Wrench for dental implant

Abstract

The invention relates to a wrench for dental implantation, which belongs to the technical field of dental surgical instruments, and comprises a handle, a sleeve and a forward and reverse rotation switching mechanism connecting the handle and the sleeve, the handle is provided with a palm contact part and a finger contact part which are bent at a preset angle, so that the force application direction of a thumb is closer to the axial direction of an implant, and the control precision is improved; the forward and reverse rotation switching mechanism comprises a slidable and rotatable rotating buckle, a direction limiting latch, a direction limiting clamping groove on the sleeve and a spring, rapid switching of forward and reverse rotation driving of the sleeve can be realized through backward pulling, rotating and rebounding, a fixing marble is arranged in the sleeve to temporarily fix the planting nail, and an elastic ring with a track is arranged outside the sleeve to enhance holding skid resistance. The problems that an existing wrench is poor in operation stability, inaccurate in axial control and tedious in forward and reverse rotation switching in a narrow oral cavity are solved, and labor-saving, fine and reliable operation is achieved.

Description

Technical Field

[0001] This invention relates to the field of dental surgical instruments, and in particular to a dental implant wrench. Background Technology

[0002] In dental implant surgery, the precise placement of the implant is the key to the success of the surgery. This process usually relies on a manual wrench to screw the implant into the pre-prepared jawbone cavity. Due to the small space inside the oral cavity and the limited field of vision, and the extremely high requirements for axial precision and torque control of the implantation, the stability, controllability and convenience of the implant wrench are put forward.

[0003] Currently, manual implant wrenches used in clinical practice and existing patented technologies have the following main shortcomings:

[0004] First, in terms of structural design and spatial adaptation, most wrenches are designed with a straight bar, which causes the operating handle to be far away from the actual implantation point, resulting in a long control lever arm. This makes it difficult for doctors to directly control the implantation direction, and even slight hand movements will be amplified, leading to axial deviation of the implantation. In addition, some improvements aimed at enhancing functionality, such as the integration of measuring arms, have instead made the tool head structure more complex and larger, further exacerbating the difficulty of operation in the narrow oral cavity.

[0005] Secondly, there are significant defects in operation and ergonomics. First, the direction control is inaccurate: the implantation direction mainly relies on the operator's palm pushing and pulling on the distal end of the instrument. The control point is too far from the implant, resulting in obvious torque transmission errors and making it difficult to achieve fine axial adjustment. Second, switching between forward and reverse rotation is cumbersome: when the existing wrench needs to change the screw-in / screw-out direction, it often requires changing tool components or performing multiple mechanical adjustments, which is cumbersome and interrupts the continuity of the surgery. Third, the driving method is laborious: the final rotation driving force relies on the operator's thumb and forefinger pinching and twisting, which is an inefficient and laborious lever method. When performing final tightening or disassembly that requires large torque, it is easy to cause hand fatigue. When fine adjustment is required, the small rotation of the fingers is difficult to accurately control the rotation angle of the implant, resulting in a mismatch between the operation range and the adjustment amount, affecting the initial stability of the implantation.

[0006] Therefore, there is an urgent need for a manual dental implant wrench that can be highly adapted to the limited space of the oral cavity, and organically integrates precise directional control, convenient bidirectional switching and labor-saving fine drive, so as to improve the accuracy, efficiency and reliability of the surgery. Summary of the Invention

[0007] This invention provides a dental implant wrench that offers greater stability, more precise axial control, easier forward / reverse switching, and less effort in operation within a confined oral cavity. It addresses the shortcomings of existing dental implant wrenches, such as poor operational stability, large directional control deviation, and laborious forward / reverse adjustment within a confined oral cavity, as well as low precision.

[0008] The present invention provides the following solution to the above-mentioned technical problems: a dental implant wrench, comprising a handle, a sleeve, and a forward / reverse switching mechanism connected between the two, wherein the handle is provided with a palm contact part and a finger contact part, which are bent at a preset angle, the preset angle being 120° to 160°.

