DENTAL IMPLANT SYSTEM WITH AT LEAST ONE TOOTH IMPLANT AND SEPARATE ABUTMENT

Abstract

A dental implant system, comprising: a tooth implant, and a separate abutment that is attachable or attached at the tooth implant by an attachment bolt, wherein the tooth implant is made from a first material with an elasticity modulus between 15 GPa and 75 GPa, wherein the abutment is made from a second material with an elasticity modulus greater than 100 GPa, and wherein the attachment bolt is made from the first material or the second material.

Claims

1. A dental implant system, comprising: a tooth implant, and a separate abutment that is attachable or attached at the tooth implant by an attachment bolt, wherein the tooth implant is made from a first material with an elasticity modulus between 15 GPa and 75 GPa, wherein the abutment is made from a second material with an elasticity modulus greater than 100 GPa, and wherein the attachment bolt is made from the first material or the second material.

2. The dental implant system according to claim 1, wherein the tooth implant 1 is made from a beta titanium alloy at least at a surface of the tooth implant.

3. The dental implant system according to claim 2, wherein the beta titanium alloy is nano-structured.

4. The dental implant system according to claim 1, wherein the abutment 2 is made from cP-titanium.

5. The dental implant system according to claim 4, wherein the cP-titanium is nano-structured.

6. The dental implant system according to claim 1, the tooth implant including: an insertion section including a screw thread or a nail thread configured to fix the tooth implant in a jawbone, a coronal protrusion configured to provide an external connection of the tooth implant with the abutment, or an internal recess configured to provide an internal connection of the tooth implant with the abutment, wherein the abutment is attachable or attached at the tooth implant by the external connection or by the internal connection.

7. The dental implant system according to claim 6, wherein the attachment bolt is threadable into an opening that is formed at least in the coronal protrusion when the external connection is provided between the abutment and the tooth implant, or wherein the attachment bolt is threadable into an opening that is formed in the recess when the internal connection between the abutment and the tooth implant is provided.

8. A dental implant system comprising a tooth implant, and a separate abutment which is attachable or attached at the tooth implant by an attachment bolt, wherein the tooth implant is made from titanium or a titanium alloy that is nano-structured at least at a surface of the tooth implant.

9. The dental implant system according to claim 7, wherein the abutment is made from titanium or a titanium alloy which is nano-structured.

10. A dental implant system, comprising: a separate abutment, a tooth implant where the abutment is attachable or attached by an attachment bolt, the tooth implant including: an insertion section configured to anchor the tooth implant in a jawbone and provided with a screw thread or a nail thread, a multi-functional section that is adjacent to the insertion section in a coronal direction, and that includes a first cone that tapers in the coronal direction, an attachment section that is adjacent to the multi-functional section in the coronal direction and that includes a second cone that tapers in the coronal direction and that is directly coaxially adjacent to the first cone, wherein the second cone is configured as a coronal protrusion, wherein an external cone connection is provided at least between the second cone and the abutment, and wherein the first cone and the second cone have an identical cone angle and are defined by a common smooth enveloping surface.

11. The dental implant system according to claim 10, wherein the abutment 2 is replacable by an axially longer replacement abutment which extends in an axial direction of the tooth implant axis in an apex direction beyond the second cone into the first cone.

12. The dental implant system according to claim 11, wherein the replacement abutment contacts the tooth implant at least along a portion of the axial extension of the second cone and additionally at least along a portion of the axial extension of the first cone.

13. The dental implant system according to claim 10, wherein the insertion section tapers conically towards an apex end of the tooth implant.

14. The dental implant system according to claim 1, wherein the tooth implant is made from titanium or a titanium alloy that is nano-structured at least at a surface of the tooth implant.

15. The dental implant system according to claim 1, the tooth implant including: an insertion section configured to anchor the tooth implant in a jawbone and provided with a screw thread or a nail thread, a multi-functional section that is adjacent to the insertion section in a coronal direction, and that includes a first cone that tapers in the coronal direction, an attachment section that is adjacent to the multi-functional section in the coronal direction and that includes a second cone that tapers in the coronal direction and that is directly coaxially adjacent to the first cone, wherein the second cone is configured as a coronal protrusion, wherein an external cone connection is provided at least between the second cone and the abutment, and wherein the first cone and the second cone have an identical cone angle and are defined by a common smooth enveloping surface.

