Bone extrusion instrument with limiting function

Abstract

The utility model provides a bone extrusion instrument with a limiting function, which comprises a handle and a working head fixed on the handle, a plurality of limiting grooves are arranged at the position of the working head close to the working end of the working head, and the plurality of limiting grooves are sequentially arranged from near to far away from the working end; a limiting device is further included, the limiting device comprises a limiting block and a fixing screw, and the limiting block is provided with an axially-through sleeving hole and a screw hole penetrating from the outer side face of the limiting block to the sleeving hole in the radial direction. The limiting block is arranged on the working head in a sleeving mode through the sleeving hole, and the fixing screw is connected into the screw hole of the limiting block in a screwed mode and abuts against one limiting groove so that the limiting block can be fixed to the working head. For maxillary sinus lifting operations of different tooth positions, a doctor can fix the limiting block at different positions of the limiting groove to adapt to maxillary sinus lifting of different tooth positions, and the maxillary sinus lifting device has the advantage of being easy and convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a bone compression instrument with a limiting function. Background Art

[0002] The maxillary sinus floor augmentation technique is a surgical procedure used to increase bone volume in the posterior maxillary region, often used to provide adequate bone support for dental implants. Because bone depth in the posterior maxillary region is often insufficient, particularly after tooth loss, a maxillary sinus floor augmentation technique can create favorable conditions for implant placement. Currently, there are two main methods for maxillary sinus floor augmentation: the lateral wall fenestration method and the internal augmentation method. The internal augmentation method is less invasive and suitable for applications requiring a smaller elevation (typically between 3 and 5 mm). During surgery, an implant socket is drilled in the edentulous area using standard socket preparation techniques. The drill stops just before the sinus floor to prevent rupture of the sinus membrane. A special bone compression tool is then used to gently tap the bone compression tool through the implant socket, lifting the sinus floor periosteum and the overlying bone upward. This step requires considerable skill to avoid rupture of the sinus membrane. However, during surgery, the surgical field is obstructed by mucosa, adjacent teeth, and the presence of blood, which limits the surgical field of view. This makes it difficult to discern the markings on the working end of the bone compression instrument, making it difficult to assess the depth of insertion. At the same time, when performing this operation, the surgeon needs to use a small hammer to knock. Usually, one hand holds the bone compression instrument and the other hand holds the hammer to knock. At the same time, the surgeon needs to observe the depth of the instrument after knocking and control the depth by the knocking force. The operation is inconvenient. Due to the different bone qualities of patients, greater force is required when performing it on patients with harder bones. If the surgeon fails to coordinate hands and eyes in an unclear field of view, it may easily lead to rupture of the sinus membrane. Utility Model Content

[0003] Therefore, in order to solve the above problems, the present invention provides a bone compression instrument with a limiting function.

[0004] To achieve the above purpose, the technical solutions provided by the present invention are as follows:

[0005] A bone compression instrument with a limiting function comprises a handle and a working head fixed on the handle, wherein the end of the working head is a working end; the working head is provided with a plurality of limiting grooves near its working end, and the plurality of limiting grooves are arranged in sequence from near to far from the working end; the instrument also comprises a limiting device, wherein the limiting device comprises a limiting block and a fixing screw, the limiting block having an axially penetrating sleeve hole and a screw hole radially penetrating from the outer side surface of the limiting block to the sleeve hole; the limiting block is sleeved on the working head through the sleeve hole, and the fixing screw is screwed into the screw hole of the limiting block and presses against one of the limiting grooves to fix the limiting block on the working head.

[0006] Furthermore, the cross section of the limiting block in the radial direction is elliptical.

[0007] Furthermore, the screw hole is opened at the short axis position of the ellipse.

[0008] Furthermore, the surface of the limiting block on one side facing the working end is an arc-shaped surface.

[0009] Furthermore, the limiting groove is an annular groove.

[0010] Furthermore, the working head has a mounting section with a constant diameter, and a plurality of limiting grooves are provided on the mounting section.

[0011] Furthermore, the sleeve hole of the limiting block is adapted to the installation section.

[0012] Furthermore, the working head is a "Z"-shaped rod structure, including a first rod segment, a second rod segment and a third rod segment connected to each other, the first rod segment and the third rod segment are parallel but not coaxially arranged, the second rod segment is an inclined segment and is connected between the first rod segment and the third rod segment, the working end and multiple limiting grooves are all formed on the first rod segment, and the third rod segment is connected to the handle.

