WO1992016157A1 - Tige de canal radiculaire - Google Patents

Tige de canal radiculaire Download PDF

Info

Publication number
WO1992016157A1
WO1992016157A1 PCT/SE1992/000170 SE9200170W WO9216157A1 WO 1992016157 A1 WO1992016157 A1 WO 1992016157A1 SE 9200170 W SE9200170 W SE 9200170W WO 9216157 A1 WO9216157 A1 WO 9216157A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel pin
root channel
root
pin
bore
Prior art date
Application number
PCT/SE1992/000170
Other languages
English (en)
Inventor
Lars Hansson
Original Assignee
Lars Hansson
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 Lars Hansson filed Critical Lars Hansson
Priority to JP4506576A priority Critical patent/JPH06505899A/ja
Publication of WO1992016157A1 publication Critical patent/WO1992016157A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/225—Fastening prostheses in the mouth
    • A61C13/30—Fastening of peg-teeth in the mouth

Definitions

  • the present invention relates to a root channel pin of the type which is intended to be secured in a tooth and carry, at its cervical end, a column with a crown.
  • Root channel pins of the type intimated by way of introduction are previously known in the art.
  • such pins are sold in standardized sizes by Whaledent Scandinavia under the brand name Para Post.
  • These root channel pins have a substantially cylindrical circumferential surface and are produced 1 5 from a suitable alloy in the form of a solid rod which is cemented in place in a tooth prepared for this purpose and which, at its cervical end, serves as a mounting for that column of metal on which the crown of the dental prosthesis is subsequently cemented in place.
  • the treating dental surgeon has no possibility to check afterwards how far the root channel pin extends into the column, for which reason the mechanical strength of the bond between the root channel pin and the column is unknown and, hence, may constitute a risk element.
  • the present invention has for its object to devise the root channel pin intimated by way of introduction so that, with retained (or possibly even improved) mechanical strength, inspection may readily be effected of the penetration depth of the root channel pin into the column and, above all, so that a root channel pin cemented in place can be removed (drilled out) without manifest risk of damage to the surrounding dentin.
  • the root channel pin intimated by way of introduction is characterized in that it has a longitudinal bore.
  • the major advantage will be afforded that the penetration depth of the root channel pin into the column can readily be checked by insertion of a suitable probe into the bore of the root channel pin. Furthermore, this bore will function as an excellent guide if the need were to arise for drilling out the root channel pin from a tooth. If the bore is centrally placed, mechanical strength will not be impaired.
  • root channel pin is also given one or more of the characterizing features as set forth in append Claims 2 to 6.
  • Fig. 1 is a schematic cross section through a portion of a jawbone with a damaged tooth located therein, the tooth having been fitted with a dental prosthesis employing a root channel pin according to the present invention
  • Fig. 2 is a longitudinal, diametric section through one embodiment of the root channel pin according to the present invention.
  • reference numeral 1 refers to a crown on a dental prosthesis, the crown being secured on a column 2 which, in its turn, is cast on a root channel pin 3.
  • the root channel pin 3 is secured in the dental root 4 in a cylindrical bore therein by the employment of a suitable cement.
  • the dental root 4 has a root filling 5 which may be effected in a conventional manner by the employment of gutta-percha as a filler material.
  • the jawbone surrounding the dental root 4 has been given reference numeral 6, and the gum reference numeral 7.
  • Fig. 1 a preparation has been carried out in the cervical region of the tooth, implying that the cylindrical bore intended for accommodating the root channel pin 3 has been given a gently arched and approximately funnel-shaped mouth portion 8 so that thereby the transition region between the column 2 and the root channel pin 3 proper may be made correspondingly gently arched so as to avoid indications of fracture. It will also be apparent from the Figure that the root channel pin extends into the column as intimated by broken lines 9.
  • Fig. 2 shows a diametric longitudinal section through a root channel pin 3 as this may appear on delivery, i.e. before the column 2 has been made ready.
  • the root channel pin has a circumferential surface 10 which is substantially cylindrical but has, in relation to the size of the root channel pin 3, a rough surface structure such as a fluting, a gently profiled threading, a helical turn or the like.
  • the surface structure is realized by plastic processing, such as by pressing, rolling or blasting with non-edged or round grained blasting material.
  • a larger blank with a central channel can be rolled or drawn in a drawing die to the correct dimensions and correct surface structure.
