Implant screw loosening detection device, implant screw pre-tightening device, and use methods therefor

Abstract

An implant screw loosening detection device and a use method therefor, and an implant screw pre-tightening device and a use method therefor. During detection, a first motor (220) drives a first outer magnet (240) and a slider (252) of a sliding resistor (250) to rotate; a curve of the corresponding relationship between the rotation angle of the first outer magnet (240) and a current is established; when second protrusions (121) of an inner magnet (130) abut against first protrusions (111) of a connector (110), the rotation of the inner magnet (130) and the rotation of the first outer magnet (240) are not synchronous, and thus the magnetic force of the inner magnet (130) hinders the rotation of the first outer magnet (240) and the first motor (220), causing an unsmooth inflection point to appear in the relationship curve; and after an implant is used for a period of time, a detection assembly (200) is used for carrying out the described operation to obtain another inflection point, and if the rotation angles corresponding to the two inflection points are inconsistent, it is proved that an implant screw (12) is loose. During pre-tightening, a pre-tightening assembly (300) is placed above a built-in assembly (100) and the implant, and no drilling is required on a prosthesis, thereby avoiding damage to the prosthesis or an abutment.

Description

Implant screw loosening detection device, pre-tightening device and use method thereof Technical Field

[0001] The present invention relates to the technical field of dental implantation, and in particular to an implant screw loosening detection device, a pre-tightening device and a use method thereof. Background Art

[0002] Loosening of implant screws is one of the most common mechanical complications in implant restorations. It can cause micro-movements between components such as the restoration, abutment, and implant, leading to abnormalities in the generation, transmission, and distribution of torque, ultimately causing component breakage or implant system failure. Furthermore, small gaps between components can lead to plaque deposition, soft tissue ingrowth, and fistula formation. Therefore, loose implant screws require re-tightening.

[0003] Currently, most implants are retained by bonding, and the restoration is connected to the abutment by bonding. After the implant restoration is completed, the screw holes on the restoration are closed. Therefore, the problem of loose connecting screws is difficult to deal with. It is necessary to combine X-ray examination and photos of the abutment in place before wearing the teeth to determine the exact position of the drill hole, open a channel on the restoration, and then use the original screwdriver to re-torque it. Finally, the drill channel on the restoration is repaired. If the restoration is severely damaged or affects the aesthetics, the restoration needs to be remade.

[0004] Therefore, the repair operation of implant screw loosening is complicated and costly, and there is an urgent need for a method or device for detecting and pre-tightening loosening of implant connection screws that is simple to operate and has low repair cost.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to provide an implant screw loosening detection device, a pre-tightening device and a method of using the same, so as to solve one or more technical problems existing in the prior art and at least provide a beneficial option or create conditions.

[0007] The technical solutions adopted to solve the above technical problems are:

[0008] An implant screw loosening detection device, comprising:

[0009] The built-in component is arranged inside the implant abutment, and the built-in component includes:

[0010] A connector, the bottom of which is used to connect to the implant screw, and the top of the connector is provided with a first protrusion;

[0011] a rotating member rotatably disposed on the top of the joint, a second protrusion being disposed on the bottom of the rotating member, and the first protrusion being located on a rotation track of the second protrusion;

[0012] an inner magnet, which is provided on the rotating member, wherein two magnetic poles of the inner magnet are horizontally arranged side by side;

[0013] A detection component comprising:

[0014] a first shell;

[0015] a first motor, which is disposed in the first housing;

[0016] a current measuring circuit, which is provided in the first housing;

[0017] a first external magnet connected to the first motor, wherein two magnetic poles of the first external magnet are horizontally arranged side by side, and the first motor drives the first external magnet to rotate around a vertical axis;

[0018] A sliding resistor is provided with a resistor and a slider, wherein the resistor is bent into a circular shape, the head and tail ends of the resistor are separated from each other, the head end of the resistor and the slider are electrically connected to the current measurement circuit, and the slider is connected to the first motor, and the first motor drives the slider to slide along the resistor.

[0019] The beneficial effects of the present invention are as follows: the built-in component is arranged inside the patient's implant base, the connector is connected to the implant screw, the detection component is placed above the built-in component and the implant, and then the first motor is started through the detection component, the first motor drives the first external magnet and the slider to rotate, and the slider changes the resistance of the sliding resistor after rotation, and the current measurement circuit measures the current, so that the rotation angle of the first external magnet and the current establish a one-to-one correspondence and generate a relationship curve, because the second protrusion of the rotating part and the first protrusion of the connector offset, so that the rotation of the internal magnet and the first external magnet is not synchronized, the magnetic force of the internal magnet hinders the rotation of the first external magnet and the first motor, and thus a non-smooth inflection point appears in the relationship curve; after the patient uses the implant for a period of time, the detection component is used to perform the above operation to obtain another inflection point. If the rotation angles corresponding to the two inflection points are inconsistent, it proves that the implant screw is loose.

[0020] As a further improvement of the above technical solution, the detection component further includes a sound sensor, and the sound sensor is electrically connected to the current measurement circuit.

