Ceramic dental implant

Abstract

The utility model relates to a ceramic dental implant. The ceramic dental implant comprises an implant root and an abutment, wherein the implant root is implanted into a gum; the abutment is connected with a dental crown; the implant root comprises a neck part and a hard tissue integration part positioned below the neck part; wherein the outer surface of the hard tissue integration part is provided with an external thread used for being screwed into an alveolar bone; the bottom surface of the neck part is a plane, the top surface of the neck part is an uneven curved surface and comprises two symmetrically arranged concave surfaces, each concave surface is of a structure with a low middle part and two high sides, and the edge of each concave surface is in an arc shape protruding towards the hard tissue integration part; and the base station is arranged above the neck part. The implant can be suitable for a false tooth which is thin and has a narrow contact surface with gingiva, so that the connection stability of the dental implant and the false tooth is improved, and the situation that the dental implant false tooth is not attractive due to the fact that the connecting part of the neck and the abutment protrudes outwards can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of dental implant technology, and in particular to a ceramic dental implant. Background Technology

[0002] Dental implants are surgically inserted into the oral cavity to replace the root of a missing tooth, and a prosthesis is then fabricated on top to restore the tooth's shape and function. The neck of the implant, the coronal portion, is the crucial area connecting the abutment and the prosthesis.

[0003] In existing technologies, the neck of most implants is cylindrical or frustum-shaped, with its outer surface being an annular arc-shaped curved surface. However, this structure is only suitable for implants with a large contact surface with the gums, such as molars, and not for implants with a narrow contact surface with the gums, such as lateral incisors or small canines near the incisors. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a ceramic dental implant.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A ceramic dental implant includes: an implant root that is implanted into the jawbone and an abutment connected to a crown; the implant root includes a neck and a hard tissue integration portion located below the neck;

[0007] The outer surface of the hard tissue integration part is provided with external threads for screwing into the alveolar bone;

[0008] The bottom surface of the neck is a plane, and the top surface of the neck is an uneven curved surface, which includes two symmetrically arranged concave surfaces. Each concave surface has a structure that is low in the middle and high on both sides, and the edge of the concave surface is an arc shape that convexes towards the hard tissue integration part.

[0009] The base is positioned above the neck.

[0010] In one embodiment of this utility model, the base is provided with two symmetrically arranged tapered side surfaces, and the symmetrical planes of the two tapered side surfaces and the symmetrical planes of the two concave surfaces are coplanar with the axis of the implant.

[0011] In one embodiment of this utility model, the top surface of the base is elliptical, and the top surface of the base extends downward and outward to contact the top surface of the neck, forming the tapered side surface.

[0012] In one embodiment of this utility model, two symmetrical cut surfaces are arranged on the base, the two cut surfaces are oblique cut surfaces, and the intersection of the two cut surfaces is above the base; or, the two cut surfaces are L-shaped cut surfaces.

[0013] In one embodiment of this utility model, the hard tissue integration portion, the neck, and the abutment are integrally formed.

[0014] In one embodiment of this utility model, the hard tissue integration portion is cylindrical.

[0015] In one embodiment of this utility model, the hard tissue integration portion includes a conical segment and a cylindrical segment, wherein the thread depth of the conical segment and the cylindrical segment is the same.

[0016] The beneficial effects of adopting the above technical solution are as follows:

[0017] The ceramic dental implant provided by this utility model has a concave surface at the neck with a structure that is low in the middle and high on both sides. The edge of the concave surface is an arc shape that convexes towards the hard tissue integration part. Therefore, after implantation, the arc of the concave surface convexes towards the gum, presenting the arc of the connection between the original natural tooth and the gum at the implantation site. In this way, the arc can play an indicative positioning role, so as to facilitate medical staff to fix the denture on the abutment in the correct direction.

[0018] Moreover, the recessed surface makes it more suitable for dentures with narrow contact surfaces with the gums. This not only increases the stability of the connection between the ceramic dental implant and the denture, but also avoids the situation where the implant denture is unsightly due to the outward protrusion of the neck and abutment connection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the first type of ceramic dental implant provided in this embodiment of the present invention.

[0020] Figure 2 yes Figure 1 The main view.

[0021] Figure 3 yes Figure 1 Side view.

[0022] Figure 4 This is a schematic diagram of the structure of the second type of ceramic dental implant provided in this embodiment of the present invention.

[0023] Figure 5 yes Figure 4 The main view.

[0024] Figure 6 yes Figure 4 Side view.

[0025] Figure 7 This is a schematic diagram of the structure of the third type of ceramic dental implant provided in this embodiment of the present invention.