  • the root channel pin 3 there is provided a longitudinal channel 11 in the form of a preferably centrally located circular bore which is open at least towards the one end 12 of the root channel pin.
  • the root channel pin may be provided with a head or a flattened portion 13 as intimated in the Figure. The purpose of this flattened portion is int. al. to create space for a dimensional marking of the pin.
  • the root channel pin may be manufactured in continuous lengths which are cut to intended dimensions, for example when being put to use.
  • the surface structure of the wall defining the channel 11 is not realized by cutting but by plastic processing, so that indications of fracture can be eliminated as far as possible.
  • the importance in terms of mechanical strength of the surface structure of the channel surface is, however, less than for the outer surface, since the channel surface is located more proximal the neutral line on flexural loading than the outer surface.
  • the channel 11 is a through channel, since it can then serve as evacuation route for excess cement on securing of the pin.
  • Those diameter dimensions which, in practice, are used on the root channel pin according to the currently relevant type generally lie in the order of magnitude of between 1.5 and 1.75 mm, but may generally vary within the range of between 1.00 and 2.0 mm.
  • the channel 11 In order that the channel 11 be capable of reliably functioning as a guide for a drill in the event that the root channel pin needs to be drilled out of a dental root (where the surrounding dentin is considerably softer than the material in the root channel pin), the channel 11 should have a diameter of the order of magnitude of between 0.25 and 0.5 mm, preferably about 0.3 mm. Possibly, slightly lower values can also be accepted, on condition that the drill employed on drilling out is of correspondingly suitable dimensioning and design.
  • a small diameter (or transverse dimension) of the channel 11 can, in certain specific loadings, possibly improve the strength properties, but above all no quantifiable deterioration of mechanical strength will occur as compared with a solid root channel pin.
  • a certain reduction in the level of strength begins to occur.
  • a prosthesis as shown in Fig. 1 proceeds largely in the following manner, the precondition being that the tooth has, for example, been broken off approximately flush with the arched mouth portion 8 shown on the Drawing.
  • the penetration length of the root channel pin 3 into the column 2 is suitably checked, for example by the employment of an appropriate measurement probe.
  • the root channel pin and the column are cemented in place in the dental root.
  • the surfaces of the dental root are prepared about the periphery of the column 2 so that a gently arched contour is obtained.
  • a new impression is taken of the end surface of the dental root 4 and the column 2 and, on the basis of this impression, the crown 1 is subsequently manufactured, whereafter this is cemented in place.
  • the present invention affords a good possibility of repeating the operation without the dental root 4 needing to run the risk of being damaged.
  • the crown and those parts of the column as required for exposing the the central bore 11 of the root channel pin 3 are ground or drilled away. Thereafter, the root channel pin may simply be drilled out of the dental root, employing the bore 11 as a guide during the drilling operation proper.
  • That damage which may perchance occur in such instance to the dental root 4 is so insignificant that in all probability a new root channel pin of the same diameter can be used, but, as a rule there is also the possibility of somewhat increasing the diameter of the new root channel pin so that, for example, an increase may be effected of from 1.5 to 1.75 mm or possibly from 1,75 to 2 mm.
  • the root channel pin has been disclosed as designed with a substantially cylindrical circumferential surface with an uneven but smooth surface structure in relation to the dimensions of the root channel pin, i.e. a surface structure substantially without indications of fracture.
  • a surface structure substantially without indications of fracture i.e. a surface structure substantially without indications of fracture.
  • the root channel pin there is nothing to prevent the root channel pin from having a slightly conical circumferential surface if desired.
  • the root channel pin need not, naturally, be provided with the head or flattened portion 13 schematically illustrated in the Drawing, but the end located in this position may instead be of a design corresponding to the design of the end 12.
  • the head 13 may also be in the form of a surrounding bead at the end of the pin.
  • the root channel pin may be provided, in its apical end, with a number of surrounding rings or beads with soft contours, the number of rings or beads indicating the relevant dimensions. Such rings or beads (possibly also grooves) may also be given the same function as or be included in the uneven surface structure.
  • root channel pin may be effected according to the present invention, without departing from the spirit and scope of the appended Claims.