16. The dental implant system according to claim 8, the tooth implant including: an insertion section configured to anchor the tooth implant in a jawbone and provided with a screw thread or a nail thread, a multi-functional section that is adjacent to the insertion section in a coronal direction, and that includes a first cone that tapers in the coronal direction, an attachment section that is adjacent to the multi-functional section in the coronal direction and that includes a second cone that tapers in the coronal direction and that is directly coaxially adjacent to the first cone, wherein the second cone is configured as a coronal protrusion, wherein an external cone connection is provided at least between the second cone and the abutment, and wherein the first cone and the second cone have an identical cone angle and are defined by a common smooth enveloping surface.

17. The dental implant system according to claim 1, the tooth implant including: an insertion section configured to anchor the tooth implant in a jawbone and provided with a screw thread or a nail thread, a multi-functional section that is adjacent to the insertion section in a coronal direction, and that includes a first cone that tapers in the coronal direction, an attachment section that is adjacent to the multi-functional section in the coronal direction and that includes a second cone that tapers in the coronal direction and that is directly coaxially adjacent to the first cone, wherein the second cone is configured as a coronal protrusion, wherein an external cone connection is provided at least between the second cone and the abutment, wherein the first cone and the second cone have an identical cone angle and are defined by a common smooth enveloping surface, and wherein the tooth implant is made from titanium or a titanium alloy that is nano-structured at least at a surface of the tooth implant.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The invention is subsequently described based on an embodiment with reference to an appended drawing figure, wherein:

[0042] FIG. 1 illustrates a side view of a dental implant system according to and advantageous embodiment of the invention, comprising a tooth implant, an attachment bolt and an abutment;

[0043] FIG. 2 illustrates a longitudinal sectional view of the dental implant system along the line II-II of FIG. 1;

[0044] FIG. 3 illustrates an individual sectional view of the abutment of the dental implant system according to FIG. 1; and

[0045] FIG. 4 illustrates a sectional view of the tooth implant of the dental implant system according to FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION

[0046] The dental implant system illustrated in FIG. 1 includes a tooth implant 1, a separate abutment 2 and an attachment screw 3 that attaches the abutment 2 at the tooth implant 1.

[0047] As evident from FIG. 2 the tooth implant 1 includes an insertion section 1a for anchoring the tooth implant 1 in a jaw bone that is provided with a screw thread or a nail thread Y, a multi-functional section 1b that is adjacent to the insertion section 1a in a coronal direction and an attachment section 1c that is adjacent to the multi-functional section 1b in a coronal direction.

[0048] The multi-functional section 1b includes a first cone 7 that tapers in a coronal direction from an end of the insertion section 1a while the attachment section 1c includes a second cone 6 that tapers in the coronal direction and that is directly adjacent to the first cone 7 wherein the second cone 6 forms a coronal protrusion of the tooth implant 1.

[0049] An external cone connection is provided at least between the second cone 6 and the abutment 2. Thus, an inner pass through opening 8 of the abutment 2 includes an inner cone 9 which is configured complementary to the second cone 6 of the tooth implant 1 with respect to the cone angle. Thus, the inner cone 9 is then arranged at an apex end of the abutment 2 so that the abutment 2 can be placed on the second cone 6 from the coronal side.

[0050] As illustrated in particular in FIG. 3 the pass through opening 8 of the abutment 2 includes a collar 10 at the coronal end of the inner cone 9 wherein the collar 10 extends e.g. in the apex direction with a bevel or at a slant angle in the cross sectional view, c.f. FIG. 3, wherein the collar 10 is complementary to a coronal annular edge surface 14 of a central threaded dead hole 13 in the tooth implant 1 (FIG. 2 and FIG. 4). Thus, when the abutment 2 is placed onto the second cone 6 of the tooth implant with the inner collar 10 (FIG. 2) a centering form locking internal connection X is provided between the collar 10 and the annular edge surface 14.

[0051] A bolt head 11 of the attachment bolt 3 is locked against a side of the collar 10 that is oriented away from the edge surface 14 wherein a bolt shaft 12 is threaded into the threaded dead hole 13 of the tooth implant 1 in order to fix the abutment 2 at the tooth implant 1 in the center position.

[0052] In the illustrated embodiment an apex end of the abutment 2 extends in a direction of the tooth implant axis 15 to a level at the tooth implant 1 with reference to the tooth implant axis 15 wherein the level is designated in FIG. 2 with the reference numeral 4. On the other hand side the insertion section 1a is threaded into the jaw bone 16 to a level at the tooth implant 1 that is designated in FIG. 2 with reference numeral 5, wherein the level 5 is measured relative to the tooth implant axis 15 that extends in the axial direction. The first cone 7 of the multi-functional section 1b advantageously extends between the level 5 and the level 4 in a direction of the tooth implant axis 15.