[0009] The forward / reverse switching mechanism includes a slidable and rotatable rotary buckle, a limiting tooth provided on the rotary buckle, a limiting groove provided on the sleeve, and a spring that provides elastic restoring force.

[0010] The forward / reverse switching mechanism also includes a fixing buckle and an elastic ring. The fixing buckle is used to axially limit the sleeve to the front end of the handle, and the elastic ring is sleeved on the outside of the sleeve to provide a gripping and anti-slip function.

[0011] The sleeve is equipped with a retaining ball, which is used to contact the side of the implant nail after the implant nail is inserted into the sleeve, so as to limit the position of the implant nail inside the sleeve.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the palm contact area and the finger contact area are integrally formed or fixedly connected. The integral forming or the fixed connection can ensure the integrity and high strength of the structure between the palm contact area and the finger contact area, and avoid relative displacement or loosening due to force during use. This improves the reliability and durability of the tool. At the same time, the stable structure also provides a basis for achieving the preset and precise ergonomic bending angle.

[0014] Furthermore, the bending angle of the handle is configured such that when the hand grasps the palm contact area and the thumb presses on the finger contact area, the direction of the thumb's force is the axial control direction of the implant. By optimizing the bending angle, when the operator (doctor) holds and applies force naturally, the main force direction of the thumb can be closer to the axial control direction required for implant insertion or removal. This design effectively converts the operator's pressing force more directly into the axial control force of the implant, reducing the component force, thereby improving the accuracy and intuitiveness of axial control of the implant during surgery, reducing the operational risk caused by deviation in the direction of force application, and enhancing the operating feel and efficiency.

[0015] Furthermore, the rotating buckle, through pulling, pushing, and automatically rebounding under the action of the spring, drives the limiting tooth to rotate 180°, selectively engaging with one or the other side of the limiting groove. This achieves the switching of the sleeve's forward or reverse drive state relative to the handle, making the forward / reverse switching action intuitive and easy to complete with one hand. The automatic rebound function provided by the spring ensures that the mechanism can automatically reset to a stable engagement state after the switching action is completed, preventing idle rotation or failure due to failure to reset properly. The 180° rotation achieves engagement with different sides of the limiting groove, which is a simple and reliable switching method that ensures a definite, slip-free torque transmission in both forward tightening and reverse loosening drive states.

[0016] Furthermore, the limiting teeth are semi-circular structures, and the limiting groove is a groove that matches the semi-circular limiting teeth. The rotating buckle is provided with a buckle groove for sliding along the handle axis. The buckle groove (308) has bent buckle positions at both ends. The engagement form of the semi-circular teeth and the matching groove has a large contact area and uniform force, which can withstand a large unidirectional torque without being easily damaged or slipping, ensuring the reliability of power transmission. The buckle groove provides precise guidance for the axial sliding of the rotating buckle, making its pull-back and rebound actions smooth and stable, without swaying. This is an important structural guarantee for achieving the aforementioned smooth switching operation.

[0017] Furthermore, the sleeve is provided with a track corresponding to the elastic ring, and the sleeve is provided with a ball hole corresponding to the fixing ball. The track can restrict the elastic ring from moving circumferentially or axially within it, ensuring that the anti-slip ring is fixed in position during operation, providing a durable and effective grip and anti-slip function, while preventing it from accidentally falling off. The specially opened ball hole provides precise installation and movement space for the fixing ball, ensuring that the ball can be reliably ejected to restrict the position of the implant, and can be smoothly pressed back into the hole when the implant is inserted or removed, realizing a simple and effective temporary fixing function for the implant.

[0018] Furthermore, the handle, sleeve, rotating buckle, and fixing buckle are made of 304 stainless steel through CNC machining. The use of 304 stainless steel provides excellent strength, hardness, corrosion resistance, and biocompatibility, making it ideal for repeated sterilization and use in dental surgical environments. This ensures the long service life of the tool and medical safety. The CNC machining process enables high-precision and high-consistency machining of complex structures (such as bending handles, precision teeth, and slots), ensuring the accuracy of the fit between various parts. This improves the smoothness of the wrench operation, the reliability of the switching mechanism, and the accuracy of the final torque transmission.

