WO2000047113A2 - Dispositif de connexion a vis pour implants a integration osseuse, procede de serrage de ce dispositif, et appareil utilise selon ce procede - Google Patents

Dispositif de connexion a vis pour implants a integration osseuse, procede de serrage de ce dispositif, et appareil utilise selon ce procede Download PDF

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Publication number
WO2000047113A2
WO2000047113A2 PCT/IT1999/000400 IT9900400W WO0047113A2 WO 2000047113 A2 WO2000047113 A2 WO 2000047113A2 IT 9900400 W IT9900400 W IT 9900400W WO 0047113 A2 WO0047113 A2 WO 0047113A2
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WO
WIPO (PCT)
Prior art keywords
screw
tightening
support
plant
force
Prior art date
Application number
PCT/IT1999/000400
Other languages
English (en)
Other versions
WO2000047113A3 (fr
Inventor
Andrea Bazzurro
Giocondo Vianello
Original Assignee
Andrea Bazzurro
Giocondo Vianello
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 Andrea Bazzurro, Giocondo Vianello filed Critical Andrea Bazzurro
Priority to EP99959680A priority Critical patent/EP1154729A2/fr
Publication of WO2000047113A2 publication Critical patent/WO2000047113A2/fr
Publication of WO2000047113A3 publication Critical patent/WO2000047113A3/fr

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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
    • A61C8/0089—Implanting tools or instruments
    • 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
    • A61C8/0065—Connecting devices for joining an upper structure with an implant member, e.g. spacers with expandable or compressible means
    • 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
    • A61C8/0068—Connecting devices for joining an upper structure with an implant member, e.g. spacers with an additional screw
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8695—Washers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/18—Flexible shafts; Clutches or the like; Bearings or lubricating arrangements; Drives or transmissions
    • A61C1/185—Drives or transmissions
    • A61C1/186—Drives or transmissions with torque adjusting or limiting means
    • 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