[0021] As a further improvement of the above technical solution, a first baffle is provided at the bottom of the first shell, and the first baffle is located directly below the first external magnet.

[0022] As a further improvement of the above technical solution, a plurality of clamping plates are provided at the bottom of the first shell, the plurality of clamping plates are spaced apart along the rotational circumference of the first external magnet, and the plurality of clamping plates are arranged around the periphery of the first baffle.

[0023] A method for using an implant screw loosening detection device includes the implant screw loosening detection device as described above, and further includes the following steps:

[0024] S11, the first motor drives the slider to rotate, records the current measured by the current measurement circuit at each rotation angle, and establishes a corresponding relationship between the rotation angle of the first motor and the current;

[0025] S12, starting the first motor to rotate the slider at a constant speed, generating a curve showing current variation over time as a theoretical curve;

[0026] S13, placing the built-in component inside the implant abutment;

[0027] S14, the detection component is brought close to the built-in component, the first motor is started, and a curve showing current change over time is generated as a measured curve;

[0028] S15, when the first bump prevents the second bump from rotating, an inflection point appears on the measured curve;

[0029] S16, recording the current corresponding to the inflection point, and finding the corresponding rotation angle as the rotation angle of the implant screw according to the corresponding relationship between the rotation angle and the current;

[0030] S17. After a period of time, repeat S14 to S16, and the difference between the two rotation angles is the loosening angle of the implant screw.

[0031] The first external magnet and the slider have the same rotation angle. The current measured by the current measurement circuit is associated with the rotation angle of the first external magnet. The curve of the current change with time obtained by the uniform rotation of the first motor is a theoretical curve. Each current in the theoretical curve corresponds to a rotation angle. Subsequently, a measured curve is generated after the patient implants the implant. The time of the inflection point in the measured curve is the moment when the first bump and the second bump offset each other to hinder the rotation of the internal magnet. The rotation angle corresponding to the current at the inflection point is the rotation angle of the implant screw. After the patient uses the implant for a period of time, the above measurement is performed again to obtain another rotation angle of the implant screw. If the two rotation angles are different, the difference between the two rotation angles is the loosening angle of the implant screw. This method can find the accurate value of the loosening angle of the implant screw, so as to determine whether the implant screw needs to be re-tightened.

[0032] As a further improvement of the above technical solution, the implant screw loosening detection device also includes a controller, which stores the theoretical curve and the measured curve, records the rotation angles corresponding to the two inflection points, and outputs the loosening angle.

[0033] An implant screw pre-tightening device, comprising:

[0034] The built-in component is arranged inside the implant abutment, and the built-in component includes:

[0035] A connector, the bottom of which is used to connect to the implant screw, and the top of the connector is provided with a first protrusion;

[0036] a rotating member rotatably disposed on the top of the joint, a second protrusion being disposed on the bottom of the rotating member, and the first protrusion being located on a rotation track of the second protrusion;

[0037] an inner magnet, which is provided on the rotating member, wherein two magnetic poles of the inner magnet are horizontally arranged side by side;

[0038] A preload assembly comprising:

[0039] a second shell;

[0040] a second motor, which is disposed in the second housing;

[0041] a second external magnet connected to the second motor, wherein two magnetic poles of the second external magnet are horizontally arranged side by side;

[0042] The second motor drives the second outer magnet to rotate about a vertical axis.

[0043] The built-in component is set inside the patient's implant base, the connector is connected to the implant screw, and the pre-tightening component is placed above the built-in component and the implant. The second external magnet is driven to rotate by the second motor. The second external magnet attracts the inner magnet and drives the rotating part to rotate until the second protrusion of the rotating part is blocked by the first protrusion of the connector, so that the rotation of the inner magnet is stopped, and the second motor continues to drive the second external magnet to rotate. When the magnetic pole of the second external magnet is opposite to the magnetic pole of the inner magnet, the inner magnet is quickly reversed by the magnetic force, driving the second protrusion to reverse and hit the first protrusion, so that the first protrusion drives the connector and the pre-tightening implant screw, without drilling holes in the restoration, avoiding damage to the restoration or the implant base.

[0044] As a further improvement of the above technical solution, a second baffle is provided at the bottom of the second shell, and the second baffle is located directly below the second external magnet.

[0045] A method for using an implant screw pre-tightening device includes the implant screw pre-tightening device as described above, and further includes the following steps:

[0046] S21. The patient is implanted with an implant, and the built-in component is placed inside the implant base;

[0047] S22, the pre-tightening component approaches the built-in component and starts the second motor;

[0048] S23: The first protrusion prevents the second protrusion from rotating. The second motor continues to drive the second outer magnet to rotate. The magnetic poles of the second outer magnet are opposite to those of the inner magnet, causing the inner magnet to drive the rotating member to reverse, and the second protrusion hits the first protrusion.

[0049] S24. Repeat S22 to S23 until the implant screw is pre-tightened.

