SECONDARY PART FOR A DENTAL IMPLANT AND DENTAL IMPLANT SET

Abstract

The invention relates to a secondary part (1) for a dental implant (2). The secondary part (1) has a head part (3) and a connection part (4). The connection part (4) has at least two spring elements (5), which extend along a longitudinal axis (L) of the secondary part (1). The spring elements (5) have a coronal end (6) and an apical end (7) and are connected at the coronal end (6) to the head part (3) In addition, the at least two spring elements (5) are radially supported with respect to each other at the respective apical ends (7) by an end part (8). A central part (9) of at least one of the supported spring elements (5) is in this case elastically deflectable in a radial direction.

Claims

1. Secondary part for a dental implant, comprising a head part and a connecting part, the connecting part having at least two spring elements which extend along a longitudinal axis of the secondary part and each having a coronal and an apical end and being connected to the head part at the coronal end, characterized in that at least two spring elements are radially supported with respect to each other at the respective apical ends by an end part, wherein the spring elements have a central part and the central part of at least one of the supported spring elements is elastically deflectable in a radial direction.

2. Secondary part according to claim 1, characterized in that holes are provided in the central part in the circumferential direction between the spring elements.

3. Secondary part according to claim 1, characterized in that the connecting part comprises at least three spring elements.

4. Secondary part according claim 1, characterized in that at least three spring elements are radially supported by the end part.

5. Secondary part according to claim 1, characterized in that one spring elements has at least one of at least one protrusion and at least one recess in the radial direction with respect to the longitudinal axis.

6. Secondary part according to claim 5, characterized in that the at least one of at least one protrusion and the at least one recess has a continuous profile in the longitudinal direction.

7. Secondary part according to claim 1, characterized in that at least one spring elements are outwardly curved in the radial direction.

8. Secondary part according to claim 1, characterized in that the end part lies in a plane orthogonal to the longitudinal axis.

9. Secondary part according to claim 1, characterized in that the end part is additionally connected to the head part via a stiffening element.

10. Secondary part according to claim 1, characterized in that the connecting part consists of a single material.

11. Secondary part according to claim 1, characterized in that the connecting part additionally contains an anti-torsion guard which is not rotationally symmetrical about the longitudinal axis.

12. Secondary part according to claim 11, characterized in that the anti-torsion guard is formed by an outer contour.

13. Secondary part according to claim 1, characterized in that the head part is configured such that the secondary part forms one of an insertion post, healing cap, gingiva former, scan body, impression post, abutment, selection abutment, positioning aid and an unscrewing instrument.

14. Set comprising a dental implant and a secondary part according to claim 1.

15. Set according to claim 14, characterized in that the dental implant has a cavity with at least one of at least one recess and at least one protrusion.

16. Set according to claim 14, characterized in that the cavity of the dental implant has a longitudinal direction and is at least partially conical in the longitudinal direction.

17. Secondary part according to claim 1, characterized in that the secondary part consists of a single material.

18. Secondary part according to claim 11, characterized in that the anti-torsion guard comprises at least one of a cam, a recess, and a multi-edged outer contour.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0073] With reference to figures, which only represent exemplary embodiments, the invention is explained in detail in the following. Schematically shown are in:

[0074] FIG. 1: A perspective depiction of an embodiment of a gingiva former according to the invention,

[0075] FIG. 2: a perspective depiction of the first embodiment of an unscrewing instrument according to the invention,

[0076] FIG. 3: a perspective depiction of a second embodiment of an unscrewing instrument according to the invention,

[0077] FIG. 4: a schematic depiction of a first embodiment of a insertion post according to the invention,

[0078] FIG. 5: a perspective view of a second embodiment of a insertion post according to the invention,

[0079] FIG. 6: a perspective depiction of a third embodiment of a insertion post according to the invention,

[0080] FIG. 7A to 7G: different embodiments of a head part of secondary parts,

[0081] FIG. 8:

[0082] a half-section view of a secondary part inserted into a dental implant,

[0083] FIG. 9: a side view of a connecting part and

[0084] FIG. 10: a cross-section of the connecting part from FIG. 9.

DETAILED DESCRIPTION OF THE INVENTION

[0085] The perspective illustration in FIG. 1 shows a secondary part 19 with a head part 3 and a connecting part 4. The secondary part is designed as a gingiva former. The head part 3 is arranged in a coronal direction K and the connecting part 4 is arranged in an apical direction A. The coronal direction K points in the direction of a tooth crown. The apical direction A points in the direction of an implant tip.

[0086] At a coronal end 25 of the head part, a recess 26 is provided in which an engagement contour is arranged. A tool for inserting the gingiva former 19 into a dental implant 2 (see FIG. 8) can be inserted into recess 26. Furthermore, the head part 3 has a cylindrical section 27 with which a gingiva can be formed.

[0087] Apically from head part 3 the connecting part 4 is provided. Coronal ends 6 of four spring elements 5 follow directly on the head part. The spring elements 5 are designed as elongated struts and extend in the direction of a longitudinal axis L of the gingiva former. An end part 8 is connected to the spring elements at the opposite apical ends 7 of the spring elements 5. Four slotted holes 10 are provided between the four spring elements 5. The four spring elements are shaped in the same way and are fitted at even intervals along a circumference of the gingiva former.