Abstract

Une tige de canal radiculaire (3) est conçue pour être fixée dans une dent afin de supporter, à son extrémité cervicale, un pilier muni d'une couronne. La tige de canal radiculaire (3) comporte un alésage central longitudinal (11). La surface périphérique de ladite tige (3) est sensiblement cylindrique (10) et l'alésage est ouvert au moins vers une extrémité (12).
PCT/SE1992/000170 1991-03-19 1992-03-19 Tige de canal radiculaire WO1992016157A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4506576A JPH06505899A (ja) 1991-03-19 1992-03-19 ルートチャンネルピン

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9100827-6 1991-03-19
SE9100827A SE9100827D0 (sv) 1991-03-19 1991-03-19 Rotkanalstift

Publications (1)

Publication Number Publication Date
WO1992016157A1 true WO1992016157A1 (fr) 1992-10-01

Family

ID=20382214

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1992/000170 WO1992016157A1 (fr) 1991-03-19 1992-03-19 Tige de canal radiculaire

Country Status (6)

Country Link
EP (1) EP0576510A1 (fr)
JP (1) JPH06505899A (fr)
AU (1) AU1419692A (fr)
CA (1) CA2106473A1 (fr)
SE (1) SE9100827D0 (fr)
WO (1) WO1992016157A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1925269A1 (fr) * 2006-11-27 2008-05-28 Harald E. Nordin Ensemble d'ancrage de canal de racine dentaire
RU2633528C1 (ru) * 2016-12-27 2017-10-13 Открытое акционерное общество "Научно-производственное объединение Ангстрем" Узел соединения приемопередатчика с батареей

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4253835A (en) * 1979-10-01 1981-03-03 Mike Z. Nemethy Post and sleeve arrangement
US4622012A (en) * 1985-03-27 1986-11-11 Smoler Lewis S Dental post system
DE3611255A1 (de) * 1986-04-04 1987-10-08 Otto Dr Hammeke Hohler metall-stift fuer stiftkronen und stiftaufbauten
EP0336082A2 (fr) * 1988-04-06 1989-10-11 Howard Martin Système de dent à pivot perforée
EP0370676A1 (fr) * 1988-11-16 1990-05-30 Stuart Julian Filhol Equipement dentaire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4253835A (en) * 1979-10-01 1981-03-03 Mike Z. Nemethy Post and sleeve arrangement
US4622012A (en) * 1985-03-27 1986-11-11 Smoler Lewis S Dental post system
DE3611255A1 (de) * 1986-04-04 1987-10-08 Otto Dr Hammeke Hohler metall-stift fuer stiftkronen und stiftaufbauten
EP0336082A2 (fr) * 1988-04-06 1989-10-11 Howard Martin Système de dent à pivot perforée
EP0370676A1 (fr) * 1988-11-16 1990-05-30 Stuart Julian Filhol Equipement dentaire

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1925269A1 (fr) * 2006-11-27 2008-05-28 Harald E. Nordin Ensemble d'ancrage de canal de racine dentaire
US8398403B2 (en) 2006-11-27 2013-03-19 Harald NORDIN Tooth root canal anchorage assembly
RU2633528C1 (ru) * 2016-12-27 2017-10-13 Открытое акционерное общество "Научно-производственное объединение Ангстрем" Узел соединения приемопередатчика с батареей

Also Published As

Publication number Publication date
CA2106473A1 (fr) 1992-09-20
EP0576510A1 (fr) 1994-01-05
AU1419692A (en) 1992-10-21
SE9100827D0 (sv) 1991-03-19
JPH06505899A (ja) 1994-07-07

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