Limit maxillary sinus lifting set

Abstract

The utility model relates to the field of oral implant medicine, and particularly discloses an extreme maxillary sinus lifting set which comprises a first drill bit used for forming a cavity in the wall of a maxillary sinus, and the distance between the hole bottom of the cavity and the bone mass of the sinus bottom is 0.5-1 mm; the second drill bit is used for expanding the diameter of the cavity and pushing the soft medical filler placed in the cavity into the sinus floor; the third drill bit is used for continuously expanding the diameter of the hole expanded by the second drill bit and continuously pushing the soft medical filler into the sinus floor; the fourth drill bit is used for continuously expanding the diameter of the hole expanded by the third drill bit and continuously pushing the soft medical filler into the sinus floor; and the fifth drill bit is used for continuously expanding the diameter of the hole expanded by the fourth drill bit and pushing a bone graft material into the sinus floor. According to the device, the cavity is gradually expanded through the five drill bits, and the soft medical filler is pushed into the sinus floor while the cavity is expanded, so that the mucosa of the sinus floor is lifted upwards, and the operation difficulty can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of oral implant medicine, and in particular to an extreme maxillary sinus lift kit. Background Art

[0002] With the maturity of denture implant technology, implant restoration has become the preferred method for restoring missing teeth. When implanting dentures, it is necessary to make a hole in the alveolar bone of the edentulous area, implant the implant into the alveolar bone, and then fix the abutment and crown on the implant in turn. Therefore, the amount of bone in the edentulous area is an important factor affecting the success of implantation.

[0003] In the maxillary posterior teeth area, the bone volume in the edentulous area is insufficient due to factors such as alveolar ridge resorption and reconstruction after edentulousness, age-related changes in the jaw bone, and pneumatization of the maxillary sinus. There are currently two clinical solutions: internal maxillary sinus floor lift via the crestal approach and external maxillary sinus floor lift via lateral wall fenestration. The external maxillary sinus floor lift via lateral wall fenestration is a procedure that involves opening a window in the lateral wall of the maxillary sinus, peeling off the maxillary sinus floor mucosa and pushing it upward and inward, and then implanting or not implanting bone graft material between the mucosa and the sinus floor. In the maxillary sinus lift, the distance from the alveolar ridge to the maxillary sinus floor is determined during the implantation process through precise imaging examinations, and special instruments are used to separate the maxillary sinus floor mucosa from the sinus floor bone, and then implanting bone graft material to lift the sinus floor. The maxillary sinus lift is more easily accepted by patients in clinical practice due to its less trauma, less postoperative pain, and low cost.

[0004] During the traditional maxillary sinus lift surgery, the doctor will make an incision at the top of the alveolar ridge, turn up the mucoperiosteal flap, expose the top of the alveolar ridge, and then use the maxillary sinus bone punch method, which is to use a bone punch with a groove on the top to gently tap, causing a greenstick fracture of the maxillary sinus floor, and then peel off and lift the sinus floor mucosa.

[0005] Traditional maxillary sinus lift has certain technical sensitivity. There is a risk of maxillary sinus floor perforation when operating under blind vision. Once the maxillary sinus is perforated, it needs to be repaired by maxillary sinus lateral wall fenestration, which will increase the difficulty of the operation and postoperative reaction. In addition, during the operation of the maxillary sinus bone block top method, there is a risk of inducing benign paroxysmal positional vertigo (otolithiasis) due to the percussion, which causes great discomfort to the patient. Therefore, in view of the above situation, this application provides an extreme maxillary sinus lift kit. Summary of the invention

[0006] In order to reduce the surgical risks of sinus lift surgery, the present application provides an extreme maxillary sinus lift kit, which has the effect of simple and convenient operation.

