Fabrication and installation of a dental implant

• US 10,299,895 B2
• Filed: 09/09/2010
• Issued: 05/28/2019
• Est. Priority Date: 09/09/2010
• Status: Active Grant

• Current Assignee: Hankookin Inc.
• Original Assignee: Hankookin Inc.
• Inventors: Chun, James Jiwen, Chun, Angela Soyoung, Chun, Andrew Youngho, Chun, Jennifer Miseong
• Primary Examiner(s): Eide, Heidi M
• Assistant Examiner(s): Aponte, Mirayda A
• Application Number:
  US12/878,039
• Publication Number:
  US 20120064485A1
• Time in Patent Office: 3,183 Days
• Field of Search: 433169, 433172-175, 433177, 606 73
• CPC Class Codes: A61C 2008/0046 Textured surface, e.g. roughness, microstructure A61C8/0013 takes precedence
• CPC Class Codes: A61C 8/0033 Expandable implants; Implants with extendable elements
• CPC Class Codes: A61C 8/0036 Tooth replica

Abstract

A dental implant for supporting periodontal tissue and the supporting bone is provided. The dental implant includes an implant member for insertion into a periodontal bone socket, and an anchoring assembly. The anchoring assembly includes a fastening element and radially equidistant cylindrical members. The fastening element engages the implant member within the hollow axial cavity. The root section includes through-holes for radially and forcibly sliding the cylindrical members through them. When the fastening element apically advances within the hollow axial cavity, the cylindrical members generate an anchoring force to anchor the dental implant.

Claims

1. A dental implant, comprising:

an implant member adapted for insertion into a periodontal bone socket of an extracted natural tooth, said implant member comprising a coronal section and a root section comprising a coronal end and a conical apical end, said coronal section axially extending from said coronal end of said root section, said implant member further comprising;

a plurality of concentric retentive grooves disposed along an outer surface of a mid-portion of said root section, wherein adjacent retentive grooves define ridges formed therebetween;

a plurality of hook-shaped micro-extensions integrally formed on a circumference of each of said ridges in said mid-portion of said root section, wherein each of said hook-shaped micro-extensions are bent upwards, wherein each of said hook-shaped micro-extensions are about 300 microns in length, about 100 microns in width, and about 60 microns in height, and wherein said hook-shaped micro-extensions are configured to impede coronal movement of an inserted implant member within said periodontal bone socket;

an anchoring assembly positioned within a hollow axial cavity of said implant member, said anchoring assembly comprising;

a fastening element engaged with said implant member, said fastening element positioned within said hollow axial cavity, wherein said fastening element comprises an apical section comprising a conical shaft and a truncated end, wherein said fastening element is threaded to screwably engage said hollow axial cavity of said implant member, wherein said fastening element further comprises a coronal screw head for one of tightening and releasing said fastening element within said hollow axial cavity, and wherein said fastening element apically advances within said hollow axial cavity when said fastening element is tightened by turning said coronal screw head; and

one or more radial and equidistant cylindrical members positioned in said mid-portion of said root section, wherein said mid-portion of said root section of said implant member further comprises one or more through-holes for radially and forcibly sliding said cylindrical members through said one or more through-holes, wherein each of said cylindrical members comprises a first end that interfaces with said conical shaft of said fastening element, and a second end that abuts against an inner wall of said periodontal bone socket without penetrating said inner wall of said periodontal bone socket, wherein said conical shaft of said fastening element radially and outwardly pushes said cylindrical members through said through-holes when said fastening element is apically advanced within said hollow axial cavity, and wherein said second end of each of said cylindrical members evenly presses against said inner wall of said periodontal bone socket to generate an anchoring force to anchor said implant member within said periodontal bone socket.

2. The dental implant of claim 1, wherein said fastening element enables a dentist to control said anchoring force generated by said cylindrical members using said coronal screw head of said fastening element, and wherein said anchoring force is controlled based on a pre-determined anchoring force determined by a digital simulator.

3. The dental implant of claim 1, wherein the root section comprises one or more longitudinal grooves extending from said mid-portion of the root section to the conical apical end, and wherein said one or more longitudinal grooves are parallel to said periodontal bone socket for allowing debris to escape out of said periodontal bone socket during said insertion of said implant member within said periodontal bone socket.

4. The dental implant of claim 1, wherein said outer surface is a sandblasted micro-textured surface, wherein said retentive grooves are located along said mid-portion of said root section of said implant member, and wherein said retentive grooves increase contact area between said implant member and said surface of said periodontal bone socket.

5. The dental implant of claim 1, further comprising a composite packing disposed on a coronal surface of said coronal section of said implant member, wherein said composite packing is filled with tooth filling composite materials, wherein said composite packing avoids direct contact of said implant member with opposing teeth to reduce para-functional interferences during an osseointegration period.

6. The dental implant of claim 1, wherein said inner wall of said periodontal bone socket and an outer surface of said implant member define an interstitial space therebetween after said insertion of said implant member within said periodontal bone socket, wherein said interstitial space is filled with one or more of a bone filler material, an osteogenic material, and antibiotic agents to ensure bone regeneration and long term stability of said dental implant.

7. The dental implant of claim 1, wherein said inserted implant member is loaded with a permanent crown after an osseointegration period.