[0050] The built-in component is set inside the patient's implant base, the connector is connected to the implant screw, and the pre-tightening component is placed above the built-in component and the implant. The second external magnet is driven to rotate by the second motor. The second external magnet attracts the inner magnet and drives the rotating part to rotate until the second protrusion of the rotating part is blocked by the first protrusion of the connector, so that the rotation of the inner magnet is stopped, and the second motor continues to drive the second external magnet to rotate. When the magnetic pole of the second external magnet is opposite to the magnetic pole of the inner magnet, the inner magnet is quickly reversed by the magnetic force, driving the second protrusion to reverse and hit the first protrusion, so that the first protrusion drives the connector and the pre-tightening implant screw, without drilling holes in the restoration, avoiding damage to the restoration or the implant base.

[0051] As a further improvement of the above technical solution, the rotation direction of the second motor is switched so that the implant screw loses its pre-tightening force. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0053] FIG1 is an exploded schematic diagram of an embodiment of a built-in component provided by the present invention;

[0054] FIG2 is a cross-sectional schematic diagram of an embodiment of a built-in component provided by the present invention;

[0055] FIG3 is a schematic diagram of the operation of an implant screw loosening detection device according to an embodiment of the present invention;

[0056] FIG4 is an exploded schematic diagram of an implant screw loosening detection device provided by the present invention, an embodiment thereof;

[0057] FIG5 is a flowchart of the steps of an embodiment of a method for using the implant screw loosening detection device provided by the present invention;

[0058] FIG6 is a method for using the implant screw loosening detection device provided by the present invention, a schematic diagram of the rotation of the first protrusion and the second protrusion in one embodiment;

[0059] FIG7 is a schematic diagram of a theoretical curve and two measured curves in one embodiment of a method for using the implant screw loosening detection device provided by the present invention;

[0060] FIG8 is an exploded schematic diagram of an embodiment of the implant screw pre-tightening device provided by the present invention;

[0061] 9 is a flowchart of the steps of an embodiment of a method for using the implant screw pre-tightening device provided by the present invention;

[0062] 10 is a method for using the implant screw pretightening device provided by the present invention, wherein in one embodiment, a schematic diagram of the rotation of the first and second protrusions when pretightening the implant screw;

[0063] FIG11 is a method for using the implant screw pre-tightening device provided by the present invention, in which a schematic diagram of the rotation of the first and second protrusions when unscrewing the implant screw in one embodiment is shown.

[0064] 10. Implant, 11. Implant abutment, 12. Implant screw, 13. Prosthesis, 100. Built-in component, 110. Connector, 111. First protrusion, 120. Rotating part, 121. Second protrusion, 130. Internal magnet, 200. Detection component, 210. First shell, 211. First baffle, 212. Clamp, 220. First motor, 230. Current measurement circuit, 240. First external magnet, 250. Sliding resistor, 251. Resistor, 252. Slider, 300. Pre-tightening component, 310. Second shell, 311. Second baffle, 320. Second motor, 330. Second external magnet. DETAILED DESCRIPTION

[0065] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0066] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0067] In the description of the present invention, if there are words such as "several", it means one or more, and "more" means more than two. Greater than, less than, and exceed are understood as not including the number itself, and above, below, and within are understood as including the number itself.

[0068] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0069] 1 and 2 , the implant of the present invention is implemented as follows:

[0070] The implant includes an implant body 10 , an implant base 11 , an implant screw 12 , and a restoration 13 .

[0071] An assembly hole is provided at the top of the implant body 10, and a screw hole extending downward is provided on the bottom wall of the assembly hole. The lower section of the implant base 11 cooperates with the assembly hole, and the upper section of the implant base 11 extends above the implant body 10. The interior of the implant base 11 is provided with an inner cavity that passes through from top to bottom. The implant screw 12 is passed through the inner cavity of the implant base 11. The implant screw 12 cooperates with the screw hole to lock the implant base 11 on the implant body 10. The restoration 13 is sleeved on the upper section of the implant base 11, and the restoration 13 closes the upper end of the inner cavity of the implant base 11.

[0072] 1 and 2 , the built-in component 100 of the present invention is implemented as follows:

[0073] The built-in component 100 includes a joint 110 , a rotating member 120 , an internal magnet 130 , and a closing cover.

[0074] The joint 110 is cylindrical, and a connecting column extending downward is provided at the bottom of the joint 110. The axis of the connecting column coincides with the axis of the joint 110. The shape of the connecting column matches the shape of the thread groove of the head of the implant screw 12. In this embodiment, the thread groove is a regular hexagonal groove, and the connecting column is a regular hexagonal prism. Two first protrusions 111 extending upward are provided at the top of the joint 110, and the two first protrusions 111 are symmetrically distributed on both sides of the axis of the joint 110.

