DE20022420U1 - Cone-shaped implant with cutting edge - Google Patents

Description

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BOEHMERT & BOEHMERT

LAW FIRM

Boetimert&Boehmcrt · POB 1071 27· D-28071 Bremen

German Patent and Trademark Office
Zweibrückenstrasse 12
80297 Munich

DR.-ING. KARL BOEHMERT. PA (1899-1973) DIPL-INC. ALBERTBOEHMERT,PA(1901-1993) WILHELM J. R STAHLBHlO, Attorney, Bremen DR.-ING. WALTER HOORMANN. PA·. brew» DIPL-PHYS. DR. HEINZCH)DDAR.PA·.Moneten DR-INO ROLAND LIESEGANG. PA·. Monks WOLF-DIETER KUNTZE. Attorney. Brewing. Alicante DIPL-PHYS ROBERTMONZHUBER,Pa(1933-1992) DR. LUDWIG KOUKER, RA. Brenn DR. (CHEM.) ANDREAS WINKLER. PA·. Branen MICHAELA HUTH-DIER]G. RA. Mönchen DIPL-PHYS. DR.MARIONTÖNHARDT,PA·.DOnddorf DR. ANDREAS EBERT-WEIDENFELLER, LAWYER Bremen DIPL-ING. EVALIESEGANG,PA·,Moon» DR. AXEL NORDEMANN, RA. Bolin DIPL-PHYS. DR.DOROTHEEWEBER-BRULS.PA·,Frankfurt DIPL-PHYS. DR.STEFANSCHOHE.PA·,Some DR.-ING. MATTHIAS PHILIPP, PA·, Bielefeld DR. JAN BERND NORDEMANN, LLM, RA. Berti«

PA - PfllentanwaWPatent Attorney RA - Rechtsanwalt/Attoraey at Law •-European Patent Attorney

Go to the V«in*uni wr the Eunipliid»! Mutcaana, Alksrtc k Ofike. AüaKc PROF. DR. WILHELM NORDEMANN. RA. Brandenburg, DIPL-PHYS. EDUARD BAUMANN, PA·. Hohenldithen DR.-ING. GERALD KLÖPSCH. PA·, o DIPL-ING. HANS W. GROENTNG.PA·. DIPL-ING. SIEGFRIED SCHIRMER,PA·,Bielefeld DIPL-PHYS. LORENZHANEWINKEL,PA·,PadeAom DIPL-ING. DR. JAN TONNTES, PA. RA. Kid DIPL-PHYS. CHRISTIANBIEHL. PA·,Kid MARTIN WIRTZ, RA. Dbieldorf DR. DETMAR SCHAFER. RA. Bremen DIPL-PHYS. DR.-INO. UWE MANASSE,PA·.Brenxx DR. CHRISTIAN CZYCHOWSKL RA. Berlin DR. CARL-RICHARD HAARMANN. RA. Munich DIPL-BIOL. DR. ARMINK. BOHMANN,PA.MlMcto DIPL-PHYS. DR. THOMAS L. BITTNER, PA· Berlin DR. VOLKER SCHMITZ, RA, Monehe. DR. FRIEDRICH NICOLAUS HEISE, RA, Poudam DIPL-PHYS. CHRISTIAN APPELT.PA,Moncben

In collaboration with coopentioa with DIPL-CHEM. DR. HANS ULRICH MAY, PA·. Mönchen

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K30017(M)

Bremen,

June 1, 2001

IMZ Manufacturing and Sales Company for Dental Technology mbH

Talstrasse 23
D-70794 Filderstadt

Conical implant with cutting edge

The invention relates to an endosseous implant for a fixed dental prosthesis according to the preamble of claim 1.

In previously known implants with a self-tapping thread, the thread was continuous and ran without interruption over the entire surface of the corresponding area. Although these implants have proven to be effective in practice, compression of the bone can occur when the implant is inserted.

Hollerallee 32 ■ D-28209 Bremen · POB. 10 71 27 ■ D-28071 Bremen · Telephone+49^*21-34090 · Fax+49-421-3491768

MUNICH - BREMEN - BERLIN - DÜSSELDORF -f !{«fKFURT- BJELJFEIJD* POTSDAM * B*RAI«>Ef5B«RG*- KK[J- PADERBORN- H*(4lENK.IRCHEN - ALICANTE

tittf>://*nw.boehmert.de· ·· ···· e-mail: pos!ma6iar@De»limert*oe·* ···

It is the object of the invention to provide an implant according to the preamble of claim 1, which avoids such compression of the bone.

This object is achieved according to the invention by an endosseous single tooth implant according to claim 1. Advantageous embodiments are specified in the subclaims.

The implant according to the invention can be designed in particular in accordance with German patent 195 34 979, German patent 198 15 719, German patent application 198 28 461.6 and/or German patent application 198 29 504.9, to which reference is made by way of reference.

The invention is explained in more detail below with reference to the accompanying drawings.

Fig. 1 shows a perspective view of an implant according to the invention,

Fig. 2 shows a side view of an implant according to the invention.