[0053] The first cone 7 and the second cone 6 advantageously include the same cone angle and a common smooth enveloping surface. Put differently the first cone 7 transitions into the second cone 6 directly and continuously and without a shoulder and without a change of cone angle. Thus, the second cone 6 forms a direct continuation of the first cone 7.

[0054] Viewed from a coronal side of the tooth implant 1 the first cone 7 forms an extension of the second cone 6 which forms a centering seat for the abutment 2, so that it is possible on the one hand side to replace the originally used abutment 2 with a replacement abutment that has a greater axial length. For example the apex end of the replacement abutment can theoretically extend in the direction of the tooth implant axis 15 to the level 5 in FIG. 2 where the insertion section 1a starts due to the continuous and smooth transition of the second cone 6 into the first cone 7.

[0055] The longer replacement abutment is an effective response to a gingival recession and a possible exposure of the tooth implant. When higher chewing loads are to be expected the axially longer connection surface between the tooth implant 1 and the replacement abutment provides higher mechanical stability. In case of peri-implantitis merely the contaminated surface in the portion of the second cone 6 needs to be removed.

[0056] On the other hand side also the insertion section 1a of the tooth implant 1 can be threaded into the jaw bone deeper, e.g. far enough so that the jaw bone crest of the jaw bone reaches the level 4 in FIG. 2 on which the apex end of the abutment 2 is arranged. Then at least a portion of the first cone 7 is below the jaw line which advantageously improves flexibility with respect to the screw in depth of the tooth implant 1 into the jaw bone. Thus it also has to be assured that the insertion section 1a is covered by bone material.

[0057] Consequently the multi-functional section 1b that includes the first cone 7 or that is formed by the first cone 7 provides several functions in that it facilitates on the one hand side replacing an abutment 2 with a longer replacement abutment and on the other hand side a flexible insertion of the tooth implant 1 into the jaw bone.

[0058] Furthermore the tooth implant 1 is made from a first material which has an elasticity modulus between 15 GPa and 75 GPa. The abutment is made from a second material that has an elasticity modulus of greater than 100 GPa. The attachment bolt 3 can be made from the first material or the second material.

[0059] The term material includes pure materials and also alloys which are made from several alloy components like e.g. titanium alloys.

[0060] Thus, the effective elasticity modulus of the dental implant system in the portion of the attachment screw 3 can be adapted as required. Using the second material for the abutment 2 that has a greater elasticity modulus compared to the first material of the tooth implant 1 yields a higher relative elasticity modulus for the pairing of the tooth implant attachment bolt in the portion of the threaded dead hole 13 of the tooth implant 1 that is penetrated by the attachment screw 3. Selecting the material of the attachment screw 3 within the first material or the second material and a length of the attachment screw 3 facilitates adapting the elasticity modulus in an optimum manner to the requirements.

[0061] In the portion of the jaw bone, this means within the insertion section 1a of the tooth implant 1 the elasticity modulus of the first material is advantageously low. In the portion of the abutment 2 the elasticity modulus is higher in comparison. Under a chewing load the tooth implant 1 imparts greater loads onto the crestal bone. Adapting a length of the attachment bolt 3 as a function of a geometry of the tooth implant 1 helps to reduce a load transfer to the crestal bone.

[0062] In a particularly advantageous manner a beta titanium alloy is provided as a first material for the tooth implant 1 and as a second material for the abutment 2 cP-titanium (commercially pure titanium) is provided.

[0063] Additionally the first material and/or the second material are nano structured. Nano structured material has an inner structure or a surface structure in a nanometer range (e.g. nano composite). A nano structure of this type increases strength and in particular fatigue strength so that an overall size of the tooth implants can be advantageously reduced.

[0064] Nano structured titanium or a nano structured titanium alloy has a significantly increased osteo integration capability compared to non nano structured materials. Tooth implants made from nano structured material, therefore do not require surface coating or surface treatment. This facilitates the advantageous configuration of the tooth implant 1 with the first cone 7 and the second cone 6 described supra.

REFERENCE NUMERALS AND DESIGNATIONS

[0065] 1 tooth implant [0066] 1a insertion section [0067] 1b multi-functional section [0068] 1c attachment section [0069] 2 abutment [0070] 3 attachment bolt [0071] 4 level [0072] 5 level [0073] 6 second cone [0074] 7 first cone [0075] 8 pass through opening [0076] 9 inner cone [0077] 10 collar [0078] 11 bolt head [0079] 12 bolt shaft [0080] 13 threaded bore hole [0081] 14 edge surface [0082] 15 tooth implant axis [0083] 16 jaw bone [0084] X internal connection [0085] Y screw thread or nail thread