8. A dental implant comprising a plurality of implant members adapted for insertion into a multi-rooted periodontal bone socket, each of said plurality of implant members adapted for insertion into a corresponding root socket, each of said plurality of implant members comprising:

a coronal section and a root section comprising a coronal end and a conical apical end, said coronal section axially extending from said coronal end of said root section, said implant member further comprising;

a plurality of concentric retentive grooves disposed along an outer surface of a mid-portion of said root section, wherein adjacent retentive grooves define ridges formed therebetween;

a plurality of hook-shaped micro-extensions integrally formed on a circumference of each of said ridges in said mid-portion of said root section, wherein each of said hook-shaped micro-extensions are bent upwards, wherein each of said hook-shaped micro-extensions are about 300 microns in length, about 100 microns in width, and about 60 microns in height, and wherein said hook-shaped micro-extensions are configured to impede coronal movement of an inserted implant member within said periodontal bone socket;

an anchoring assembly positioned within a hollow axial cavity of said implant member, said anchoring assembly comprising;

a fastening element engaged with said implant member, said fastening element positioned within said hollow axial cavity, wherein said fastening element comprises an apical section comprising a conical shaft and a truncated end, wherein said fastening element is threaded to screwably engage said hollow axial cavity of said implant member, wherein said fastening element further comprises a coronal screw head for one of tightening and releasing said fastening element within said hollow axial cavity, and wherein said fastening element apically advances within said hollow axial cavity when said fastening element is tightened by turning said coronal screw head; and

one or more radial and equidistant cylindrical members positioned in said mid-portion of said root section, wherein said mid-portion of said root section of said implant member further comprises one or more through-holes for radially and forcibly sliding said cylindrical members through said one or more through-holes, wherein each of said cylindrical members comprises a first end that interfaces with said conical shaft of said fastening element, and a second end that abuts against an inner wall of said periodontal bone socket without penetrating said inner wall of said periodontal bone socket, wherein said conical shaft of said fastening element radially and outwardly pushes said cylindrical members through said through-holes when said fastening element is apically advanced within said hollow axial cavity, and wherein said second end of each of said cylindrical members evenly presses against said inner wall of said periodontal bone socket to generate an anchoring force to anchor said implant member within said periodontal bone socket.

9. A system for fabricating and installing a dental implant in a periodontal bone socket, said system comprising:

a three dimensional X-ray imaging device for capturing high resolution three dimensional X-ray images of a natural tooth and said periodontal bone socket of said natural tooth, before extraction of said natural tooth, wherein said three dimensional X-ray imaging device has a resolution of at least 30 microns per pixel;

a fabricator comprising;

a computer aided design and computer aided manufacturing (CAD/CAM) milling machine for designing and milling said dental implant by using said captured high resolution three dimensional X-ray images, said CAD/CAM milling machine configured to;

design said dental implant to maintain a distance of at least 1000microns between said dental implant and one or more of an adjacent nerve canal, an adjacent sinus, and an adjacent blood vessel;

design said dental implant to maintain an interstitial space of at least 30 microns between a coronal end of a root section of said dental implant and said periodontal bone socket, an interstitial space of at least 30 microns between an apical end of said root section of said dental implant and said periodontal bone socket, and an interstitial space of at least 90 microns between a mid-portion of said root section of said dental implant and said periodontal bone socket; and

fabricate and mill said designed dental implant, wherein said CAD/CAM milling machine is further configured for creating a plurality of concentric retentive grooves along an outer surface of said mid-portion of said root section of said designed dental implant, wherein adjacent grooves define ridges formed therebetween, wherein a plurality of hook-shaped micro-extensions are integrally formed on a circumference of each of said ridges, wherein each of said hook-shaped micro-extensions are bent upwards, and wherein each of said hook-shaped micro-extensions are about 300 microns in length, about 100 microns in width, and about 60 microns in height;

a digital simulator for digitally simulating insertion of said designed dental implant into said periodontal bone socket using said three dimensional X-ray images to establish a path for inserting said designed dental implant; and

said digital simulator further configured for predetermining an anchoring force required for anchoring said designed dental implant within said periodontal bone socket.

10. A method for fabricating and installing a dental implant and restoration for a patient, comprising:

capturing high resolution three dimensional X-ray images of said natural tooth and said periodontal bone socket of said natural tooth using a three dimensional X-ray imaging device, before extraction of said natural tooth;

designing and fabricating said dental implant based on said captured high resolution three dimensional X-ray images, using a fabricator;

digitally simulating insertion of said designed dental implant into said periodontal bone socket, using a digital simulator based on said captured three dimensional X-ray images;

pre-determining an anchoring force for anchoring said designed dental implant to an inner wall of said periodontal socket, by said digital simulator, based on said captured three dimensional X-ray images;

extracting said natural tooth and installing said fabricated dental implant into said periodontal bone socket, wherein a plurality of hook-shaped micro-extensions integrally formed in a mid-portion of a root section of said fabricated dental implant help in guiding said dental implant into said periodontal bone socket and impede coronal movement of said inserted dental implant within said periodontal bone socket;

anchoring said inserted dental implant within said periodontal bone socket, wherein a plurality of radial and equidistant cylindrical members disposed in said mid-portion of said root section of said fabricated dental implant abut and evenly press against said inner wall of said periodontal bone socket, wherein said anchoring force between said plurality of radial and equidistant cylindrical members and said inner wall of said periodontal bone socket is set to said pre-determined anchoring force;

filling an interstitial space between said inserted dental implant and said periodontal bone socket with one or more of a bone filler material, an osteogenic material, and antibiotic agents, to ensure bone regeneration and long term stability of said dental implant;

filling a coronal surface of a coronal section of said dental implant with tooth filling composite materials for osseointegration of said dental implant; and

loading a permanent crown and/or one or more pre-fabricated tooth colored layers after completion of said osseointegration.