Definitions

  • the present invention relates to a screw connection device which can be used for anchoring a prothesis to an osteo-integrated plant, such as a dental plant or a maxilla-facial plant.
  • the invention also relates to a method for tightening this device, as well as an apparatus for use in this method.
  • the value can be determined of the tightening torque which must be applied to this screw in order to obtain an axial force on the screw which is predetermined experimentally.
  • Screw connection devices for osteo-integrated plants which comprise: a first element, or plant element, which is to be integrated within a bone tissue, having a hole with a threaded portion, a second element, or support, for supporting a prothesis, which is mounted on said plant element, and having a through hole, and a connection screw, inserted with clearance through said through hole of the support and screwed within the threaded portion of said hole of the plant element, so as to hold the support in a final connected condition on the plant element.
  • Figure 1 of the annexed drawings shows, by way of example, a device according to the above indicated prior art, which is presently used for dental plants.
  • Reference numeral 1 generally designates the plant element which is integrated by known techniques within the bone tissue 2 of a lower or upper jaw.
  • the plant element 1 has a substantially elongated cylindrical body, with a blind cylindrical axial hole 3 which extends from an end surface la.
  • the cylindrical hole 3 has an enlarged mouth portion 3a and an end threaded portion 3b. Within the mouth portion 3a a stem portion 4 of a support 5 is received.
  • the stem portion 4 includes a polygonal cross-section 4a, such as an hexagonal cross-section, engaged within a portion having a co-operating cross-section of the hole 3 in order to prevent relative rotation between support 5 and plant element 1.
  • the support 5 has a head 6 which rests against the end surface la of the plant element 1 in the final connected condition of the support 5 on the plant element 1.
  • a further supporting element 7 on which the dental prothesis 8 is formed over support 5 there is fixed a further supporting element 7 on which the dental prothesis 8 is formed.
  • Reference numeral 9 designates the connection screw, which is inserted with clearance through a through axial hole 10 of support 5 and having an end portion 9a screwed within the end cylindrical portion 3b of hole 3 of the plant element 1.
  • the plant element 1, the support 5 and the connection screw 9 are usually made of titanium or a titanium alloy.
  • the plant element 1 is pressed or screwed into the bone tissue 2.
  • the shape of the plant element 1 may be different, depending upon the application and the insertion method.
  • the support 5 is secured to the plant element 1 by means of the screw 9.
  • the hole 3 is covered by a covering screw.
  • the dental surgeon carries out the necessary operations for forming a mould and preparing the support 5 for the dental prothesis.
  • the technical problem which is encontered in the known devices of the above described type is a risk of a low efficienty of the connection of the support 5 to the plant element 1 because of insufficient tightening of the connection screw 9, which in turn is due to that it is impossible to carry out a precise control of the tightening operation when support 5 is installed and also because of the lack of efficient means preventing unscrewing.
  • the precise force induced on the screw, at the end of the tightening operation, by the applied tightening torque can never be determined. Therefore, the dental surgeon carries out tightening of the screw without knowing the force induced in the screw by the applied tightening torque, which also is unknown if a manual screw driver is used.
  • the loosening of screw 9 which may, and actually does, take place with the known devices involve the need of non-programmed interventions with resulting disturbance and difficulties.
  • the object of the present invention is that of providing a device of the type indicated at the beginning of the present description which is able to overcome the above mentioned drawbacks.
  • the invention has the object of providing a device of the above indicated type which ensures the application of a tightening torque such that a predetermined axial force is obtained on the screw.
  • a further object of the invention is that of providing a device which can be installed by extremely simple operations and yet in a precise and reliable manner.
  • the invention provides a device of the type indicated at the beginning of the present description, characterized in that between said second element and said first element there are interposed means adapted to be deformed as a result of the tightening of the connection screw.
  • the above mentioned deformable means may be permanently deformable.
  • the above mentioned deformable means are elastically deformable and are specifically constituted by a spring element comprising at least one Belleville washer.
  • this spring element is constituted by a single piece incorporating two Belleville washers with opposing cones.
  • the above mentioned spring element is placed co-axially with the connection screw, between two facing surfaces of the support and the plant element and, due to its shape, is able to keep the support and the plant element co-axial with each other during the tightening operation, so as to then ensure a perfect contact between these elements .
  • the above mentioned spring element in form of double Belleville washer is interposed between the support and an auxiliary support resting on the plant element.
  • the plant element and this auxiliary support have complementar portions mating with each other to prevent a relative rotation of said elements.
  • a further advantage of the invention lies in that, once tightening has been carried out, said spring element acts also as an anti-unscrewing means.
  • an electronic wrench adapted to transmit the value of the tightening torque applied to the screw during the tightening operation to electronic processing means, so as to enable the operator to carry out the tightening operation in a precise and controlled manner, untill a predetermined tightening force is reached.
  • This predetermined force is located preferably experimentally, by making in use of a device which also forms part of the invention, which can be provided according to different embodiments, as indicated in the claims annexed hereto.
  • connection device forms part of the invention, which method includes the use of the above mentioned electronic wrench as well as a preliminary experimental step in which the test device which also has been mentioned above is used.
  • figure 1 is a cross-sectional view of a device according to the prior art, which has been already described in the foregoing
  • figure 2 is a cross-sectional view showing the device according to the invention according to a preferred embodiment, in a first operative condition
  • figure 3 shows the cross-sectional of figure 2 in a second operative condition
  • figure 4 is a perspective exploded view of the device of figures 2