[0075] The rotating member 120 is cylindrical, and a downwardly protruding ball head is provided at the bottom of the rotating member 120. The center of the ball head is located on the axis of the rotating member 120. The ball head extends downward and abuts against the middle of the top of the joint 110. The bottom of the rotating member 120 is also provided with two downwardly extending second protrusions 121. The two second protrusions 121 are symmetrically distributed on both sides of the axis of the rotating member 120. The distance from the second protrusion 121 to the axis of the rotating member 120 is equal to the distance from the first protrusion 111 to the axis of the joint 110, ensuring that the trajectory of the second protrusion 121 driven by the rotating member 120 to rotate passes through the first joint 111.

[0076] An upwardly protruding assembly block is provided on the top of the rotating member 120. The inner magnet 130 is cylindrical. The two magnetic poles of the inner magnet 130 are distributed side by side in the horizontal direction. The two magnetic poles of the inner magnet 130 are symmetrically distributed on both sides of the axis of the inner magnet 130. An assembly groove is provided at the bottom of the inner magnet 130. The shape of the assembly groove matches the shape of the assembly block. The assembly block is inserted into the assembly groove to enable the rotating member 120 to be linked with the inner magnet 130, and the axis of the inner magnet 130 coincides with the axis of the rotating member 120.

[0077] As shown in Figure 2, the implant body 10, the implant base 11, and the implant screw 12 are assembled together, the built-in component 100 is set in the inner cavity of the implant base 11, and the connecting column at the bottom of the connector 110 is inserted into the screw groove of the head of the implant screw 12, so that the connector 110 and the implant screw 12 are linked.

[0078] The outer diameters of the inner magnet 130 and the rotating member 120 are both smaller than the inner diameter of the inner cavity of the implant base 11 , so that the rotating member 120 and the inner magnet 130 can rotate around the vertical axis in the inner cavity of the implant base 11 .

[0079] The closing cover is installed at the top of the inner cavity of the implant base 11. The outer wall of the closing cover is interference fit with the inner wall of the inner cavity of the implant base 11. There is a space between the bottom of the closing cover and the top surface of the internal magnet 130. A downwardly protruding spherical surface is provided in the middle of the bottom of the closing cover, and the center of the spherical surface is located above the axis of the internal magnet 130.

[0080] The restoration 13 is sleeved on the upper section of the implant base 11 . The restoration 13 is connected to the outer wall of the implant base 11 via adhesive, and the restoration 13 seals the top of the inner cavity of the implant base 11 .

[0081] 3 and 4 , the implant screw loosening detection device of the present invention is provided in the following embodiment: the implant screw loosening detection device includes a built-in component 100 and a detection component 200 .

[0082] The structure of the built-in component 100 is consistent with the above solution. The detection component 200 includes a first shell 210 , a first motor 220 , a current measurement circuit 230 , a first external magnet 240 , and a sliding resistor 250 .

[0083] The first motor 220 , the current measurement circuit 230 , the first external magnet 240 , and the sliding resistor 250 are all disposed inside the first housing 210 .

[0084] The output shaft of the first motor 220 extends downward, and the output shaft of the first motor 220 rotates around a vertical axis.

[0085] The two magnetic poles of the first outer magnet 240 are arranged side by side. The output shaft of the first motor 220 is connected to the first outer magnet 240 . The output shaft of the first motor 220 drives the first outer magnet 240 to rotate around a vertical axis.

[0086] The sliding resistor 250 includes a resistor 251 and a slider 252. The resistor 251 is ring-shaped and is cut into two ends. The head end of the resistor 251 is electrically connected to the current measurement circuit 230, and the slider 252 is electrically connected to the current measurement circuit 230. The slider 252 is connected to the output shaft of the first motor 220. The output shaft of the first motor 220 drives the slider 252 to slide along the circumference of the resistor 251.

[0087] The current measurement circuit 230 measures the current.

[0088] The built-in component 100 is set inside the patient's implant base 11, the connector 110 is connected to the implant screw 12, the detection component 200 is placed above the built-in component 100 and the implant, and then the first motor 220 is started through the detection component 200.

[0089] The output shaft of the first motor 220 drives the first external magnet 240 and the slider 252 to rotate. The rotation of the slider 252 changes the resistance of the sliding resistor 250. The current measurement circuit 230 measures the current, establishing a one-to-one correspondence between the rotation angle of the first external magnet 240 and the current, and generating a relationship curve.

[0090] Since the second protrusion 121 of the rotating member 120 abuts against the first protrusion 111 of the connector 110, the rotation of the inner magnet 130 and the first outer magnet 240 are not synchronized. The magnetic force of the inner magnet 130 hinders the rotation of the first outer magnet 240 and the first motor 220, resulting in an uneven inflection point in the relationship curve.

[0091] After the patient has used the implant for a period of time, the patient uses the detection component 200 to perform the above operation again to obtain another inflection point. If the rotation angles corresponding to the two inflection points are inconsistent, it proves that the implant screw 12 is loose.

[0092] In some embodiments, the detection component 200 further includes a sound sensor, which is disposed in the first housing 210 and electrically connected to the current measurement circuit.

