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CN-122005129-A - Dental impression tray with adjustable edge fit degree

CN122005129ACN 122005129 ACN122005129 ACN 122005129ACN-122005129-A

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 net-shaped film and a tensioning wire, wherein the front section and the rear section are coupled through a ratchet ribbon mechanism and jointly define a plane frame, the net-shaped film is fixed inside the plane frame, a plurality of threading holes are formed in the net-shaped film, the tensioning wire penetrates through the threading holes in a penetrating and winding mode and forms a cross traction part, the tensioning wire is provided with two free ends extending to the outside of the plane frame, and the free ends are configured to respond to external pulling force so as to reduce the enveloping area of the cross traction part. The invention couples the front section and the rear section through the ratchet wheel ribbon mechanism to form the planar frame, so that an operator can reduce the size of the planar frame to accurately fit the dental arch of a patient, and simultaneously pull the free end of the tensioning wire inserted into the threading hole by applying a pulling force outwards, so that the loose reticular membrane can be re-leveled and restored to a required prestress state.

Inventors

  • WANG HUI
  • CONG LONGFENG

Assignees

  • 科斗（苏州）脑机科技有限公司
  • 苏州口腔医院(集团)有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. An edge-fit adjustable dental impression tray, comprising: a front section (1) and a rear section (2), one of the front section (1) and the rear section (2) being provided with a strip-shaped insertion portion (11) provided with external serrations (12), the other being provided with a guide joint portion (21) provided with internal tooth pawls, the strip-shaped insertion portion (11) and the guide joint portion (21) being connected to form a ratchet-and-binding mechanism, the front section (1) and the rear section (2) being coupled by the ratchet-and-binding mechanism and together defining a planar frame; The net-shaped film (3), the net-shaped film (3) is fixed in the plane frame and coplanar with the plane frame, and a plurality of threading holes (31) are formed in the net-shaped film (3); a tensioning wire (41), wherein the tensioning wire (41) passes through a plurality of threading holes (31) in a penetrating and winding mode and forms a cross traction part (4); The tensioning wire (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 portion (4) in response to an external pulling force.
  2. 2. The dental impression tray according to claim 1, characterized in that, The reticular membrane (3) is fixedly connected with the front section (1) and the rear section (2) or integrally formed; The tension wire (41) maintains a penetration-fit state with the threading hole (31) in a state that the strip-shaped insertion part (11) enters the guide joint part (21).
  3. 3. The dental impression tray according to claim 1, characterized in that, The threading holes (31) are distributed on the reticular membrane (3) in a rectangular array, and the cross traction part (4) comprises two groups of snake-shaped traction paths which are symmetrically distributed on the surface of the reticular membrane (3).
  4. 4. The dental impression tray according to claim 1, characterized in that, The edge of each threading hole (31) is provided with a rigid reinforcing ring, and the rigidity of the rigid reinforcing ring is higher than that of the reticular membrane (3).
  5. 5. The dental impression tray according to claim 1, characterized in that, One surface of the strip-shaped insertion part (11) far away from the external saw teeth (12) is provided with a plurality of cutting grooves (13), and each cutting groove (13) corresponds to the tooth root (14) of each external saw tooth (12) in the length direction of the strip-shaped insertion part (11).
  6. 6. The dental impression tray according to claim 1, characterized in that, The guide joint part (21) is provided with a non-cylindrical inner cavity (22), and the shape of the inner wall of the inner cavity (22) is matched with the shape of the strip-shaped insertion part (11).
  7. 7. The dental impression tray according to claim 1, characterized in that, The front section (1), the rear section (2) and the reticular membrane (3) are made of medical thermoplastic polymer materials; The tensioning wire (41) is of a monofilament fiber structure or a multi-strand fiber structure.
  8. 8. The dental impression tray according to claim 1, characterized in that, The reticular membrane (3) is positioned at the horizontal center of the plane frame.
  9. 9. The dental impression tray according to claim 1, characterized in that, The rear section (2) is provided with an operating handle (23) extending in a direction away from the front section (1), and the operating handle (23) and the rear section (2) are integrated.
  10. 10. The dental impression tray according to claim 1, characterized in that, The length of the free ends (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 alternatively One of the front section (1) and the rear section (2) is provided with a wire locking groove (24), and an opening width of the wire locking groove (24) is smaller than a diameter of the tensioning wire (41) so as to restrict axial displacement of the tensioning wire (41) by friction force.