[0007] The present application provides an extreme maxillary sinus lift kit that adopts the following technical solutions:

[0008] An extreme sinus lift kit, including:

[0009] The first drill bit is used to open a cavity on the maxillary sinus wall, with the bottom of the cavity being 0.5-1mm away from the sinus floor bone;

[0010] The second drill bit is used to expand the diameter of the cavity and simultaneously push the soft medical filling material placed in the cavity into the sinus floor;

[0011] A third drill bit is used to further expand the diameter of the cavity enlarged by the second drill bit, and to continue to push the soft medical filler into the sinus floor;

[0012] A fourth drill bit is used to further expand the diameter of the cavity enlarged by the third drill bit, and to continue to push the soft medical filler into the sinus floor;

[0013] The fifth drill bit continues to expand the diameter of the cavity enlarged by the fourth drill bit and pushes the bone transplant material into the sinus floor.

[0014] By adopting the above technical solution, a first drill bit, a second drill bit, a third drill bit, a fourth drill bit and a fifth drill bit are set. During the operation, in the first step, a cavity is firstly made on the wall of the maxillary sinus with the first drill bit, and the depth of the cavity needs to be reserved for 0.5-1mm penetration; in the second step, a soft medical filler is placed in the cavity, and then the cavity is enlarged with the second drill bit. During the enlargement process, the second drill bit will push the soft medical filler into the maxillary sinus, so that the soft medical filler breaks through the reserved bone mass and enters the sinus floor. The soft medical filler can protect the second drill bit and prevent the second drill bit from breaking the sinus floor mucosa; in the third step, the soft medical filler is continued to be placed in the cavity, and the third drill bit is used to continue to push the soft medical filler into the sinus floor. The sinus floor mucosa is lifted upward and the cavity is enlarged at the same time; the fourth step is to continue to put soft medical fillers into the cavity, and continue to push the soft medical fillers into the sinus floor with the fourth drill bit, continue to lift the sinus floor mucosa upward and enlarge the cavity at the same time; the fifth step is to fill the cavity with bone graft materials, and push the bone graft materials into the sinus floor with the fifth drill bit to fill the space after the sinus floor mucosa is lifted, and at the same time expand the cavity to the size required by the implant to facilitate the installation of the implant; the overall structure is simple and easy to operate, which is friendly to the surgeon's skills and can effectively reduce the chance of perforation of the sinus floor mucosa; even if small perforations that are difficult to find occur, the soft medical fillers can quickly fill the gaps to prevent further rupture of the sinus floor mucosa.

[0015] Optionally, the second drill bit, the third drill bit, the fourth drill bit and the fifth drill bit are all configured as conical structures that gradually decrease in size near the head, and the heads of the third drill bit, the fourth drill bit and the fifth drill bit are configured as spherical ends.

[0016] By adopting the above technical solution, the second drill bit, the third drill bit, the fourth drill bit and the fifth drill bit are set as conical drill bits, which facilitates the forming of conical holes required for installing implants; the heads of the third drill bit, the fourth drill bit and the fifth drill bit are set as spherical ends, which facilitates the pushing of soft medical fillers and bone transplant materials into the sinus floor.

[0017] Optionally, a stop ring is further included to limit the drilling depth of the first drill bit, the second drill bit, the third drill bit, the fourth drill bit and the fifth drill bit, and the stop ring is provided with a plurality of different length specifications.

[0018] By adopting the above technical solution and setting a plurality of stop rings of different specifications, during the operation, a suitable stop ring can be selected to control the drilling depth of the drill bit, thereby effectively preventing the drill bit from drilling through the sinus floor mucosa.

[0019] Optionally, a limiting column is coaxially fixed in the middle of the first drill bit, the second drill bit, the third drill bit, the fourth drill bit and the fifth drill bit, and a slot is coaxially opened on the outer wall of the limiting column; a locking protrusion is fixed on the inner wall at one end of the stop ring, and the locking protrusion is engaged in the slot.

[0020] By adopting the above technical solution, a slot is opened on the limit column, and a locking protrusion is provided on the stop ring. When in use, the stop ring is connected to the slot through the locking protrusion, which facilitates the installation and removal of the stop ring.

[0021] Optionally, it also includes a universal bone meal conveying head and a universal bone meal conveyor, wherein the universal bone meal conveying head is a bucket-shaped structure that is larger at the top and smaller at the bottom, and the universal bone meal conveying head and the universal bone meal conveyor are universally connected via a ball joint.

