CN101366664A - Hollow short implant for dental implant - Google Patents

Abstract

The invention relates to a hollow short implant for dental implant, which includes two structures of one-stage and two-stage; the one-stage implant part and the abutment part are connected as one; the two-stage type includes the implant, a bridge ring and a central bolt ;The cylindrical helix around the implant is divided into three sections, and the main body of the implant has a zigzag double thread that can bear a large load; the hollow structure of the implant retains a living bone column with blood supply at the base, which strengthens the relationship between bone and implant. The support strength of the implant; the self-tapping groove can make the bone tissue grow and heal inside and outside the implant; the platform transfer design makes the gingival cuff around the implant more reliable and avoids bone resorption caused by micro-movement and micro-leakage. The dental short implant of the present invention achieves osseointegration inside and outside the implant, increases the osseointegration area and the early and long-term support strength, and has fast implantation, high strength, good early retention, and high long-term success rate, which solves the conventional oral implant technology. Confronted with a difficult problem in the molar area of the upper and lower jaws.

Description

Hollow short implant for dental implant

technical field

The invention belongs to the technical field of dental implants, and relates to a hollow short dental implant with fast implantation, high osseointegration strength and early retention.

Background technique

As the artificial tooth root of the denture retention device, dental implants in the oral cavity have been widely used in the restoration of single tooth defect, partial tooth defect and complete tooth loss in the oral cavity. However, in clinical work, many patients are limited by factors such as insufficient alveolar bone volume or cavity, sinus, neural tube, etc. To solve the problem of insufficient bone volume, bone graft surgery is usually used to increase the height of the bone, but Because the bone grafting operation itself also has its own risks, and the bone grafting process takes a long time and costs a lot, it is difficult for many patients to accept it. Using shorter implant lengths avoids the risks and costs associated with bone graft surgery.

There have been more than ten years of basic and clinical research on short implants at home and abroad. Internationally, implants smaller than 7mm are usually called short implants. Implants have clear advantages. Tuncelli (1997) etc. applied the finite element method to compare the stress distribution of ITI hollow cylindrical two-stage implants with different diameters (3.5mm, 4.5mm, 6mm). It was found that relatively larger diameter implants are more favorable for stress distribution in the posterior region of the mandible. Zhang Shaofeng (1997) used finite element method to study the influence of implant length and diameter on the stress of implanted complete dentures, and concluded that the stress of the bone interface around the implant is closely related to the length of the implant, showing a negative correlation. Many scholars have proposed that the shortest length of the implant should not be less than 7mm, and the diameter can be increased to increase the bonding area with the bone tissue. Frandsen PA, Chtistffersen H, Madsen T. and others confirmed in 1998 that adding threads to the surface of cylindrical implants can help enhance the initial stability and early retention of implants, and the osseointegration strength is higher.

In the prior art prior to the present invention, commonly used short implant systems include Branemark system, Nobelspeedy, bicon, Innova, Sybronpro, Neodent, etc., as well as designs disclosed in patent documents such as WO2008016205A1 and US20080113316A1. The solid design of the implant, and the combination with the bone tissue can only rely on the very limited surface area of the implant peripheral thread to contact the bone tissue to achieve the purpose of osseointegration. This design has limitations in implantation depth and early retention. , Increase the area of osseointegration and other insurmountable defects. In order to achieve better osseointegration of short implants, some short implants have holes in their bottoms or bodies, hoping that bone tissue can grow into them, such as the designs disclosed in patent documents such as US6918766B1 and US20070292820A1. However, this form of ingrowth is very passive, and bone growth factor induction is often required clinically, and its success rate is very low. This design of opening holes in the implant body is also more common in implants of regular length, such as the now obsolete ITI implant developed by Schroeder and Sutter in Switzerland in 1974. In this implant, there are holes in the wall of the empty tube. There are hollow open cylindrical implants, closed cylindrical implants and hollow double blue cylindrical implants, as well as designs disclosed in patent documents such as JP2005342157A, US2004081941A1, US2003224328A1, and US2006014120A1.