[0026] Figure 8 yes Figure 7 The main view.

[0027] Figure 9 yes Figure 7 Side view.

[0028] Figure 10 This is a structural schematic diagram of the fourth type of ceramic dental implant provided in this embodiment of the present invention.

[0029] Figure 11 yes Figure 10 The main view.

[0030] Figure 12 This is a schematic diagram of the installation of the ceramic dental implant provided in this embodiment of the utility model.

[0031] Figure 13 This is a front view of the fourth type of ceramic dental implant with a V-shaped groove provided in this utility model embodiment.

[0032] Figure 14 This is a front view of the fourth type of ceramic dental implant with another type of V-groove provided in this embodiment of the utility model.

[0033] Figure 15 This is a diagram of teeth inside the human oral cavity.

[0034] Figure 16 This is a schematic diagram showing the specific arrangement of the upper teeth.

[0035] in:

[0036] 100 central incisors, 200 lateral incisors, 300 canines, 400 premolars, 500 molars;

[0037] 1. Root of implant; 101. Hard tissue integration; 101-1. Cylindrical segment; 101-2. Conical segment; 101-3. External thread; 101-4. V-groove; 102. Neck; 102-1. Top surface of neck; 102-2. Concave surface; 102-3. Edge; 2. Abutment; 201. Tapered side surface; 202. Top surface of abutment; 203. Section.

[0038] 100 Ceramic dental implants, 200 Natural teeth, 300 Gingival flaps, 400 Gingival flaps. Detailed Implementation

[0039] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be clearly and completely described below in conjunction with specific embodiments.

[0040] This utility model embodiment provides a ceramic dental implant, such as Figures 1-11 As shown, it includes: an implant root 1 implanted into the dental alveolar bone and an abutment 2 connected to the crown; the implant root 1 includes a neck 102 and a hard tissue integration portion 101 located below the neck 102; specifically, the hard tissue integration portion 101 is disposed at the bottom edge of the neck 102; the abutment 2 is disposed above the neck 102, and the hard tissue integration portion 101, the neck 102 and the abutment 2 are integrally formed.

[0041] In this invention, "upper" and "lower" refer to the following terms during dental implantation: "lower" refers to the portion of the implant placed inside the alveolar bone in the edentulous area of ​​the patient; while "upper" refers to the portion of the implant that protrudes from the alveolar bone. Therefore, "upper" and "lower" will have different orientations depending on whether the implant is placed in the upper or lower jawbone during the implantation procedure.

[0042] The hard tissue integration part 101 has an external thread 101-3 on its outer surface for screwing into the alveolar bone, with a length h1 of 10-14 mm, for example, 10 mm, 12 mm or 14 mm. The bottom end of the hard tissue integration part 101 is not threaded, which can prevent stress concentration and improve the strength of the implant root. The thread of the hard tissue integration part 101 is arc-shaped. This shape can prevent the implant root 1 from breaking due to stress concentration at the tip, and also allow sufficient space for bone cells to grow, so as to improve the connection strength.

[0043] The bottom surface of the neck 102 is a plane, and the top surface of the neck 102-1 is an uneven curved surface, which includes two symmetrically arranged concave surfaces 102-2. Each concave surface 102-2 has a structure that is low in the middle and high on both sides. The edge 102-3 of the concave surface 102-2 is an arc shape that convexes toward the hard tissue integration part 101.

[0044] During dental implantation, a hole is first drilled at the implant site. Then, a locking device is used in conjunction with the abutment 2 to rotate and engage the external thread 101-3 on the hard tissue integration portion 101 onto the gum line. Because the concave surface 102-2 of the neck 102 has a structure that is low in the middle and high on both sides, and the edge 102-3 of the concave surface 102-2 is an arc shape convex towards the hard tissue integration portion 101, after implantation, the arc of the concave surface 102-2 convexes towards the gum line, presenting an arc similar to the junction of the original natural tooth and gum at the implant site. Figure 12As shown, the arc can serve as a guide for positioning, facilitating the placement of the prosthesis on the abutment 2 by medical staff in the correct orientation. Furthermore, the recessed surface 102-2 makes it more suitable for thin prostheses with narrow contact surfaces with the gum line. This not only increases the stability of the connection between the ceramic implant and the prosthesis but also prevents the implant prosthesis from becoming aesthetically unappealing due to the outward protrusion of the neck 102 at the connection point with the abutment 2. The central convexity of the recessed surface 102-2 is designed to allow for a gap between the crown connected to the ceramic implant and the adjacent teeth, maximizing installation stability and strength.

