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WO2013004703A1 - Appareil modulaire pour des implants dentaires - Google Patents

Appareil modulaire pour des implants dentaires Download PDF

Info

Publication number
WO2013004703A1
WO2013004703A1 PCT/EP2012/062942 EP2012062942W WO2013004703A1 WO 2013004703 A1 WO2013004703 A1 WO 2013004703A1 EP 2012062942 W EP2012062942 W EP 2012062942W WO 2013004703 A1 WO2013004703 A1 WO 2013004703A1
Authority
WO
WIPO (PCT)
Prior art keywords
implant
conical
stump
section
walls
Prior art date
Application number
PCT/EP2012/062942
Other languages
English (en)
Inventor
Edoardo Maria CALVI
Original Assignee
CALVI, Raffaella
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 CALVI, Raffaella filed Critical CALVI, Raffaella
Publication of WO2013004703A1 publication Critical patent/WO2013004703A1/fr

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
    • A61C8/0048—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
    • 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
    • A61C8/006—Connecting devices for joining an upper structure with an implant member, e.g. spacers with polygonal positional means, e.g. hexagonal or octagonal
    • 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
    • A61C8/0069—Connecting devices for joining an upper structure with an implant member, e.g. spacers tapered or conical connection

Definitions

  • the present patent for industrial invention relates to a modular apparatus for realization of dental implants (prostheses).
  • Dental implants are used in the patient's oral cavity to replace one or more teeth that have fallen out.
  • the dentist inserts a metal pin (technically defined as "implant”) in the patient's bone, which acts as root for the artificial tooth to be installed.
  • a metal pin (technically defined as "implant) in the patient's bone, which acts as root for the artificial tooth to be installed.
  • a metal stem usually defined as “stump” is fixed on it by means of a screw.
  • such a stump is adapted to support the dental prosthesis (the so-called “crown"), i.e. the metal capsule coated with ceramic that reproduces the natural tooth that is missing.
  • the dental prosthesis the so-called “crown”
  • Said coupling is currently of the type normally defined as "flat to flat", according to which a prismatic coupling is obtained between a faceted appendage (which recalls the head of a bolt) provided on one of the components to be coupled and a corresponding faceted seat provided on the other component.
  • said prismatic coupling between the two cooperating components generates an "anti-rotational index"; it being provided that triangles, hexagons, octagons and dodecagons are the most used geometrical shapes.
  • Said "flat to flat" dental implants can be alternatively made according to the external or internal connection principle.
  • said faceted appendage is obtained on the top of the implant, whereas the seat is obtained at the base of the stump.
  • said faceted appendage is obtained on the base of the stump, whereas the seat is obtained on the top of the stump.
  • dental implants with external connection are preferred for their versatility and easiness of use, which substantially derive from the fact that said faceted appendage provided on the top of the implant has a reduced height.
  • a dental implant with external connection is however impaired - in view of the reduced height of said faceted appendage of the implant - by a high tendency to unscrewing and a higher incidence of breakage of the prosthetic screw, being the most stressed component.
  • Dental implants with internal connection are preferred because the faceted appendage provided on the stumps is usually given a considerable height, such that a higher height can also be given to said anti-rotational index, i.e. prismatic coupling between implant and stump.
  • implants with internal connection give a satisfactory resistance to undesired rotational stress.
  • the higher height of said faceted appendage is to the detriment of versatility of use of such a component, which actually requires the use of said MUA to realize screwed prostheses.
  • each stump is provided in lower position with a conical appendage, technically defined as "Morse cone", whereas the implant is provided on top with a conical cavity.
  • the two components are stabilized, preferably with a screw that crosses the entire stump and is engaged on the bottom of the implant.
  • a perimeter prismatic profile is obtained externally on the apical area of the Morse cone of the stump with conical connection
  • said prismatic profile being adapted to be exactly inserted into a corresponding seat obtained on the bottom of said conical cavity of the implant.
  • an "apical index" is established between the stump with conical connection and the implant.