In the prior art before the present invention, there is also a cylindrical threaded solid implant with a short length to a cylindrical smooth hollow design, but because the bone drill prepares the implant socket, the hollow part of the implant has no bone tissue after implantation, and It relies on bone tissue to grow into it, and it is difficult to fill the hollow part with bone tissue, and it is even more difficult to achieve satisfactory osseointegration. Designs disclosed in patent documents such as US2008057477A1. In addition, Nobel, Bicon, Innova and other companies have also released their own short implant products, which are all solid implants. Due to the limitations and defects of the short length, the osseointegration area is limited to a certain extent, resulting in a small osseointegration area. The body is not easy to survive, or the strength is low and cannot support the function of the denture for a long time.

Contents of the invention

In view of the above-mentioned state of the art, the purpose of the present invention is to provide a short hollow implant mainly used in the molar region (posterior teeth) of the upper and lower jaws, and its structural design should achieve high bonding strength between the implant and the alveolar bone. , has the functions of anti-pullout, anti-sinking and transmission of dispersed occlusal force, so that it can achieve double-layer osseointegration between the alveolar bone and the implant inside and outside, the stress is dispersed, the position is tight, the strength is high, the implant is tight, and the increase The purpose of early and long-term support strength, convenient and quick screwing into the implant.

Now design of the present invention and technical solution are described as follows:

An oral implant system design that meets clinical medical requirements, especially for short implants in special parts of the human body. Maximizing the bonding area with bone tissue to achieve good osseointegration is the key to the success of the implant. The good thread shape design around the body increases the possibility of osseointegration area, and the reasonable pitch can make the screwing into the implant more convenient and fast. When the implant and the abutment form a platform conversion form, the gingival epithelial cuff around the implant can be closed It is more rigorous and reliable, avoiding bone resorption caused by micro-leakage of periodontal pockets, which directly affects the success and long-term effect of implant denture restoration. In addition, due to the special relationship between the upper and lower jaw anatomical structures, it is strictly forbidden to damage the maxillary sinus and mandibular canal 5 due to the relationship between the length of the implant. Once the nerves and blood vessels running in the mandibular canal 5 are damaged, it will inevitably cause irreversible damage to the patient The implant less than 7mm can be implanted in the bone tissue more than 2mm away from the upper wall of the mandibular canal 5, which makes up for the defect that the traditional alveolar bone resorption cannot be implanted in the molar area of edentulous patients.

Based on the consideration of the above design concepts, the oral implant designed in the present invention includes two structures: a one-stage hollow short implant and a two-stage hollow short implant.

One-piece hollow short implant (referring to Fig. 1, 2, 3, 4, 5), has implant part 10 and abutment part 20, is characterized in that: implant part 10 and abutment part 20 are integral structure; abutment The upper part of the part 20 is an inverted conical circular platform 25; the lower part is a positive curved circular platform 24; there is a bevel 28 between the inverted conical circular platform 25 and the positive curved circular platform 24; 11. The middle part is the main part 12, and the lower part is the cone part 13; 1~3 self-tapping grooves 16 are opened on the lower part of the implant part 10, and the inside of the main part 12 and the cone part 13 is a hollow part 18.

The two-stage hollow short implant (see Figures 9 and 10) has an implant portion 10 and an abutment portion 20, and is characterized in that: the implant portion 10 and the abutment portion 20 are the lower section of the hollow short implant, and the bridging ring 31 is the upper section of the hollow short implant, and the upper and lower sections are connected into one body through the fixing bolt 35 and the internal threaded hole 30 of the abutment part 20; the bridge ring 31 has an inverted cone hole 33 that can cooperate with the inverted cone 25 and The inner hole 34, the upper end of the fixing screw 35 has a hexagram groove 38; the upper part of the abutment part 20 is an inverted conical circular platform 25; The upper part of the implant part 10 is connected with the positive curve round platform 24 is the shoulder part 11, the middle part is the main part 12, and the lower part is the cone part 13; the lower part of the implant part 10 is opened with 1 to 3 self-tapping grooves 16, the main part 12 and the inside of the cone portion 13 is a hollow portion 18 .

According to the above-mentioned one-stage or two-stage hollow short implant, it is characterized in that: the depth of the hollow short implant implanted into the bone tissue 6, 7 is more than 2 mm from the upper wall of the mandibular canal 5, and the length of the implant part 10 is less than 7 mm.

According to the above-mentioned one-stage or two-stage hollow short implant, it is characterized in that: the outer periphery of the shoulder portion 11 of the implant part 10 has fine threads 14, and the outer peripheries of the main body part 12 and the cone part 13 have double threads. Thread 15; said abutment part 20, which has a groove 27 and a cut surface 43 of its symmetry plane on its inverted conical circular platform 25; positive curved circular platform 24 and implant shoulder platform 22 form a platform conversion form 8.

