Dental impression tray with adjustable edge fitting degree

Abstract

The invention relates to the field of dental impression trays, in particular to a dental impression tray with adjustable edge fitting degree, which comprises a front section, a rear section, a reticular membrane and a tensioning line, the front section and the rear section are coupled through a ratchet wheel binding belt mechanism and jointly define a plane frame; the net-shaped film is fixed in the plane frame, and a plurality of threading holes are formed in the net-shaped film; the tensioning wire penetrates through the plurality of threading holes in a penetrating and bypassing mode and forms a cross traction part, the tensioning wire is provided with two free ends extending to the outer part of the plane frame, and the free ends are configured to respond to external tension so as to reduce the enveloping area of the cross traction part. The front section and the rear section are coupled through the ratchet wheel binding belt mechanism to form the plane frame, so that an operator can reduce the size of the plane frame so as to accurately fit the dental arch of a patient, and meanwhile, a pulling force is applied outwards to pull the free end of the tensioning wire inserted into the threading hole; and the loose net-shaped membrane can be leveled again and recovered to the required prestress state.

Description

Technical Field

[0001] This invention relates to the field of dental impression trays, and more specifically to a dental impression tray with adjustable edge fit. Background Technology

[0002] The related technology of dental impression trays disclosed in this invention is disclosed in: US20250235295A1 Adjustable dental impression tray with self-adaptive lock.

[0003] Current dental impression techniques rely on the use of dental impression trays that match the patient's dental arch anatomy. The inside of the dental impression tray usually has a mesh membrane to support and fix the impression material when the patient bites, thereby capturing the anatomical structure of the upper and lower jaws during the procedure.

[0004] Because each patient's dental arch size and shape vary significantly, the operator must prepare multiple trays of different sizes for trial fitting before treatment. If the tray size is not suitable, not only will the operation need to be repeated, increasing the risk of injury to the patient, but it will also lead to a significant increase in material and time costs.

[0005] Although some adjustable-size dental impression trays have emerged in the prior art (e.g., by physically breaking off the rear section of the tray to reduce its size), once the size or shape of the tray frame changes, the original structural tension of the mesh membrane is disrupted, causing the mesh membrane to loosen or wrinkle and lose its prestress, making it difficult to effectively support the impression material. Summary of the Invention

[0006] The purpose of this invention is to provide a dental impression tray with adjustable edge fit, in order to solve the problem that after the size of the existing dental impression tray is adjusted, the original mesh membrane loses tension and becomes loose or wrinkled, requiring the replacement of the mesh membrane with a matching size.

[0007] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A dental impression tray with adjustable edge fit, comprising: The front section and the rear section, one of which is provided with a strip-shaped insertion part with external serrations, and the other is provided with a guide joint part with internal toothed pawls. The strip-shaped insertion part and the guide joint part are connected to form a ratchet cable tie mechanism. The front section and the rear section are coupled through the ratchet cable tie mechanism and together define a planar frame. A mesh membrane is fixed inside the planar frame and is coplanar with the planar frame. The mesh membrane is provided with a plurality of thread holes. The tensioning wire passes through several of the threading holes in an interlacing manner and forms a cross traction section; The tension line has two free ends extending to the outside of the planar frame, the free ends being configured to reduce the envelope area of ​​the cross traction portion in response to external tension.

[0008] Furthermore, the mesh membrane is fixedly connected to or integrally formed with the front section and the rear section; The tensioning wire remains in a state of interlocking with the threading hole when the strip-shaped insertion part enters the guide joint part.

[0009] Furthermore, several of the threading holes are distributed in a rectangular array on the mesh membrane, and the cross traction section includes two sets of serpentine traction paths symmetrically distributed on the surface of the mesh membrane.

[0010] Furthermore, each of the threading holes is provided with a rigid reinforcing ring at its edge, and the rigid reinforcing ring has a higher hardness than the mesh membrane.

[0011] Furthermore, the strip-shaped insert has a plurality of grooves on the side away from the external serrations, and each groove corresponds to the root position of each external serration in the length direction of the strip-shaped insert.

