Dental restoration device

Abstract

The invention relates to a dental restoration device (1) for producing at least one restoration product which can be customized by an operator according to the clinical needs of a patient, comprising at least one rotating element (20), the bottom of which is connected to an implant element (5) by means of anchoring means (10) and the top of which is connected to a residual tooth (4) by means of connecting means (3), the rotating element (20) consists of an upper part (21) and a lower part (22). The upper portion (21) of the rotating element (20) is arranged relative to the lower portion (22) as a function of a value assumed according to the angle alpha.

Description

Technical Field

[0001] The invention relates to a tooth restoration device, in particular to a tooth implant restoration device. Background Art

[0002] Known implants for locking dental restorations comprise an intraosseous part provided with an external thread for screwing into a bone seat of a tooth and an abutment designed to be fixed to the intraosseous part and for anchoring the dental restoration.

[0003] To achieve the coupling, the abutment comprises a graft appendage which can be inserted into a corresponding graft recess formed in the intraosseous part.

[0004] For stable fixation of the abutment to the intrabone part, an axially hollow abutment is used in order to insert a screw which is screwed into an internally threaded recess in the intrabone part.

[0005] It is also known in the art that, according to this technology, the abutment is fixed to the intraosseous part by a cementation process, but this does not avoid the risk of penetration and may cause some disadvantages, for example, the adhesive may fall off.

[0006] Implants are also known in which the abutment comprises a graft appendage which can engage into a corresponding graft cavity made in the endosseous part, wherein the graft appendage is, for example, threaded so as to be screwed into a corresponding threaded cavity made in the endosseous part.

[0007] Other improved connection methods are known, such as, for example, special configurations of the abutment connection attachments and special configurations of the recesses created in the intraosseous portion.

[0008] For example, it is known that the intraosseous part is provided with an annular cavity at the opening of the recess, which cavity is suitable for the axial insertion of a corresponding annular projection on the abutment appendage.

[0009] It is also known in dental technology that a dental implant can be tilted by up to 30° relative to the final position of the restoration when inserted into the bone arch, thus causing an undercut.

[0010] As is known, development research seeks solutions related to the elimination of undercuts in the restoration of tooth preparation. In order to be able to create precise artefacts and obtain suitable insertion axes (especially in the case of several abutments), it is necessary to reduce the stresses to which the material is subjected when it is removed from the mouth during the impression-taking process, making the undercut immediately visible. Known CAD programs can virtually identify undercuts, that is, the convexity of the tooth with respect to the horizontal plane and the chosen intersection axis, but this virtual design does not guarantee the parallelism with the abutments and the restoration at the same time.

[0011] Obviously, no dental device can guarantee the parallelism and alignment of the abutments in a restoration, thereby eliminating undercuts for each abutment during the realization of the restoration. Summary of the invention

[0012] The object of the present invention is to solve the above-mentioned problems of the prior art by providing a dental restoration device for manufacturing at least one restoration product which can be customized by an operator according to the clinical needs of a patient.

[0013] Another object of the present invention is to provide a device capable of optimizing the positioning of the dental abutments of a dental restoration by ensuring the correct alignment and parallelism of the abutments in the restoration, thereby eliminating any formation of undercuts.

[0014] As will be apparent from the following description, the above and other objects and advantages of the invention are achieved by a dental restoration device such as described in claim 1. Preferred embodiments and important variants of the invention form the object of the dependent claims.

[0015] It should be understood that all the appended claims constitute an integral part of the present description.

[0016] It is obvious that numerous changes and modifications may be made to what has been described (for example concerning shape, size, arrangement and parts with equivalent functions) without departing from the scope of protection of the invention as shown in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The invention will be better described by referring to some preferred embodiments provided by way of non-limiting example with reference to the accompanying drawings, in which:

[0018] Figure 1 A cross-sectional view showing a preferred embodiment of the device according to the present invention;

[0019] Figure 2 shows a cross-sectional view of elements of a device according to the invention;

[0020] Figure 3 shows a cross-sectional view of elements of a device according to the invention;

[0021] Figure 4 shows a side view of elements of a device according to the invention;

[0022] Figure 5 shows a top view of elements of a device according to the invention;

