WO2006008344A1 - Fastening element for a tooth implant - Google Patents

Fastening element for a tooth implant Download PDF

Info

Publication number
WO2006008344A1
WO2006008344A1 PCT/FI2005/050282 FI2005050282W WO2006008344A1 WO 2006008344 A1 WO2006008344 A1 WO 2006008344A1 FI 2005050282 W FI2005050282 W FI 2005050282W WO 2006008344 A1 WO2006008344 A1 WO 2006008344A1
Authority
WO
WIPO (PCT)
Prior art keywords
fastening
tooth
root
pin
artificial
Prior art date
Application number
PCT/FI2005/050282
Other languages
French (fr)
Inventor
Urpo Ristola
Original Assignee
Urpo Ristola
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Urpo Ristola filed Critical Urpo Ristola
Publication of WO2006008344A1 publication Critical patent/WO2006008344A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
    • A61C8/0022—Self-screwing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0074—Connecting devices for joining an upper structure with an implant member, e.g. spacers with external threads
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/0075—Implant heads specially designed for receiving an upper structure

Definitions

  • the present invention relates to a fastening element for a tooth implant by means of which a tooth crown can be anchored to the jaw bone, or alternatively which can be used to fix a tooth prothesis or parts thereof in place.
  • Fastening elements for this purpose comprise as their main components an artificial tooth root and a fastening member interlockable therewith.
  • the artificial root is placed into a hole bored into the jaw und anchored by means of a coarse threaded external thread.
  • the artificial tooth root is usually provided with an axial internal bor ⁇ ing which is threaded, hi installing the implant, a fastening pin is screwed into this boring of the artificial root, hi the installed and tightened position of the fastening pin in the artifi ⁇ cial tooth root, the end of the fastening pin protrudes from the artificial root, to which end a tooth crown is anchored, or alternatively which is used as a fastening pin of a tooth prothe- sis.
  • a problem of these fastening elements is that the fastening between the artificial root and the fastening pin will loosen in course of time.
  • An essential reason therefor is that there are at times even considerable temperature variations in the mouth which influence different parts of the fastening element for a toot implant at different times to various ex ⁇ tent.
  • Fig. 1 shows a cross section of a fastening element of a tooth implant according to the invention.
  • a fastening element of a tooth implant shown in Fig. 1 comprises an artificial root 1 which is provided with a suitable external thread 2. By means of this external thread the artificial root is placed into a boring provided in the jaw where it is allowed to anchor and ossify.
  • a fastening pin protrudes from the upper end of the artificial root as a solid part thereof, the outer surface of said fastening pin being provided with grooves 4.
  • the length of the fastening pin 3 is dimensioned so that an essential part of the fastening pin protrudes from the jaw bone.
  • This protruding portion can be machined into a suitable length by taking a tooth or another prothesis to be anchored into consideration. The length adjustment can be carried out prior to the installation of the artificial root or after it has been ossified into the jaw bone.
  • the grooves 4 made in the surface of the fastening pin may be realized in different ways.
  • a preferable way is to provide the fastening pin with a thread.
  • a square thread as that shown in the Figure provides a good fastening base for the cementation of the tooth.
  • the thread enables thorough cleaning of the fastening pin during restoration of the tooth by means of a suitable thread cutter or thread opener.
  • a tooth to be fixed to the implant is cemented to the fastening pin 3 by means of a binder paste 5 in a way known in the art.
  • the upper part of the artificial root 1 is suitably shaped to an upwardly slightly enlarging cone 7.
  • the surface of the artificial root 1 is preferably provided with a slight roughening obtain- able to the metallic surface of the artificial root for instance by sand blasting. Also other roughening procedures known from the metal industry can be used. The roughening con ⁇ tributes to the anchoring and adhesion of the artificial tooth root to the jaw.
  • the construction according to the invention can be produced to be stable. Possible dam- ages may occur either in the tooth 6 or its fastening cementation 5, but the implant itself can be used for fastening a new tooth without a need of any problematic measures at the implant or at any part thereof.
  • the definition "as a solid part" relative to the artificial root 1 and the pin 3 protruding therefrom is firstly meant that said items consists of one and the same blank.
  • the scope of the invention covers naturally also embodiments, where the pin 3 is perma ⁇ nently solidified with the artificial root 1 for instance by soldering of cementing, which is not intended to be dismounted as the thread joints used in prior art.