[0012] Furthermore, the guide connector portion has a non-cylindrical inner cavity, the shape of which matches the outer shape of the strip-shaped insertion portion.

[0013] Furthermore, the front section, the rear section, and the mesh membrane are made of medical-grade thermoplastic polymer material; The tensioning wire has a monofilament fiber structure or a multi-strand fiber structure.

[0014] Furthermore, the mesh membrane is located at the horizontal center of the planar frame.

[0015] Furthermore, the rear section is provided with an operating handle extending away from the front section, and the operating handle is an integral part of the rear section.

[0016] Furthermore, the length of the free end is greater than the width of the planar frame, so that the two free ends can be intertwined to form a knot; or, One of the front section and the rear section is provided with a locking groove, the opening width of which is smaller than the diameter of the tensioning wire, so as to constrain the axial displacement of the tensioning wire by friction.

[0017] Compared with the prior art, this application has the following advantages: This invention uses a ratchet zip-lock mechanism to couple the front and rear sections to form a planar frame. This allows the operator to reduce the size of the planar frame by pushing the strip-shaped insert to precisely fit the patient's dental arch. At the same time, the operator only needs to apply outward pulling force to pull the free end of the tension wire inserted through the thread hole to generate a uniformly distributed mechanical tension on the surface of the mesh membrane, which will flatten the mesh membrane that has loosened due to the reduction in the size of the planar frame and restore it to the required prestress state. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1 This is a perspective view of an embodiment of the present invention before edge fit adjustment; Figure 2 This is a perspective view of the edge fit adjustment in an embodiment of the present invention. Figure 3 This is a perspective view of an embodiment of the present invention after edge fit adjustment; Figure 4 This is a side view before edge fit adjustment according to an embodiment of the present invention; Figure 5 for Figure 4 A cross-sectional view along the AA direction; The labels in the diagram represent the following: 1-Front section; 11-Strip-shaped insertion part; 12-External serrations; 13-Groove; 14-Tooth root; 2-Rear section; 21-Guide joint part; 22-Inner cavity; 23-Operating handle; 24-Threading groove; 3-Mesh membrane; 31-Threading hole; 4-Cross traction part; 41-Tension line; 42-Free end; 43-Knot. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] refer to Figures 1 to 5This embodiment proposes a dental impression tray with adjustable edge fit, comprising: a front section 1, a rear section 2, a mesh membrane 3, and a tension line 41.

[0022] One of the front section 1 and the rear section 2 is provided with a strip-shaped insertion part 11 with external serrations 12, and the other is provided with a guide joint part 21 with internal toothed pawls. The strip-shaped insertion part 11 and the guide joint part 21 are connected to form a ratchet cable tie mechanism. The front section 1 and the rear section 2 are coupled through the ratchet cable tie mechanism and together define a planar frame.

[0023] The mesh membrane 3 is fixed inside the planar frame and is coplanar with the planar frame. The mesh membrane 3 is provided with a plurality of thread holes 31. The tension wire 41 passes through the plurality of thread holes 31 in an interlacing manner and forms a cross traction part 4. The tension wire 41 has two free ends 42 extending to the outside of the planar frame. The free ends 42 are configured to reduce the envelope area of ​​the cross traction part 4 in response to external tension.

[0024] Furthermore, the mesh membrane 3 is fixedly connected to the front section 1 and the rear section 2 or integrally formed; the tension wire 41 maintains its interlocking state with the threading hole 31 when the strip-shaped insertion part 11 enters the guide joint part 21.

[0025] This design aims to enable in-situ operation. The integrated form ensures the reliability of the anchor points at the edge of the mesh membrane 3 when the planar frame is under stress, while the continuous interlocking of the tension line 41 and the thread hole 31 eliminates the need to disassemble or reassemble the mesh membrane 3 throughout the sizing process, thereby eliminating redundant clinical steps and other risks caused by repeated assembly.

