A non-coaxial implantation system and design method thereof

Abstract

The present invention belongs to the technical field of dental implants, and relates to a non-coaxial implant system, including an implant, an abutment, a center screw and a crown; the implant and the abutment, and the implant and the center screw are connected in a non-coaxial linear manner, and the abutment and the center screw are connected in a coaxial linear manner, which can ensure that the center screw opening is located on the lingual side of the crown, which is beautiful; it can ensure that the screw-retained crown with the opening on the lingual side of the crown is made, thereby completely avoiding the risk caused by adhesive residue; when making an adhesive-retained crown, it can ensure that the crown is removed together with the abutment after being bonded in the mouth, thereby thoroughly cleaning the adhesive; it can ensure that the center screw opening is located on the lingual side of the crown when the degree of alveolar bone inclination is different; in order to avoid the area of ​​the implant corresponding to the end of the center screw being thinner, the implant diameter is thickened at this location, and then gradually becomes thinner in the neck and root directions, which can ensure the thickness of the implant wall at the bottom end of the corresponding center screw and is not easy to break.

Description

Technical Field

[0001] The present invention belongs to the technical field of dental implants, and in particular relates to a non-coaxial implant system and a design method thereof. Background Art

[0002] Dental implants are widely known as "the third set of teeth for humans". Implant 1 is equivalent to the root of the tooth and is an implant embedded in the alveolar bone. The structure that passes through the gums and can be inserted into the implant is called abutment 2. The abutment 2 and the implant are fixed together by a central screw 3. Finally, the artificial crown 4 is bonded to the abutment 2 with an adhesive ( Figure 1 , Figure 2 ), completing the dental implant restoration. However, the adhesive used to fix the crown 4 often remains around the base 2 or the implant 1, causing inflammation of the gums and alveolar bone around the implant 1, and eventually leading to alveolar bone absorption, implant exposure, loosening and falling off, and ending in failure ( Figure 3 , Figure 4 Therefore, an ideal treatment method is to have the center screw 3 opening of the base 2 located on the lingual side of the crown 4 (the side of the tooth close to the tongue). In this case, the crown 4 can be made open at the screw opening corresponding to the base 2 (i.e., a hole is also opened at the corresponding position) ( Figure 5 ), after the crown 4 is fixed in the mouth, the center screw 3 is loosened through the opening, the crown 4 and the base 2 (which have been bonded as a whole at this time) are taken out together, the excess adhesive is thoroughly removed and highly polished, the crown 4 is put back in, and the center screw 3 is tightened to close the screw mouth to complete the final restoration.

[0003] However, in the current implant system, the implant 1 and the base 2, and the base 2 and the center screw 3 are connected in a coaxial and linear manner (such as Figure 1 As shown), we want to achieve Figure 5 The effect cannot be achieved. In addition, the alveolar bone is inclined toward the labial side. In order to ensure that the implant 1 is located in the alveolar bone, the implant must also be implanted inclined toward the labial side. Therefore, most of the screw openings of the abutment 2 are forced to be located at the labial side or the incisal end of the crown 4, which will greatly affect the appearance (see Figure 6 , Figure 7 ). Therefore, the patient is forced to use a crown 4 without drilling holes and adhesive fixation for restoration. After adhesive fixation, the crown 4 and the base 2 cannot be removed together because the screw hole has been covered by the crown 4, and the residual adhesive cannot be completely removed, which poses a risk factor.

[0004] However, currently, there is no implant system with non-coaxial, linear connections between the implant 1 and the abutment 2 , and between the abutment 2 and the center screw 3 , to ensure that the screw opening of the abutment 2 is located on the lingual side of the crown 4 . Summary of the invention

[0005] The object of the present invention is to provide a non-coaxial implant system and a design method thereof, which solves the problem that conventional implants cannot ensure that the screw opening of the base is located on the lingual side of the crown.

[0006] The present invention is achieved through the following technical solutions:

[0007] A non-coaxial implant system comprising an implant, an abutment, a center screw and a crown;

[0008] The implant and the abutment, and the implant and the center screw are connected in a non-coaxial linear manner, while the abutment and the center screw are connected in a coaxial linear manner;

[0009] There is a screw hole on the lingual side of the crown;

[0010] The diameter of the implant is largest at the end of the center screw and gradually becomes thinner towards the neck and root end of the implant.

[0011] Furthermore, there is an axial angle between the axial centerline of the implant and the abutment, and the angle is 12-30°.

[0012] Furthermore, the axial angle between the implant and the abutment is 15°.

[0013] Furthermore, the implant has a deep thread and large pitch design from the maximum diameter to the root end;

[0014] The implant part from the maximum diameter to the neck adopts a shallow thread and small pitch design.