[0045] Furthermore, in order to facilitate the installation of the denture and to fit the top surface of the aforementioned neck 102, the abutment 2 is provided with two symmetrically arranged tapered side surfaces 201, and the symmetrical planes of the two tapered side surfaces 201 and the symmetrical planes of the two concave surfaces 102-2 are coplanar with the axis of the implant, thereby ensuring that after the hard tissue integration part 101 is fixed, the tapered side surfaces 201 fit exactly with the denture, so as to facilitate the installation of the denture.

[0046] Of course, all the connections of the ceramic dental implant provided by this utility model are circular arc connections, and its first derivative is also continuous, which prevents stress concentration and thus prevents the ceramic dental implant from cracking.

[0047] like Figures 14-15 As shown, the dental implant provided in this embodiment of the present invention can be applied to situations where the original natural teeth are of various types.

[0048] Below is a description of human teeth. Adults typically have 32 permanent teeth, divided into upper and lower rows. The upper and lower rows have the same composition, consisting of: two central incisors (100), two lateral incisors (200), two canines (300), four premolars / premolars (400), and six molars (500). The specific structure is as follows... Figure 15 and Figure 16 As shown.

[0049] Depend on Figure 14 As shown, the root length, size and spatial structure of each tooth are not consistent. Therefore, in order to adapt to the root of the original natural tooth, this utility model designs different implant structures and shapes, so that it is not only suitable for dentures with a narrow contact surface with the gum, but also for dentures with a large contact surface with the gum. The following will explain three cases.

[0050] In the first case, when implanting a denture with a narrow contact surface with the gum, such as a lateral incisor or a small canine near the incisor, the top surface 202 of the abutment is elliptical and extends downward and outward to contact the top surface 102-1 of the neck 102, forming the tapered side surface 201.

[0051] The following will provide further explanation in conjunction with the dimensions.

[0052] In one possible implementation, to adapt to the lateral incisors, such as... Figures 1-3 As shown, the hard tissue integration part 101 is cylindrical, and the sealing surface diameter D1 of the external thread 101-3 is 4.1mm; the top surface of the neck platform is also provided with a raised surface, and the two recessed surfaces 102-2 are provided on both sides of the raised surface. The edge 102-3 of the top surface of the neck platform is flush with the edge 102-3 of the bottom surface of the neck platform; the total length h2 of the base 2 and the neck 102 is 7.8mm.

[0053] In another possible implementation, in order to fit the small canine teeth near the incisors, such as Figures 4-6 As shown, the hard tissue integration section 101 includes a conical section 101-2 and a cylindrical section 101-1. The sealing surface diameter D1 of the cylindrical threaded portion is 4.1 mm, and the major diameter D2 of the sealing surface of the conical section 101-2 threaded portion is 4.8 mm. The edge 102-3 of the top surface of the neck is located outside the edge 102-3 of the bottom surface of the neck, and the projection of the edge 102-3 of the top surface of the neck forms a circle with a diameter D3 of 6 mm. The length h of the neck 102 is... 21 The length h of base 2 is 4mm. 22 The length is 5mm; in this invention, the maximum length between the upper and lower surfaces of the neck 102 is taken as the length h of the neck 102. 21 The minimum distance between the neck 102 and the base 2 is taken as the length h of the base 2. 22 .

[0054] In the second scenario, when implanting a prosthesis with a wide contact surface with the gums, such as a molar, two symmetrical cut surfaces 203 are provided on the abutment 2. The two cut surfaces 203 are L-shaped cut surfaces. The vertical surface is used to enhance the torque of the locking device, and the horizontal surface is used to limit the locking device.

[0055] For molar adaptation, such as Figures 7-9 As shown, the hard tissue integration section 101 includes a conical section 101-2 and a cylindrical section 101-1. The sealing surface diameter D1 of the cylindrical threaded portion is 4.8 mm, and the major diameter D2 of the sealing surface of the conical section 101-2 threaded portion is 6.5 mm. The edge 102-3 of the top surface of the neck is located outside the edge 102-3 of the bottom surface of the neck, and the projection of the edge 102-3 of the top surface of the neck forms a circle with a diameter D3 of 8 mm. The length h of the neck 102 21 The thickness is 3.5mm, and the length h of the base 2 is... 22 The height of the vertical surface is 3mm. This utility model does not specifically limit the height of the vertical surface. For example, the height of the vertical surface is in the range of 2~2.5mm.

[0056] The third scenario: When implanting a denture with a narrow contact surface with the gum and requiring high connection strength, such as a large central incisor, two symmetrical cut surfaces 203 are provided on the abutment 2, and the two cut surfaces 203 are oblique cut surfaces.