  • figure 5 is a cross-sectional view of a preferred embodiment of the spring element forming part of the device according to the invention
  • figure 6 is an elevational view, partially in cross-section, of an apparatus in form of a dynamometric press which can be used for experimental determination of the tightening force which must be applied to the device according to the invention
  • figures 7, 8 are diagrams showing the principles at the basis of the invention, in the embodiment which makes use of the apparatus of figure 6
  • figure 9 is a cross-sectional view of a variant of figure 4
  • figure 10 is a view of an electronic wrench which can be used for installing the device
  • the device according to the invention comprises a first element I, which, in the case of an osteo- integrated plant, is an element to be integrated within a bone tissue, and a second element M which is a support for supporting a prothesis.
  • the second element M is secured to the first element I by means of a connection screw 9 which is inserted into a through hole 10 of element M and is screwed into a threaded portion of an axial hole 3b of the first element I.
  • the screw 9 has a head with a socket 10a of hexagonal shape or any other shape adapted to be engaged.
  • FIG. 1 shows the unit according to the invention in a preassembled condition, before tightening.
  • the auxiliary support S and the second element M have facing surfaces between which the spring element 11 is interposed (see figure 5) which incorporates two Belleville washers with opposing cones in a single piece.
  • the element 11 is co-axial with screw 9.
  • the advantage of using a double spring made as a single piece derives from the need of keeping the support M and support S co-axial with each other during tightening, so as to ensure a contact thereof.
  • All the elements of the device are made of titanium alloy or any other suitable material.
  • FIG 3 shows the device according to the invention once tightening has been carried out. As shown, tightening of the connection takes place along with an elastic deformation of the double washer 11, which renders the tightening process adapted to be controlled precisely, due to the increase of the rotation which must be imparted to the screw for achieving full tightening, this rotation being proportional to the axial deformation travell of the double Belleville washer.
  • an electronic wrench (figure 10) adapted to trasmit the value of the tightening torque applied to the screw during the tightening operation to electronic processing means, so as to enable the operator to follow the tightening operation in a precise and controlled manner, untill reaching a predetermined tightening force.
  • this tightening force is determined in a preliminary experimental stage by means of a dynamometric press (see figure 6) which measures the force necessary to deform the double Belleville spring 11 interposed between support S and support M (figure 7) .
  • reference numeral 50 generally designates the dynamometric press, comprising a crank 51 which is used to rotate a screw 52. Scrue 52 applies a pressure on a piston 53, with the interposition of a load cell 54, which is able to output a signal proportional to the reached load on a cable 55.
  • Piston 53 applies pressure on a specimen P which is constituted by the assembly of support S, support M and double Belleville spring interposed therebetween, these elements being those which will be then used for preparing the final prothesis.
  • the load cell 54 in press 50 continously detects the applied force and tras its the value thereof to an electronic processor such as a personal computer, which is thus able to generate the diagram shown in figure 7 of the variation of the force causing deformation of the double Belleville spring 11, which is rectilinear and continuous up the point where support M comes in contact with support S (k point) .
  • an increase in rotation generates an abrupt rise of the straight line representing the deformation force (which 7113
  • Press 50 also comprises an optical reader 152 co-operating with a disk 155 for detecting the rotation of screw 52.
  • the double Belleville spring 11 (see figure 5) is shaped so as to ensure that the two contact planes of elements M and S are kept parallel to each other during tightening, so as to reach a full contact of these elements at the end of the tightening operation.
  • FIGS 10, 11 and 12 show an embodiment of the electronic wrench, designated by reference numeral 70, which can be used for installing and tightening the screw 9.
  • Wrench 70 has one end 71 where the wrench body defines a housing containing a worm screw 72 / helical wheel 73 coupling.
  • the worm screw 72 can be actuated by manually rotating a hand-wheel 74 which is rotatably mounted inside the body of wrench 70 and connected by a shaft 74a to worm screw 72.
  • the rotation of hand-wheel 74 is transmitted by shaft 74a, worm screw 72 and helical wheel 73 to a shaft 75 having a cross-section complementar to that of socket 10a of screw 9, so as to be able to cause screwing.
  • An optical reader 73 cooperating with the toothed wheel 78 which is connected in rotation to shaft 74a, is able to generate a signal indicative of the rotation angle of hand-wheel 74, whereas a load cell 79 detects the force generated by the axial reaction due to the rotation torque applied to worm screw 72.
  • the load cell 79 is therefore able to generate a signal proportional to the applied tightening torque, whereas the value of the screwing rotation is signalled by the optical reader 77.
  • the electronic processing means to which the wrench is connected may be programmed so as to generate an optical and/or acoustic signal when a predetermined tightening force is reached. More precisely, the signals coming from the electronic wrench may be sent to an electronic processing and displaying system, such as a personal computer.
  • the personal computer continuously displays the value of the applied torque as signalled by the electronic wrench 70.
  • actuation of the screw does not cause any further deformation of the double Belleville spring 11, and only tends to apply a further load on the screw, thus causing a great increase in the torque which will be simultaneosly perceived both by the hand of the operator and the personal computer.
  • the tension directly applied to the screw becomes much greater than that which was previously necessary to deform the double Belleville spring.
  • the personal computer immediately displays the above mentioned abrupt increase in the torque, by showing an abrupt variation in direction of the straight line in the diagram of figure 8, the k point corresponding to the force at the end of the deformation of the double Belleville spring 11.
  • FIG. 8 shows the tightening torque in a hypothetical example where the k point is located at a force of 300 N and a torque of 150 Nmm. Obviously, the tightening torque is proportional to the tightening force. It is thus possible to obtain a greater force by a proportionally greater torque.
  • spring 11 acts also as an anti-unscrewing means adapted to intervene any time that the screw may be engaged by a force greater than the mounting force, so as to keep elements S, M in contact with each other.