[0022] By adopting the above technical solution, a universal bone powder delivery head and a universal bone powder conveyor are set. When filling the bone transplant material into the sinus floor, the universal bone powder delivery head is connected to the universal bone powder conveyor and adjusted to a suitable angle. Then, the bone transplant material is placed in the universal bone powder delivery head. Then, the universal bone powder delivery head is extended to the cavity and the bone transplant material is filled into the cavity for easy use.

[0023] Optionally, a ball head is fixed to the large end of the universal bone meal conveying head; the universal bone meal conveyor includes a handle and a push rod, one end of the handle is provided with a universal groove for inserting the ball head, and the end of the handle away from the universal groove is coaxially provided with a connecting hole connected to the universal groove, the push rod is inserted into the connecting hole and threadedly connected to the hole wall of the connecting hole, and the end of the push rod abuts the ball head.

[0024] By adopting the above technical solution, a universal groove is opened on the handle. When in use, the ball head of the universal bone powder delivery head is inserted into the universal groove, and then the push rod is screwed into the connecting hole. After adjusting the angle of the universal bone powder delivery head, the push rod is tightened to fix the universal bone powder delivery head. The structure is simple, convenient and practical.

[0025] Optionally, the end of the handle close to the universal groove is configured as a thin end with a reduced diameter, the connecting hole is configured as a blind hole opened to the end of the thin end away from the universal groove, and a top hole connecting the universal groove and the connecting hole is coaxially opened in the thin end; the universal bone meal conveyor also includes a push rod and an elastic member, the push rod is slidably inserted into the top hole, and the elastic member is sleeved on the outside of the push rod; a limiting ring convex is coaxially fixed to the end of the push rod away from the universal groove, and two ends of the elastic member respectively abut against the limiting ring convex and the bottom of the connecting hole; the push rod abuts against one end of the push rod close to the limiting ring convex.

[0026] By adopting the above technical solution, a thin end is set at one end of the handle close to the universal groove, which can reduce the space occupied by the handle in the oral cavity and facilitate surgery; a push rod and an elastic member are set, and since the diameter of the thin end is smaller, the connecting hole cannot be directly opened to the thin end, so a top hole is opened at the thin end, and the push rod is inserted into the top hole, so that the universal bone powder delivery head can be fixed by pressing against the ball head; when the universal bone powder delivery head needs to be disassembled, the push rod is loosened, and the elastic member will push the push rod outward, thereby facilitating the disassembly of the universal bone powder delivery head.

[0027] Optionally, a dental conveyor is also included, wherein two ends of the dental conveyor are respectively provided with a left pushing head and a right pushing head for pushing the bone powder in the universal bone powder conveying head into the cavity, and the diameters of the left pushing head and the right pushing head are different.

[0028] By adopting the above technical solution and setting up a dental conveyor, when in use, the bone transplant material in the universal bone powder conveying head can be pushed into the cavity through the left pushing head or the right pushing head, which is convenient for operation.

[0029] Optionally, a side wall of the universal bone meal delivery head is provided with an escape opening for facilitating the entry of the left push head and the right push head.

[0030] By adopting the above technical solution, an avoidance opening is provided on the universal bone powder delivery head, so that the left push head or the right push head can enter the universal bone powder delivery head to push the bone transplant material into the cavity.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. By setting a first drill bit, a second drill bit, a third drill bit, a fourth drill bit and a fifth drill bit, during the operation, in the first step, a cavity is firstly made on the wall of the maxillary sinus with the first drill bit, and the depth of the cavity needs to be reserved for 0.5-1mm penetration; in the second step, a soft medical filler is placed in the cavity, and then the cavity is expanded with the second drill bit. During the expansion process, the second drill bit will push the soft medical filler into the maxillary sinus, so that the soft medical filler breaks through the reserved bone mass and enters the sinus floor; the soft medical filler can protect the second drill bit and prevent the second drill bit from breaking the sinus floor mucosa; in the third step, the soft medical filler is continued to be placed in the cavity, and the third drill bit is used to continue to push the soft medical filler into the sinus floor to stick the sinus floor to the bone. The membrane is lifted upward, and the cavity is enlarged at the same time. In the fourth step, soft medical fillers are continuously placed in the cavity, and the fourth drill bit is used to continue to push the soft medical fillers into the sinus floor, and the sinus floor mucosa is continuously lifted upward, and the cavity is enlarged at the same time. In the fifth step, bone graft materials are filled in the cavity, and the bone graft materials are pushed into the sinus floor through the fifth drill bit to fill the space after the sinus floor mucosa is lifted, and the cavity is enlarged to the size required by the implant, so as to facilitate the installation of the implant. The overall structure is simple and easy to operate, which is more friendly to the surgeon's skills, and can effectively reduce the probability of perforation of the sinus floor mucosa. Even if small perforations that are difficult to find occur, the soft medical fillers can quickly fill the position to prevent further rupture of the sinus floor mucosa.