Abstract

The invention is directed to a fastening element for a tooth implant, comprising an artificial tooth root (1) implantable into a jaw bone by means of an external thread (2). A fastening pin (3) is protruding from the artificial root as a solid part thereof, the pin being provided with grooves (4) at least along a part of the portion protruding from the artificial root.

Description

Fastening element for a tooth implant
The present invention relates to a fastening element for a tooth implant by means of which a tooth crown can be anchored to the jaw bone, or alternatively which can be used to fix a tooth prothesis or parts thereof in place.
Fastening elements for this purpose comprise as their main components an artificial tooth root and a fastening member interlockable therewith. The artificial root is placed into a hole bored into the jaw und anchored by means of a coarse threaded external thread. In known constructions the artificial tooth root is usually provided with an axial internal bor¬ ing which is threaded, hi installing the implant, a fastening pin is screwed into this boring of the artificial root, hi the installed and tightened position of the fastening pin in the artifi¬ cial tooth root, the end of the fastening pin protrudes from the artificial root, to which end a tooth crown is anchored, or alternatively which is used as a fastening pin of a tooth prothe- sis. A problem of these fastening elements is that the fastening between the artificial root and the fastening pin will loosen in course of time. An essential reason therefor is that there are at times even considerable temperature variations in the mouth which influence different parts of the fastening element for a toot implant at different times to various ex¬ tent.
Previous solutions of this problem were based on mutual dimensioning and designing of the threads of the artificial tooth root and the fastening pin to enable such a fastening in the fastening procedure which is capable to resist to dimension changes caused by the tem¬ perature changes in different parts of the fastening element, as described i.a. in US patent specifications 5,607,304, 5,605,457, 5,660,545 and 5,823,777
Although such kind of fastening problems could be reduced to a certain extent by various solutions, the main problem remained unsolved. This main problem lies in the pin to be screwed into an artificial root. On the one hand the pin requires a boring in the artificial root, which boring is to be furnished with a very exactly dimensioned thread, and this causes high manufacturing costs. However, a more essential problem arises in a situation where the pin is broken within the artificial root. The artificial root is implanted into the jaw by ossification and therefore, removing of the root is not preferable. It is, however, very difficult to remove a broken pin of a miniature size from the artificial root, and such attempts will often damage the internal thread in the boring of the artificial root. The only possibility in such a situation is to remove the artificial root. The above mentioned prob- lems can be solved by an implant constructed according to the invention as defined in claim 1.
The invention is described in more detail by referring to the accompanying drawing where
Fig. 1 shows a cross section of a fastening element of a tooth implant according to the invention.
A fastening element of a tooth implant shown in Fig. 1 comprises an artificial root 1 which is provided with a suitable external thread 2. By means of this external thread the artificial root is placed into a boring provided in the jaw where it is allowed to anchor and ossify. A fastening pin protrudes from the upper end of the artificial root as a solid part thereof, the outer surface of said fastening pin being provided with grooves 4. The length of the fastening pin 3 is dimensioned so that an essential part of the fastening pin protrudes from the jaw bone. This protruding portion can be machined into a suitable length by taking a tooth or another prothesis to be anchored into consideration. The length adjustment can be carried out prior to the installation of the artificial root or after it has been ossified into the jaw bone.
The grooves 4 made in the surface of the fastening pin may be realized in different ways. A preferable way is to provide the fastening pin with a thread. A square thread as that shown in the Figure provides a good fastening base for the cementation of the tooth. In addition, the thread enables thorough cleaning of the fastening pin during restoration of the tooth by means of a suitable thread cutter or thread opener.
A tooth to be fixed to the implant is cemented to the fastening pin 3 by means of a binder paste 5 in a way known in the art. In order to install the artificial root at the border of the gum the upper part of the artificial root 1 is suitably shaped to an upwardly slightly enlarging cone 7.
The surface of the artificial root 1 is preferably provided with a slight roughening obtain- able to the metallic surface of the artificial root for instance by sand blasting. Also other roughening procedures known from the metal industry can be used. The roughening con¬ tributes to the anchoring and adhesion of the artificial tooth root to the jaw.
The construction according to the invention can be produced to be stable. Possible dam- ages may occur either in the tooth 6 or its fastening cementation 5, but the implant itself can be used for fastening a new tooth without a need of any problematic measures at the implant or at any part thereof.
In this connection the definition "as a solid part" relative to the artificial root 1 and the pin 3 protruding therefrom is firstly meant that said items consists of one and the same blank. The scope of the invention covers naturally also embodiments, where the pin 3 is perma¬ nently solidified with the artificial root 1 for instance by soldering of cementing, which is not intended to be dismounted as the thread joints used in prior art.