According to the above-mentioned one-stage or two-stage hollow short implant, it is characterized in that: the implant part 10 is a hollow structure 18, and the bone tissue of the hollow part 18 of the implant 10 is retained when the implant is prepared in place. 6 and cortical bone 7, not only can enhance the supporting strength of bone and implant for the living bone column 50 with base and blood supply, but also can form a good osseointegration between the hollow wall surface 51 of the implant 10 and the bone column 50, It achieves the purpose of forming double-layer osseointegration with bone tissue inside and outside the implant at the same time, and makes up for the shortcomings of short implants that are difficult to succeed and have low strength due to the small osseointegration area.

According to the above-mentioned one-stage or two-stage hollow short implant, it is characterized in that: there are 1 to 3 self-tapping grooves 16 penetrating the inside and outside of the hollow part 18 in the implant part 10, which not only have the function of cutting bone tissue and self-tapping, Moreover, the pores formed by the internal and external self-tapping grooves 16 increase the connection area of the interface, reduce the average stress level of the interface, and allow the bone tissue inside and outside the implant to grow and heal through the internal and external penetration of the self-tapping groove, and the combination relationship is It is the locking relationship between the bony protrusion protruding into the pore and the pore, which strengthens the osseointegration.

According to the above one-stage or two-stage hollow short implant, it is characterized in that: the outer diameter of the implant part 10 is 5-7mm, the diameter of the hollow part 18 is 3mm-5mm, and the length of the implant part 10 is 5mm-7mm.

According to the above-mentioned one-stage or two-stage hollow short implant, it is characterized in that: the length ratio of the shoulder portion 11, the main body portion 12, and the vertebral body portion 13 of the implant portion 10 is about 0.8 to 1.2 : 4～6: 0.8～1.2.

According to the above-mentioned one-stage or two-stage hollow short implant, it is characterized in that: the parameters of the outer peripheral fine thread 14 of the shoulder portion 11 are: pitch 0.23-0.27mm, tooth height 0.06mm-0.10mm; the main body 12 The outer peripheral thread double thread 15 is zigzag, in which the pitch of the large thread parameters is 0.8mm~1.2mm, the tooth height is 0.4mm~0.6mm, the working side β=34°~38°, and the non-working side β=2°~6° , The tooth shape angle α is 35°～45°, and the tooth height of the small thread is 0.17mm～0.21mm.

According to the above-mentioned one-stage or two-stage hollow short implant, it is characterized in that: the inside of the mounting ring 31 is a hollow inner hole 34 and an inverted conical truncated cone 33; the inner hole 34 can penetrate 37; The inverted tapered circle 25 of the platform part fits in the socket, and the groove 32 at the bottom end of the lower opening 36 coincides with the groove 28 of the abutment part.

According to the above-mentioned one-stage or two-stage hollow short implant, it is characterized in that: the groove of the bottom end groove 32 and the groove of the abutment portion 28 are 45°.

The advantage of the present invention compared with prior art is:

1. Hollow structure: The bone tissue in the hollow part of the implant is preserved as a living bone column with a base and blood supply, which not only enhances the support strength between the bone and the implant, but also makes the surface of the hollow wall of the implant form a good relationship with the bone column The osseointegration achieves the purpose of forming double-layer osseointegration with the bone tissue inside and outside the implant at the same time, which makes up for the shortcomings of short implants that are difficult to succeed and low in strength due to the small osseointegration area.

2. Self-tapping slots: Three self-tapping slots penetrating the inside and outside of the implant not only have the function of cutting bone tissue and self-tapping threads, but also the pores formed by the self-tapping slots penetrating inside and outside increase the connection area of the interface and reduce the interface The average stress level, and the bone tissue inside and outside the implant can grow and heal through the internal and external self-tapping grooves. The combination relationship is the locking relationship between the bony protrusions protruding into the pores and the pores, which strengthens the osseointegration.

3. The fine thread on the shoulder of the implant can increase the contact area between the implant and the bone tissue at the edge of the cortical bone where the stress is concentrated, retain the bone tissue, reduce unnecessary loss, and strengthen the early retention of the cortical bone.