[0033] 2. By setting the second drill bit, the third drill bit, the fourth drill bit and the fifth drill bit as conical drill bits, it is convenient to form a conical hole required for installing the implant, and setting the heads of the third drill bit, the fourth drill bit and the fifth drill bit as spherical ends, it is convenient to push the soft medical filler and bone transplant material into the sinus floor;

[0034] 3. By setting a universal bone powder delivery head and a universal bone powder conveyor, when filling the bone graft material into the sinus floor, the universal bone powder delivery head is connected to the universal bone powder conveyor and adjusted to a suitable angle, and then the bone graft material is placed in the universal bone powder delivery head, and then the universal bone powder delivery head is extended to the cavity to fill the bone graft material into the cavity, which is convenient for use;

[0035] 4. By opening a universal slot on the handle, when in use, insert the ball head of the universal bone powder delivery head into the universal slot, and then screw the push rod into the connecting hole, and tighten the push rod after adjusting the angle of the universal bone powder delivery head to fix the universal bone powder delivery head. The structure is simple, convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0037] Figure 2 It is a schematic diagram of the first and second steps of the surgical process;

[0038] Figure 3 It is a schematic diagram of the third and fourth steps of the surgical process;

[0039] Figure 4 It is a schematic diagram of the fifth step of the surgical procedure;

[0040] Figure 5 It is a structural schematic diagram of a universal bone meal conveyor;

[0041] Figure 6 It is a structural schematic diagram highlighting the universal slot;

[0042] Figure 7 It is a structural schematic diagram of a universal bone powder delivery head;

[0043] Figure 8 It is a schematic diagram of the structure of a dental conveyor.

[0044] Figure numerals: 01, maxillary sinus wall; 02, cavity; 03, soft medical filler; 04, bone graft material; 05, sinus floor mucosa; 1, first drill bit; 11, limiting column; 12, slot; 2, second drill bit; 3, third drill bit; 31, spherical end; 4, fourth drill bit; 5, fifth drill bit; 6, stop ring; 61, cam; 62, elastic groove; 7, universal bone powder delivery head; 71, ball head; 72, avoidance; 8, universal bone powder delivery device; 81, handle; 811, thin end; 812, universal slot; 813, connecting hole; 814, top hole; 82, push rod; 821, limiting ring cam; 83, elastic member; 84, push rod; 9, dental delivery device; 91, left push head; 92, right push head. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-7 This application is described in further detail.

[0046] The present application embodiment discloses an extreme maxillary sinus lift kit, referring to Figure 1 , including a first drill bit 1, a second drill bit 2, a third drill bit 3, a fourth drill bit 4, a fifth drill bit 5 and a stop ring 6. The sizes of the first drill bit 1, the second drill bit 2, the third drill bit 3, the fourth drill bit 4 and the fifth drill bit 5 increase step by step; the stop ring 6 is provided with a plurality of models of different lengths, and the stop ring 6 can be detachably fixed to the outside of the drill bit. When in use, the stop ring 6 is installed to the outside of the drill bit to limit the drilling depth of the drill bit.

