Improved split anchoring type maxillary sinus implant

Abstract

The utility model discloses an improved split anchoring type maxillary sinus implant which comprises an implant body, a neck ring and a containing fixing assembly, implant threads are arranged on the outer side face of the implant body, and internal threads are arranged on the inner side face of the neck ring. The containing and fixing assembly comprises two or more bolt plates which can define a hollow channel and enable the implant body to be installed in the hollow channel in an expanding mode, anchoring claws are arranged at the bottom ends of the bolt plates, and internal threads matched with implant threads are arranged on the inner side faces of the bolt plates. A plurality of grooves and external threads matched with the internal threads on the neck ring are arranged on the outer side face of the bolt plate, and the neck ring is arranged at the top end of the bolt plate in a sleeved mode. According to the implant disclosed by the utility model, the neck ring, the hollow channel enclosed by the bolt plate and the implant body are matched to form good clamping force and friction force, so that the implant obtains enough initial stability; and a groove capable of increasing the contact area of bone tissues and the bolt plate is further designed on the outer side surface of the bolt plate, so that the implant obtains the stability in the later stage of implantation.

Description

Technical Field

[0001] The utility model relates to an improved split anchoring maxillary sinus implant, belonging to the technical field of dental implantation. Background Art

[0002] An implant is an artificial tooth root used to replace missing teeth. It is usually made of titanium alloy or ceramic material. It is implanted into the alveolar bone through surgery and fuses with the bone tissue to support and fix the artificial crown.

[0003] There are many factors to consider when placing an implant, and bone mass is one of the most important ones. The bone mass requirement for implants varies from person to person. If the bone mass is insufficient, it will not only increase the difficulty and risk of implant restoration, but also reduce the success rate of the implant surgery. Therefore, when the bone mass is insufficient, bone augmentation surgery or other implant techniques (such as short implants or intraosseous implants) are usually required.

[0004] The maxillary sinus is a cavity located in the maxillary bone, also known as the maxillary sinus cavity or maxillary sinus space. Its size and shape vary from individual to individual. When the maxillary posterior teeth are missing, only the alveolar bone height ≥ 10mm meets the normal bone volume for implantation. However, the thickness of the maxillary bone at this point in most patients is usually less than 10mm. At this time, maxillary sinus lifting and simultaneous implant placement can be used or other implant techniques can be selected to ensure the initial stability of the implant. For example:

[0005] The utility model patent with announcement number CN201303989Y discloses an artificial dental implant that is well applicable to bone plates with a vertical bone height of less than 5mm, including an implant with an external thread, a nut at one end of the implant, a threaded hole in the end surface of the other end of the implant, and a threaded cover connected to the threaded hole. The utility model can implant an artificial dental implant at the same time as the maxillary sinus external lift, reducing one operation and shortening the course of treatment; at the same time, the diameter of the top of the threaded cover is larger than the outer diameter of the implant, so that the top of the threaded cover can play a role in positioning and limiting the bone plate in the implanted area, further ensuring the stability of the connection.

[0006] The utility model patent with the announcement number CN 215688612U discloses a dental short implant assembly, including an implant, an implant base and a central bolt, wherein the outer peripheral wall of the implant is provided with an implant thread, the lower end of the implant base is inserted into a concave cavity provided on the implant, the inner wall of the concave cavity is provided with a first limiting portion, the lower end of the implant base is provided with a second limiting portion that is engaged with the first limiting portion, and the central bolt is installed in the axial hole that passes through the implant base to force the first limiting portion to engage with the second limiting portion. The application realizes the fixed connection between the implant base and the implant through the engaging and engaging of the first limiting portion and the second limiting portion, and further improves the stability of the connection between the implant base and the implant through the central bolt. Compared with the traditional threaded connection or friction fixation connection method, the implant base and the implant are fixed by engaging and engaging, and do not require an excessively long contact length or area, thereby effectively shortening the length of the implant. For people with less alveolar bone, there is no need for bone grafting or maxillary sinus lifting surgery, which effectively reduces the cost of dental implants.