The implant shown in Fig. 1 and 2 is provided with a self-tapping thread 1 on its outside and has a conical section 2 on its cervical, i.e. root-side end, in which the core diameter of the implant, i.e. the diameter at the base of the thread, widens. This section is followed in the coronal direction by a cylindrical section 3 in which the core diameter of the implant remains the same. This cylindrical section 3 is followed in the coronal direction by a connecting section 5 which, as can be seen from Fig. 1, has form-locking elements 7 for holding an attachment to the denture in a rotationally secured manner.

The cylindrical section 3 and the conical section 1 are blasted and etched, but can also be treated in other ways that are common for dental implants. The

self-tapping thread 1 extends over the entire area of the cylindrical section 3 and part of the conical section 2.

As can be seen from Fig. 1, a groove 11 is milled into the outer surface of the implant, which interrupts the thread and extends slightly, about 1/10 mm, into the core diameter of the implant, i.e. the diameter at the base of the thread. The cutting edge thus formed runs parallel to the central axis of the implant in the conical area and continues in the cylindrical area until at least one thread flank is cut.

When the implant is inserted, the cylindrical part 3 is first inserted and cuts the thread contour into the bone until, when the corresponding depth is reached, the conical area 2 also comes into engagement. In this way, compression of the bone is avoided. Numerous modifications to the embodiment shown are conceivable. According to the invention, for example, several cutting edges can be provided. For example, three cutting edges offset by 120° can be provided, although four or more such cutting edges are also conceivable.

The groove 11 does not necessarily have to follow a straight line, but can also follow a helical line.

The features of the invention disclosed in the foregoing description, the claims and the drawings may be essential for the realization of the invention in its various embodiments both individually and in any combination.

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Claims (10)

1. Endosseous single tooth implant for a fixed tooth insert, with a base body with a blind bore open to its coronal end, an attachment engaging therein in a form-fitting manner and secured against rotation, the essentially cylindrical cervical connection area of which essentially corresponds in outer diameter to an essentially cylindrical coronal front edge area of the base body, wherein the peripheral surface of the connection area and the front edge area adjoin one another essentially seamlessly and smoothly and wherein the attachment has a cervical centering collar which can be inserted into a hollow cylindrical ring recess provided at the coronal end of the base body, and a shoulder arranged further coronally than the centering collar and which can be placed on the coronal front edge of the base body, wherein a connecting device for connecting the attachment to the base body in a form-fitting manner is formed in that the ring recess has at least one base body form-fitting element effective in the circumferential direction in a form-fitting area and the centering collar has at least has an add-on form-locking element complementary to the base body form-locking element(s), a centering area of the ring recess is arranged further cervically than the form-locking area, (a) circumferential guide surface(s) of the form-locking area closest to the longitudinal center axis of the ring recess lies/lie on a cylinder surface whose diameter is larger than that of the centering area, the add-on form-locking element(s) is/are provided further cervically than the shoulder on the cylindrical outer wall of the centering collar in a form-locking section thereof, the circumferential surface(s) of the form-locking section radially closest to the longitudinal center axis of the centering collar lies/lie on a cylinder surface whose diameter essentially corresponds to that of the cylinder surface on which the circumferential guide surface(s) of the form-locking area closest to the longitudinal center axis of the ring recess lies/lie, and further cervically than the form-locking section a cylindrical centering section is arranged, the outer diameter of which essentially corresponds to the inner diameter of the centering region, the implant having a section ( 2 , 3 ) for insertion into the bone, which has a larger diameter at its coronal end than at its cervical end, at least a part of this section being provided with a self-tapping thread ( 1 ) on its outside, characterized in that the thread ( 1 ) is interrupted at least in a partial area by a groove ( 11 ), so that a cutting edge is formed. 2. Implant according to claim 1, characterized in that it has a cylindrical section ( 3 ), wherein in a more cervical section ( 2 ) the core diameter is smaller than in the cylindrical section ( 3 ). 3. Implant according to claim 2, characterized in that the cylindrical portion ( 3 ) is provided with a self-tapping external thread ( 1 ) and the groove ( 11 ) extends into this cylindrical portion ( 3 ) at least so far that at least one thread flank is cut. 4. Implant according to claim 2 or 3, characterized in that a conical section ( 2 ) adjoins the cylindrical section ( 3 ). 5. Implant according to claim 4, characterized in that the conical section ( 1 ) is provided with a self-tapping external thread ( 1 ) and the groove ( 11 ) at least partially penetrates the external thread ( 1 ) in this region ( 2 ) and extends into the cylindrical region ( 3 ). 6. Implant according to one of claims 2 to 5, characterized in that a conical section adjoins the cylindrical section in the cervical direction and a second, cylindrical section adjoins this conical section in the cervical direction, the core diameter of this second cylindrical section being smaller than that of the first cylindrical section. 7. Implant according to one of claims 1 to 6, characterized in that the groove ( 11 ) is straight and lies in a plane which is spanned by the longitudinal axis of the implant and a straight line perpendicular to the longitudinal axis through the center of the implant. 8. Implant according to one of claims 1 to 7, characterized in that the groove ( 11 ) has the shape of a helical line. 9. Implant according to one of claims 1 to 8, characterized in that on the circumference of the implant several grooves which interrupt the thread ( 1 ) are arranged offset in the circumferential direction. 10. Implant according to claim 9, characterized in that the grooves ( 11 ) are arranged at equal angular intervals.