[0093] The first motor 220 drives the first outer magnet 240 and the slider 252 to rotate, causing the inner magnet 130 to rotate accordingly. When the second protrusion 121 of the rotating member 120 abuts the first protrusion 111 of the connector 110, the rotation of the inner magnet 130 and the first outer magnet 240 becomes asynchronous. The magnetic force of the inner magnet 130 then hinders the rotation of the first outer magnet 240 and the first motor 220. The first outer magnet 240 continues to rotate, causing the magnetic poles of the inner magnet 130 to be opposite to those of the first outer magnet 240. At this time, the inner magnet 130 remains stationary.

[0094] After the first outer magnet 240 passes the critical point where the inner magnet 130 remains stationary, the inner magnet 130 reverses and drives the rotating member 120 to cause the second protrusion 121 to collide with the first protrusion 111 to produce a sound. After detecting the sound of the collision, the sound sensor sends an electrical signal to the current measurement circuit 230.

[0095] The slider 252 changes the resistance value of the sliding resistor 250 as the first external magnet 240 rotates, so that the current measuring circuit 230 records the measured current after receiving the electrical signal, and finds the corresponding rotation angle according to the relationship curve between the current and the rotation angle, thereby determining the current rotation angle of the implant screw 12.

[0096] In some embodiments, as shown in FIG. 3 , a first baffle 211 is provided at the bottom of the first housing 210 . The first baffle 211 is located directly below the first external magnet 240 .

[0097] When detecting loose implant screws, the first baffle 211 is brought into contact with the top of the restoration 13 to determine the distance between the first shell 210 and the implant, thereby preventing the first shell 210 from driving the first external magnet 240 up and down during the detection process, thereby preventing inaccurate detection.

[0098] In some embodiments, as shown in FIG. 3 and FIG. 4 , a plurality of clamping plates 212 are further provided on the bottom of the first housing 210 , and a plurality of clamping plates 212 are provided on the periphery of the first baffle 211 .

[0099] When detecting loose implant screws, the first baffle 211 is placed against the top of the restoration 13, and the multiple clamps 212 are respectively clamped on the periphery of the restoration 13. The multiple clamps 212 limit the freedom of the first shell 210 to move horizontally, thereby preventing the first shell 210 from driving the first external magnet 240 to move horizontally during the detection process, causing inaccurate detection.

[0100] Specifically, as shown in FIG. 4 , the implant screw loosening detection device includes a built-in component 100 and a detection component 200 .

[0101] The structure of the built-in component 100 is consistent with the above solution. The detection component 200 includes a first shell 210 , a first motor 220 , a current measurement circuit 230 , a first external magnet 240 , and a sliding resistor 250 .

[0102] The first motor 220 , the current measurement circuit 230 , the first external magnet 240 , and the sliding resistor 250 are all disposed inside the first housing 210 .

[0103] The output shaft of the first motor 220 extends in the up-down direction and extends out at the upper and lower sides.

[0104] The first external magnet 240 is cylindrical, and its two magnetic poles are symmetrically distributed on both sides of the axis of the first external magnet 240. The lower end of the output shaft of the first motor 220 is connected to the axis of the first external magnet 240. The output shaft of the first motor 220 drives the first external magnet 240 to rotate around the axis.

[0105] The sliding resistor 250 includes a resistor 251 and a slider 252 . The resistor 251 is disposed on the top surface of the first motor 220 . The resistor 251 is ring-shaped and is divided into two ends.

[0106] The first end of the resistor 251 is electrically connected to the current measurement circuit 230 , and the slider 252 is electrically connected to the current measurement circuit 230 . The slider 252 is connected to the upper end of the output shaft of the first motor 220 . The output shaft of the first motor 220 drives the slider 252 to slide along the circumference of the resistor 251 .

[0107] When the slider 252 slides on the resistor 251 to change the resistance of the sliding resistor 250 , the current measurement circuit 230 measures the change in current.

[0108] A first baffle 211 and two first clamping plates 212 are provided at the bottom of the first housing 210 . The first baffle 211 is located directly below the first external magnet 240 . The two first clamping plates 212 are symmetrically distributed on both sides of the first baffle 211 about the axis of the first external magnet 240 .

[0109] 5 to 7 , the method for using the implant screw loosening detection device of the present invention is described in the following embodiments:

[0110] Using the detection assembly 200 , the slider 252 of the sliding resistor 250 is at the end of the resistor 251 , the first motor 220 is started, the slider 252 rotates once, and each rotation angle is between 0.5° and 1°. The current measurement circuit 230 records the measured current.

[0111] 7 , the current measurement circuit 230 measures the currents corresponding to all rotation angles, each current corresponding to a rotation angle of the first motor 220 , and a corresponding relationship between the rotation angle and the current is established.

[0112] 7 , the slider 252 rotates at a constant speed from the tail end to the head end, and the first motor 220 rotates 360°. The current measuring circuit 230 records the change of the current over time during the rotation process to generate a theoretical curve.

[0113] The patient has an implant implanted, the built-in component 100 is placed in the inner cavity of the patient's implant base 11 , and the restoration 13 is installed on the upper section of the implant base 11 .