  • an alternative embodiment is provided to the device for controlling the screwing data and the components thereof.
  • This alternative device comprises both the same prothesis elements which have been described with reference to figures 2, 3, 4, 5, and the wrench shown in figures 10 - 12, or that which will described in the following with reference to figure 13; however, in liew of the dynamometric press of figure 6, the apparatus shown in figures 14 - 16 is used.
  • This apparatus is a screwing data detector by which the tightening torque can be determined which is necessary to deform the double Belleville spring 11 untill reaching contact between support M and support S, the same apparatus also being used to determine to axial force which is induced in the connection screw 9, the whole as a function of the angular rotation of the wrench 70 which causes screwing.
  • the screwing data detecting apparatus is generally designated by reference numeral 100 and comprises a framework 101 supporting a bush 102 having its upper surface with a portion 102a (see figure 15) with an identical shape as that of the plant which is to receive elements S, M which are being tested in apparatus 100.
  • Portion 102a constitutes a projection with hexagonal cross-section corresponding to the hexagonal portion of plant I which prevents rotation thereof (see element 20 in figure 2) .
  • support S which carries the double Belleville spring 11 and support M.
  • Screw 9 (see figure 15) is pre-screwed, so as to apply a light force on the above mentioned elements, within a cylindrical body 103 which is slidably mounted within bush 102 and is prevented to rotate therewithin by an end portion 103a thereof having a square cross-section corresponding to the cross-section of bush 102.
  • Body 103 has a plate 105 at its lower end to which a load cell 106 is secured.
  • the processing means connected to the apparatus will be thus able to define a diagram of the type shown in figure 17, on the basis of which the relationship is determined between the applied tightening torque and the force consequently induced in the screw. This relationship cannot be calculated, since it varies case by case depending upon the friction forces between the walls which are in friction mutual contact during tightening.
  • the processing means will attend to calculating the value of the force induced in the screw as a function of the applied tightening torque, whose value will be signalled to the processing means by the same wrench which is used by the dentist to carry out the tightening operation.
  • This processing means will thus be able to emit an acoustic and/or optical signal when a predetermined force is reached in this screw.
  • the dentist will be able to choose the value of the tightening torque to be applied for obtaining a desired force.
  • Figure 17 shows both the line which is obtained experimentally, representing the force/torque relationship, and two further lines which are defined above and below the experimental line, by adding and subtracting, respectively, an error such as in the order of 10 %. Therefore, for each value of the tightening torque, the diagram provides a minimum and maximum value of the force correspondingly induced in the screw.
  • FIG 13 shows an alternative embodiment of the wrench, which in this case is generally designated by reference numeral 60, which can be used to tighten screw 9.
  • Wrench 60 has one end 61 with a shaft having a cross-section corresponding to the cross-section of the socket 10a of the screw, for engaging this socket to actuate the screw.
  • the rotation of the end portion of the wrench takes place by means of a free-wheel system or a ratchet-and-pawl system.
  • the wrench 60 has a hollow handle 62, inside which a rod 63 is slidably mounted which has one end pushing against a load cell 64.
  • the latter outputs a signal on a cable 65, which is indicative of the force applied thereon (which is proportional to the tightening torque) .
  • rod 63 The opposite end of rod 63 is in engagement against an element 66 rigidly connected to the active end 61 of the wrench.
  • Element 66 is articulated at an out-of axis point 67 to the body of the handle 62 and is subject to the action of a return spring 68. Due to the distance of pivot 67 from the axis, when the key is used to rotate screw 9, an oscillation of element 66 around pivot 67 is obtained which causes the rod 63 to push against the load cell 64. The load cell is thus able to output a signal proportional to the applied tightening torque.
  • Figure 9 shows a variant in which the auxiliary support has been eliminated.
  • the first element I has a front socket 24 with hexagonal cross-section where a front hexagonal appendage 25 of support M is received.
  • a variant of the screwing data detecting apparatus of figures 14, 15 is shown in figures 18, 19.
  • the parts common to figures 14, 15 are designated by the same reference numeral.
  • the main difference of the apparatus shown in figures 18, 19 with respect to that of figures 14, 15 lies in that in this case the load cell 106 is located co-axially with screw 9 and element 103, thus ensuring a more balanced assembly.
  • the latter is received within a seat 206 formed in the lower surface of an elongated plate 205, perpendicular to plate 201, having the ends received in slots 207 diametrically opposite to each other, formed in the upper edge 204.
  • the ends of plate 205 are locked between the bottom of slots 207 and the lower edge of bush 203. Due to this arrangement, the cell 106 always remains in a fixed position relative to structure 101, whereas screw 208 moves rigidly with element 103 following screwing of the screw 9, thus applying the same force to this cell as that to which screw 9 is subjected due to its tightening.
  • the apparatus 100 is also able to measure the torsion torque acting on screw 9.
  • the rotation which will be transmitted by screw 9 to plate 201 is opposed by a rod 220 which is guided through hole 221 of structure 101 and acting against a load cell 222 carried by bracket 223.
  • the personal computer can thus calculate the composite stress 7113
  • the apparatus also comprises a potentiometric sensor 224 which signals the rotation of wrench 111.
  • the principle at the basis of the invention is that of interposing means adapted to be deformed as a result of the tightening of the connection screw between the two elements of the connection which must come in contact with each other, so as to enable the operator to carry out the tightening operation in a precise and controlled manner, untill reaching a predetermined tightening force.
  • the above mentioned deformable means may be constituted by any type of spring means, also different from that illustrated with reference to the preferred embodiment of the invention, or also by means adapted to undergo a permanent deformation.
  • any other type of mutual connection may be arranged which causes a permanent deformation of one or both the parts of the connection as a result of the tightening of the screw.
  • the predetermined force corresponding to completion of the tightening operation is found experimentally, it is also possible, according to the invention, that this value of the force is determined by calculation.