[0047] A limiting column 11 is coaxially and integrally arranged in the middle of the first drill bit 1, the second drill bit 2, the third drill bit 3, the fourth drill bit 4, and the fifth drill bit 5, and an annular clamping groove 12 is coaxially opened on the outer side of the limiting column 11. The stop ring 6 is a cylindrical sleeve structure, and an annular clamping protrusion 61 is coaxially and integrally formed on the inner side wall of one end of the stop ring 6; an elastic groove 62 is opened at one end of the stop ring 6 close to the clamping protrusion 61, and the elastic groove 62 is opened parallel to the axial direction of the stop ring 6. The elastic groove 62 is distributed in multiple ways along the circumferential direction of the stop ring 6, so that the end of the stop ring 6 close to the clamping protrusion 61 has a certain elastic performance.

[0048] When in use, according to the bone thickness of the maxillary sinus wall 01, select a suitable stop ring 6 and install it on the drill bit, and insert the protrusion 61 of the stop ring 6 into the groove 12 of the drill bit to complete the connection. The stop ring 6 can limit the drilling depth of the drill bit and prevent the drill bit from drilling through the sinus floor mucosa 05.

[0049] The second drill bit 2, the third drill bit 3, the fourth drill bit 4 and the fifth drill bit 5 are tapered drill bits that gradually decrease near the head, and the heads of the third drill bit 3, the fourth drill bit 4 and the fifth drill bit 5 are set as spherical ends 31. The first drill bit 1 is a twist drill with a diameter of 1.8 mm, the diameter of the second drill bit 2 gradually increases from 1.8 mm to 2.5 mm, the diameter of the third drill bit 3 gradually increases from 2.5 mm to 3.0 mm, the diameter of the fourth drill bit 4 gradually increases from 3.0 mm to 3.5 mm, and the diameter of the fifth drill bit 5 gradually increases from 3.5 mm to 4.0 mm.

[0050] Reference Figure 2 and Figure 3 During the operation, the first step is to select a stop ring 6 of appropriate length according to the bone volume of the maxillary sinus wall 01 and install it on the first drill bit 1, and then use the first drill bit 1 to open a cavity 02 on the maxillary sinus wall 01. The depth of the cavity 02 needs to be reserved for 0.5-1mm.

[0051] In the second step, a soft medical filler 03 is placed in the cavity 02. The soft medical filler 03 is made of collagen sponge. Then, a suitable stop ring 6 is installed on the second drill bit 2, and the cavity 02 is enlarged with the second drill bit 2. During the enlargement process, the second drill bit 2 will push the soft medical filler 03 into the maxillary sinus, so that the soft medical filler 03 breaks through the reserved bone and enters the sinus floor. The soft medical filler 03 can protect the second drill bit 2 to prevent the second drill bit 2 from breaking the sinus floor mucosa 05. At the same time, the soft medical filler 03 will peel off the sinus floor mucosa 05 and lift it upward.

[0052] The third step is to continue to put the soft medical filler 03 into the cavity 02, install a stop ring 6 of appropriate length on the third drill bit 3, and then use the third drill bit 3 to continue to push the soft medical filler 03 into the sinus floor, lift the sinus floor mucosa 05 upward, and expand the cavity 02 at the same time.

[0053] The fourth step is to continue to put the soft medical filler 03 into the cavity 02, install a suitable stop ring 6 on the fourth drill bit 4, and then use the fourth drill bit 4 to push the soft medical filler 03 into the sinus floor, continue to lift the sinus floor mucosa 05 upward, and expand the cavity 02 at the same time.

[0054] Reference Figure 4 In the fifth step, the bone transplant material 04 is filled in the cavity 02. The bone transplant material 04 is made of bone powder. Then, a suitable stop ring 6 is installed on the fifth drill bit 5. The bone transplant material 04 is pushed into the sinus floor through the fifth drill bit 5 to fill the space after the sinus floor mucosa 05 is lifted, and the cavity 02 is expanded.

[0055] During the operation, the patient can choose to finish at the fourth or fifth step according to the type of implant to be installed. If the cavity 02 can reach the size for installing the implant in the fourth step, the bone transplant material 04 is filled into the sinus floor in the fourth step.