  • Another advantage of such a conical connection consists in the fact that the stump tends to be - especially if the connection with the implant is sufficiently long - totally unaffected by the stress, including the strong stress caused by transversal loads.
  • the mastication stress is distributed along a higher height of the implant, thus avoiding stress peaks for the crown area of the implant (i.e. on top) that could easily cause the unscrewing and breakage of the implant, as well as an excessive transmission of the load for the cortical bone.
  • the dentist is obliged to keep a large stock with multiple implant lines, in order to have the necessary components always available according to the specific case.
  • the first purpose is to realize dental implants provided with the main advantages of the various traditional techniques, but without the corresponding drawbacks.
  • the second purpose is to allow dentists to configure the apparatus of the invention at their discretion in such manner to obtain, from time to time, a dental implant with the most suitable structural and functional features according to the specific requirements.
  • the apparatus of the invention makes it possible to obtain a dental implant providing for conical connection between stump and implant, and at the same time guarantees that an effective prismatic coupling or "anti-rotational index" is established between these two parts (comparable to the type known as "flat to flat").
  • Such an anti-rotational index is established at the height of the crown section of the implant. Such a fact is extremely advantageous because it facilitates the dentist's work, with special reference to making the impression.
  • said anti-rotational crown index is obtained in such manner to guarantee - unlike in the traditional "flat to flat” technology - perfect “sealing" between the interfaced surfaces of each stump and relevant implant, in order not to leave any space for bacterial settlement.
  • Such sealing has been obtained by providing - at level of said anti- rotational crown index - the cooperating of suitable inclined surfaces that also favor perfect stability between implant and stump.
  • the additional interesting feature of the apparatus of the invention is the fact that it can be used to make dental implants adapted to be indifferently provided with short or long stumps, where the higher or lower length of said stumps is actually referred to the length of their Morse cones.
  • Fig. 1 is an exploded axonometric view of the cooperation modes of three parts of the apparatus of the invention
  • FIG. 2 is a cross-sectional view of the parts of Fig. 1 after being assembled completely;
  • FIG. 3 is an axonometric view of the stump shown in the preceding figures
  • Fig. 4 is the same of Fig. 1 , except for it shows different parts;
  • FIG. 5 is a cross-sectional view of the parts of Fig. 4 after being assembled completely;
  • FIG. 6 is an axonometric view of the stump shown in figures 4 and 5;
  • Fig. 7 is an axonometric view of the implant shown in the preceding figures 1 , 2, 4 and 5.
  • the modular apparatus of the invention is composed of a plurality of parts adapted to be used in combination or alternatively.
  • the first of these parts consists in an implant (1 ) usually consisting in an externally threaded cylindrical stem provided, in correspondence of its opening (otherwise definable as “crown section"), with a conical seat (10) with side walls (1 1 ) converging towards the apical section of the implant (1 ).
  • Said side walls (1 1 ) are provided with substantially U-shaped impressions (12) disposed along the height and regularly spaced.
  • the back wall of said impressions (12) has an inclined profile such that the depth of each of said impressions increases from the opening of the implant (1 ) towards the apical section of the same.
  • the bottom (10a) of said conical seat (10) is joined with a conical hole (13) provided with smooth walls, which ends into a cylindrical hole (14) with threaded walls.
  • the second part of the apparatus of the invention consists in a first stump (2), usually consisting in a tubular cylindrical stem provided in apical position (i.e. in correspondence of the end facing the implant) with enlarged head (20).
  • a collar (21 ) protrudes in lower position - configurable under all aspects as a Morse cone - provided with height compatible with the depth of said seat (10) of the implant (1 ).
  • Said collar (1 ) is crossed by a hole (20a) defined by a perimeter shoulder (20b) on the inside of said stump (2), as shown in Fig. 2.
  • Said collar (21 ) is provided with conicity both on the internal walls (21 a) and the external walls (21 b); it being also provided that the outlet hole (21 c) of said collar (21 ) has the same section as the opening section of said conical hole (13) of the implant (1 ).