4. The main part of the implant has a zigzag double thread, which can bear a larger load and better transmit the vertical force so as to reduce the shear force from the restoration. The osseointegration area of the implant is increased, and the implant is screwed in more conveniently and quickly. The thread of the double-threaded implant surrounds the implant at a steeper angle. During the implantation process, the apical torque gradually increases the bone pressure, thereby enhancing the stability of the implant in the bone. The larger the pitch, ie the fewer the threads, the easier it is to tap and place the implant.

5. The platform transfer design makes the gingival epithelial cuff around the implant more reliable and avoids bone resorption caused by micro-movement and micro-leakage.

6. The outer diameter of the implant part is 6mm, the diameter of the hollow part is 4mm, and the length of the implant part is 5mm, 6mm, 7mm, which makes up for the defect that the traditional alveolar bone absorption and edentulous patients cannot be implanted in the molar area.

7. Two-stage hollow short implants can be applied to the molar area of patients with alveolar bone resorption and edentulous full-mouth implants, because its upper structure bridge ring and fixing screws are consistent with the structure of long implants, so regardless of the implant Whether the denture restoration design is a bar-type overdenture or a nail-retained fixed denture, both can be used together with long implants, which makes up for the defect that the traditional alveolar bone resorption and edentulous patients cannot be implanted in the molar area.

Description of drawings

Figure 1: Outline schematic diagram of one-piece hollow short implant

Figure 2: Schematic diagram of the cross-section of a one-piece hollow short implant implanted in the gingiva

Figure 3: Plane schematic diagram of each part of a one-piece hollow short implant

Figure 4: Three-dimensional schematic diagram of each part of a one-piece hollow short implant

Figure 5: Sectional view of a one-piece hollow short implant

Figure 6: Parameters of each thread pitch of the hollow short implant embodiment

Figure 7: Bottom view of Figure 1

Figure 8: Top view of Figure 1

Figure 9: Schematic diagram of the three-dimensional parts of the two-stage hollow short implant

Figure 10: Sectional view of Figure 9

Figure 11: Schematic diagram of specific implementation method 1

Figure 12: Schematic diagram of the specific implementation method 2

Figure 13: Schematic diagram of the specific implementation method 3

Figure 14: Schematic diagram of the specific implementation method 4

Figure 15: Schematic diagram of the specific implementation method 5

Figure 16: Schematic diagram of the cross-section of a one-piece hollow short implant in place

Figure 17: Schematic diagram of the in-situ cross-section after wearing the healing cap

Detailed ways

Below are specific embodiments of the present invention, but are not limited to specific embodiments, now in conjunction with accompanying drawing the present invention will be further described:

See Figures 1, 2, 3, 4, 5:

The one-piece hollow short implant is an implant in which the implant part 10 and the abutment part 20 are integrated. The outer circumference of the implant part 10 is designed as a cylindrical helix, which not only facilitates the smooth and effective screwing of the implant into the bone tissue, but also ensures bone extrusion. The role to improve the early retention of implants. The special thread design increases the osseointegration area with bone tissue. The outer cylindrical helix of the implant part 10 is divided into three sections, the upper section is the implant shoulder part 11, and the thread of the shoulder part 11 is a fine thread 14, and the screw parameters are pitch 0.25 mm, tooth height 0.08 mm. The fine threads on the shoulder can strengthen the early retention of the cortical bone 7, increase the contact area between the cortical bone implant and bone tissue under stress concentration, and reduce unnecessary loss of bone tissue when preparing the implant socket. The middle section is the main body 12 of the implant 10, and the thread is a zigzag double thread 15. The zigzag thread combines the advantages of high efficiency of the rectangular thread and high strength of the root of the trapezoidal thread, and can bear a larger load and better transmit vertical force, thereby Reduces shear forces from the restoration. The double thread 15 increases the bonding force and the bonding area between the implant 10 and the bone tissue 6, and surrounds the periphery of the implant at a steeper angle during the implantation process. The stability in the bone, and the operation of screwing into the implant part is more convenient and quick. Its characteristics: zigzag double thread 15, the pitch of the large thread is 1.0mm, the tooth height is 0.5mm, the working side β=36°, the non-working side β=4°, the tooth profile angle α is 40°, and the tooth height of the small thread is 0.19 mm. The larger the pitch, ie the fewer the threads, the easier it is to tap and place the implant. The lower section is the taper part 13 of the implant 10, the thread parameters of the taper part 13 of the implant are the same as those of the main body 12, and the peripheral cutting taper angle is 26°. There are three self-tapping grooves 16 penetrating inside and outside on the implant part 10, which not only have the functions of cutting the bone wall and self-tapping and extruding the bone, but also play a guiding role when the implant is screwed into the implant to facilitate implantation. Moreover, the pores formed by the internal and external self-tapping grooves increase the connection area of the interface, reduce the average stress level of the interface, and allow the bone tissue inside and outside the implant to grow and heal through the internal and external penetration of the self-tapping groove. The combination relationship is The locking relationship between the bone protruding into the pore and the pore strengthens the osseointegration. The main body part 12 and the cone part 13 of the implant 10 are hollow design 18, when preparing the implant in place 46, the living bone column with the base and blood supply accommodated in the implant hollow part 18 is reserved, which not only strengthens the bone The support strength of the implant and the surface of the hollow 18 wall of the implant 10 form a good osseointegration, so that the inside and outside of the implant 10 and the bone tissue form a double-layer osseointegration at the same time, making up for the short implant due to the low osseointegration area strength Low, not easy to succeed flaws. The implant bottom 17 is a hollow opening. The length ratio of the three sections of the shoulder, main body and vertebral body of the peripheral cylindrical helical design of the implant is about 1:5:1. The outer diameter of the implant part is 6mm, the diameter of the hollow part is 4mm, and the length of the implant part is designed to be 5mm, 6mm, and 7mm respectively, which makes up for the defect that the traditional alveolar bone absorption and edentulous patients cannot be implanted in the molar area. The abutment portion 20 is a rotating body whose outer circumference is inversely conical, positively curved, and positively conical from top to bottom. The rotating body is a solid body. To facilitate the positioning of the crown, there is a groove 27 and a cut surface 43 on the surface of the cone 26. The design of the groove and the cut surface not only fixes the tool wrench for easy screwing in but also prevents the crown from rotating. effect. There is a bevel 28 under the inverted conical circular platform 25, the angle is 45 degrees, and the height is 0.5mm. The lower edge 29 of the groove is closely matched. The positive curve circular platform 24 is the part where the abutment passes through the gingiva. According to the different thicknesses of the gingiva, different lengths such as 1mm, 2mm, and 4mm are designed. The diameter is greater than the diameter of the abutment to form a platform conversion form 8, that is, when the diameter of the implant is greater than the diameter of the abutment, the epithelial cuff of the gingiva 8 around the implant is more reliable, and the bone resorption caused by microleakage is prevented.

See Figures 9 and 10:

The implant part 10 and the abutment part 20 of the two-stage hollow short implant are the lower part of the hollow short implant, and the bridge ring 31 is the upper part of the hollow short implant, through which the fixing bolt 35 and the inner threaded hole of the abutment part 20 30 connects the upper and lower sections; all features of the implant are the same as the one-piece hollow short implant, except that the body of the abutment has an internally threaded hole 30 with a diameter of 2mm and a length of 3.5mm. The inside of the bridge ring 31 has an inverted conical circular platform hole 33, and the bottom bevel 32 forms a tight connection with the inverted conical circular platform 25 and groove 28 of the abutment, and the fixing screw 35 passes through the inner hole 34 of the upper mouth of the bridge connecting ring. The lower opening 36, the bolt part 37 is screwed into the internal thread of the abutment body, and the six-flower groove 38 in the upper part of the fixing screw is convenient for a tool wrench to screw in.

See Figures 11, 12, 13, 14, 15, 16, 17:

The surgical operation of the hollow short implant is simple and feasible under the guidance of the surgical guide plate 48. The distance from the alveolar ridge to the maxillary sinus and mandibular canal, the width of the alveolar ridge, bone density, and the design of implant placement can be understood through imaging diagnosis before operation. The other function of the surgical guide is to ensure the integrity of the hollow part of the bone column in the implant and the integrity of the bone column and the bone column base to ensure the osseointegration of the implant inside and outside. . The operation is carried out through the guide plate positioning hole 49 with the supporting surgical instruments, and the steps are as follows:

1. Use the gingival circumcision drill 41 to circumcise the gingiva 9, and perform non-invasive surgery without incision or flap flap.

