Artificial ceramic implant for premolar

Abstract

The utility model relates to the technical field of tooth implantation, in particular to an artificial ceramic implant for a premolar, which comprises an implant root implanted into a gum and an abutment connected with a dental crown, the implant root part comprises a smooth column head part, a threaded part and an implant neck part which are sequentially adjacent to one another from bottom to top; wherein the bottom end of the smooth column head is hemispherical; the upper surface of the neck part of the implant neck part is quadrilateral, the lower surface of the neck part is circular, and the side wall of the neck part is arc-shaped; and the base station is arranged on the upper surface of the neck part. The structure is implanted in a knock-in mode, the implanting operation time is short, the operation difficulty is low, postoperative recovery is fast, and the problems of intraoperative bleeding and postoperative swelling can be solved.

Description

Technical Field

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

[0002] Currently, dental implants are mostly installed in the oral cavity using a metal threaded connection method. This involves a complex drilling procedure in the patient's alveolar bone, followed by fixing the dental implant to the alveolar bone with screws.

[0003] However, implants with the above structure require gingival incision surgery during placement, which is a difficult procedure with a long recovery time. Moreover, the surgery can damage the alveolar bone and mucoperiosteal flap, and is prone to problems such as intraoperative bleeding and postoperative swelling, requiring a long time to heal. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an artificial ceramic implant for premolars.

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

[0006] An artificial ceramic implant for premolars includes: a ceramic implant root implanted into the jawbone and an abutment connected to the crown; the implant root includes a smooth post head, a threaded portion and an implant neck, which are sequentially adjacent from bottom to top.

[0007] The bottom of the smooth column head is hemispherical; the upper surface of the implant neck is quadrilateral, the lower surface is circular, and the sidewalls are arc-shaped; the abutment is disposed on the upper surface of the neck.

[0008] In one embodiment of this utility model, the shapes of the two opposite sidewalls on the implant neck correspond, with the curvature of one sidewall being greater than that of the other sidewall.

[0009] In one embodiment of this utility model, the upper surface of the neck is an upwardly raised arc surface, and the lower surface of the neck is a plane.

[0010] 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 upper surface of the neck.

[0011] In one embodiment of this utility model, the top surface of the base is a plane.

[0012] In one embodiment of this utility model, the length ratio of the threaded portion to the smooth column head is 1:(1~1.05).

[0013] In one embodiment of this utility model, the ratio between the maximum distance between the upper and lower surfaces of the implant neck and the minimum distance between the upper surface of the implant neck and the upper surface of the abutment is 1:(1~1.05).

[0014] In one embodiment of this utility model, the threaded portion is tapered.

[0015] The beneficial effects of adopting the above technical solution are as follows:

[0016] The artificial ceramic implant provided by this utility model has a hemispherical bottom end with a smooth post head, which facilitates the implant being hammered into the alveolar socket. The threaded part improves the connection strength with the gum, which can not only prevent the artificial implant from loosening and falling out, but also ensure that it can withstand the biting force during chewing after the crown is installed. The thread of the threaded part is arc-shaped, which is mainly to allow enough space for bone cells to grow, and at the same time prevent stress concentration at the tip from causing root fracture.

[0017] Furthermore, the upper surface of the implant neck is quadrilateral, the lower surface is circular, and the sidewalls are arc-shaped; this structure improves stability after installation. This invention employs a knock-in method for implantation, which shortens the procedure time, reduces surgical difficulty, and promotes rapid postoperative recovery, thus minimizing intraoperative bleeding and postoperative swelling. Attached Figure Description

[0018] Figure 1 This is a diagram of teeth inside the human oral cavity.

[0019] Figure 2 This is a schematic diagram showing the specific arrangement of the upper teeth.

[0020] Figure 3 This is a schematic diagram of the root of a premolar.

[0021] Figure 4 This is a schematic diagram of the structure of an artificial ceramic implant for premolars provided in an embodiment of the present invention.

[0022] Figure 5 yes Figure 4 The main view.

[0023] Figure 6 yes Figure 4 Top view.

