An adjustable impression transfer bar for dental implants

Abstract

This utility model discloses an adjustable impression transfer rod for dental implants, specifically relating to the field of dental implant auxiliary equipment technology. It includes a main rod body and symmetrically arranged protruding sides at its top. A movable block is hinged between the two protruding sides. An installation rod is internally threaded onto the main rod body, with its bottom end and the bottom end of the main rod body located on the same horizontal plane. An alignment rod is axially rotatably mounted on the movable block. The impression transfer rod provided by this utility model reduces the length of the transfer rod located on the same axis by flipping the movable block and keeping it perpendicular to the main rod body. After the main rod body is installed, the movable block is flipped again to be coaxial with the main rod body. At this time, by rotating the alignment rod, the extended portion is used to move the top protrusion, causing the installation rod to rotate and protrude from the bottom end of the main rod body for installation. This solves the problems of traditional transfer rods being inconvenient to adjust and unsuitable for patients with small openings.

Description

Technical Field

[0001] This utility model relates to the field of dental implant auxiliary equipment technology, specifically to an adjustable impression transfer rod for oral implantation. Background Technology

[0002] The impression transfer rod is a crucial auxiliary instrument in the dental implant restoration process. Its core function is to accurately replicate the three-dimensional spatial position and axial orientation of the implant within the patient's mouth, thereby facilitating the subsequent fabrication of precise crowns, bridges, and other dental prostheses. In implant restoration, the prosthesis is not fabricated directly on the implant in the patient's mouth; instead, it needs to be made in the dental laboratory based on a model. The impression transfer rod is the connector between the patient's mouth and the model in the laboratory. It is installed on the implant in the mouth, and through the impression-taking process, its precise positional and directional information is transferred to the plaster model. The accuracy of this step directly determines whether the final prosthesis can perfectly fit the implant, be smoothly positioned, and establish a good occlusal relationship.

[0003] According to patent publication number CN223275525U, published on August 29, 2025, an impression transfer assembly is disclosed, comprising: a rod; the rod having a mounting hole extending along the rod; one end of the rod being a plug-in end for insertion into an implantation cavity on an implant; a screw; the screw being used to pass through the mounting hole and be threadedly connected to the implant to fix the rod to the implant; the outer surface of the rod having a first groove extending along the axial direction of the rod, and / or the outer surface of the rod having a second groove extending along the circumferential direction of the rod.

[0004] In existing technologies, including those mentioned in the patent, a common type is the window-type impression transfer rod. This consists of a bracket and a screw that can be threaded to the implant. The screw is typically inserted into the bracket and threaded onto the implant to fix the bracket in place. This method effectively achieves the insertion and fixation of the impression transfer rod. However, for some patients with small mouths, although the bracket can be inserted into the implant, the screw, because it is matched to the length of the bracket, needs to be inserted vertically from the top of the bracket through a window. In other words, the patient's mouth size must be at least larger than the length of the bracket protruding from the gum line plus the length of the screw to complete the installation of the impression transfer rod. Patients with small mouths cannot open their mouths to the required size, making the operation difficult. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable impression transfer rod for dental implantation to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an adjustable impression transfer rod for dental implants, comprising a main rod body and symmetrically arranged protruding sides on its top, a movable block hinged between the two protruding sides, an mounting rod internally threadedly mounted on the main rod body, the bottom end of the mounting rod and the bottom end of the main rod body being located on the same horizontal plane, an alignment rod axially rotatably mounted on the movable block, and an extension at the bottom end of the alignment rod being movably mounted between the symmetrically arranged protruding parts on the top of the mounting rod.

[0007] Preferably, each of the two protruding sides is provided with a threaded rod, and one end of the rod is movably disposed in a hole opened on the opposite outer wall of the movable block.

[0008] Preferably, an elastic sheet is provided on the protruding side, and a card portion is symmetrically provided on one side of the elastic sheet. The card portion is movably disposed in two mutually perpendicularly distributed first and second card slots opened on the outer wall of the movable block.

[0009] Preferably, the elastic sheet is provided with a retaining ring, and the main rod body is provided with a placement groove and a notch that are interconnected between them. The inner wall of the placement groove is provided with a through hole, and the retaining ring is movably disposed in the placement groove.

[0010] Preferably, the movable block has anti-slip slits symmetrically arranged on both sides.

[0011] Preferably, the mounting rod has mounting threads on its outer wall near the bottom end.

[0012] Preferably, the elastic sheet is a medical-grade elastic stainless steel sheet.

[0013] Preferably, the alignment rod is a medical-grade stainless steel rod.

[0014] Preferably, the mounting rod is a medical-grade stainless steel rod.