[0007] At present, there is no report on the implant structure that can be used for implant surgery when the remaining alveolar bone height is ≤4mm. Utility Model Content

[0008] The technical problem to be solved by the utility model is to provide an improved split-anchored maxillary sinus implant, which is suitable for patients with maxillary sinus floor alveolar bone height ≤4mm to undergo implant surgery without bone grafting, and obtains better initial stability.

[0009] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0010] An improved split-anchored maxillary sinus implant comprises an implant body with implant threads on the outer side, a neck ring and a receiving and fixing component, wherein the inner side surface of the neck ring is provided with an internal thread, and the receiving and fixing component comprises two or more bolt plates that can enclose a hollow channel and tighten the implant body therein, the bottom end of the bolt plate is provided with an anchoring claw, the inner side surface of the bolt plate is provided with an internal thread matching the implant thread, the outer side surface of the bolt plate is provided with a plurality of grooves and an external thread matching the internal thread on the neck ring, and the neck ring is sleeved on the top end of the bolt plate.

[0011] In the above technical solution, the groove is arranged at the middle part of the outer side surface of the bolt plate, and the external thread is arranged at the top end of the outer side surface of the bolt plate.

[0012] The purpose of setting the groove is to increase the contact area between the bolt plate and the bone tissue, and further improve the connection stability between the implant and the bone tissue. The number of grooves can be one or more than two, and it is specifically set according to needs. Preferably, the grooves are evenly set on the outer side of the bolt plate. The grooves can be set horizontally, vertically or spirally in the middle of the outer side of the bolt plate. Preferably, the grooves are set in the middle of the outer side of the bolt plate in the direction extending from the bottom end of the bolt plate to the top end.

[0013] In the above technical solution, the number of the anchor claws is at least 2, preferably 4 to 8, which are evenly arranged at the bottom end of the bolt plate. It is further preferred that the anchor claws and the bolt plate are an integrally formed structure.

[0014] In the above technical solution, the shape of the hollow channel formed by the butt joint of each bolt plate corresponds to the shape of the implant body and is slightly smaller than the hollow channel of the implant body. For example, when the hollow channel formed by the butt joint of each bolt plate is a cylinder with a diameter of 4.3 mm, the implant body can be a cylinder with a diameter of 4.5-4.8 mm.

[0015] In the present application, the implant body is preferably a columnar structure, and the corresponding hollow channel formed by the docking of the bolt plates is also a columnar structure. In this case, the cross section of each bolt plate is arc-shaped. The number of bolt plates is preferably 2 or 4. When the number of bolt plates is 2, the two bolt plates are symmetrical with each other and the cross section is arc-shaped, i.e., semicircular; when the number of bolt plates is 4, the four bolt plates are symmetrical with each other and the cross section is arc-shaped, i.e., 1 / 4 circular.

[0016] The implant of the utility model is preferably made of titanium alloy which has good biocompatibility with bone tissue.

[0017] Compared with the prior art, the utility model is designed to make the anchoring claws grasp the bone surface at the bottom of the maxillary sinus. When the neck ring is screwed in, the anchoring claws will be in close contact with the bone surface at the bottom of the maxillary sinus, forming an upper and lower clamping force; further, after the implant body is screwed into the hollow channel surrounded by the bolt plates, the implant body is installed in the hollow channel in an expansion manner because the diameter of the implant body is slightly larger than the diameter of the hollow channel. At this time, the bolt plate expands and forms an expansion force with the surrounding bone tissue and a reinforced friction force between the two caused by the expansion; the above forces work together to enable the implant body to obtain sufficient initial stability in the early stage of implantation, which is conducive to the retention of the implant. Furthermore, a vertical groove extending from the bottom end of the bolt plate to the top end is added in the middle of the outer side of the bolt plate, which increases the contact area between the bone tissue and the bolt plate, avoids the possible insufficient bone bonding due to the smooth surface of the bolt plate and the small contact area with the bone tissue, so that the implant can obtain stability in the later stage of implantation while ensuring the initial stability, which is more conducive to the formation of later bone bonding. The above improvements greatly improve surgical efficiency, effectively reduce patients' pain, and provide more options for implant surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of an embodiment of the improved split-anchored maxillary sinus implant described in the utility model.

[0019] Figure 2 for Figure 1 Top view of the illustrated embodiment.