[0024] Figure 7 yes Figure 4 Side view.

[0025] in:

[0026] 100 central incisors, 200 lateral incisors, 300 canines, 400 premolars, 500 molars;

[0027] 1. Implant root, 101. Smooth column head, 101-1. Bottom, 102. Threaded part, 103. Implant neck, 103-1. Upper surface of neck, 103-2. Lower surface of neck, 2. Abutment, 201. Top surface of abutment. Detailed Implementation

[0028] 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.

[0029] This utility model embodiment provides an artificial ceramic implant for premolars. First, let's describe 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 1 and Figure 2 As shown.

[0030] Depend on Figure 1 As can be seen, the root length and space of each tooth are not uniform. The premolar is located between the canine and the premolar, and its buccal side has a convex surface. The root structure is as follows: Figure 3 As shown, by Figure 3 It is known that the roots of premolars are small, but they need to have a certain structural strength to withstand a certain amount of force during chewing. In addition, since the premolars are located at the corner of the canines and premolars, the space available for manipulation at the root is small in the early stages of root implantation, so the screw-in method cannot be used.

[0031] In view of this, the artificial ceramic implant structure for premolars provided in this embodiment of the present invention is as follows: Figures 4-7 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 smooth post head 101, a threaded portion 102 and an implant neck 103 that are sequentially adjacent from bottom to top;

[0032] The bottom end 101-1 of the smooth column head is hemispherical; the upper surface 103-1 of the implant neck 103 is quadrilateral, the lower surface 103-2 of the neck is circular, and the sidewalls are arc-shaped; the abutment 2 is disposed on the upper surface of the implant neck 103.

[0033] The artificial ceramic implant provided in this embodiment is suitable for scenarios requiring implantation of posterior teeth, especially premolars. In use, the artificial ceramic implant is driven into the alveolar socket using an impactor and a mallet, and then the crown is placed on the outside of the abutment 2. This artificial ceramic implant features a hemispherical bottom end 101-1 of the smooth post head 101, facilitating easy insertion into the alveolar socket; the threaded portion 102 enhances connection strength, preventing implant dislodgement and ensuring it can withstand occlusal forces during chewing after crown placement; the upper surface 103-1 of the implant neck 103 is quadrilateral, the lower surface 103-2 is circular, and the sidewalls are arc-shaped, improving post-installation stability.

[0034] It should be noted that the threads of the threaded part are arc-shaped, which is mainly to allow enough space for bone cells to grow, and at the same time to prevent stress concentration at the tip from causing the tooth root to break.

[0035] In addition, this invention uses a knock-in method for implantation surgery, which is shorter, less difficult, and allows for faster postoperative recovery, reducing problems such as intraoperative bleeding and postoperative swelling.

[0036] Furthermore, such as Figure 5 As shown, the shapes of the two opposing sidewalls on the implant neck 103 correspond to each other. The curvature of one sidewall is greater than that of the other sidewall. The two sidewalls with smaller curvature are designed to correspond to the front of the crown installed on the implant, while the two sidewalls with larger curvature correspond to the teeth on the left and right sides of the adjacent implant, so that they can be similar to the root of the tooth to be implanted, while ensuring the connection strength.

[0037] The upper surface 103-1 of the implant neck 103 is an upwardly convex arc surface. The connection line between the arc surface and the implant neck is mathematically continuous, and its first derivative is also continuous. This is to ensure a smooth transition and prevent stress concentration. The lower surface 103-2 of the neck is a plane. By making the lower surface 103-2 of the neck a plane, and by placing the threaded portion 102 on the plane, the connection strength can be improved. By making the upper surface 103-1 of the neck an upwardly convex arc surface, which corresponds to the interdental space, it can be ensured that after the implant is inserted into the alveolar socket, it presents the curvature of the connection between the original natural tooth and the gingiva at the implant site, so as to facilitate the installation of the crown.

[0038] In addition, to ensure that the abutment is compatible with the aforementioned implant neck 103 and the crown to be installed, such as Figure 4 and Figure 6 As shown, the top surface 201 of the base 2 is a plane and is elliptical. The top surface 201 of the base extends downward and outward to contact the upper surface 103-1 of the neck, which can prevent rotation and left and right swaying.

