Device for implanting an artificial endosseous element of ceramics and an implant method for use of the same

• US 4,086,701 A
• Filed: 04/07/1976
• Issued: 05/02/1978
• Est. Priority Date: 04/07/1975
• Status: Expired due to Term

• Current Assignee: Kyoto Ceramic Kabushiki Kaisha
• Original Assignee: Kyoto Ceramic Kabushiki Kaisha
• Inventors: Kawahara, Haruyuki, Hirabayashi, Masaya
• Primary Examiner(s): Peshock, Robert
• Application Number:
  US05/674,688
• Time in Patent Office: 755 Days
• Field of Search: 32/10 A
• US Class Current: 433/174
• CPC Class Codes: A61C 8/00 Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools fastening of peg-teeth in the mouth A61C13/30
• CPC Class Codes: A61C 8/0012 characterised by the material or composition, e.g. ceramics, surface layer, metal alloy use of specific materials A61K6/00
• CPC Class Codes: A61C 8/0022 Self-screwing A61C8/0028 takes precedence

Abstract

This invention is directed to a device for implanting an artificial endosseous element of ceramics in the field of dentistry, oral surgery and orthopedics, comprising an implant screw pin and a flange member or flange members. The present invention provides an implant element which is adapted for uses of prosthesis even in cases where a hole remains after extraction of a tooth or the bone tissues are unhealthy, and presents an implant pin which is adapted to be securely held by means of the flange member to the tissue of the jaw bone. This invention is also directed to an implant method for use of such device.

Claims

1. A device for implanting an artificial endosseous element into a bone tissue consisting of:

an implant screw pin;

a flange member in combination with said pin for securely holding said pin, said pin having external threads on the circumference of a main portion thereof to be screwed directly into the bone tissue, said main portion is adapted to be a main screw portion and being provided with a tool-attaching portion at the top of said main portion;

said flange member being of burnt ceramics and being anchored in association with said pin into a facing shoulder recessed around said pin, said facing shoulder is predeterminately provided in a hard tissue of the bone, thereby holding said pin tightly in said bone tissue.

2. The device according to claim 1 wherein washer-like flange members are coupled to said flange member, said washer-like flange members being of a generally cylindrical and tapered shape and having an insert hole at the center thereof for fixing to said implant pin.

3. The device according to claim 1 wherein a horizontal flange member integral with said pin is adapted for said flange member.

4. The device according to claim 2 wherein said washer-like flange member has a plurality of significant openings of 0.2 - 0.7 mm and preferably 0.3 - 0.5 mm of opening diameter at the surface contacting with the bone tissue enabling penetration of newly grown bone tissue through said flange member and numerous air passages providing link with said significant openings.

5. The device according to claim 3 wherein said implant pin is fabricated by mono-crystalline alumina ceramics.

6. A method of implanting an artificial endosseous element into a bone structure of a human body for restoring said bone structure to its original configuration consisting of:

incising a gingival tissue;

recessing a facing shoulder to receive flange member at a hard tissue of said bone structure;

forming a tapered hole at the center of said facing shoulder in said bone structure;

screwing into said tapered hole a ceramic implant screw pin having external threads on a main portion thereof; and

screwing onto said screw pin a ceramic washer-like flange member formed separate from said pin and having an insert hole provided with threads corresponding to the external threads of said pin in association therewith such that said flange member is anchored into said facing shoulder thereby tightly holding said pin in said bone structure.

7. A device for implanting an artificial endosseous element into a bone structure of a human body for restoring said bone structure to its original configuration consisting of:

an implant screw pin of ceramics;

a ceramic flange member in combination with said pin for securely holding said pin; and

a ceramic nut element,

said implant pin having external threads on the circumference of a main portion thereof to be screwed directly into bone tissue, which main portion is adapted to be a main screw portion and external threads on the circumference of a protruded portion to be protruded from the upper surface of said bone tissue, which protruded portion is adapted, when said pin is screwed in the bone, to be screwed with said nut element, said protruded portion being provided with a tool-attaching portion at the top thereof,

said flange member being anchored in association with said pin into a facing shoulder recessed aorund said pin, which facing shoulder is predeterminately provided in a hard tissue of the bone, and

said nut element being screwed onto said protruded portion of said pin when said implant pin and said flange member are associated.

8. A device for implanting an artificial endosseous element into a bone structure of a human body for restoring said bone structure to its original configuration consisting of:

an implant screw pin of ceramics; and

a ceramic washer-like flange member in combination with said pin but fabricated separate therefrom,

said implant pin having external threads on the circumference of a main portion thereof to be screwed directly into bone tissue, which main portion is adapted to be a main screw portion, a tool-attaching portion at the upper portion of said main portion and a disk-shaped horizontal flange member which is projectably formed horizontally outward on the border circumferences of said main portion and said tool-attaching portion, which disk-shaped horizontal flange member being integral with said main portion and said tool-attaching portion,

said washer-like flange member being of reversed truncated cone tapered with respect to the lower direction thereof, having an insert hole provided with threads at the center of said flange member for screwing with said pin and tool-attaching slots for rotating said washer-like flange member and being anchored in association with said pin, when said implant pin is screwed in the bone, into a deep facing shoulder of smaller diameter which is predeterminately provided at the hard tissue of the bone, and

said horizontal flange member being anchored into a shallow facing shoulder of larger diameter so that the lower surface of said horizontal flange member is in close contact with the upper surface of said washer-like flange member.