[0020] Figure 3 for Figure 1 Exploded view of the illustrated embodiment.

[0021] The numbers in the figure are:

[0022] 1 bolt plate, 101 anchoring claw, 102 groove, 2 neck ring, 3 implant body. DETAILED DESCRIPTION

[0023] In order to better explain the technical solution of the present invention, the present invention is further described in detail below in conjunction with embodiments.

[0024] See also Figures 1 to 3 The improved split-anchored maxillary sinus implant described in the utility model includes an implant body 3, a neck ring 2 and a accommodating and fixing component, the outer surface of the implant body 3 is provided with an implant thread, the inner surface of the neck ring 2 is provided with an internal thread, the accommodating and fixing component includes two or more bolt plates 1 that can form a hollow channel after docking and can expand and install the implant body 3 therein, the inner surface of the bolt plate 1 is provided with an internal thread matching the implant thread, the outer surface of the bolt plate 1 is provided with a plurality of grooves 102 and an external thread matching the internal thread on the neck ring 2; the bottom end of the bolt plate 1 is provided with an anchoring claw 101, and the neck ring 2 is sleeved on the top of the bolt plate 1.

[0025] In the implant of the utility model, the end of the bolt plate 1 that contacts the bone surface at the bottom of the maxillary sinus is called the bottom end of the bolt plate 1, and the end of the bolt plate 1 that contacts the implant base is called the top end of the bolt plate 1. The groove 102 is arranged in the middle of the outer side of the bolt plate 1, and the external thread is arranged at the top end of the outer side of the bolt plate 1 to facilitate the screwing of the neck ring 2.

[0026] The contact area between the outer side of the bolt plate 1 and the bone tissue is increased by providing the groove 102, thereby improving the connection stability between the implant and the bone tissue. The number of the grooves 102 can be one or more than two, and is specifically provided as needed. Preferably, the grooves 102 are evenly distributed on the outer side of the bolt plate 1. The grooves 102 can be provided in the middle of the outer side of the bolt plate 1 in a horizontal, vertical or spiral manner. Preferably, the grooves 102 are provided in the middle of the outer side of the bolt plate 1 in a direction extending from the bottom end to the top end of the bolt plate 1.

[0027] The implant of the utility model is preferably made of titanium alloy which has good biocompatibility with bone tissue.

[0028] The shape of the implant body 3 of the implant described in the utility model is determined according to needs, and is usually a cylindrical shape. In order to realize the expansion and installation of the implant body 3 in the hollow channel formed by the bolt plates 1, the shape of the hollow channel surrounded by the bolt plates 1 after docking corresponds to the implant body 3 and the diameter is slightly smaller than the implant body 3 (the difference in diameter between the two can be between 0.2 and 0.5 mm). The design of the multi-block bolt plate 1 structure, while satisfying the requirement of placing the implant body 3 therein, cooperates with the anchor claw 101, the bolt plate 1 and the neck ring 2 structure to achieve mechanical screw retention, thereby enhancing the retention force of the implant, thereby ensuring the initial stability of the implant and compensating for the insufficient bone integration caused by insufficient bone height. As for the number of bolt plates 1, it is usually 2 or 4.

[0029] Anchor claws 101 are designed at the bottom end of the bolt plate 1. When the implant is placed in the prepared cavity, as the neck ring 2 is screwed in, the anchor claws 101 will be in close contact with the bone surface at the bottom of the maxillary sinus, forming an upper and lower clamping force. At the same time, the anchor claws 101 will also tightly grasp the bone surface at the bottom of the maxillary sinus to achieve a fixed connection between the implant and the bone tissue. The total number of anchor claws 101 is at least 2, preferably 4 to 8, which are evenly distributed at the bottom end of the bolt plate 1. Considering the overall strength of the implant, it is preferred that the anchor claws 101 and the bolt plate 1 are an integrally formed structure.