[0039] The artificial ceramic implant for premolars provided in this embodiment of the invention does not specifically limit the dimensions of each component. In one possible implementation, to adapt to the premolar, the total length h1 of the smooth post head 101 and the threaded portion 102 can be 8~14mm, preferably 8mm, 10mm, 12mm, or 14mm; the length ratio of the threaded portion 102 to the smooth post head 101 is 1:(1~1.05), preferably 1:1, that is, when h1 is 8cm, the length h of the threaded portion is... 11 and the length h of the smooth column head 12 The diameters are 4cm each, a ratio that ensures good connection performance after hammering, preventing misalignment when the threaded portion 102 is further inserted. Additionally, in one possible implementation, the threaded portion 102 is tapered, and the diameter D of the smooth cylindrical head 101... 11 The diameter of the sealing surface D of the tapered thread portion is 3~4mm, preferably 3.5mm. 12 The thickness is 4.5~5mm, preferably 4.8mm.

[0040] In one possible implementation, the total length h2 of the implant neck 103 and the abutment 2 is 6-8 mm, preferably 7 mm, and the maximum distance h between the upper and lower surfaces of the implant neck 103 is... 21 The minimum distance h between the upper surface of the implant neck 103 and the upper surface of the abutment 2 22 The ratio between them is 1:(1~1.05), preferably 1:1, that is, when h2 is 7mm, h 21 and h 22 All are 3.5mm.

[0041] Of course, the length h of the long axis end (buccal-palatal direction) of the upper surface of the implant neck 103 31 The length is 6.5~7.5mm, preferably 7mm; the length h of the short shaft end (middle to far end) 32 The thickness is 4.5~5.5mm, preferably 5mm.

[0042] When a patient requires implantation, a personalized digital scan of the implantation site can be performed first, followed by 3D printing to obtain a suitable artificial ceramic implant. For example, an extraoral scanner can be used to scan the site, followed by design in software, and finally, a ceramic 3D printing system can be used to obtain the artificial ceramic implant. The material is ceramic, specifically modified zirconia (see Chinese invention patent publication number 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:

[0043] (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.

[0044] 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. An artificial ceramic implant for premolars, characterized in that, It includes: An implant root (1) is implanted into the dental bed and an abutment (2) is connected to the crown; the implant root (1) includes a smooth post head (101), a threaded portion (102) and an implant neck (103) that are sequentially adjacent from bottom to top. The bottom end (101-1) of the smooth column head (101) is hemispherical; the upper surface (103-1) of the implant neck (103) is quadrilateral, the lower surface (103-2) is circular, and the sidewall is arc-shaped; the abutment (2) is disposed on the upper surface (103-1) of the neck.

2. The artificial ceramic implant for premolars according to claim 1, characterized in that, The two opposing sidewalls on the implant neck (103) correspond in shape, with the curvature of one sidewall being greater than that of the other sidewall.

3. The artificial ceramic implant for premolars according to claim 1, characterized in that, The upper surface of the neck (103-1) is an upwardly raised arc surface, and the lower surface of the neck (103-2) is a plane.

4. The artificial ceramic implant for premolars according to claim 3, characterized in that, The top surface (201) of the base (2) is elliptical, and the top surface (201) of the base extends downward and outward to contact the upper surface (103-1) of the neck.

5. The artificial ceramic implant for premolars according to claim 4, characterized in that, The top surface (201) of the base is a plane.

6. The artificial ceramic implant for premolars according to claim 1, characterized in that, The length ratio of the threaded portion (102) to the smooth column head (101) is 1:(1~1.05).

7. The artificial ceramic implant for premolars according to claim 1, characterized in that, The ratio between the maximum distance between the upper and lower surfaces of the implant neck (103) and the minimum distance between the upper surface of the implant neck (103) and the upper surface of the abutment (2) is 1:(1~1.05).

8. The artificial ceramic implant for premolars according to claim 1, characterized in that, The threaded portion (102) is tapered.

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