[0114] 6 and 7 , the detection component 200 is positioned above the built-in component 100 and the implant, the first motor 220 is started, and the slider 252 rotates at a constant speed from the tail end to the head end of the resistor 251 . The first motor 220 rotates 360°, and the current measurement circuit 230 records the change in current over time during the rotation process to generate a first measured curve.

[0115] Since the joint 110 in the built-in component 100 is linked with the implant screw 12 , the inner magnet 130 is linked with the rotating member 120 , and when the first outer magnet 240 rotates, the first outer magnet 240 attracts the inner magnet 130 to rotate.

[0116] The inner magnet 130 rotates synchronously with the rotating member 120. When the second protrusion 121 is blocked by the first protrusion 111 and the first outer magnet 240 continues to rotate, the magnetic force of the inner magnet 130 hinders the rotation of the first outer magnet 240, thereby hindering the rotation of the first motor 220. The first motor 220 drives the slider 252 to slide unsmoothly, and a first inflection point appears in the first measured curve measured by the current measurement circuit 230.

[0117] The current corresponding to the first inflection point in the first measured curve is recorded, and the rotation angle corresponding to the current at the first inflection point is found based on the corresponding relationship between the rotation angle of the first motor 220 and the current. The rotation angle is the first rotation angle of the implant screw 12 .

[0118] 6 and 7 , after the patient has used the implant for a period of time, the detection component 200 is placed above the built-in component 100 and the implant, and the first motor 220 is started to rotate the slider 252 at a constant speed from the tail end to the head end of the resistor 251. The first motor 220 rotates 360°, and the current measurement circuit 230 records the change of current over time during the rotation process to generate a second measured curve.

[0119] Since the connector 110 in the built-in component 100 is linked to the implant screw 12 , the inner magnet 130 is linked to the rotating member 120 . When the first motor 220 drives the first outer magnet 240 to rotate, the first outer magnet 240 attracts the inner magnet 130 to rotate.

[0120] The inner magnet 130 rotates synchronously with the rotating member 120, the second protrusion 121 is blocked by the first protrusion 111, and the first outer magnet 240 continues to rotate. The magnetic force of the inner magnet 130 hinders the rotation of the first outer magnet 240, thereby hindering the rotation of the first motor 220. The rotation of the slider 252 driven by the first motor 220 is then hindered, causing the slider 252 to slide unsmoothly. As a result, a second inflection point appears in the second measured curve measured by the current measurement circuit 230.

[0121] The current corresponding to the second inflection point in the second measured curve is recorded, and the rotation angle corresponding to the current at the second inflection point is found based on the corresponding relationship between the rotation angle of the first motor 220 and the current. The rotation angle is the second rotation angle of the implant screw 12 .

[0122] The first rotation angle is compared to the second rotation angle.

[0123] If the first rotation angle is the same as the second rotation angle, it proves that the implant screw 12 is not loose.

[0124] If the first rotation angle is different from the second rotation angle, the difference between the first rotation angle and the second rotation angle is the loosening angle of the implant screw 12 .

[0125] The first external magnet 240 and the slider 252 have the same rotation angle. The current measured by the current measurement circuit 230 is associated with the rotation angle of the first external magnet 240. The uniform rotation of the first motor 220 is used to obtain a curve of the current changing with time. This curve is a theoretical curve, and each current in the theoretical curve corresponds to a rotation angle.

[0126] Then, after the patient has the implant, a measured curve is generated. The time of the inflection point in the measured curve is the moment when the first protrusion 111 and the second protrusion 121 offset each other to prevent the rotation of the internal magnet 130. The rotation angle corresponding to the current at the inflection point is the rotation angle of the implant screw 12.

[0127] After the patient has used the implant for a period of time, the above measurement is performed again to obtain another rotation angle of the implant screw 12 . If the two rotation angles are different, the difference between the two rotation angles is the loosening angle of the implant screw 12 .

[0128] This method can be used to find the exact value of the loosening angle of the implant screw 12 , so as to determine whether the implant screw 12 needs to be re-tightened.

[0129] The implant screw loosening detection device also includes a controller, which stores a theoretical curve and two measured curves, records the rotation angles corresponding to the two inflection points, and outputs the loosening angle.

[0130] 8 , the implant screw pre-tightening device of the present invention is implemented as follows:

[0131] The implant screw pre-tightening device includes an internal component 100 and a pre-tightening component 300 . The internal component 100 is the same as the above solution. The pre-tightening component 300 includes a second housing 310 , a second motor 320 and a second external magnet 330 .

[0132] The second motor 320 and the second external magnet 330 are both arranged inside the second shell 310. The output shaft of the second motor 320 is connected to the second external magnet 330. The two magnetic poles of the second external magnet 330 are arranged side by side. The second motor 320 drives the second external magnet 330 to rotate around the vertical axis.