Description

Dental impression tray with adjustable edge fit degree Technical Field The invention relates to the field of dental impression trays, in particular to a dental impression tray with adjustable edge fitting degree. Background The related art of dental impression trays to which the presently disclosed subject matter relates is disclosed in US20250235295A1 with an adjustable dental impression tray with an adaptive lock. Current dental impression techniques rely on the use of a dental impression tray that matches the anatomy of the patient's dental arch, the interior of which is typically provided with a layer of mesh membrane for supporting and securing impression material while the patient is biting, thereby capturing the anatomy of the upper and lower jaws in operation. Because of the significant differences in arch size and morphology for each patient, the operator must prepare multiple different size trays for try-on prior to treatment, and if the tray size is not appropriate, not only does repeated handling be required, increasing the risk of patient injury, but also significant increases in material and time costs. Although some adjustable size dental impression trays have been developed in the prior art (e.g., by physically breaking the rear section of the tray to reduce the size), once the size or morphology of the tray frame changes, the original structural tension of the mesh film is destroyed, causing the mesh film to relax or buckle and lose prestressing and thus making it difficult to effectively support the impression material. Disclosure of Invention The invention aims to provide a dental impression tray with adjustable edge fitting degree, which solves the problems that after the size of the existing dental impression tray is adjusted, the original reticular membrane loses tension to generate looseness or wrinkles and the reticular membrane with matched size is required to be replaced. In order to solve the technical problems, the invention specifically provides the following technical scheme: An edge-fit adjustable dental impression tray, comprising: A front section and a rear section, one of the front section and the rear section being provided with a strip-shaped insert portion having external serrations, the other being provided with a guide joint portion having internal teeth pawls, the strip-shaped insert portion and the guide joint portion being connected to form a ratchet strap mechanism, the front section and the rear section being coupled by the ratchet strap mechanism and together defining a planar frame; the net-shaped film is fixed in the plane frame and coplanar with the plane frame, and a plurality of threading holes are formed in the net-shaped film; the tensioning wires penetrate through the threading holes in a penetrating and winding mode and form a cross traction part; the tensioning wire has two free ends extending to the exterior of the planar frame, the free ends being configured to respond to an external pulling force to reduce the envelope area of the cross-traction portion. Further, the reticular membrane is fixedly connected with the front section and the rear section or integrally formed; the tensioning wire keeps the state of penetrating and matching with the threading hole in the state that the strip-shaped inserting part enters the guide joint part. Further, the threading holes are distributed on the reticular membrane in a rectangular array, and the cross traction part comprises two groups of snake-shaped traction paths which are symmetrically distributed on the surface of the reticular membrane. Further, the edge of each threading hole is provided with a rigid reinforcing ring, and the rigidity of the rigid reinforcing ring is higher than that of the reticular membrane. Further, a plurality of cutting grooves are formed in one surface, far away from the external saw teeth, of the strip-shaped insertion portion, and each cutting groove corresponds to the tooth root position of each external saw tooth in the length direction of the strip-shaped insertion portion. Further, the guide joint part is provided with a non-cylindrical inner cavity, and the shape of the inner wall of the inner cavity is matched with the shape of the strip-shaped insertion part. Further, the front section, the rear section and the mesh membrane are medical grade thermoplastic polymer materials; the tensioning wire is of a monofilament fiber structure or a multi-strand fiber structure. Further, the mesh membrane is positioned at the horizontal center of the planar frame. Further, the rear section is provided with an operating handle extending in a direction away from the front section, and the operating handle and the rear section are integrated. Further, the length of the free ends is greater than the width of the planar frame, so that the two free ends can be mutually wound and form a knot; Or alternatively One of the front section and the rear section is provided with a locking groove, an