  • said external walls (21 b) of said collar (21 ) have suitably conicity to exactly match the conicity of the side walls (1 1 ) of the seat (10) of the implant (1 ).
  • each said projections (22) is provided with a sloping profile, such that projections (22) have a growing section consistently with the depth of said impressions (12) of the implant (1 ).
  • projections (22) have a growing section consistently with the depth of said impressions (12) of the implant (1 ).
  • Such a stump (2) is adapted to be coupled with male-female coupling with the implant (1 ), as shown in Fig. 2.
  • the third part of the apparatus of the invention is a screw (3) adapted to provide stable coupling between the implant (1 ) and said first stump (2), as shown in Figs. 1 and 2.
  • the peculiarity of the screw (3) is that it is provided, immediately under the enlarged head (30), with a stem comprising an upper conical section (31 ) with smooth walls, which is joined with a lower cylindrical section (32) with threaded walls.
  • Fig. 2 shows the installation mode of the screw (3).
  • the screw (3) is inserted into the stump (2), in such manner that its stem penetrates inside the implant (1 ).
  • the threaded section (32) of the screw (3) is adapted to be progressively engaged into the threaded cylindrical hole (14) of the implant (1 ).
  • Such a helicoidal coupling favors the progressive descending travel of the screw (3) towards the bottom of the implant (1 ) until its enlarged head (30) is stopped against the shoulder (20b) internally defining the hole (20a) that crosses the collar (21 ) of the stump (2).
  • the additional consequence is that the conical section (31 ) of the screw (3) is exactly engaged and simultaneously engaged inside the hole (20a) of the collar (21 ) of the stump (2) and inside the cylindrical hole (13) of the implant (1 ).
  • the apparatus of the invention also comprising a fourth part, basically consisting in a second stump (4) adapted to be fixed to said implant (1 ) in alternative to the first stump (2), as shown in Figs. 4, 5 and 6.
  • the second stump (4) usually consisting in a tubular cylindrical stem, is provided with tapered end (40), crossed by a cylindrical hole
  • Said tapered end (40) is composed of a first section (42) with conical profile, joined with a second thinned section (43) equally provided with conical profile.
  • the two sections (42, 43) are joined in correspondence of a perimeter shoulder (44) interposed between them.
  • said first section (42) of the second stump (4) is adapted to be exactly engaged into said conical seat (10) of the implant (1 ), before said shoulder (44) provided in lower position is stopped against the bottom (10a) of the conical seat (10), such to generate forced coupling.
  • Said second section (43) of the second stump (4) is adapted to be engaged into the conical hole (13) provided on the implant (1 ) under the conical seat (10).
  • the conicity of the walls of said second section (43) exactly corresponds to the conicity of the walls surrounding the conical hole (13) of the implant (1 ).
  • the stem of said screw (V) can be normally engaged into said threaded hole (14) provided towards the bottom of the implant (1 ).
  • the fixing of the screw (V) is completed when the head of the screw (V) is stopped against the shoulder (45) defining the cylindrical hole (41 ) crossing the tapered end (40) of said second stump (4).
  • the second stump (4) is provided, on the external walls of the first section (42) of its tapered end (40), with a series of projections (22) perfectly matching the ones provided on said first stump (2) and likewise adapted to be exactly engaged inside said impressions (12) obtained on the walls defining said conical seat (10) provided on the opening of the implant (1 ).
  • the dental implant is provided with an efficient anti- rotational index - obtained by means of said coupling between projections (22) and impressions (12). Moreover, because of the exact coupling between said second section (43) of the stump (4) and the cylindrical hole (13) of the implant (1 ), the formation of empty spaces, which can be attacked by bacteria, between the cooperating parts.
  • said first stump (2) is provided with said perimeter projections (22)
  • an alternative constructive version can be realized, wherein said tapered end (21 ) is provided with perfectly smooth external walls (21 b) devoid of said projections (22).
  • said implant (1 ) is internally provided, along its axial hole, also with a perimeter prismatic seat (16), formed of a series of vertical ribs, adapted to be used for screwing, by means of a tool, the implant into the patient's bone.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)

