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KR-20260065338-A - IMPLANT FIXTURE HAVING PROTRUSION ON LOWER SURFACE OF HEAD

KR20260065338AKR 20260065338 AKR20260065338 AKR 20260065338AKR-20260065338-A

Abstract

The present invention relates to an implant fixture, wherein by providing a plurality of radial protrusions on the lower surface of the head portion, the contact area with the alveolar bone after bone formation can be increased to enhance fixation strength, and the conventional problem of the implant fixture detaching due to increased implant removal torque during the prosthesis mounting process is resolved. Additionally, the invention has the effect of reducing the lateral length of the wing by increasing resistance to tearing.

Inventors

  • 최동주
  • 이영만
  • 공윤수
  • 복성철
  • 복소원

Assignees

  • 주식회사 라이프덴토메디칼

Dates

Publication Date
20260508
Application Date
20241101

Claims (6)

  1. A wing-shaped implant fixture comprising a body portion having a screw thread and a head portion having a lateral protrusion length on the upper side of the body portion, An implant fixture characterized by having two or more radial protrusions spaced apart at a certain interval on the lower surface of the head portion.
  2. In Article 1, An implant fixture characterized by the above-mentioned radial protrusion protruding to a height of 0.5 to 10 times the length of the above-mentioned lateral protrusion.
  3. In Article 1, An implant fixture characterized in that the above-mentioned radial protrusion is formed such that a convex surface or an acute-angled inclined surface faces in the same direction as the direction of progression of the screw thread.
  4. In any one of paragraphs 1 to 3, An implant fixture characterized by the above-mentioned radial protrusions being connected to a circular protruding ring.
  5. In Article 4, The above radial protrusions number 4 to 20, and An implant fixture characterized by the height being 0.1 to 1.0 mm.
  6. In Article 4, An implant fixture characterized in that the height of the above-mentioned radial protrusion decreases from the body portion to the lower edge of the head portion.

Description

Implant fixture having a protrusion on the lower surface of the head The present invention relates to an implant fixture, and more specifically, to an implant fixture having a protrusion on the lower surface of the head portion of a wing-shaped implant fixture. An implant is one of the dental procedures that restores tooth function with an artificial tooth by implanting a fixture, typically in the shape of a screw, into the alveolar bone to replace the root of a lost tooth and then placing a crown over it. As implant procedures become more common, a wide variety of implant fixtures are being developed. Implant fixtures developed to date can be broadly classified into separate and integral types. The former features a structure in which an abutment is inserted and secured with a screw; this is further divided into external protrusion type and internal insertion type depending on the shape of the connection point with the abutment. Meanwhile, the wing-shaped implant fixture was developed by the inventor and obtained as Korean registered patent 10-1327655. In order to resolve the problem of conventional implant fixtures that only distribute force to the area implanted in the alveolar bone, a stress-dispersing implant fixture was developed having a head portion that is exposed to the outside of the bone tissue in a wing shape. In addition, to improve the above-mentioned patent invention, the inventor developed an implant fixture having a concave flange for anchoring that ensures a sufficient contact area with the alveolar bone even if the lateral protrusion length of the head portion is short, and registered it as Korean Patent No. 10-1972980. However, there was a problem where the implant fell out of the alveolar bone when the above-mentioned wing-shaped implant fixture was implanted into the alveolar bone and removed by turning a tool such as a hex head driver in the opposite direction. Figure 1 illustrates a typical form of a conventional wing-type implant fixture. Although the fixation force within the bone is increased due to the lateral protrusion of the head portion (20), which is the wing portion, the wing length (L1) is currently used at 0.35 mm, and the key is to reduce it to 0.1 mm. Figure 1 illustrates a typical form of a conventional wing-type implant fixture. FIG. 2 illustrates an embodiment of the present invention having a plurality of radial protrusions compared to FIG. 1. FIG. 3 is a bottom view showing the view from the bottom of the body part of FIG. 2 toward the bottom of the head part, and according to the embodiment, it shows that four straight radial protrusions (a), four curved protrusions (b), and four diagonal protrusions (c) can each be connected to a circular protrusion ring. Figure 4 shows another embodiment of the present invention, in which the height of the radial protrusion can decrease from the body portion to the lower edge of the head portion. Figure 5 illustrates the appearance of removing a wing-shaped implant fixture by turning a hex screwdriver (300) in the opposite direction after implanting it into the alveolar bone. FIG. 6 illustrates the appearance of a hexagonal screwdriver (300) being removed from a wing-shaped implant fixture. Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings. An implant fixture according to one embodiment of the present invention is a wing-shaped implant fixture comprising a body portion (10) having a screw thread (12) formed thereon as referenced in FIGS. 2 and 3, and a head portion (20) having a lateral protrusion length (L2) on the upper end of the body portion, wherein the lower surface (22) of the head portion (20) is provided with two or more radial protrusions (32, 34, 36, 38) spaced apart at a certain interval. Here, the body portion (10) is a part that is implanted and inserted into the alveolar bone. Referring to FIG. 5, the alveolar bone is composed of cortical bone (200) and cancellous bone (100). The former is also called compact bone and has a higher bone density and greater hardness than the latter. The shape of the above body part (10) may be cylindrical, but a wedge shape with a diameter that decreases towards the bottom is preferable as it increases the diameter of the screw fastening part at the top and reduces bone loss. Additionally, the outer surface of the body part (10) may be formed without screw threads, but it is preferable to form screw threads (12) to facilitate implantation and to roughen the surface to increase the speed of fusion with the bone. As shown in FIGS. 1 and 2, it is common for a bone discharge groove (14) to be formed in a part of the tip screw thread (12). According to an embodiment, the radial protrusions (32, 34, 36, 38) may protrude to a height (H1) that is 0.5 to 10 times the lateral protrusion length (L2). As a specific example, when the lateral protrusion length (L2) is 0.1 to 0.15 mm, the height (H1) of the radial protrusions (32