[0026] Furthermore, a number of threading holes 31 are distributed in a rectangular array on the mesh membrane 3, and the cross traction section 4 includes two sets of serpentine traction paths that are symmetrically distributed on the surface of the mesh membrane 3.

[0027] The symmetrical serpentine traction path is designed to provide a uniform surface tension distribution. When an external tension is applied to the free end 42, this geometry can convert the local linear tension into tension covering the entire plane of the mesh membrane 3, effectively preventing irregular local wrinkles or structural buckling of the membrane during the tightening process.

[0028] Furthermore, each thread hole 31 is provided with a rigid reinforcing ring at its edge. The rigid reinforcing ring has a higher hardness than the mesh membrane 3. The rigid reinforcing ring is used to resist the local shear stress generated by the tension line 41 during the sliding process, and to prevent the relatively flexible mesh membrane 3 from being cut by the tension line 41 or undergoing plastic tearing deformation, thereby ensuring the structural integrity of the mesh membrane 3.

[0029] Furthermore, the strip-shaped insertion part 11 has a plurality of grooves 13 on the side away from the external serrations 12. In the length direction of the strip-shaped insertion part 11, each groove 13 corresponds to the position of the tooth root 14 of each external serration 12.

[0030] The groove 13 is used to pre-distribute stress concentration points on the back side of the strip-shaped insertion part 11. When the size of the planar frame is reduced, a transverse load is applied to the excess strip-shaped insertion part 11 protruding outside the guide joint part 21, which can cause it to fracture brittlely along the groove 13 closest to the guide joint part 21. This not only facilitates the quick removal of materials, but also ensures that the fracture surface is flush and avoids leaving sharp edges that could cause soft tissue damage.

[0031] Furthermore, the guide connector portion 21 has a non-cylindrical inner cavity 22, the inner wall shape of which matches the outer shape of the strip-shaped insertion portion 11.

[0032] The non-cylindrical inner cavity 22 is used to prevent the strip-shaped insertion part 11 from axially twisting inside the guide connector part 21, thus ensuring the overall geometric stability of the dental impression tray when it is reduced in size or subjected to dynamic occlusal forces.

[0033] Furthermore, the front section 1, the rear section 2, and the mesh membrane 3 are made of medical-grade thermoplastic polymer material; the tension line 41 is a monofilament fiber structure or a multi-strand fiber structure.

[0034] Furthermore, the dental impression tray has a double-arch impression tray structure, with the mesh membrane 3 located at the horizontal center of the planar frame.

[0035] Furthermore, the rear section 2 is provided with an operating handle 23 extending away from the front section 1, and the operating handle 23 is an integral part of the rear section 2.

[0036] Furthermore, the length of the free end 42 is greater than the width of the planar frame so that the two free ends 42 can be intertwined to form a knot 43; or, one of the front section 1 and the rear section 2 is provided with a locking groove 24, the opening width of the locking groove 24 being smaller than the diameter of the tension line 41, so as to constrain the axial displacement of the tension line 41 by friction.

[0037] This design aims to provide reliable mechanical limiting and anchoring. Through the topological interlocking formed by the knotting of the wires, or through the frictional resistance provided by the locking groove 24, the tensioning wire 41 can effectively resist the elastic restoring force generated after the mesh membrane 3 is stretched, ensuring that the tensioning wire 41 remains locked after the external tension is removed, thereby maintaining the tension effect of the mesh membrane 3 for a long time.

[0038] The usage process of this embodiment includes the following steps: Step 1, refer to Figure 1 and Figure 2The planar frame defined by the front section 1 and the rear section 2 is at its maximum size. The operator applies pressure to push the strip-shaped insert 11 into the inner cavity 22 of the guide connector 21. The external serrations 12 pass over the internal tooth pawl and generate unidirectional displacement. The area of ​​the planar frame shrinks accordingly to fit the target dental arch shape. At the end of this stage, the originally flat mesh membrane 3 becomes loose due to the reduction in the outline size of the planar frame.