[0133] The built-in component 100 is set inside the patient's implant base 11, the connector 110 is connected to the implant screw 12, and the pre-tightening component 300 is placed above the built-in component 100 and the implant. The second external magnet 330 is driven by the second motor 320, and the second external magnet 330 attracts the internal magnet 130 and drives the rotating part 120 to rotate.

[0134] Until the second protrusion 121 of the rotating member 120 is blocked by the first protrusion 111 of the connector 110 , the rotation of the inner magnet 130 is stopped, and the second motor 320 continues to drive the second outer magnet 330 to rotate.

[0135] When the magnetic poles of the second external magnet 330 are exactly opposite to the magnetic poles of the internal magnet 130, the second external magnet 330 continues to rotate after passing the critical point where the internal magnet 130 is stationary, the internal magnet 130 is rapidly reversed by the magnetic force, driving the second protrusion 121 to reverse and hit the first protrusion 111, so that the first protrusion 111 drives the connector 110 and the pre-tightening implant screw 12, without the need to drill holes on the restoration 13, avoiding damage to the restoration 13 or the implant base 11.

[0136] As a further improvement of the above technical solution, as shown in FIG. 8 , a second baffle 311 is provided at the bottom of the second shell 310 , and the second baffle 311 is located directly below the second external magnet 330 .

[0137] When detecting loosening of the implant screw, the second baffle 311 is abutted against the top of the restoration 13 to determine the distance between the second shell 310 and the implant, thereby preventing the second shell 310 from driving the second external magnet 330 up and down during the pre-tightening process, resulting in insufficient pre-tightening force.

[0138] Specifically, the implant screw pre-tightening device includes an internal component 100 and a pre-tightening component 300 . The internal component 100 is the same as the above solution. The pre-tightening component 300 includes a second housing 310 , a second motor 320 and a second external magnet 330 .

[0139] The second motor 320 and the second external magnet 330 are both arranged inside the second shell 310. The output shaft of the second motor 320 extends downward. The second external magnet 330 is cylindrical. The output shaft is connected to the axis of the second external magnet 330. The two magnetic poles of the second external magnet 330 are symmetrically distributed on both sides of the axis. The second motor 320 drives the second external magnet 330 to rotate around the axis.

[0140] The second baffle 311 is disposed at the bottom of the second housing 310 , and is located directly below the second outer magnet 330 .

[0141] 9 to 10 , the method for using the implant screw pre-tightening device of the present invention is described in the following embodiments:

[0142] The patient has an implant implanted, the built-in component 100 is placed in the inner cavity of the implant base 11 , and the restoration 13 is installed on the upper part of the implant base 11 .

[0143] As shown in Figure 10, the pre-tightening component 300 is placed above the built-in component 100 and the implant, and the second motor 320 is started to make the second external magnet 330 rotate forward. The second external magnet 330 is magnetically attracted to the internal magnet 130, and the internal magnet 130 drives the rotating part 120 to rotate forward until the second protrusion 121 abuts against the first protrusion 111 of the joint 110.

[0144] The second motor 320 continues to drive the second external magnet 330 to rotate forward. The magnetic poles of the second external magnet 330 are opposite to the magnetic poles of the internal magnet 130. After the second external magnet 330 continues to rotate forward, the internal magnet 130 is reversed by the magnetic force and drives the rotating member 120 to reverse. The second protrusion 121 hits the first protrusion 111 to tighten the implant screw 12.

[0145] Repeat the above steps to complete the pre-tightening of the implant screw 12.

[0146] When the magnetic poles of the second external magnet 330 are opposite to the magnetic poles of the internal magnet 130, the internal magnet 130 is rapidly reversed by the magnetic force, driving the second protrusion 121 to reverse and hit the first protrusion 111, so that the first protrusion 111 drives the connector 110 and the pre-tightening implant screw 12, eliminating the need to drill holes in the restoration 13, thereby avoiding damage to the restoration 13 or the implant base 11.

[0147] In some embodiments, as shown in Figure 11, the pre-tightening component 300 is placed above the built-in component 100 and the implant, the second motor 320 is started and reversed to reverse the second external magnet 330, and the second external magnet 330 is magnetically attracted to the internal magnet 130, and the internal magnet 130 drives the reversing member 120 to reverse until the second protrusion 121 abuts against the first protrusion 111 of the connector 110.

[0148] The second motor 320 continues to drive the second external magnet 330 to reverse, and the magnetic poles of the second external magnet 330 are opposite to the magnetic poles of the inner magnet 130. After the second external magnet 330 continues to reverse, the inner magnet 130 is caused to rotate forward under the action of magnetic force and drives the rotating member 120 to rotate forward. The second protrusion 121 hits the first protrusion 111, causing the implant screw 12 to lose its pre-tightening force.

[0149] The above steps are repeated to make the implant screw 12 lose its pre-tightening force, and then the second external magnet 330 continues to rotate forward to completely screw out the implant screw 12.