Claims

Claims:
1. A fastening element for a tooth implant, comprising an artificial tooth root (1) implant¬ able into a jaw bone by means of an external thread (2), characterized in that a fastening pin (3) is protruding from the artificial root as a solid part thereof the pin being provided with grooves (4) at least along a part of the portion protruding from the artificial root.
2. The fastening element for a tooth implant according claim 1, characterized in that the grooves (4) have been realized as a threading on the pin (3).
PCT/FI2005/050282 2004-07-23 2005-07-21 Fastening element for a tooth implant WO2006008344A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FIU20040277 2004-07-23
FI20040277 FI6430U1 (en) 2004-07-23 2004-07-23 Hammasimplanttikiinnike

Publications (1)

Publication Number Publication Date
WO2006008344A1 true WO2006008344A1 (en) 2006-01-26

Family

ID=32749131

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2005/050282 WO2006008344A1 (en) 2004-07-23 2005-07-21 Fastening element for a tooth implant

Country Status (2)

Country Link
FI (1) FI6430U1 (en)
WO (1) WO2006008344A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2367740A1 (en) * 2011-07-12 2011-11-08 Dentisel, S.L. Attachment for dental prostheses

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672058A (en) * 1969-04-18 1972-06-27 Albert Jean Nikoghossian Dental implant
WO2003073955A1 (en) * 2002-03-06 2003-09-12 Dawood Andrew J S A fixture for orthodontic anchorage and osseo distraction of the alveolar process, and for the stabilization of temporary prostheses
US6655962B1 (en) * 1999-08-17 2003-12-02 Nobel Biocare Usa, Inc. Immediate provisional implant
WO2005020839A1 (en) * 2003-08-29 2005-03-10 Megagen Corp. Dental implant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672058A (en) * 1969-04-18 1972-06-27 Albert Jean Nikoghossian Dental implant
US6655962B1 (en) * 1999-08-17 2003-12-02 Nobel Biocare Usa, Inc. Immediate provisional implant
WO2003073955A1 (en) * 2002-03-06 2003-09-12 Dawood Andrew J S A fixture for orthodontic anchorage and osseo distraction of the alveolar process, and for the stabilization of temporary prostheses
WO2005020839A1 (en) * 2003-08-29 2005-03-10 Megagen Corp. Dental implant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2367740A1 (en) * 2011-07-12 2011-11-08 Dentisel, S.L. Attachment for dental prostheses
WO2013007856A1 (en) * 2011-07-12 2013-01-17 Dentisel, S.L. Attachment for dental prostheses

Also Published As

Publication number Publication date
FIU20040277U0 (en) 2004-07-23
FI6430U1 (en) 2004-10-27

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