[0030] exist Figure 1 In the embodiment shown, the implant body 3 is in a cylindrical shape, and there are two bolt plates 1. The two bolt plates 1 are symmetrical to each other and have a semicircular cross-section. When the two bolt plates 1 are butt-jointed, they form a hollow channel (the hollow channel is also called a retention bolt channel) in which the cylindrical implant body 3 can be expansion-tightened and installed. The total number of anchor claws 101 is 6, which are evenly arranged at the bottom ends of the two bolt plates 1, and each anchor claw 101 is an integrally formed structure with the bolt plate 1.

[0031] When the implant described in the utility model is used in a specific implantation operation, after completing local anesthesia and stripping soft tissue, a hole is prepared according to the width and height of the jaw bone, and after reaching the maxillary sinus mucosa, the maxillary sinus mucosa is stripped, and two or more bolt plates 1 are respectively placed in the hole, at which time the anchoring claws 101 at the bottom of the bolt plate 1 grasp the bone surface at the bottom of the maxillary sinus; then the neck ring 2 is screwed in from the top of the bolt plate 1; finally, the implant body 3 is screwed into the hollow channel (i.e., the retention bolt channel) surrounded by two or more bolt plates 1 through a thread. As the implant body 3 is screwed in, the bolt plate 1 will gradually expand, forming a stronger friction force with the surrounding bone tissue, and at the same time, the anchoring claws 101 will also tightly grasp the bone surface at the bottom of the maxillary sinus, thereby achieving a fixed connection between the implant and the bone tissue. Combined with the vertical groove 102 extending from the bottom end to the top end of the bolt plate 1 in the middle of the outer side of the bolt plate 1, the contact area between the bone tissue and the bolt plate 1 is increased, avoiding the insufficient bone integration that may exist due to the smooth surface of the bolt plate 1 and the small contact area with the bone tissue, so that the implant can obtain stability in the later stage of implantation while ensuring the initial stability, which is more conducive to the formation of later bone integration. In the utility model, the anchor claw 101, the bolt plate 1, the implant body 3 and its expansion-tight installation in the retention bolt channel, and the neck ring 2 cooperate to achieve mechanical spiral retention, which greatly compensates for the insufficient bone integration caused by insufficient bone height.

[0032] In a specific application, the length of the anchoring claw 101 in the implant (ie, the claw arm) is preferably slightly smaller than the diameter of the cavity, and the specific width of the prepared cavity is determined according to the patient's bone mass.

Claims

1. An improved split anchoring maxillary sinus implant, comprising an implant body (3) with an implant thread on the outer surface, characterized in that: It also includes a neck ring (2) and a receiving and fixing component, the inner side surface of the neck ring (2) is provided with an internal thread, the receiving and fixing component includes two or more bolt plates (1) that can enclose a hollow channel and tighten the implant body (3) therein, the bottom end of the bolt plate (1) is provided with an anchoring claw (101), the inner side surface of the bolt plate (1) is provided with an internal thread matching the implant thread, the outer side surface of the bolt plate (1) is provided with a plurality of grooves (102) and an external thread matching the internal thread on the neck ring (2), and the neck ring (2) is sleeved on the top end of the bolt plate (1).

2. The improved split-anchored maxillary sinus implant according to claim 1, characterized in that: The groove (102) is arranged at the middle part of the outer side surface of the bolt plate (1), and the external thread is arranged at the top end of the outer side surface of the bolt plate (1).

3. The improved split-anchored maxillary sinus implant according to claim 2, characterized in that: The groove (102) is arranged in a direction extending from the bottom end to the top end of the bolt plate (1).

4. The improved split anchored maxillary sinus implant according to any one of claims 1 to 3, characterized in that: The number of the anchor claws (101) is at least 2 and they are evenly distributed at the bottom end of the bolt plate (1).

5. The improved split anchored maxillary sinus implant according to any one of claims 1 to 3, characterized in that: The anchor claw (101) and the bolt plate (1) are an integrally formed structure.

6. The improved split anchored maxillary sinus implant according to any one of claims 1 to 3, characterized in that: The number of the bolt plates (1) is 2 or 4, and the bolt plates (1) are connected to form a hollow channel with a shape corresponding to the implant body (3) and a diameter slightly smaller than the implant body (3).

7. The improved split-anchored maxillary sinus implant according to claim 6, characterized in that: The implant body (3) is a columnar structure, and the cross section of the bolt plate (1) is arc-shaped.

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