WO2007074128A1 - Prothese dentaire qui peut etre fixee a un implant au moyen d'une vis - Google Patents

Prothese dentaire qui peut etre fixee a un implant au moyen d'une vis Download PDF

Info

Publication number
WO2007074128A1
WO2007074128A1 PCT/EP2006/070056 EP2006070056W WO2007074128A1 WO 2007074128 A1 WO2007074128 A1 WO 2007074128A1 EP 2006070056 W EP2006070056 W EP 2006070056W WO 2007074128 A1 WO2007074128 A1 WO 2007074128A1
Authority
WO
WIPO (PCT)
Prior art keywords
dental prosthesis
screw
recess
contact surface
tooth replacement
Prior art date
Application number
PCT/EP2006/070056
Other languages
German (de)
English (en)
Inventor
Joachim Pfeiffer
Original Assignee
Sirona Dental Systems Gmbh
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
Priority claimed from DE200510062431 external-priority patent/DE102005062431B3/de
Application filed by Sirona Dental Systems Gmbh filed Critical Sirona Dental Systems Gmbh
Publication of WO2007074128A1 publication Critical patent/WO2007074128A1/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
    • 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
    • A61C8/0068—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
    • 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
    • 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
    • A61C13/08—Artificial teeth; Making same
    • A61C13/09—Composite teeth, e.g. front and back section; Multilayer teeth
    • 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
    • A61C8/0054—Connecting devices for joining an upper structure with an implant member, e.g. spacers having a cylindrical implant connecting part
    • 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
    • A61C8/0059—Connecting devices for joining an upper structure with an implant member, e.g. spacers with additional friction enhancing 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
    • A61C8/0086—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools with shock absorbing means