[0013] The technical solution provided by the utility model has the following beneficial effects:

[0014] 1. By providing multiple limiting grooves and a limiting device on the working head from near to far, once the limiting block is moved to the appropriate position, tightening the fixing screw secures the limiting block to the working head. During surgical percussion, the limiting block prevents the working end of the working head from entering too deeply, which could cause sinus membrane rupture. The combination of the limiting block and the fixing screw allows for easy assembly and disassembly. For maxillary sinus lift surgeries in different tooth positions, the surgeon can fix the limiting block in different limiting grooves to accommodate the specific maxillary sinus lift procedure.

[0015] 2. The cross section of the limit block in the radial direction is elliptical. The limit block with an elliptical cross section can not only effectively limit the position, but also reduce the contact area, ensuring effective limiting in the single-tooth surgical position and improving the visual range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure shows a top view of the bone compression instrument with a limiting function in the embodiment;

[0017] Figure 2 FIG2 is a schematic diagram of a partial structural decomposition of a bone compression instrument with a limiting function in a side view according to an embodiment;

[0018] Figure 3The figure shows a partial structural cross-sectional view of the bone compression instrument with a limiting function in the embodiment in a side view;

[0019] Figure 4 Shown Figure 3 A magnified schematic diagram of area A in the middle;

[0020] Figure 5 The figure shows a cross-sectional view of the limiting block in the plane where the central axis is located in the embodiment;

[0021] Figure 6 Shown is a front view of a bone compression instrument with a limiting function in an embodiment;

[0022] Figure 7 Shown is another installation schematic diagram of the bone compression instrument with a limiting function in the embodiment. DETAILED DESCRIPTION

[0023] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the disclosure of this invention and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0024] In the description of the present invention, terms such as "up", "down", "left", "right", "front", and "back" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0025] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0026] Reference Figures 1 to 6 As shown, this embodiment provides a bone compression instrument with a limiting function, including a handle 1 and a working head 2 fixed to the handle 1, the end of the working head 2 being a working end 21. Specifically, in this embodiment, the working head 2 is a "Z"-shaped rod structure, including a first rod segment 201, a second rod segment 202, and a third rod segment 203 connected to each other. The first rod segment 201 and the third rod segment 203 are parallel but not coaxially arranged. The second rod segment 202 is an inclined segment and is connected between the first rod segment 201 and the third rod segment 203. The third rod segment 203 is connected to the handle. With this structure, the handle 1 and the working end 21 of the working head 2 are offset, making it easier to hold and operate. Of course, in other embodiments, the shape of the working head 2 is not limited to this, and can also be a straight rod structure.

[0027] The working head 2 is provided with a plurality of limiting grooves 22 near its working end 21. In this embodiment, the working end 21 and the limiting grooves 22 are both formed in the first rod segment 201, and the plurality of limiting grooves 22 are arranged in sequence from near to far from the working end; specifically, there are two limiting grooves 22, the first one is close to the working end 21, and the second one is farther away from the working end 21 than the first one.

[0028] It also includes a limiting device. Specifically, the limiting device includes a limiting block 3 and a fixing screw 4. The limiting block 3 has an axially through-hole 31 and a screw hole 32 radially through the outer side surface of the limiting block 3 to the sleeve hole 31; the limiting block 3 is sleeved on the working head 2 through the sleeve hole 31, and the fixing screw 4 is screwed into the screw hole 32 of the limiting block 3 and presses against one of the limiting grooves 33, thereby fixing the limiting block 3 on the working head 2; that is, when the limiting block 3 is moved to a suitable position, the fixing screw 4 is tightened, and when the fixing screw 4 presses against one of the limiting grooves 22, the limiting groove 22 also limits the fixing screw 4, thereby stably fixing the limiting block 3 on the working head 2.

[0029] For maxillary sinus lift surgeries at different tooth positions, the surgeon can adapt the procedure to the specific maxillary sinus position by fixing the stopper 3 in different positions of the stopper groove 22. That is, during the percussion operation, as the working end 21 enters the bone tissue, when the stopper 22 abuts the tissue surface and cannot go any deeper, it indicates that the percussion is in place. This prevents the working end 21 of the working head 2 from entering too deeply and causing rupture of the sinus membrane. Furthermore, the stopper 3 and the fixing screw 4 work together to facilitate assembly and disassembly.

