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KR-102964674-B1 - Adjustable Angle Abutment Assembly For Denture

KR102964674B1KR 102964674 B1KR102964674 B1KR 102964674B1KR-102964674-B1

Abstract

The angle-adjustable abutment assembly for a denture according to the present invention comprises: a lower body having a first screw portion on its outer surface to be inserted into and coupled to a fixture; an upper body screw-coupled to the upper side of the lower body and having a first through hole penetrating vertically, wherein the upper inner side of the first through hole has a first spherical surface formed based on a center point formed on the center axis of the first through hole, and the upper outer side has a second spherical surface formed based on the center point; a rotating body inserted into the first through hole, having a second screw portion formed along a second through hole formed along the center axis, a third spherical surface formed on its side that can make surface contact with the first spherical surface, and having a flat upper surface and a flat lower surface with an area larger than the upper surface in a plane parallel to the upper surface; and a screw body having a head portion and a third screw portion formed to be coupled to the second screw portion. It is characterized by comprising: a cylindrical coupling part comprising: a partition wall portion formed through along a central axis and having a third through hole having a diameter through which the third screw portion passes and through which the head portion does not pass; an upper side wall formed extending upward from the partition wall portion and having a fourth screw portion formed on its outer surface; and a lower side wall formed extending downward from the partition wall portion and having a contact portion that contacts the second spherical surface.

Inventors

  • 박동한

Dates

Publication Date
20260512
Application Date
20241217

Claims (4)

  1. A lower body (221) having a first screw portion (221-1) on its outer surface to be inserted into and coupled to a fixture (210); It is screw-coupled to the upper side of the lower body (221), It is provided with a first through hole (222-1) that penetrates vertically, and the upper inner surface of the first through hole (222-1) has a first spherical surface (222-2) formed based on a center point formed on the central axis of the first through hole (222-1). The upper body (222) having an outer upper surface formed as a second spherical surface (222-3) based on the center point; A rotating body (223) that is inserted into the first through hole (222-1), has a second screw portion (223-3) formed along a second through hole (223-2) formed along a central axis, has a third spherical surface (223-1) formed on the side that can make surface contact with the first spherical surface (222-2), has an upper surface (223-4) that forms a flat plane, and a lower surface (223-5) that has a larger area than the upper surface (223-4) in a plane parallel to the upper surface (223-4); A screw body (224) having a head portion (224-2) and a third screw portion (224-1) coupled to the second screw portion (223-3) is formed; A partition (225-2) formed with a third through hole (225-1) having a diameter through which the third screw portion (224-1) passes and the head portion (224-2) cannot pass, and An upper side wall (225-3) formed by extending upward from the above bulkhead (225-2) and having a fourth screw portion formed on its outer surface, and An angle-adjustable denture abutment assembly characterized by comprising: a cylindrical connecting part (225) formed by a lower side wall (225-4) that extends downward from the above partition part (225-2) and has a contact part that contacts the second spherical surface (222-3).
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  3. In Article 1, An angle-adjustable abutment assembly for dentures characterized in that the rotation angle of the above-mentioned connecting part (225) is ±20 degrees.
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Description

Adjustable Angle Abutment Assembly for Denture The present invention relates to a denture abutment used to fix a denture that is coupled with a fixture embedded in the alveolar bone, and more specifically, to a denture abutment assembly capable of angle adjustment. Generally, there are various procedures to replace natural teeth, but dentures and implants are representative examples. An implant involves embedding a fixture into the alveolar bone to replace a lost tooth root, and then securing an artificial tooth to the fixture. When securing the tooth to the fixture, the artificial tooth is joined with an abutment to anchor it. While implants are primarily used to restore a single or a small number of missing teeth, dentures are typically used when there are many missing teeth. Dentures are detachably attached to the user's gums, allowing them to be removed for cleaning or sleep, and reattached to the gums for use when going out or eating. Conventionally, dentures were attached to the gums using adhesive, but the retention and chewing forces of the dentures were very weak, and since all the chewing force was transmitted to the gums, it caused various types of pain. To solve this, as shown in FIG. 1, the retention force of the denture is reinforced by having two attachments each, each comprising a first fastening part (100) embedded in the bottom surface of the denture (1) and a second fastening part (200) which is an attachment including an abutment (220) that is coupled to a fixture (210) implanted in the alveolar bone of the gum (2). The first fastening part (100) is configured to position an elastic body, such as silicone or rubber, within a space inside a metal housing, and to insert the tip of the second fastening part into the elastic body inside the housing to retain the denture. (See FIG. 1) However, when the first and second fastening parts are combined, the gap between the two fastening parts is very narrow, and since the insertion direction of the second fastening part is determined by the direction of the fixture implanted by the dentist's manual work, it is difficult for the installation directions of both fixtures to be the same, so it is very difficult to combine the two first and second fastening parts on both sides simultaneously into each elastic groove on both sides. In addition, the elastic material inserted between the first and second fastening parts has a problem of reduced durability, such as breaking as the denture is repeatedly inserted and removed. In particular, when chewing food while the durability of such elastic material is reduced, the gum area in contact with the bottom surface of the denture is compressed, causing the shape of the denture to deform. This deformation causes the positions of the first and second fastening parts to become twisted, which also results in the problem of making it more difficult to wear the denture. Another conventional technology involves embedding a second fastening part into the gums, forming a first fastening part in the shape of a through hole formed in the denture, and adopting a bolt that is inserted through the first fastening part and coupled with a screw formed at the tip of the second fastening part. In this case, two additional first and second fastening parts are formed on both molar sides, resulting in a total of four first and second fastening parts. Even in such cases, the alignment of the first and second fastening parts must be the same, making the implantation of the fixture very difficult. To resolve this, the bolt hole is enlarged to provide leeway in the fastening direction, but this leeway within the denture allows food debris to remain, causing bad breath. However, if the first and second fastening parts are connected by screws, there is a problem in that the wearer cannot directly remove and insert the denture, making it impossible to clean the denture themselves. Whether through screw connection or connection via an elastic body, as more first and second fastening parts are installed, the masticatory force is distributed to the first and second fastening parts, thereby increasing durability and enabling greater masticatory force to be obtained. However, as explained earlier, the directions of the axes where multiple first and second fastening parts are joined must coincide to enable joining. As previously explained, implanting the fixture into the alveolar bone is primarily performed manually by a dentist, and since the direction in which the fixture exerts strong fixation may vary depending on the shape of the gums (alveolar bone), it is almost impossible to consistently maintain multiple first and second fastening parts in the same axial direction. Therefore, a method is required to adjust the direction of the tip of the second fastening part, and Korean registered patent No. 10-1966407 discloses an abutment assembly capable of rotating the tip of the second fastening part. (See FIG. 2) In the above prior art, a method