[0023] Figure 6 A bottom view showing elements of a device according to the invention;

[0024] Figure 7shows a side view of elements of a device according to the invention;

[0025] Figure 8 shows a cross-sectional view of elements of a device according to the invention;

[0026] Fig. 9 shows a side view of elements of a device according to the invention;

[0027] Fig.10 A cross-sectional view showing one embodiment of the device according to the present invention;

[0028] Fig.11 A side view showing one mode of the device according to the invention;

[0029] Fig.12 shows a cross-sectional view of elements of a device according to the invention;

[0030] Fig.13 shows a side view of elements of a device according to the invention; and

[0031] Figures 14 to 20 A cross-sectional view of an embodiment of a device according to the invention is shown. DETAILED DESCRIPTION

[0032] With reference to the accompanying drawings, a dental restoration device 1 according to the present invention is designed to manufacture at least one restoration that can be customized by an operator according to the clinical needs of the patient, optimizes the positioning of at least one tooth abutment 4, eliminates any undercuts generated during the restoration process, and ensures the alignment of the abutment 4 in the restoration product, including:

[0033] at least one implant element 5, designed to be implanted in a subgingival bone location by means of an external thread provided on the outer surface of the implant element 5 and connected to at least one anchoring device 10 at the top, and equipped in the upper part with a conical or cylindrical upper centering and closing chamber 5a designed for centering and closing the anchoring device 10;

[0034] - Anchoring device 10, the bottom of which is coupled to the implant element 5 and the top of which is coupled to the rotation element 20; on its outer surface, two or more anchoring lugs 11 are provided, the anchoring lugs 11 are tightly connected to the upper part 13b by chemical or mechanical fixing means, such as a bayonet fixing device or other similar means, or both fixing means, and are connected to the inner surfaces of the first and second cavities 24, 25 of the rotation element 20, allowing the rotation element 20 to rotate relative to the anchoring device 10 by an angle γ, wherein γ is between 0° and 360°, allowing adaptation to the gingival contour while ensuring the alignment of the abutment 4 in the restoration product;

[0035] - a rotating element 20, the bottom of which is connected to the implant element 5 via an anchoring device 10 and the top of which is connected to at least one abutment 4 via a connecting device 3;

[0036] - connection means 3 for connecting the base 4 to the rotating element 20;

[0037] - an abutment 4 connected to the rotation element 20 by means of a connection device 3 and designed for fixing a dental restoration to the abutment 4 by means of chemical fixation, mechanical fixation or both, by inserting a through screw 7;

[0038] a first through screw 6 for fastening the rotation element 20 to the implant element 5 via the anchoring device 10; and

[0039] A second through screw 7 for fastening the base 4 to the rotating element 20 via the coupling device 3 .

[0040] The rotating element 20 comprises:

[0041] the upper part 21 is externally provided with a conical profile to facilitate the coupling of the base 4 with the rotating element 20 and is provided with a first axis of symmetry A; and

[0042] - a lower part 22, provided with a second axis of symmetry B; advantageously, the intersection of the first axis of symmetry A and the second axis of symmetry B forms an angle α, wherein α is between 0° and 60°. Furthermore, the upper part (21) of the rotary element (20) is arranged relative to the lower part (22) as a function of the value taken by the angle α.

[0043] like Figure 15-20 As shown, according to the value obtained by the angle α at which the first symmetry axis A intersects the second symmetry axis B, the lower portion 22 of the rotation element 20 has a shape and physical size customized by the operator according to the clinical needs of the patient according to the value of the angle α. A rotation element 20 can be physically obtained, which has a physical shape and size that can compensate for the inclination of the implant element 5 implanted in the bone site, thereby providing the correct alignment of the abutment 4 in the restoration product and ensuring its parallelism with the adjacent abutment or tooth.

[0044] like Figure 15-17As shown, the upper part 21 of the rotation element 20 is arranged relative to the lower part 22 according to a function of the value of the angle α obtained by the intersection of the first symmetry axis A and the second symmetry axis B, and at the same time, the lower part 22 of the rotation element 20 has a shape and physical size that can be customized by the operator according to the value of the angle α according to the clinical needs of the patient. These upper parts 21 and lower parts 22 form an integrally formed rotation element 20, whose shape and physical size can compensate for the inclination of the implant element 5 implanted in the bone site, thereby providing correct alignment of the abutment 4 in the restoration product, ensuring its parallelism with the adjacent abutment or tooth.