[0019] The beneficial effects of this invention are as follows: This invention provides a dental implant wrench, which has the following advantages:

[0020] 1. It can significantly improve the intuitiveness and accuracy of axial control. The bending angle has been optimized so that when the doctor holds the implant naturally, the direction of the force applied by the thumb can be highly aligned with the implantation axis. This achieves "coaxial perception" between the control point (thumb) and the force point (implant), and directly converts the pressure of the thumb into axial control force for the implant. This greatly reduces control deviation and torque transmission error, allowing the doctor to make more precise axial adjustments by feel.

[0021] 2. It achieves a highly efficient, labor-saving, and precise driving method. Combined with the aforementioned bent handle, the driving method changes from the traditional "finger pinching and rotation" to "firm hand grip combined with thumb pressing and pushing". This driving mode is more in line with human mechanics. The palm provides a stable fulcrum and holding force, while the thumb pushes in a direction close to the implant axis, forming a more effective force transmission path. It is not only more labor-saving, especially during final tightening, but also allows for a small thumb pushing motion to correspond to a small rotation angle of the implant, realizing the transformation from "large-scale pinching" to "precise pressing" and improving the precision of angle control.

[0022] 3. Provides a fast, reliable, and one-handed forward / reverse switching function. The forward / reverse switching mechanism consists of a rotating buckle, directional locking teeth, directional locking groove, and spring. The switching can be completed in three steps: "pull back → rotate 180° → automatic rebound". The operation process is simple and intuitive, and doctors can quickly complete it with one hand. The seamless connection between tightening and loosening operations ensures the continuity of the operation. The spring ensures that the mechanism automatically resets and stably engages to prevent free rotation. The semi-circular locking teeth and grooves have a large contact area, which can reliably transmit unidirectional torque. The structure is simple and durable.

[0023] 4. Enhanced overall stability and safety of the procedure: An elastic ring with a track is set on the outside of the sleeve, and a fixing ball is set inside. The elastic ring provides a reliable grip and anti-slip function, and its track design prevents the ring from shifting or falling off, ensuring stable operation in a moist oral environment. The fixing ball inside the sleeve can temporarily hold the implant, preventing it from accidentally falling off or rotating before it is in place, thus improving the safety and controllability of the surgical procedure.

[0024] 5. Ensures high reliability, long lifespan, and medical safety of the instrument. Key components are made of 304 stainless steel and manufactured using CNC machining. 304 stainless steel has excellent strength, corrosion resistance, and biocompatibility, and can withstand repeated clinical sterilization, making it safe and reliable. The CNC machining process ensures high precision and consistency in complex and precise structures such as bending angles and locking teeth and grooves, making the various components work smoothly and the operation reliable, thereby ensuring the long-term stable performance and accurate torque transmission of the entire wrench.

[0025] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0027] Figure 1 A three-dimensional rendering of a dental implant wrench provided in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram showing the disassembled form of a dental implant wrench according to an embodiment of the present invention;

[0029] Figure 3 A front view of a dental implant wrench provided in an embodiment of the present invention;

[0030] Figure 4 This is a top view of a rotating clip in a dental implant wrench according to an embodiment of the present invention;

[0031] Figure 5 This is a front view of a rotating clip in a dental implant wrench according to an embodiment of the present invention;

[0032] Figure 6 This is a side view of a rotating clip in a dental implant wrench according to an embodiment of the present invention;

[0033] Figure 7 A top view of a dental implant wrench provided in an embodiment of the present invention;

[0034] Figure 8 This is a bottom view of a dental implant wrench provided in an embodiment of the present invention.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Handle; 101. Palm contact area; 102. Finger contact area; 2. Sleeve; 201. Fixed ball; 202. Ball hole; 3. Forward / reverse switching mechanism; 301. Rotary latch; 302. Directional locking tooth; 303. Directional locking groove; 304. Spring; 305. Fixed latch; 306. Elastic ring; 307. Rail; 308. Locking groove. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-8 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0038] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] like Figure 1-8 As shown, the present invention provides a dental implant wrench, including a handle 1, a sleeve 2, and a forward / reverse switching mechanism 3 that connects the two and is responsible for transmitting torque and switching direction;

[0041] The handle 1 is the main gripping part for the doctor's operation. It is designed as a bent structure, including a palm contact part 101 for the hand to hold and a finger contact part 102 for the thumb to press and apply force. The two parts are bent at a preset angle optimized by ergonomics (such as 137°).