[0015] Furthermore, the thread depth of the deep thread is >0.5 mm, and the pitch of the large pitch is >0.5 mm.

[0016] Furthermore, the thread depth of the shallow thread is ≤0.5 mm, and the pitch of the small pitch is ≤0.5 mm.

[0017] Furthermore, the diameter of the implant is determined according to the size of the teeth in different positions and the width of the alveolar bone.

[0018] Furthermore, the diameter of the implant is 3.25 mm-4.5 mm.

[0019] The present invention also discloses a design method of the non-coaxial implantation system, comprising the following steps:

[0020] S1. Based on the dental CT data, the width, height and labial inclination of the alveolar bone in the implant area are preliminarily observed, three-dimensional reconstruction is performed, implant placement is simulated, and the required axial angle between the implant and the abutment is measured when the screw hole is expected to be located on the lingual side of the crown, and the axial inclination angle between the implant and the abutment is determined;

[0021] S2. Determine the appropriate implant diameter and length.

[0022] Further, in S2, the diameter of the implant is determined according to the size of the teeth at different positions and the width of the alveolar bone;

[0023] The length of the implant is determined according to the alveolar bone height and the position of the missing teeth.

[0024] Compared with the prior art, the present invention has the following beneficial technical effects:

[0025] The present invention discloses a non-coaxial implant system, wherein the implant and the base, and the implant and the center screw are connected in a non-coaxial linear manner, and the base and the center screw are connected in a coaxial linear manner, so that there is an axial angle between the axial center lines of the implant and the base, which can ensure that the center screw opening of the base is located on the lingual side of the crown, thereby ensuring an aesthetic effect; the present invention can ensure that a screw-retained crown with an opening on the lingual side of the crown is produced, thereby completely avoiding the risk caused by adhesive residue; and when producing an adhesive-retained crown, the present invention can ensure that the crown is removed together with the base after being bonded in the mouth, thereby thoroughly cleaning the adhesive; the present invention can ensure that the center screw opening of the base is located on the lingual side of the crown when the degree of inclination of the alveolar bone is different; in order to avoid the implant being thin in the area corresponding to the end of the center screw, the implant diameter is thickened at this location, and then gradually becomes thinner in the neck and root directions, thereby ensuring the thickness of the implant wall at the bottom end of the corresponding center screw, which is not easy to break.

[0026] Furthermore, based on the analysis of big data on the width of the patient's alveolar bone and the degree of labial inclination, the axial angle between the axial centerline of the implant and the abutment was designed to be in the range of 12-30°.

[0027] Furthermore, in order to reduce the grinding of alveolar bone during implantation, the implant portion from the maximum radial root end adopts a deep thread and a large pitch design, and the implant portion from the maximum radial neck portion adopts a shallow thread and a small pitch design. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a split diagram of a conventional dental implant with a coaxial linear connection;

[0029] Figure 2 for Figure 1 Dental implant combination diagram;

[0030] Figure 3 Photo of a dental implant with residual adhesive around the abutment;

[0031] Figure 4 This is a photo of a patient who suffered from peri-implant inflammation due to residual adhesive, resulting in a large amount of alveolar bone defect around the implant and loose implants;

[0032] Figure 5This is a photo of the opening on the lingual side of the crown;

[0033] Figure 6 This is a simulation image of a hole opened on the labial surface of a crown after a conventional implant is implanted in the direction of the alveolar bone;

[0034] Figure 7 This is a photo of a tooth after a conventional implant is implanted in the direction of the alveolar bone and a hole is opened on the labial surface of the crown;

[0035] Figure 8 It is a structural schematic diagram of the non-coaxial implantation system of the present invention;

[0036] Fig. 9 This is a simulation diagram of the non-coaxial implant system of the present invention.

[0037] Among them, 1. Implant; 2. Abutment; 3. Center screw; 4. Crown. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention more clear, the following is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, not all embodiments.

[0039] The components described and shown in the drawings and embodiments of the present invention may be arranged and designed in various configurations. Therefore, the detailed description of the embodiments of the present invention provided in the following drawings is not intended to limit the scope of the claimed invention, but merely represents a selected embodiment of the present invention. Based on the drawings and embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0040] It should be noted that the terms "comprises", "includes" or any other variations are intended to cover non-exclusive inclusion, so that a process, element, method, article or equipment that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to the process, element, method, article or equipment.

[0041] like Figure 8 As shown, the present invention designs a non-coaxial implant system, including an implant 1, an abutment 2, a center screw 3 and a crown 4; the implant 1 and the abutment 2, the implant 1 and the center screw 3 are connected in a non-coaxial, linear manner, and the abutment 2 and the center screw 3 are connected in a coaxial, linear manner.