[0045] In addition, when the prosthetic product is installed in the patient's body, once the rotating element 20 is coupled to the implant element 5, the rotating element 20 is designed to rotate at an angle γ relative to the anchoring device 10, and the angle γ is between 0° and 360°, thereby allowing the operator to optimally position the abutment 4 during the installation of the prosthetic product, which helps to correctly align and parallelize the abutment 4 in the prosthetic product.

[0046] In addition, the rotating element 20 is internally equipped with:

[0047] - located in the upper part of the third cavity 23, designed to connect the connecting device 3 to the rotating element;

[0048] - in the central part of the first cavity 24, a groove is provided for accommodating two or more anchoring fins 11 of the anchoring device 10, which facilitates the rotation of the rotating element 20 relative to the anchoring device 10 by an angle γ between 0° and 360°; and

[0049] - The second cavity 25 is provided with a groove inside its lower part, which allows the sliding and positioning of the anchoring device 10, facilitating its rotation along the central axis.

[0050] Advantageously, the anchoring device 10 is internally equipped with:

[0051] - in the upper part of the cylindrical or conical fourth cavity 14, designed to accommodate the first head 61 of the first through screw 6, mechanically fastened by expansion of the groove protrusion, or chemically fastened, or both fastening methods are adopted;

[0052] - A thread 13 is designed in the central part of the channel to facilitate the passage and tightening of the first through-screw 6;

[0053] - in the lower part of the fifth cylindrical cavity 12 , a passage is designed for the threaded rod 62 of the first through-screw 6 ;

[0054] - the lower outer portion 13a has a hexagonal, conical or other shape suitable for coupling with the upper centering and closing chamber 5a of the implant element 5, facilitating its optimal positioning in a unique and repeatable manner; and

[0055] The upper outer portion 13 b has a cylindrical or other suitable shape designed to cooperate with the first and second cavities 24 , 25 of the rotation element 20 , thereby advantageously allowing the rotation element 20 to be centering with the implant element 5 .

[0056] In addition, the connecting device 3 includes a third upper part 31 which is cylindrical, hexagonal, conical or other shapes suitable for coupling with the base 4; a fourth lower part 32, whose outer surface is provided with a thread or a bayonet connection; a fifth center part 33, whose inner surface is provided with a thread 33a, for facilitating the passage and tightening of the second through screw 7. Preferably, the fifth center part 33 is provided with a conical connection with a groove or a bayonet.

[0057] In addition, the interior of the base 4 is composed of the following parts:

[0058] a sixth upper portion 41 of any geometric shape, designed to house the head of the second through-screw 7;

[0059] - the seventh central portion 42 is a threaded axial groove designed for the passage of the threaded rod of the second through-screw 7;

[0060] an eighth lower portion 43 , the contour of which corresponds to the outer contour of the upper portion 21 of the rotary element 20 ; and

[0061] The ninth portion 44 has a hexagonal shape or other geometric shape, designed to tightly engage with the third upper portion 31 of the connecting device 3 , ensuring a unique and repeatable positioning of the base 4 .

[0062] Some preferred embodiments of the invention have been described, but naturally they are susceptible to further modifications and variations within the same inventive concept. In particular, it will be apparent to those skilled in the art that a variety of variations and modifications functionally equivalent to the previous embodiments fall within the scope of protection of the invention as emphasized in the appended claims.

Claims

1. A dental restoration device (1) designed to create at least one restoration product which can be customized by an operator according to the clinical needs of the patient, characterized in that The invention comprises at least one rotating element (20), the bottom of which is connected to the implant element (5) via an anchoring device (10), and the top of which is connected to the residual tooth (4) via a connecting device (3). The rotating element (20) is composed of the following components: - the upper part (21) is externally provided with a conical profile to facilitate the coupling of the residual tooth (4) with the rotating element (20) and is provided with a first axis of symmetry A; - a lower part (22) provided with a second axis of symmetry B, the intersection of the first axis of symmetry A and the second axis of symmetry B forming an angle α, wherein α is between 0° and 60°, so that the lower part (22) of the rotation element (20) has a physical shape and dimensions according to the value of the angle α, capable of compensating for the tilting of the implant element (5) implanted in the bone site, thus ensuring the correct alignment of the residual tooth (4) in the restoration product; The upper part (21) of the rotating element (20) is arranged relative to the lower part (22) as a function of the value of the angle α.

