 24, 2009Jan 8, 2013Simply Dental AbDental implant, and superstructure thereforeUS8408904May 23, 2006Apr 2, 2013Straumann Holding AgCoupling for a multi-part dental implant systemUS8485819 *Aug 4, 2011Jul 16, 2013Perioseal, Inc.Dental implantUS20110287383 *Aug 4, 2011Nov 24, 2011Callan Donald PDental implantUS20120296612 *May 18, 2012Nov 22, 2012Straumann Holding AgComputer-implemented method for digitally shortening of a cap of a dental bridge and a computer-readable mediumUS20140147812 *Jul 13, 2011May 29, 2014Zimmer Dental, Inc.Dental implant and abutment systemUSRE42391Feb 12, 2003May 24, 2011Woehrle Peter SBioroot endosseous implantDE102004044888B4 *Sep 14, 2004Aug 26, 2010Bredent Dentalger�te u. Materialien Fach- u. Organisationsberatung Peter BrehmAufbauelement f�r ein DentalimplantatEP0923909A1 *Dec 16, 1998Jun 23, 1999C. HAFNER GmbH &amp; Co.Dental implantEP0923910A1 *Dec 16, 1998Jun 23, 1999C. HAFNER GmbH &amp; Co.Dental implantEP1093766A1 *Oct 20, 1999Apr 25, 2001Abou Tara, Nicolas, Prof.Dr. Dr.med.dent.Screw-type self-tapping dental implant for attaching a superconstructionEP1728486A1 *Jun 3, 2005Dec 6, 2006Straumann Holding AGCoupling for a multi-part dental implant systemEP2119414A1 *Jun 3, 2005Nov 18, 2009Straumann Holding AGCoupling for a multi-part dental implant systemEP2346435A1 *Sep 24, 2009Jul 27, 2011Simply Dental ABDental implant, and superstructure thereforeWO2001097706A1 *Jun 18, 2001Dec 27, 2001Steven M HursonCoping with standoffsWO2003088868A2 *Apr 12, 2003Oct 30, 2003Park Avenue Periodontal AssociUniversal implantWO2006128620A2 *May 23, 2006Dec 7, 2006Straumann Holding AgCoupling for a multi-part dental implant systemWO2010036197A1 *Sep 24, 2009Apr 1, 2010Simply Dental AbDental implant, and superstructure thereforeWO2010100163A2 *Mar 2, 2010Sep 10, 2010Tiziano TealdoSuperstructure for a dental prosthesis system and corresponding fabrication methodWO2012065848A1 *Nov 3, 2011May 24, 2012Bredent Gmbh & Co. KgConnecting system for dental prostheses* Cited by examinerClassifications U.S. Classification433/172, 433/173International ClassificationA61C8/00Cooperative ClassificationA61C8/0048European ClassificationA61C8/00GLegal EventsDateCodeEventDescriptionNov 15, 2005FPExpired due to failure to pay maintenance feeEffective date: 20050916Sep 16, 2005LAPSLapse for failure to pay maintenance feesApr 6, 2005REMIMaintenance fee reminder mailedNov 24, 2000FPAYFee paymentYear of fee payment: 4May 17, 1995ASAssignmentOwner name: INSTITUT STRAUMANN AG, SWITZERLANDFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SUTTER, FRANZ;GRANDE, VINCENZO;SUTTER, FRANCIS J.;REEL/FRAME:007515/0950Effective date: 19950407RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google