[0039] Step 2, refer to Figure 3 , Figure 4 and Figure 5 The operator applies a pulling force to the outside to pull the two free ends 42 of the tension line 41. The tension line 41 slides continuously between the thread holes 31, forcing the envelope area of ​​the cross traction part 4 to shrink. This action generates a uniformly distributed tension, which flattens the relaxed mesh membrane 3 again, restoring it to the required prestressed surface state.

[0040] Step 3, refer to Figure 3 While maintaining external tension, the operator mechanically ties the two free ends 42 together, or presses the tension line 41 into the corresponding locking groove 24 to lock the current axial position of the tension line 41, thereby stabilizing the tension of the mesh membrane 3.

[0041] Step 4, refer to Figure 5 A breaking force is applied to the excess strip-shaped insertion portion 11 that penetrates to the outside of the guide connector portion 21, causing it to break along a specific groove 13, thereby separating and removing the sharp tail end of the strip-shaped insertion portion 11.

[0042] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of the embodiments of the present invention.

Claims

1. A dental impression tray with adjustable edge fit, characterized in that, include: The front section (1) and the rear section (2) are provided with a strip-shaped insertion part (11) with external serrations (12) and a guide joint part (21) with internal toothed pawls. The strip-shaped insertion part (11) and the guide joint part (21) are connected to form a ratchet cable tie mechanism. The front section (1) and the rear section (2) are coupled through the ratchet cable tie mechanism and together define a planar frame. Mesh membrane (3), the mesh membrane (3) is fixed inside the planar frame and is coplanar with the planar frame, and the mesh membrane (3) is provided with a plurality of thread holes (31). The tension line (41) passes through several thread holes (31) in an interlacing manner and forms a cross traction section (4). The tension line (41) has two free ends (42) extending to the outside of the planar frame, the free ends (42) being configured to reduce the envelope area of ​​the cross traction section (4) in response to external tension.

2. The dental impression tray according to claim 1, characterized in that, The mesh membrane (3) is fixedly connected to the front section (1) and the rear section (2) or integrally formed; The tensioning wire (41) remains in a state of interlocking with the threading hole (31) when the strip-shaped insertion part (11) enters the guide joint part (21).

3. The dental impression tray according to claim 1, characterized in that, A plurality of the threading holes (31) are arranged in a rectangular array on the mesh membrane (3), and the cross traction part (4) includes two sets of serpentine traction paths symmetrically distributed on the surface of the mesh membrane (3).

4. The dental impression tray according to claim 1, characterized in that, Each of the threading holes (31) is provided with a rigid reinforcing ring at its edge, the rigid reinforcing ring having a higher hardness than the mesh membrane (3).

5. The dental impression tray according to claim 1, characterized in that, The strip-shaped insert (11) has a plurality of grooves (13) on the side away from the external serrations (12). In the length direction of the strip-shaped insert (11), each groove (13) corresponds to the position of the tooth root (14) of each external serration (12).

6. The dental impression tray according to claim 1, characterized in that, The guide connector (21) has a non-cylindrical inner cavity (22), the inner wall shape of which matches the outer shape of the strip-shaped insert (11).

7. The dental impression tray according to claim 1, characterized in that, The front section (1), the rear section (2), and the mesh membrane (3) are made of medical-grade thermoplastic polymer material; The tensioning wire (41) has a monofilament fiber structure or a multi-strand fiber structure.

8. The dental impression tray according to claim 1, characterized in that, The mesh membrane (3) is located at the horizontal center of the planar frame.

9. The dental impression tray according to claim 1, characterized in that, The rear section (2) is provided with an operating handle (23) extending away from the front section (1), and the operating handle (23) and the rear section (2) are integral parts.

10. The dental impression tray according to claim 1, characterized in that, The length of the free end (42) is greater than the width of the planar frame so that the two free ends (42) can be intertwined and form a knot (43). or, One of the front section (1) and the rear section (2) is provided with a locking groove (24), the opening width of which is smaller than the diameter of the tension line (41) so as to constrain the axial displacement of the tension line (41) by friction.

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