[0042] In order to prevent the implant 1 from being thinner in the area corresponding to the end of the central screw 3, the diameter of the implant 1 is thickened at this location and then gradually becomes thinner in two directions of the neck and the root end.

[0043] In order to reduce the grinding of alveolar bone during implantation, the portion of implant 1 from the maximum diameter to the root end adopts a deep thread and a large pitch design, and the portion of implant 1 from the maximum diameter to the neck adopts a shallow thread and a small pitch design.

[0044] Generally, the thread depth of deep threads is >0.5mm, and the pitch of large pitch threads is >0.5mm;

[0045] The thread depth of shallow thread is ≤0.5mm, and the pitch of small pitch is ≤0.5mm.

[0046] In order to ensure that the screw hole of the base 2 is on the lingual side of the crown 4 when the alveolar bone is tilted to different degrees, the angle between the long axis of the implant 1 and the long axis of the base 2 or the center screw 3 is different and is designed to be 12-30°.

[0047] In order to adapt to the size of teeth in different positions and the width of the alveolar bone, the implant 1 is designed with different diameters, generally 3.25mm, 3.5mm, 3.75mm, 4.1mm, and 4.5mm.

[0048] The features and performances of the present invention are further described in detail below in conjunction with the embodiments.

[0049] The working process of the present invention is as follows:

[0050] S1. Based on the dental CT data, the width, height and labial inclination of the alveolar bone in the implant area are preliminarily observed, and three-dimensional reconstruction is performed to simulate the implantation of the implant 1. The required axial angle between the implant 1 and the abutment 2 (center screw 3) is measured when the screw hole is expected to be located on the lingual side of the crown 4, such as Fig. 9 As shown, if you want to make the screw hole on the lingual side of crown 4, you need to use an implant system with a 15° angle.

[0051] The length of the implant 1 is determined according to the height of the alveolar bone and the position of the missing tooth, and the appropriate diameter of the implant 1 is determined according to the size of the tooth and the width of the alveolar bone.

[0052] S2. After routine implant cavity preparation, implant 1 is implanted, ensuring that the screw channel opening of the implant is located on the lingual side ( Fig. 9 ).

[0053] S3. After the implant 1 is bone-integrated, the implant crown 4 with the lingual opening is routinely restored.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A non-coaxial implant system, characterized in that: It includes an implant (1), an abutment (2), a center screw (3) and a crown (4); The implant (1) and the base (2), and the implant (1) and the center screw (3) are connected in a non-coaxial linear manner, and the base (2) and the center screw (3) are connected in a coaxial linear manner; A screw hole is provided on the lingual side of the crown (4); The diameter of the implant (1) is the largest at the end of the corresponding center screw (3), and gradually becomes thinner in two directions toward the neck and root end of the implant (1); There is an axial angle between the axial center lines of the implant (1) and the abutment (2), and the angle is 12-30 degrees.

2. A non-coaxial implant system according to claim 1, characterized in that: The axial angle between the implant (1) and the base (2) is 15°.

3. The non-coaxial implant system according to claim 1, characterized in that: The implant (1) has a deep thread and a large pitch design from the maximum diameter to the root end; The thread depth of deep thread is >0.5mm, and the pitch of large pitch is >0.5mm; The implant (1) has a shallow thread and a small pitch design from the maximum diameter to the neck; The thread depth of shallow thread is ≤0.5mm, and the pitch of small pitch is ≤0.5mm.

4. The non-coaxial implant system according to claim 1, characterized in that: The diameter of the implant (1) is determined according to the size of the teeth at different positions and the width of the alveolar bone.

5. The non-coaxial implant system according to claim 4, characterized in that: The diameter of the implant (1) is 3.25 mm to 4.5 mm.

6. The design method of the non-coaxial implant system according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Based on the dental CT data, the width, height and labial inclination of the alveolar bone in the implant area are preliminarily observed, three-dimensional reconstruction is performed, the implantation of the implant (1) is simulated, and the size of the axial angle between the implant (1) and the abutment (2) required when the screw hole is expected to be located on the lingual side of the crown (4) is measured, and the axial inclination angle between the implant (1) and the abutment (2) is determined; S2. Determine the appropriate diameter and length of the implant (1).

7. The design method of a non-coaxial implant system according to claim 6, characterized in that: In S2, the diameter of the implant (1) is determined according to the size of the teeth at different positions and the width of the alveolar bone; The length of the implant (1) is determined according to the alveolar bone height and the position of the missing teeth.

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