2. The device (1) according to claim 1, characterized in that The rotating element (20) is internally equipped with: - in the upper part of the third cavity (23), designed to connect the connecting device (3) to the rotating element (20); - in the central part of the first cavity (24), designed to prevent translation along the axis and to facilitate the rotation of the rotating element (20) relative to the anchoring device (10) by an angle γ, wherein γ is between 0° and 360°; and - The lower part of the second cavity (25) is provided with a groove which allows the sliding and positioning of the anchoring device (10) and facilitates its rotation along the central axis.

3. The device (1) according to claim 1, characterized in that The rotating element (20) is designed to rotate relative to the anchoring device (10) by an angle γ, wherein the angle γ is between 0° and 360°, thereby ensuring an optimal positioning of the residual tooth (4) connected thereto.

4. The device (1) according to claim 1, characterized in that in, It also comprises a first through screw (6) designed to fasten the rotation element (20) to the implant element (5) via an anchoring device (10), the first through screw (6) being a variable expansion screw.

5. The device (1) according to claim 1, characterized in that It also includes: - an implant element (5) designed to be implanted in a subgingival position by means of an external thread provided on the outer surface of the implant element (5) and connected at the top to an anchoring device (10), which is provided at the upper part of the upper centering and closing chamber (5a) and is designed to center and close the anchoring device (10); - An anchoring device (10), which is coupled to the implant element (5) at the bottom and to the rotating element (20) at the top; and is equipped with two or more anchoring fins (11) on the top of the outer surface, which are tightly connected to the inner surfaces of the first and second cavities (24), (25) of the rotating element (20) by chemical or mechanical fixation or both, allowing the rotating element (20) to rotate at an angle γ relative to the anchoring device (10), where γ is between 0° and 360°. - a connecting device (3) for connecting the residual tooth (4) to the rotating element (20); - a residual tooth (4), connected to the rotation element (20) via a connecting device (3) and designed to fix a dental restoration via a thread or a bayonet connection provided on the outer surface of the residual tooth (4); - A second through screw (7) for fastening the residual tooth (4) to the rotating element (20) via the coupling device (3).

6. Device (1) according to the preceding claim, characterized in that The interior of the anchoring device (10) is equipped with: - In the upper part of the fourth cavity (14), the shape is cylindrical or conical so as to facilitate the accommodation of the first head (61) of the first through-screw (6); - in the central part of the channel, a thread (13) designed to facilitate the passage and tightening of a first through-screw (6); and - located in the lower part of the fifth cylindrical cavity (12), designed for the passage of the shank of the first through-screw (6); - the lower outer portion (13a) is designed to be coupled in the cavity (5a) of the implant element (5), facilitating its optimal positioning in a reproducible manner; and - an upper external portion (13b) designed to couple with the first and second cavities (24), (25) of the rotation element (20), advantageously allowing the rotation element (20) to be centred with the implant element (5).

7. The device (1) according to claim 4, characterized in that The connecting device (3) consists of a third upper part (31); a fourth lower part (32) having a thread or a bayonet coupling on its outer surface; and a fifth central part (33) having a thread (33a) on its inner surface for facilitating the passage and tightening of a second through screw (7).

8. The device (1) according to claim 4, characterized in that The residual tooth (4) includes: - a sixth upper portion (41) for receiving the head of a second through-screw (7); - a seventh central portion (42) designed for the passage of the threaded rod of the second through-screw (7); - the eighth lower portion (43) has a contour shape corresponding to the outer contour shape of the upper portion (21) of the rotating element (20); - The ninth portion (44) is hexagonal or other geometrical shape, designed to tightly couple with the third upper portion (31) of the connecting device (3), ensuring a unique and repeatable positioning of the residual tooth (4).

Images