[0057] To fit the large central incisors, such as Figure 10 and Figure 11 As shown, the hard tissue integration section 101 includes a conical section 101-2 and a cylindrical section 101-1. The sealing surface diameter D1 of the cylindrical threaded portion is 4.8 mm, and the major diameter D2 of the sealing surface of the conical section 101-2 threaded portion is 6 mm. The edge 102-3 of the top surface of the neck is located outside the edge 102-3 of the bottom surface of the neck, and the projection of the edge 102-3 of the top surface of the neck forms a circle with a diameter D3 of 6.5 mm. The length h of the neck 102 is... 21 The length h of base 2 is 4mm. 22 The length h of the top surface of base 2 is 5mm. 221 It is 4mm.

[0058] This invention, by setting different abutment structures 2 and adjusting the dimensions of each component, makes it applicable to different types of dentures, thus increasing its applicability. Furthermore, the material of this invention is ceramic, specifically modified zirconia (see Chinese Invention Patent Publication No. CN 110540426A). The modified zirconia has a density of 99.3%~99.7%, an average grain size of 112~170 nanometers, and a chemical composition as shown in the following formula:

[0059] (100-abcde)mol%ZrO2+amol%Y2O3+bmol%CaO+cmol%Al2O3+dmol%SiO2+emol%TiO2; where a,b,c,d,e are molar percentages, 3.00≤a≤5.00, 0.002≤b≤0.04, 0.20≤c≤0.42, 0.02≤d≤0.12, 0.002≤e≤0.035.

[0060] During manufacturing, the patient's implantation site can be digitally scanned first, and then a personalized 3D printing process can be used to obtain a suitable artificial implant. For example, an extraoral scanner can be used to scan the implant, then the design can be done in software, and finally a ceramic 3D printing system can be used to obtain the artificial implant embryo, which is then sintered.

[0061] Furthermore, considering the situation where some special groups have insufficient gum hardness, this embodiment of the invention also provides another type of ceramic dental implant, such as... Figure 13 and Figure 14As shown, based on the fourth type of ceramic dental implant, a V-shaped groove 101-4 is provided at the lower part of the threaded portion 101. By providing this wedge-shaped groove, it is not only convenient to implant the entire artificial implant, but also to ensure the strength after implantation. Of course, the first, second and third types of ceramic dental implants can also be provided with the wedge-shaped groove 101-4. This utility model embodiment does not specifically limit this.

[0062] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ceramic dental implant, characterized in that, It includes: An implant root (1) is implanted into the dental alveolar bone and an abutment (2) connected to the crown; the implant root (1) includes a neck (102) and a hard tissue integration portion (101) located below the neck (102). The outer surface of the hard tissue integration part (101) is provided with external threads (101-3) for screwing into the alveolar bone. The bottom surface of the neck (102) is a plane, and the top surface of the neck (102-1) is a smooth curved surface, which includes two symmetrically arranged concave surfaces (102-2). Each concave surface (102-2) has a structure that is low in the middle and high on both sides. The edge (102-3) of the concave surface (102-2) is an arc shape that convexes toward the hard tissue integration part (101). The base (2) is positioned above the neck (102).

2. The ceramic dental implant according to claim 1, characterized in that, The abutment (2) is provided with two symmetrically arranged tapered side surfaces (201), and the symmetrical planes of the two tapered side surfaces (201) and the symmetrical planes of the two concave surfaces (102-2) are coplanar with the axis of the implant.

3. A ceramic dental implant according to claim 2, characterized in that, The top surface (202) of the base is elliptical, and the top surface (202) of the base extends downward and outward to contact the top surface (102-1) of the neck, forming the tapered side surface (201).

4. A ceramic dental implant according to claim 3, characterized in that, Two symmetrical cut surfaces (203) are arranged on the base (2); Both of the cut surfaces (203) are oblique cut surfaces, and the two oblique cut surfaces intersect above the base (2); or, both cut surfaces (203) are L-shaped cut surfaces.

5. A ceramic dental implant according to claim 1, characterized in that, The hard tissue integration section (101), the neck (102) and the abutment (2) are integrally formed.

6. A ceramic dental implant according to claim 1, characterized in that, The hard tissue integration section (101) is cylindrical.

7. A ceramic dental implant according to claim 1, characterized in that, The hard tissue integration section (101) includes a conical section (101-2) and a cylindrical section (101-1), and the thread depths of the conical section (101-2) and the cylindrical section (101-1) are the same.

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