[0088] The end part 8 is a circular plate and arranged in the center between the spring elements 5. Furthermore, the end part is arranged concentrically to the cylindrical section 27.

[0089] In a central part 9 the spring elements 5 have protrusions 11. The protrusions 11 extend, from the view of the longitudinal axis L, in a radial direction R outwardly. The protrusions 11 have a continuous profile 21 with a continuous transition, i.e. a transition without a jump to the remaining radial outer contour of the spring elements 5.

[0090] FIG. 2 shows a perspective view of a first embodiment of the invention of a secondary part 23, which is designed as a unscrewing instrument. Dental implants that have already been inserted into the bone can be unscrewed using the unscrewing instrument 23. A connecting part 4 contains an anti-torsion guard 14, as well as spring elements 5 extending from it and an end part 8. The anti-torsion guard 14 is fitted between spring elements 5 and head part 3. Due to the anti-torsion guard 14, torques can be transferred from the unscrewing instrument 23 to the dental implant 2. The anti-torsion guard 14 has three cams 15 for this purpose. The three cams 15 are evenly distributed along the circumference of the unscrewing instrument. In addition to the cams 15, the unscrewing instrument has a three-edged outside with three surfaces 17. The cams 15 are brought into engagement with a corresponding counter contour of the dental implant 2.

[0091] The three surfaces 17 are flat and thus form an undercut with respect to a round recess in an implant (see FIG. 8). This makes it easier to guide the unscrewing instrument 23 and protects the inner surfaces of the implant.

[0092] The unscrewing instrument 23 is secured in longitudinal direction L by three spring elements 5 in the implant. The three spring elements 5 support each other at their apical end 7 through the end part 8. As a result, the spring elements are only deformed at a central part 9. A protrusion 11 then engages in a corresponding recess in the dental implant 2. Angled surfaces 28 are provided in a coronal direction K and in an apical direction A of the protrusion 11. Due to the angled surfaces, the protrusion 11 is initially deformed radially inwardly during insertion and snaps into a recess due to the elastic spring forces as soon as the corresponding recess is reached. As soon as a procedure with the unscrewing instrument is completed, the unscrewing instrument can be removed again. During removal, the central part 9 is pressed radially inwardly by the angled surfaces 28 of the protrusion 11.

[0093] In a radial center between the spring elements 5 a stiffening element 13 is provided. The stiffening element 13 extends from the anti-torsion guard 14 to the end part 8 and has a three-edged cross-section. The end part is plate-shaped.

[0094] FIG. 3 shows a perspective view of a second embodiment of a secondary part 23 according to the invention, which is designed as a unscrewing instrument. Like the secondary part 23 in FIG. 2, the unscrewing instrument 23 has an anti-torsion guard 14, spring elements 5 with protrusions 11 and an end part 8 at the apical end 7 of the spring elements 5. Contrary to the unscrewing instrument 23 from FIG. 2, the unscrewing instrument 23 from FIG. 3 has four spring elements 5. The protrusions of the spring elements 5 again contain the inclined surfaces 28 in longitudinal direction L. In addition, the protrusions 11 of the unscrewing instrument 23 have laterally inclined surfaces 29.

[0095] Due to the inclined surfaces 29, an outer surface of the protrusions 11 is smaller and the secondary part 23 can be moved between engagement positions with less force.

[0096] Furthermore, the unscrewing instrument 23 also has a stiffening element 13. The stiffening element 13 extends from the anti-torsion guard 14 to the end part 8 and runs parallel to the spring elements 5. The stiffening element 13 is designed as a cylinder with a square cross-section. A longitudinal axis of the stiffening element is identical to the longitudinal axis L.

[0097] FIG. 4 shows a perspective view of a first embodiment of a secondary part 18 according to the invention, which is designed as an insertion post. The secondary part 18 has a head part 3 and a connecting part 4. The connecting part 4 secures the dental implant 2 along a longitudinal axis L and in the circumferential direction U to the longitudinal axis L. The dental implant 2 can be held by a user at the head part 3 without touching the dental implant 2. In addition, the dental implant 2 can be transported and stored by the head part 3 without touching sensitive surfaces of the dental implant 2 and thus damaging them. The head section 3 is arranged on an apical side and has elongated grooves 30.

[0098] The connecting part 4 has an anti-torsion guard 14, spring elements 5 and an end part 8. The anti-torsion guard 14 comprises elongated cams 15. Between the cams 15 there are elongated indents 16. Elastic spring elements 5 extend from one apical end of the anti-torsion guard 14. The elastic spring elements 5 contain protrusions 11. The end part 8 in the embodiment of FIG. 4 is three-edged. The end part can also be four, five, six or multi-edged. FIG. 4 also shows that the spring elements 5 have a thicker portion 33 at their coronal ends 6.

[0099] The cams 15 as well as the protrusions 11 are engaged with the corresponding counter contours of the dental implant 2. To make it easy for the user to see the orientation of the insertion post 18, the elongated grooves 30, the cams 15 and the protrusions 11 are located in the same position in the circumferential direction U.