Abstract

La présente invention concerne un appareil pour des implants dentaires comportant une haute polyvalence en raison du fait qu'il utilise un implant apte à coopérer indifféremment avec des moignons longs et courts.
PCT/EP2012/062942 2011-07-04 2012-07-03 Appareil modulaire pour des implants dentaires WO2013004703A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000089A ITAN20110089A1 (it) 2011-07-04 2011-07-04 Attrezzatura modulare per impianti dentali.
ITAN2011A000089 2011-07-04

Publications (1)

Publication Number Publication Date
WO2013004703A1 true WO2013004703A1 (fr) 2013-01-10

Family

ID=44509519

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/062942 WO2013004703A1 (fr) 2011-07-04 2012-07-03 Appareil modulaire pour des implants dentaires

Country Status (2)

Country Link
IT (1) ITAN20110089A1 (fr)
WO (1) WO2013004703A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015118543A1 (fr) * 2014-02-05 2015-08-13 Ophir Fromovich Implant dentaire pour recueil et répartition osseuses
US9681930B2 (en) 2014-12-15 2017-06-20 Jjgc Industria E Comercio De Materiais Dentarious S/A Implants for enhanced anchoring within bone
USD816841S1 (en) 2014-12-15 2018-05-01 Jjgc Industria E Comercio De Materiais Dentarios S/A Bone implant
US10898301B2 (en) 2016-05-05 2021-01-26 Jjgc Industria E Comercio De Materiais Dentarios S.A. Prosthetic assembly and method for producing the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006045186A1 (de) * 2006-08-25 2008-03-20 Mehrhof, Jürgen Aufbau für ein zweiteiliges Zahnimplantat
US20090123889A1 (en) * 2005-09-16 2009-05-14 Jurgen Mehrhof Two-Part Dental Implant
DE102009027044A1 (de) * 2009-06-19 2011-01-05 Mehrhof Implant Technologies Gmbh Mehrteiliges Zahnimplantat

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090123889A1 (en) * 2005-09-16 2009-05-14 Jurgen Mehrhof Two-Part Dental Implant
DE102006045186A1 (de) * 2006-08-25 2008-03-20 Mehrhof, Jürgen Aufbau für ein zweiteiliges Zahnimplantat
DE102009027044A1 (de) * 2009-06-19 2011-01-05 Mehrhof Implant Technologies Gmbh Mehrteiliges Zahnimplantat

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015118543A1 (fr) * 2014-02-05 2015-08-13 Ophir Fromovich Implant dentaire pour recueil et répartition osseuses
US10709524B2 (en) 2014-02-05 2020-07-14 Straumann Holding Ag Dental implant for bone collection and distribution
US9681930B2 (en) 2014-12-15 2017-06-20 Jjgc Industria E Comercio De Materiais Dentarious S/A Implants for enhanced anchoring within bone
USD816841S1 (en) 2014-12-15 2018-05-01 Jjgc Industria E Comercio De Materiais Dentarios S/A Bone implant
USD837378S1 (en) 2014-12-15 2019-01-01 Jjgc Industria E Comercio De Materiais Dentarios S/A Bone implant
USD838369S1 (en) 2014-12-15 2019-01-15 Jjgc Industria E Comercio De Materiais Dentarios S/A Bone implant
USD845485S1 (en) 2014-12-15 2019-04-09 Jjgc Industria E Comercio De Materiais Dentarios S/A Bone implant
US10398533B2 (en) 2014-12-15 2019-09-03 Jjgc Industria E Comercio De Materiais Dentarios S/A Implants for enhanced anchoring within bone
US10898301B2 (en) 2016-05-05 2021-01-26 Jjgc Industria E Comercio De Materiais Dentarios S.A. Prosthetic assembly and method for producing the same

Also Published As

Publication number Publication date
ITAN20110089A1 (it) 2013-01-05

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