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  • 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)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Dental Preparations (AREA)

Abstract

L'invention concerne un dispositif de connexion à vis, en particulier pour des implants à intégration osseuse, ce dispositif comprenant un premier élément (I) et un second élément (M) serrés par l'intermédiaire d'une vis de connexion (9). Des organes (11) capables de se déformer élastiquement et/ou d'être corroyés suite au serrage de ladite vis de connexion (9) sont placés entre ces deux éléments (I, M), afin de permettre à l'utilisateur d'effectuer l'opération de serrage de manière à la fois précise et contrôlée, jusqu'à ce que soit atteinte une force de serrage prédéterminée de manière expérimentale ou calculée, des organes d'indication reliés à des organes de commande électroniques étant destinés à indiquer visuellement et/ou acoustiquement que cette force de serrage a été atteinte.
PCT/IT1999/000400 1999-02-15 1999-12-03 Dispositif de connexion a vis pour implants a integration osseuse, procede de serrage de ce dispositif, et appareil utilise selon ce procede WO2000047113A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99959680A EP1154729A2 (fr) 1999-02-15 1999-12-03 Dispositif de connexion a vis pour implants a integration osseuse, procede de serrage de ce dispositif, et appareil utilise selon ce procede

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999TO000112 IT1307221B1 (it) 1999-02-15 1999-02-15 Dispositivo di collegamento a vite, particolarmente per impiantiosteointegrati, ad esempio per impianti dentali.
ITTO99A000112 1999-02-15

Publications (2)

Publication Number Publication Date
WO2000047113A2 true WO2000047113A2 (fr) 2000-08-17
WO2000047113A3 WO2000047113A3 (fr) 2000-11-23

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PCT/IT1999/000400 WO2000047113A2 (fr) 1999-02-15 1999-12-03 Dispositif de connexion a vis pour implants a integration osseuse, procede de serrage de ce dispositif, et appareil utilise selon ce procede

Country Status (3)

Country Link
EP (1) EP1154729A2 (fr)
IT (1) IT1307221B1 (fr)
WO (1) WO2000047113A2 (fr)

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JP2017056086A (ja) * 2015-09-18 2017-03-23 株式会社松風 緩み防止機構を有した歯科用アバットメントスクリュ

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Publication number Priority date Publication date Assignee Title
WO1993006787A1 (fr) 1990-04-20 1993-04-15 Jean Perisse Implant dentaire multibloc
EP0593926A1 (fr) 1992-10-23 1994-04-27 Friatec Ag Keramik- Und Kunststoffwerke Implant dentaire
US5733122A (en) 1995-05-31 1998-03-31 Gordon; Basil Dental implant attachment assembly including device and method for resisting loosening of attachment

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2036515A1 (fr) * 2007-09-17 2009-03-18 Straumann Holding AG Agencement pour connecter un implant dentaire et une butée
WO2009037260A1 (fr) * 2007-09-17 2009-03-26 Straumann Holding Ag Dispositif de liaison entre un implant dentaire et un pilier
EP2417928A1 (fr) * 2007-09-17 2012-02-15 Straumann Holding AG Agencement pour connecter un implant dentaire et une butée
US8784103B2 (en) 2007-09-17 2014-07-22 Straumann Holding Ag Connection arrangement between a dental implant and an abutment
EP2417928B2 (fr) † 2007-09-17 2019-03-06 Straumann Holding AG Agencement pour connecter un implant dentaire et une butée
JP2017056086A (ja) * 2015-09-18 2017-03-23 株式会社松風 緩み防止機構を有した歯科用アバットメントスクリュ

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EP1154729A2 (fr) 2001-11-21
ITTO990112A1 (it) 2000-08-15
WO2000047113A3 (fr) 2000-11-23
IT1307221B1 (it) 2001-10-30

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