[0100] Another embodiment of a secondary part 18 according to the invention, which is designed as an insertion post, is shown in FIG. 5. In contrast to the insertion post from FIG. 4, the anti-torsion guard 14 is only formed by cams 15. A circular cylindrical body extends between the cams 15.

[0101] Furthermore, the head part 3 has an additional support section 31. The support section 31 has a six-edged contour 32. By means of the six-edged contour 31 the insertion post 18 can be held by packaging (not shown).

[0102] The coronal end 6 of each of the spring elements 5 has a thicker portion 33. The thicker portion 33 extends around a circumference of the spring elements. The thicker portion 33 extends in a radially inner direction of the secondary part 18.

[0103] FIG. 6 shows a perspective depiction of a third embodiment of a secondary part 18 according to the invention, which is in the form of an insertion post. The insertion post of FIG. 6 combines the anti-torsion guard 14 and the support section 31 of the insertion post of FIG. 5 with the three spring elements 5 of FIG. 4.

[0104] FIGS. 7A to 7G show different head parts 3 of secondary parts 1. In FIG. 7A the head part is formed as an insertion post. In FIG. 7B, the head part is configured as a gingiva former. FIGS. 7C to 7G show head parts which are formed as different abutments, namely as a modifiable standard abutment (FIG. 7C), prefabricated standard abutment (FIG. 7D), bridge structure (FIG. 7E), ball structure (FIG. 7F) and as an angled abutment (FIG. 7G). Of course the circular part between spring elements 5 and head part 3 can also be constructed as anti-torsion guard 14, as shown in FIGS. 2 to 6. The spring elements 5 and the end part 8 can also be designed like the spring elements 5 of FIGS. 2 to 6.

[0105] FIG. 8 shows a connecting part 4 of an secondary part 1 inserted into a dental implant 2. FIG. 8 shows a half-section in which an upper half of the figure shows a sectional view of the dental implant. Dental implant 2 has a coronal end 205 and an apical end 206. An outer contour 207 is formed as thread 201. Thread 201 engages a patient's jawbone. Inside the dental implant 2, an elongated recess 208 extends from the coronal end 205. An anti-torsion guard is arranged in the recess 208 adjacent to the coronal end 205. The anti-torsion guard forms a counter contour 204 to the anti-torsion guard 14 in FIG. 5.

[0106] The anti-torsion guard therefore has a profile that is not rotationally symmetrical. The non-rotationally-symmetrical profile in FIG. 8 is circular with corresponding grooves so that the counter contour 204 can be inserted with the circular cylinder and the cams from FIG. 5 in a form-fit manner. A first internal thread 203 is provided apically of the anti-torsion guard. When secondary part 1 is inserted into dental implant 2, secondary part 1 is inserted in the longitudinal direction L into recess 208. A cross-section of the end part 8 is smaller than an internal cross-section of the thread 203 and the counter contour 204.

[0107] By contrast, the protrusions 11 project radially outwards from the spring elements 5. If the secondary part 1 is inserted, the protrusion 11 is pressed inwards by the thread 203. The spring elements 5 counteract this force, resulting in a frictional connection. If the secondary part is pushed further in the longitudinal direction, the protrusions snap into one groove of thread 203 and secure the secondary part in the longitudinal direction L. The protrusion 11 can secure the secondary part 1 in any groove of the thread. As soon as a user has reached the desired position, he can leave the secondary in this position without further securing measures.

[0108] An end position is defined by the end part 8, which hits a narrowing cross-section at the end of the thread 203. In addition to the first thread 203, a second thread 202 is provided. The second thread 202 can be used to additionally or alternatively secure a secondary part with a screw, in particular a chimney screw.

[0109] In an alternative embodiment to FIG. 8, the connecting part 4 of secondary part 1 can also be inserted into the second thread 202 and secure the secondary part in the longitudinal direction L at pitches of the second thread. An end position of the secondary part is then determined by an apical end of the recess 208.

[0110] FIG. 9 shows a side view of a connecting part 4. FIG. 9 shows the connecting part 4 of the insertion post 18 shown in FIG. 6. The connecting part 4 shown in FIG. 9 could also be combined with all head parts 3 of FIGS. 7A to 7G.

[0111] The spring elements 5 shown in FIG. 9 have a radial width 34.

[0112] The connecting part 4 has an outer diameter 35. FIG. 9 shows that the radial width is relatively small in relation to the outer radius 35. In the example, the ratio is approximately 4. This means that a ratio between the outer diameter and the radial width is approximately 8.

[0113] FIG. 10 shows a cross-section through the axis A-A (see FIG. 9). FIGS. 9 and 10 depict the length ratios of an embodiment of a connecting part 4 to scale. FIG. 10 shows that a cross-sectional area of the spring elements 5 is small in relation to a cross-sectional area of the head part (indicated by the outer line 36). The ratio shown is approximately 27 to 1. Because the spring elements 5 are relatively thin, they attain their elastic property and can deform elastically radially inwardly when inserted into an implant 201 as shown in FIG. 8.