[0042] This angle is optimized so that when the doctor naturally holds the handle 1, the direction of the force exerted by his thumb on the finger contact part 102 can be closer to or even parallel to the long axis direction of the implant to be implanted (i.e. the axis that needs to be controlled).

[0043] This design overcomes the shortcomings of traditional straight-arm wrenches, such as long lever arm and indirect control, and transmits the doctor's control intentions to the implant more directly and accurately. The palm contact part 101 and the finger contact part 102 are preferably integrally molded to ensure structural strength and stability.

[0044] The sleeve 2 is the working end of the wrench, and its front end has a shape (such as hexagon, cross, etc.) that matches the drive interface of the implant (implant) used, for fitting and driving the implant.

[0045] The sleeve 2 has a fixed ball 201 inside, which is installed in the ball hole 202 opened on the side wall of the sleeve 2;

[0046] Once the implant pin is inserted into the sleeve 2, the fixing ball 201 will lock into the corresponding recess on the side wall of the implant pin or form frictional contact with the side wall, thereby temporarily fixing the implant pin and preventing it from accidentally falling off before being transferred to the surgical site.

[0047] On the outside of the sleeve 2, there is also an elastic ring 306. The elastic ring 306 can be embedded in the specially machined track 307 on the surface of the sleeve 2 to prevent it from moving axially or falling off.

[0048] The elastic band 306 uses a high coefficient of friction material (such as rubber and silicone) to provide anti-slip function when the doctor's fingers grip part 2 of the sleeve;

[0049] like Figure 2 As shown, the forward and reverse switching mechanism 3 is the core of realizing bidirectional drive of a single handle. It mainly consists of a rotating buckle 301, a limiting tooth 302, a limiting groove 303, a spring 304, and a fixed buckle 305. The fixed buckle 305 is fixedly installed on the front end of the handle 1 to limit the sleeve 2 axially, so that it can rotate relative to the handle 1 but will not fall off. The limiting grooves 303 are evenly opened on the base of the sleeve 2.

[0050] The rotating buckle 301 is slidably fitted onto the front end of the handle 1. Its inner side is provided with a limiting tooth 302 (semi-circular), and its outer side is provided with a protrusion or texture for finger operation.

[0051] The rotating buckle 301 has a buckle groove 308, which cooperates with the guide structure on the handle 1, so that it can slide along the axis of the handle 1 and rotate around the axis at a certain angle (such as 180°). The spring 304 is installed between the rotating buckle 301 and the fixed buckle 305 to provide the rotating buckle 301 with an elastic restoring force toward the sleeve 2.

[0052] The specific working principle and usage method of this invention are as follows:

[0053] A. Planting nail installation (forward rotation mode);

[0054] 1. Place the implantation pin inside the sleeve 2, and use the fixing ball 201 to contact the two sides of the implantation pin to restrict the position of the implantation pin in the sleeve 2, so as to ensure the stability of the implantation pin after it is inserted;

[0055] 2. Confirm that the rotating buckle 301 is in the forward rotation slot position. If the position is reversed, manually press the buckle back with your thumb, push it to the right along the buckle slot 308, and rotate it to the other side of the slot. After releasing your thumb, the buckle will automatically spring back to the limit position, completing the engagement and realizing the switching of the rotation direction.

[0056] 3. Press the thumb on the finger contact point 102, wrap the palm around the palm contact point 101, and after determining the implant placement position in the oral cavity, rotate the handle 1 clockwise to tighten the implant.

[0057] B. Implant nail removal and reversal mode;

[0058] 1. Confirm that the forward and reverse rotating buckle 301 is in the reverse slot position. If the position is reversed, manually press the buckle back with your thumb, push it to the left along the buckle slot 308, and rotate it to the other side of the slot. Release your thumb, and the buckle will automatically spring back to the limit position to complete the engagement and realize the switching of the rotation direction.