[0150] When the magnetic poles of the second external magnet 330 are opposite to the magnetic poles of the internal magnet 130, the internal magnet 130 rotates rapidly in the forward direction under the action of the magnetic force, driving the second protrusion 121 to rotate in the forward direction and hit the first protrusion 111 on the connector 110, so that the connector 110 drives the implant screw 12 to rotate, causing it to lose its pre-tightening force and unscrew, without the need to drill a hole in the restoration 13, thereby avoiding damage to the restoration 13 or the implant base 11.

[0151] The above specifically describes the preferred embodiments of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An implant screw loosening detection device, characterized in that: include: The built-in component is arranged inside the implant base, and the built-in component includes: A connector, the bottom of which is used to connect to the implant screw, and the top of the connector is provided with a first protrusion; A rotating member, which is rotatably arranged on the top of the joint, a second convex block is arranged on the bottom of the rotating member, and the first convex block is located on the rotation track of the second convex block; An inner magnet, which is disposed on the rotating member, and two magnetic poles of the inner magnet are horizontally arranged side by side; A detection component comprising: a first shell; A first motor, which is disposed in the first housing; A current measuring circuit, which is arranged in the first housing; A first external magnet is connected to the first motor, two magnetic poles of the first external magnet are horizontally arranged side by side, and the first motor drives the first external magnet to rotate around a vertical axis; A sliding resistor is provided with a resistor and a slider, wherein the resistor is bent into a ring shape, the head and tail ends of the resistor are separated from each other, the head end of the resistor and the slider are electrically connected to the current measurement circuit, the slider is connected to the first motor, and the first motor drives the slider to slide along the resistor.

2. The implant screw loosening detection device according to claim 1, characterized in that: The detection component also includes a sound sensor, which is electrically connected to the current measurement circuit. After the sound sensor detects sound, it sends an electrical signal to the current measurement circuit.

3. The implant screw loosening detection device according to claim 1, characterized in that: A first baffle is provided at the bottom of the first shell, and the first baffle is located directly below the first external magnet.

4. The implant screw loosening detection device according to claim 3, characterized in that: A plurality of clamping plates are provided at the bottom of the first shell, the plurality of clamping plates are distributed at intervals along the rotation circumference of the first outer magnet, and the plurality of clamping plates are arranged around the periphery of the first baffle.

5. A method for using a device for detecting loosening of implant screws, characterized in that: The implant screw loosening detection device according to any one of claims 1 to 4 further comprises the following steps: S11, the first motor drives the slider to rotate, records the current measured by the current measurement circuit at each rotation angle, and establishes a corresponding relationship between the rotation angle of the first motor and the current; S12, starting the first motor to make the slider rotate at a constant speed, and generating a curve of current changing with time as a theoretical curve; S13, placing the built-in component inside the implant base; S14, the detection component is close to the built-in component, the first motor is started, and a curve of current changing over time is generated as a measured curve; S15, when the first convex block prevents the second convex block from rotating, an inflection point appears in the measured curve; S16, recording the current corresponding to the inflection point, and finding out the corresponding rotation angle as the rotation angle of the implant screw according to the corresponding relationship between the rotation angle and the current; S17. After a period of time, repeat S14 to S16, and the difference between the two rotation angles is the loosening angle of the implant screw.

6. The method for using the implant screw loosening detection device according to claim 5, characterized in that: The implant screw loosening detection device also includes a controller, which stores the theoretical curve and the measured curve, records the rotation angles corresponding to the two inflection points, and outputs the loosening angle.

7. An implant screw pre-tightening device, characterized in that: include: The built-in component is arranged inside the implant base, and the built-in component includes: A connector, the bottom of which is used to connect to the implant screw, and the top of the connector is provided with a first protrusion; A rotating member, which is rotatably arranged on the top of the joint, a second convex block is arranged on the bottom of the rotating member, and the first convex block is located on the rotation track of the second convex block; An inner magnet, which is disposed on the rotating member, and two magnetic poles of the inner magnet are horizontally arranged side by side; A preload assembly comprising: a second shell; A second motor, which is disposed in the second housing; The second external magnet is connected to the second motor, the two magnetic poles of the second external magnet are horizontally arranged side by side, and the second motor drives the second external magnet to rotate around a vertical axis.

8. The implant screw pre-tightening device according to claim 7, characterized in that: A second baffle is disposed at the bottom of the second shell, and the second baffle is located directly below the second external magnet.

9. A method for using an implant screw pre-tightening device, characterized in that: The implant screw pre-tightening device according to any one of claims 7 to 8 further comprises the following steps: S21, implanting an implant in a patient, and placing the built-in component inside the implant base; S22, the pre-tightening component approaches the built-in component and starts the second motor; S23, the first protrusion prevents the second protrusion from rotating, the second motor continues to drive the second outer magnet to rotate, the magnetic pole of the second outer magnet is opposite to the magnetic pole of the inner magnet, so that the inner magnet drives the rotating member to reverse, and the second protrusion hits the first protrusion; S24, repeat S22 to S23 until the implant screw is pre-tightened.

10. The method for using the implant screw pre-tightening device according to claim 9, characterized in that: Switching the rotation direction of the second motor causes the implant screw to lose its pre-tightening force.

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