[0030] Further preferably, in this embodiment, the radial cross-section of the stopper 3 is elliptical. The accompanying drawings of this embodiment do not disclose an elliptical cross-section. In this embodiment, the stopper 3 resembles an elliptical cylinder. The elliptical cross-section of the stopper 3 not only effectively limits the position but also reduces the contact area. Furthermore, in the case of a single missing tooth, the elliptical cross-section of the stopper 3 can also be used to operate in confined spaces, ensuring effective positioning even in single-tooth surgery and improving visibility.

[0031] Specifically, the screw hole 32 is provided at the short axis position of the ellipse, and the length of the screw hole 32 is shorter, which makes the operation more convenient.

[0032] The surface of the limiting block 3 on the side facing the working end 21 is an arc-shaped surface without sharp corners, which is not easy to cut tissue.

[0033] The limiting groove 22 is an annular groove, so that the limiting block 3 can be freely adjusted in the circumferential direction. Figure 6As shown, the long axis of the limit block 3 is set horizontally and can be switched to Figure 7 The major axis of the limit block 3 is shown to be vertically arranged, so that the position can be adjusted according to the actual situation.

[0034] The working head 2 has a mounting section of equal diameter, and a plurality of limiting grooves 22 are arranged on the mounting section; the sleeve hole 31 of the limiting block 3 is adapted to the mounting section; in this way, the same limiting block 3 can be switched to different positions at will without replacing the limiting block 3 with a different size of the sleeve hole 31.

[0035] The above-mentioned setting of the limit block 3 and the limit groove 22 of the bone compression instrument with a limit function is one of the more preferred embodiments of the present application. Of course, it is not limited to this in other embodiments. For example, the limit groove 22 can also be a blind hole structure adapted to the diameter of the fixing screw 4. In this way, the limit block 3 can only be assembled on the working head 2 in a single direction; for example, the limit block 3 has a circular or square cross-section in the radial direction; for example, the two limit grooves 22 can also be respectively set at the mounting sections with a diameter D1 and a diameter D2 (D2 is greater than D1). If so, when the position needs to be adjusted, the current limit block 3 installed on the mounting section with a diameter D1 is first removed, and then a limit block 3 with a corresponding sleeve hole 31 of a size D2 is replaced, and then installed on the mounting section with a diameter D2. Such operation will be more troublesome, and the removed limit block 3 is not easy to store; and so on.

[0036] The bone compression instrument with a limiting function disclosed in the above embodiment provides clinicians with a safer and easier-to-operate bone compression instrument during maxillary sinus surgery, thereby improving clinical treatment efficiency and effectively preventing the instrument from damaging the maxillary sinus.

[0037] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the form and details of the present invention without departing from the spirit and scope of the present invention as defined by the appended claims, and all of these changes are within the scope of protection of the present invention.

Claims

1. A bone compression instrument with a limiting function, comprising a handle and a working head fixed to the handle, wherein the end of the working head is a working end; characterized in that: The working head is provided with a plurality of limiting grooves near its working end, and the plurality of limiting grooves are arranged in sequence from near to far from the working end; it also includes a limiting device, and the limiting device includes a limiting block and a fixing screw, and the limiting block has an axially through-hole and a screw hole radially through from the outer side surface of the limiting block to the sleeve hole; the limiting block is sleeved on the working head through the sleeve hole, and the fixing screw is screwed into the screw hole of the limiting block and presses against one of the limiting grooves to fix the limiting block on the working head.

2. The bone compression instrument with a limiting function according to claim 1, characterized in that: The cross section of the limiting block in the radial direction is elliptical.

3. The bone compression instrument with a limiting function according to claim 2, characterized in that: The screw hole is arranged at the short axis position of the ellipse.

4. The bone compression instrument with a limiting function according to claim 1, characterized in that: The surface of the limiting block on one side facing the working end is an arc-shaped surface.

5. The bone compression instrument with a limiting function according to claim 1, characterized in that: The limiting groove is an annular groove.

6. The bone compression instrument with a limiting function according to claim 1, characterized in that: The working head has a mounting section with a constant diameter, and a plurality of limiting grooves are arranged on the mounting section.

7. The bone compression instrument with a limiting function according to claim 6, characterized in that: The sleeve hole of the limiting block is adapted to the installation section.

8. The bone compression instrument with a limiting function according to claim 1, characterized in that: The working head is a "Z"-shaped rod structure, including a first rod segment, a second rod segment and a third rod segment connected to each other, the first rod segment and the third rod segment are parallel but not coaxially arranged, the second rod segment is an inclined segment and is connected to the Between the first rod segment and the third rod segment, the working end and the plurality of limiting grooves are formed in the first rod segment. The third rod segment is connected to the handle.

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