2. Use the matching shoulder drill 42 to prepare the shoulder of the implant on the alveolar bone.

3. Prepare the implant insertion path 46 with the matching barrel drill 47 .

4. The implant connector 44 is slowly screwed into the short hollow implant in place 46 .

5. Wear the healing cap 45 to shape the gingiva around the implant.

Claims (10)

1. A one-piece hollow short implant for oral dental implants has an implant portion (10) and an abutment portion (20), characterized in that: the implant portion (10) and the abutment portion (20) are integrally structured; The top of the abutment part (20) is an inverted conical circular platform (25); the lower part is a positive curved circular platform (24); there is a bevel (28) between the inverted conical circular platform (25) and the positive curved circular platform (24); Above the part (10) and the positive curve round platform (24) junction is a shoulder part (11), the middle part is a main body part (12), and the bottom is a cone part (13); the main body part (12) and the cone part (13 ) inside is a hollow part (18). 2. An oral cavity implant two-stage hollow short implant has an implant portion (10) and an abutment portion (20), and is characterized in that: the implant portion (10) and the abutment portion (20) are hollow short The lower section of the implant, the bridge ring (31) is the upper section of the hollow short implant, and the upper and lower sections are connected into one body through the fixing bolt (35) and the internal threaded hole (30) of the abutment part (20); the bridge ring ( 31) There is an inverted cone hole (33) and an inner hole (34) that can be matched with the inverted cone (25), and there is a hexagonal groove (38) at the upper end of the fixing bolt (35); the top of the abutment (20) It is an inverted conical frustum (25); the lower part is a positive curved frustum (24); there is a bevel (28) between the inverted conical frustum (25) and the positive curved frustum (24); The junction of the circular platform (24) is the shoulder portion (11), the middle portion is the main body portion (12), and the lower portion is the cone portion (13); the inside of the main body portion (12) and the cone portion (13) is a hollow portion (18) . 3. According to claim 1 or 2, characterized in that: the depth of the hollow short implant implanted in the bone tissue (6) and cortical bone (7) is more than 2 mm from the upper wall of the mandibular canal (5). 4. The one-stage hollow short implant or the two-stage hollow short implant according to claim 1, 3 or 2, 3, characterized in that: the implant part (10), its shoulder part (11 ) has a fine thread (14) on its periphery, and its main body (12) and cone (13) have a double thread (15) on its periphery; There is a groove (27) and a cut surface (43) of its symmetrical plane; the positive curve circular platform (24) and the implant shoulder platform (22) form a platform conversion form (8). 5. The one-stage hollow short implant or the two-stage hollow short implant according to claim 1, 3 or 2, 3, characterized in that: there are 1 to 3 self-tapping holes under the implant part (10). Groove (16). 6. The one-stage hollow short implant or the two-stage hollow short implant according to claim 1, 3 or 2, 3, characterized in that: the inside of the mounting ring (31) is a hollow inner hole (34) and Inverted cone (33); the inner hole (34) can penetrate (37); the inverted cone (33) is fitted with the inverted cone (25) of the abutment, and the lower mouth (36) The bevel (32) at the bottom end coincides with the bevel (28) at the abutment portion. 7. The one-stage hollow short implant or the two-stage hollow short implant according to claim 1, 3 or 2, 3, characterized in that: the implant part 10, its shoulder part (11), The length ratio of the three sections of the main body (12) and the vertebral body (13) is about 0.8-1.2:4-6:0.8-1.2. 8. The one-stage hollow short implant or the two-stage hollow short implant according to claim 1, 3 or 2, 3, characterized in that: the parameters of the peripheral fine thread (14) of the shoulder portion (11) It is: pitch 0.23-0.27mm, tooth height 0.06mm-0.10mm; the outer peripheral thread double thread (15) of the main body (12) is zigzag, wherein the large thread parameters pitch is 0.8mm-1.2mm, tooth height 0.4 mm～0.6mm, working side β=34°～38°, non-working side β=2°～6°, tooth profile angle α is 35°～45°, small thread tooth height 0.17mm～0.21mm. 9. The one-stage hollow short implant or the two-stage hollow short implant according to claim 1, 3 or 2, 3, characterized in that: the outer peripheral diameter of the implant part (10) is 5-7 mm, and the hollow part (18) The diameter is 3 mm to 5 mm, and the length of the implant part (10) is 5 mm to 7 mm. 10. The one-stage hollow short implant or the two-stage hollow short implant according to claim 1, 3 or 2, 3, characterized in that: the bevel (32) at the bottom end and the bevel (28) at the abutment The bevel is 45°.

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