[0015] Preferably, the bottom end of the main rod is provided with an internal hexagonal protrusion.

[0016] In the above technical solution, the adjustable impression transfer rod for dental implantation provided by this utility model has the following beneficial effects: by flipping the movable block between the two protruding sides, the length of the transfer rod located on the same axis is reduced during installation by flipping the movable block and keeping it perpendicular to the main rod body. After the main rod body is installed in place, the movable block is flipped again and distributed coaxially with the main rod body. At this time, by rotating the alignment rod, the extension part is used to move the top protrusion, thereby causing the installation rod to rotate and protrude from the bottom end of the main rod body for installation. This solves the problem that traditional transfer rods are inconvenient to adjust and cannot adapt to patients with small openings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the main rod structure provided in an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the overall cross-sectional structure provided for an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the main rod body structure provided in an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the movable block structure provided in an embodiment of the present utility model;

[0023] Figure 6 This is a schematic diagram of the structure when the movable block and the main rod are perpendicular to each other, as provided in an embodiment of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Main rod body; 2. Elastic plate; 3. Movable block; 4. Insert rod; 5. Mounting rod; 6. Alignment rod; 11. Hexagonal protrusion; 12. Protrusion side; 13. Placement groove; 14. Notch; 15. Through hole; 21. Retaining ring; 22. Card part; 31. First card slot; 32. Second card slot; 33. Insertion hole; 34. Anti-slip bevel; 51. Top protrusion; 52. Mounting thread; 61. Extension part. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] Please see Figure 1-6 This utility model provides a technical solution, including the following embodiments:

[0028] Example 1

[0029] Combination Figure 1 , Figure 2 and Figure 3This embodiment, based on the traditional one-piece impression transfer rod, adds an adjustable component to switch between two states, thereby adapting to patients with smaller mouth openings.

[0030] Specifically, the protruding side 12 and the main rod body 1 are an integral structure. Because the outer wall of the mounting rod 5 near its bottom end has mounting threads 52, therefore... Figure 3 As shown, the top of the implant a has an internal hexagonal groove b, and the inner wall of the internal hexagonal groove b has a fixing threaded hole c. Since the bottom end of the main rod 1 has an internal hexagonal protrusion 11, after the implant a is implanted into the patient's root, the movable block 3 is first flipped and kept perpendicular to the main rod 1, and then the main rod 1 is moved so that the internal hexagonal protrusion 11 on the main rod 1 is inserted into the internal hexagonal groove b, so as to complete the initial connection and alignment of the main rod 1 and the implant a. By using the movable block 3 and the main rod 1 to keep them perpendicular to each other, the length of the transfer rod located on the same axis is reduced, which is convenient for patients with small openings. After the main rod 1 is inserted into place, the movable block 3 is flipped again to make the movable block 3 and the main rod 1 coaxially distributed, and the extension part 61 is flipped between the two top protrusions 51. At this time, the alignment rod 6 is rotated with an Allen wrench to move the top protrusions 51 with the extension part 61, thereby causing the mounting rod 5 to rotate and protrude from the bottom end of the main rod 1, and the mounting thread 52 and the fixing threaded hole c rotate to fix the mounting rod 5 on the implant a. At this time, the main rod 1 can be stably fixed on the implant a, thereby solving the problem that the traditional transfer rod is inconvenient to adjust and cannot be adapted to patients with small openings.

[0031] Example 2

[0032] Combination Figure 3 , Figure 5 This embodiment, based on Embodiment 1, focuses on adding a locking function for the flipping angle of the movable block 3 to ensure its stability in its working posture. Its structural relationship can be found in [reference needed]. Figure 1 , Figure 3 , Figure 4 and Figure 5 .

[0033] Specifically, elastic sheets 2 are respectively provided on the two protruding sides 12. The elastic sheets 2 are medical-grade elastic stainless steel sheets, and card portions 22 are symmetrically stamped on one side. On the outer wall of the movable block 3, two mutually perpendicularly distributed first slots 31 and second slots 32 are formed. When the movable block 3 is flipped relative to the main rod 1, the card portions 22 can selectively engage with the first slot 31 or the second slot 32.

[0034] When it is necessary to make the movable block 3 and the main rod 1 coaxial, the movable block 3 is flipped until the card part 22 is engaged in the first slot 31 under the elastic force of the elastic piece 2, achieving reliable locking and preventing the movable block 3 from accidentally deflecting during subsequent operations or mold removal. When it is necessary to store it to reduce vertical space, external force is applied again to flip the movable block 3 until it is perpendicular to the main rod 1. At this time, the card part 22 is engaged in the second slot 32, achieving a stable positioning of the two in a relatively perpendicular state. The state can be referenced. Figure 6 .