[0056] Reference Figure 5-7 , also includes a universal bone powder conveying head 7 and a universal bone powder conveyor 8. The universal bone powder conveyor 8 is a structure similar to a funnel, and a ball head 71 is fixed to the large end of the universal bone powder conveying head 7. The universal bone powder conveyor 8 includes a handle 81, a push rod 82, an elastic member 83 and a push rod 84. One end of the handle 81 is set as a thin end 811 with a reduced diameter, and a universal groove 812 is provided on the side wall of the thin end 811; a round hole is provided at one end of the universal groove 812 for the ball head 71 to enter, and the universal groove 812 is slidably matched with the rod end of the ball head 71. A connecting hole 813 is coaxially provided at one end of the handle 81 away from the thin end 811, and a top hole 814 connected to the universal groove 812 is provided at the bottom of the hole of the connecting hole 813 of the handle 81, and the top hole 814 is a blind hole, and the top hole 814 is located in the thin end 811. The push rod 82 is slidably inserted into the top hole 814, and the elastic member 83 is set as a compression spring, and the elastic member 83 is sleeved on the outside of the push rod 82; a limit ring protrusion 821 is coaxially and integrally provided at one end of the push rod 82 away from the universal groove 812, and the two ends of the elastic member 83 are respectively abutted against the limit ring protrusion 821 and the bottom of the connecting hole 813. The push rod 84 is slidably inserted into the connecting hole 813 and is threadedly connected to the hole wall of the connecting hole 813.

[0057] The universal bone powder delivery head 7 can be provided with a plurality of different models to facilitate adaptation to the size of the cavity 02 .

[0058] When in use, the ball head 71 of the universal bone powder delivery head 7 is inserted into the universal groove 812, and the angle of the universal bone powder delivery head 7 is adjusted; then the push rod 84 is rotated to move toward one end of the universal groove 812, and the push rod 84 drives the push rod 82 to press against the ball head 71 to fix the universal bone powder delivery head 7, and then the bone transplant material 04 can be loaded into the universal bone powder delivery head 7, and then the universal bone powder delivery device 8 is extended into the oral cavity to fill the bone transplant material 04 into the cavity 02. When disassembly is required, the push rod 84 is rotated away from the thin end 811, and the elastic member 83 pushes the push rod 82 back, so that the push rod 82 releases the ball head 71, and the ball head 71 can be taken out from the universal groove 812.

[0059] Reference Figure 7 and Figure 8 The present application also includes a dental delivery device 9, and the two ends of the dental delivery device 9 are respectively integrally formed with a left push head 91 and a right push head 92, and the diameters of the left push head 91 and the right push head 92 are different, which are just adapted to the sizes of different models of universal bone powder delivery heads 7. An avoidance hole 72 is provided on the side wall of the universal bone powder delivery head 7, and when in use, the left push head 91 or the right push head 92 is conveniently extended from the avoidance hole into the universal bone powder delivery head 7 to push the bone transplant material 04 into the cavity 02.

[0060] The implementation principle of an extreme maxillary sinus lifting kit disclosed in an embodiment of the present application is as follows: by setting a plurality of drill bits of different models and setting stop rings 6 of various lengths, during the operation, according to the bone thickness of the patient's maxillary sinus wall 01, a suitable stop ring 6 is selected and installed on the drill bit, and a cavity 02 is opened in the maxillary sinus wall 01, which can prevent the drill bit from directly penetrating the sinus floor mucosa 05; and while the plurality of drill bits gradually enlarge the cavity 02, a soft medical filler 03 is pushed into the sinus floor, thereby gradually lifting the sinus floor mucosa 05 upward, which can effectively reduce the difficulty of the operation and improve the success rate of the operation.