[0059] 2. Press the thumb on the finger contact point 102, wrap the palm around the palm contact point 101, and align the sleeve 2 with the implant nail head cap inside the mouth;

[0060] 3. Rotate handle 1 counterclockwise until the implant is completely unscrewed.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Content not described in detail in this specification is prior art known to those skilled in the art.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A dental implant wrench comprising a handle (1), a sleeve (2) and a forward-reverse switching mechanism (3) connected therebetween, characterized in that: The handle (1) is provided with a palm contact part (101) and a finger contact part (102), which are bent at a preset angle between them, and the preset included angle is 120°-160°. The forward and reverse rotation switching mechanism (3) comprises a rotatable and slidable rotating buckle (301), a direction limiting tooth (302) arranged on the rotating buckle (301), a direction limiting slot (303) arranged on the sleeve (2), and a spring (304) providing elastic restoring force. The forward and reverse rotation switching mechanism (3) further comprises a fixed buckle (305) and a elastic ring (306), the fixed buckle (305) is used for axially limiting the sleeve (2) at the front end of the handle (1), and the elastic ring (306) is sleeved outside the sleeve (2) to provide a non-slip function for holding. The sleeve (2) is provided with a fixed bead (201) inside, which is used for contacting the side of the sleeve (2) after the implant is placed into the sleeve (2) to limit the position of the implant in the sleeve (2).

2. The dental implant wrench according to claim 1, wherein The palm contact part (101) and the finger contact part (102) are integrally formed or fixedly connected.

3. The dental implant wrench according to claim 2, wherein The bending angle of the handle (1) is configured such that when the palm holds the palm contact part (101) and the thumb is pressed on the finger contact part (102), the force direction of the thumb is the axial control direction of the implant.

4. The dental implant wrench according to claim 1, wherein The rotating buckle (301) is pulled back, pushed and rotated, and automatically rebounds under the action of the spring (304), drives the direction limiting tooth (302) to rotate 180°, and selectively engages with one side or the other side of the direction limiting slot (303), so as to realize the switching of the forward rotation or reverse rotation driving state of the sleeve (2) relative to the handle (1).

5. The dental implant wrench according to claim 4, wherein The direction limiting tooth (302) is a semicircular structure, the direction limiting slot (303) is a groove matched with the semicircular direction limiting tooth (302), and the rotating buckle (301) is provided with a buckle slot (308) for sliding along the axial direction of the handle (1), and the two ends of the buckle slot (308) are provided with bent buckle positions.

6. The dental implant wrench according to claim 1, wherein The sleeve (2) is provided with a track (307) corresponding to the elastic ring (306), and the sleeve (2) is provided with a bead hole (202) corresponding to the fixed bead (201).

7. The dental implant wrench according to claim 1, wherein The handle (1), the sleeve (2), the rotating buckle (301) and the fixed buckle (305) are made of stainless steel 304 material through CNC machining.

8. A method of implanting and removing implants using the dental implanting wrench according to any one of claims 1 to 7, characterized in that, The method comprises the following steps: The implant implantation step: a. Place the implant into the front end of the sleeve (2), and temporarily fix it by the fixed bead (201); b. Confirm that the forward and reverse rotation switching mechanism (3) is in the forward rotation engagement state, if not, pull back the rotating buckle (301), rotate 180° and release it, so as to switch it to the forward rotation state; c. Hold the palm contact part (101) with the palm, and press the thumb on the finger pressing part (102), and align the implant with the jaw hole; d. Drive the handle (1) and the sleeve (2) to rotate clockwise by repeatedly pressing the thumb in the direction close to the axial direction of the implant, and rotate the implant; The implant extraction step: e. After operating the rotating buckle (301), pull it back, rotate 180° and release it, so that it switches to the reverse occlusion state; f. Put the sleeve (2) into the driving interface of the implanted implant; g. By pressing the thumb in the opposite direction, rotate the driving handle (1) and the sleeve (2) counterclockwise to rotate the implant out.

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