[0035] Example 3

[0036] Combination Figure 1 , Figure 2 and Figure 3 This embodiment allows for easy disassembly of the elastic sheet 2 and the movable block 3, thereby facilitating subsequent disassembly, cleaning, or replacement of components.

[0037] Specifically, a retaining ring 21 is integrally formed on the elastic sheet 2. The main rod body 1 has interconnected placement grooves 13 and notches 14, and the inner wall of the placement groove 13 has a through hole 15.

[0038] Furthermore, during assembly, the root of the elastic piece 2 is inserted into the notch 14, allowing the retaining ring 21 to be accommodated in the placement groove 13, thereby reliably fixing the elastic piece 2 to the protruding side 12. At this time, the clip part 22 is located within the notch 14. This structure is simple and easy to assemble and disassemble. Simultaneously, the two insert rods 4 are threaded onto the protruding side 12. By further threading the insert rods 4, they disengage from the insertion holes 33 on the movable block 3, facilitating quick disassembly, maintenance, or replacement of the movable block 3.

[0039] Example 4

[0040] Combination Figure 1 , Figure 2 and Figure 3 This embodiment facilitates the operation of the transfer rod. Based on any of the above embodiments, this embodiment optimizes operational details, improving the convenience of clinical operation. The improvements involve the following overall structure: Figure 1 As shown.

[0041] Specifically, anti-slip slits 34 are symmetrically provided on both sides of the movable block 3, such as... Figure 5 As shown. The anti-slip notch 34 provides a good point of force application, allowing the dentist to more easily and accurately grasp and rotate the movable block 3 with tweezers or fingers, effectively preventing slippage, especially when operating with gloves. Meanwhile, the tip of the alignment rod 6 can be fitted with a universal wrench interface such as an internal hexagonal, Phillips head, or Torx socket. This allows the dentist to use a standard dental wrench to rotate the alignment rod 6, thereby driving the installation rod 5 to screw into the implant a via the extension 61. The transmission relationship can be found in [reference needed]. Figure 3The operation is more standardized and labor-saving, avoiding damage to components caused by improper force application.

[0042] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An adjustable impression transfer rod for dental implants, characterized in that, The device includes a main rod body (1) and symmetrically arranged protruding sides (12) on its top. A movable block (3) is hinged between the two protruding sides (12). An installation rod (5) is rotatably arranged on the internal thread of the main rod body (1), and the bottom end of the installation rod (5) and the bottom end of the main rod body (1) are located on the same horizontal plane. An alignment rod (6) is rotatably arranged on the movable block (3), and the extension part (61) provided at the bottom end of the alignment rod (6) is movably arranged between the top protrusions (51) symmetrically arranged on the top of the installation rod (5).

2. The adjustable impression transfer rod for dental implants according to claim 1, characterized in that, Two protruding sides (12) are respectively threaded and rotatably provided with insert rods (4), and one end of the insert rods (4) is respectively movably disposed in the insertion holes (33) opened on the opposite outer walls of the movable block (3).

3. The adjustable impression transfer rod for dental implants according to claim 1, characterized in that, An elastic sheet (2) is provided on the protruding side (12), and a card part (22) is symmetrically provided on one side of the elastic sheet (2). The card part (22) is movably disposed in two mutually perpendicularly distributed first card slot (31) and second card slot (32) opened on the outer wall of the movable block (3).

4. An adjustable impression transfer rod for dental implants according to claim 3, characterized in that, The elastic sheet (2) is provided with a retaining ring (21), and the main rod (1) is provided with a placement groove (13) and a notch (14) that are interconnected. The inner wall of the placement groove (13) is provided with a through hole (15), and the retaining ring (21) is movably disposed in the placement groove (13).

5. An adjustable impression transfer rod for dental implants according to claim 1, characterized in that, The movable block (3) has anti-slip slits (34) symmetrically arranged on both sides.

6. An adjustable impression transfer rod for dental implants according to claim 1, characterized in that, The mounting rod (5) has mounting threads (52) on its outer wall near the bottom end.

7. An adjustable impression transfer rod for dental implants according to claim 4, characterized in that, The elastic sheet (2) is a medical-grade elastic stainless steel sheet.

8. An adjustable impression transfer rod for dental implants according to claim 1, characterized in that, The alignment rod (6) is a medical stainless steel rod.

9. An adjustable impression transfer rod for dental implants according to claim 1, characterized in that, The mounting rod (5) is a medical stainless steel rod.

10. An adjustable impression transfer rod for dental implants according to claim 1, characterized in that, The bottom end of the main rod (1) is provided with an internal hexagonal protrusion (11).

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