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An extreme maxillary sinus lift kit, characterized in that: include: A first drill bit (1) is used to open a cavity (02) on the maxillary sinus wall (01), wherein the bottom of the cavity (02) is 0.5-1 mm away from the sinus floor bone; A second drill bit (2) is used to enlarge the diameter of the cavity (02) and simultaneously push the soft medical filler (03) placed in the cavity (02) into the sinus floor; A third drill bit (3) is used to further expand the diameter of the cavity (02) enlarged by the second drill bit (2), and to further push the soft medical filler (03) into the sinus floor; The fourth drill bit (4) continues to expand the diameter of the cavity (02) enlarged by the third drill bit (3), and continues to push the soft medical filler (03) into the sinus floor; The fifth drill bit (5) continues to expand the diameter of the cavity (02) enlarged by the fourth drill bit (4) and pushes the bone transplant material (04) into the sinus floor.

2. The extreme maxillary sinus lift kit according to claim 1, characterized in that: The second drill bit (2), the third drill bit (3), the fourth drill bit (4) and the fifth drill bit (5) are all configured as conical structures that gradually decrease in size near the head, and the heads of the third drill bit (3), the fourth drill bit (4) and the fifth drill bit (5) are configured as spherical ends (31).

3. The extreme maxillary sinus lift kit according to claim 1, characterized in that: It also includes a stop ring (6) for limiting the drilling depth of the first drill bit (1), the second drill bit (2), the third drill bit (3), the fourth drill bit (4) and the fifth drill bit (5), and the stop ring (6) is provided with a plurality of different length specifications.

4. The extreme maxillary sinus lift kit according to claim 3, characterized in that: A limiting column (11) is coaxially fixed in the middle of the first drill bit (1), the second drill bit (2), the third drill bit (3), the fourth drill bit (4) and the fifth drill bit (5), and a clamping groove (12) is coaxially provided on the outer wall of the limiting column (11); a clamping protrusion (61) is fixed on the inner wall of one end of the stop ring (6), and the clamping protrusion (61) is clamped in the clamping groove (12).

5. The extreme maxillary sinus lift kit according to claim 1, characterized in that: It also comprises a universal bone powder conveying head (7) and a universal bone powder conveyor (8); the universal bone powder conveying head (7) is a bucket-shaped structure that is larger at the top and smaller at the bottom; the universal bone powder conveying head (7) and the universal bone powder conveyor (8) are universally connected via a ball joint.

6. The extreme maxillary sinus lift kit according to claim 5, characterized in that: A ball head (71) is fixed to the large end of the universal bone powder conveying head (7); the universal bone powder conveying device (8) comprises a handle (81) and a push rod (84); one end of the handle (81) is provided with a universal groove (812) for inserting the ball head (71); one end of the handle (81) away from the universal groove (812) is coaxially provided with a connecting hole (813) connected to the universal groove (812); the push rod (84) is inserted into the connecting hole (813) and is threadedly connected to the hole wall of the connecting hole (813); and the end of the push rod (84) abuts against the ball head (71).

7. The extreme maxillary sinus lift kit according to claim 6, characterized in that: The end of the handle (81) close to the universal groove (812) is configured as a thin end (811) with a reduced diameter, the connecting hole (813) is configured as a blind hole opened to the end of the thin end (811) away from the universal groove (812), and a top hole (814) connecting the universal groove (812) and the connecting hole (813) is coaxially opened in the thin end (811); the universal bone powder conveyor (8) also includes a push rod (82) and an elastic member (83), the The push rod (82) is slidably inserted into the top hole (814), and the elastic member (83) is sleeved on the outside of the push rod (82); one end of the push rod (82) away from the universal groove (812) is coaxially fixed with a limiting ring protrusion (821), and the two ends of the elastic member (83) are respectively abutted against the limiting ring protrusion (821) and the bottom of the connecting hole (813); the push rod (84) is abutted against one end of the push rod (82) close to the limiting ring protrusion (821).

8. The extreme maxillary sinus lift kit according to claim 5, characterized in that: It also comprises a dental conveyor (9), wherein two ends of the dental conveyor (9) are respectively provided with a left push head (91) and a right push head (92) for pushing the bone powder in the universal bone powder conveying head (7) into the cavity (02), and the left push head (91) and the right push head (92) have different diameters.

9. The extreme maxillary sinus lift kit according to claim 8, characterized in that: The side wall of the universal bone powder delivery head (7) is provided with an escape opening (72) for facilitating the entry of the left push head (91) and the right push head (92).

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