Definitions

  • Dental prosthesis which can be attached to an implant with a screw
  • the invention relates to a tooth replacement part, which can be fastened to an implant by means of a screw, comprising a first recess for inserting a screw head, a second recess for passing a screw shaft, wherein the second recess has a reduced diameter compared to the first recess, and further comprising a coaxial with a central axis of the recesses arranged contact surface for the screw head.
  • the purpose of the invention is to fix a dental prosthesis part by means of a screw to an implant positionally accurate, the dental prosthesis is subjected to the lowest possible tensile stress.
  • Implant-fixable dental prostheses often consist of ceramic materials that are typically combined with metallic materials for connection to an implant. Ceramic materials have a low resistance to breakage, but have a very high hardness relative to the metallic materials such as titanium. Dental replacement parts, in particular abutments, are therefore provided at the connection to the implant with an inner part made of titanium or with a titanium core, which can absorb the load during screwing much better and initiate the implant.
  • the object of the invention is to design and arrange a tooth replacement part in such a way that an optimal connection to a dental implant is made by utilizing the existing strength of the tooth replacement part made of ceramic material.
  • a tooth replacement part which can be fastened to an implant by means of a screw, comprises a first recess for insertion of a screw head and a second recess for passing a screw shank.
  • the second recess has a reduced diameter compared to the first recess.
  • the dental prosthesis part further comprises a contact surface arranged coaxially to a central axis of the recesses for the screw head, the abutment surface facing the screw head having a normal vector with a directional component perpendicular to the central axis of the second recess and pointing away from this central axis, between the central axis and the abutment surface acute angle ß is provided.
  • the generated over the screw on the dentures partially acting clamping force primarily pressure forces within the dental prosthesis part, so that the occurrence of tensile stresses or cracks is prevented.
  • the compressive strengths of ceramic are significantly higher than the tensile strengths, so that can be used by taking advantage of the direction of the invention of force introduction ceramics with lower strength. The tolerance range of the ceramic with respect to the acting screw force is thus increased.
  • the contact surface of the dental prosthesis part according to the invention and the corresponding contact surface of the screw can be curved or, as a special case, also conical in shape.
  • the contact surface of the dental prosthesis part is rotationally symmetrical and the mantle curve of this contact surface is straight.
  • the mantle curve is a sectional curve that generates the respective contact surface when rotating about the central axis.
  • the contact surface with a straight mantle curve and a normal vector with a directional component to the central axis thus corresponds to a lateral surface of a truncated cone.
  • the normal vector thus points in the same direction at every point of the contact surface.
  • the directional component F x of the contact force F is thus the same at every point of the contact surface.
  • the contact force F acts evenly on the entire contact surface and excessive pressure areas, which can lead to the formation of cracks in the dental prosthesis, are thus avoided.
  • the first recess is bounded by a first inner wall of the dental prosthesis part, wherein a transition surface between the first inner wall and the contact surface has a radius Rl and that the radius Rl between 0.1 mm and 0.3 mm, in particular 0.15 mm is large.
  • the inventive design of the transition surface notches or cracking voltages within avoided this highly loaded area of the dental prosthesis part. Deviating from a radius of corresponding size, other concave designs, in particular elliptical shapes, are provided.
  • a first free space is provided in the area of the transitional area, which the
  • the angle ⁇ is an acute angle, so that according to the invention compressive stresses are generated.
  • angles must be selected in the aforementioned value range so that the necessary
  • Screw force is introduced into the dental prosthesis.
  • contact surface with an arcuate is introduced into the dental prosthesis.
  • Sheath curve can be assumed to be an effective angle, which, in contrast to the conical design describes the effectively resulting vector F of the contact force.
  • the second recess may be delimited by a second inner wall of the dental prosthesis part, wherein a straight transition surface is provided between the second inner wall and the abutment surface, which is aligned flat and at right angles to the central axis.
  • the straight transition surface of the dental prosthesis part has, for example, the advantage over a sharp transition without a transitional surface that cracking stresses within the ceramic material in the region of the transitional surface are avoided.
  • the second recess may be bounded by a second inner wall of the dental prosthesis part, wherein a curved transition surface between the second inner wall wall and the contact surface of the dental prosthesis part is provided which has a radius.
  • the curvature of the transition surfaces may also have a different concave shape, for example an elliptical shape.
  • a curved transition surface of the dental prosthesis part has the advantage that notches or cracking stresses in the region of the transitional surface are prevented.
  • a straight transition surface is provided between the abutment surface of the screw and the screw shank , which is aligned flat and at right angles to the central axis.
  • This transition surface may also be curved and, for example, have a radius.
  • the contact between the screw and the tooth replacement part exists only in the area of the two contact surfaces. In the case of various embodiments of the transition surfaces of the tooth replacement part and the screw, contact in the region of the transitional surfaces is prevented. This is the case, for example, when the transition surface of the screw is curved and that of the dental prosthesis part is planar.
  • a clearance is provided in the region of the transition surfaces, which limits the contact surface to the part according to the invention, so that an additional investment of the screw head in the region of the transition surface is prevented.
  • a contact force is exerted, which leads to an elastic deformation of the tooth replacement part and the screw, wherein the contact surface of the screw is slightly displaced along the contact surface of the dental prosthesis.
  • the two contact surfaces are pressed together under the action of the contact force.
  • the intended clearance thus has the purpose to provide a uniform distribution of the contact force over the entire contact surface between the two contact surfaces and thus to prevent excessive pressure areas, which can lead to cracking.
  • connection surface which can be applied against the implant, wherein the connection surface has a coating of gold or titanium and the coating is between 1 .mu.m and 20 .mu.m thick.
  • connection surface is already provided in the blank stage of the dental prosthesis part and is designed as a reference surface which has a known relative position to the implant connection.
  • An already prefabricated connection surface reduces the individual machining time as well as the accuracy requirements for the grinding machine.
  • it is also provided to prefabricate the recess for the screw and the contact surface for the screw including the transitional surfaces already in the blank, so that it only has to be processed with respect to the contact surface for a tooth crown.
  • the connection surface is designed as reference surfaces, which has a known relative position to the implant connection.
  • the dental prosthetic item may be formed of a core having a mating surface and a sheath, the core being formed of a harder or stronger ceramic than the sheath.
  • the high-strength core takes on the necessary clamping forces, the jacket or the material of the shell is much faster and easier to work.
  • the zirconia core and the sheath may be formed of feldspar ceramic or leucite ceramic. These are tested materials from dentistry and meet the requirements of the dental prosthesis according to the invention.
  • connection materials are also tested materials from dentistry and are particularly suitable for connecting ceramics together.
  • the object is also achieved by a system consisting of a tooth replacement part described above with a screw having a screw head with a contact surface, which is at least partially applied against the contact surface of the dental prosthesis.
  • 130 ° in particular between 110 ° and 120 °, includes or if the contact surface of the screw at least in the fortified
  • Fig. 1 is a schematic diagram in section with dental prosthesis and implant
  • FIG. 2 shows a sectional view according to FIG. 1 with a tooth replacement part consisting of a core and a jacket;
  • 3a shows a sectional view of a tooth replacement part with a convex contact surface
  • 3b is a sectional view of a dental prosthesis with concave contact surface
  • a tooth replacement part 1 shown in FIG. 1 represents a so-called abutment on which a crown is placed.
  • the ceramic abutment 1 is usually connected via a screw 2 with an implant 3 located in the jaw.
  • the abutment 1 has a first and a second recess 4, 5, which together form a two-stage passage opening of the abutment 1 for the screw 2 with respect to the diameter.
  • the recesses 4, 5 are substantially cylindrical and coaxially arranged to a central axis 6 of the abutment 1.
  • both the abutment 1 and the screw 2 have a relative to the central axis 6 preferably conical contact surface 8 and 9 respectively.
  • the contact surface 8 or contact surface 9 or the screw seat are designed in such a way that the abutment 1 is grasped from the outside by the screw head 7, so that a particularly favorable pressure distribution within the loaded area of the abutment 1 arises, which prevents a rupture of the abutment 1 by the tightening or fastening of the screw 2.
  • the abutment surface (8) of the abutment 1 has a normal vector N with a direction component perpendicular to the central axis 6 of the second recess 5 and pointing away from the central axis 6.
  • the contact force F generated by the screw 2 or the screw head 7 additionally has a directional component F x in a direction perpendicular to the center axis 6 and away from it.
  • the first recess 4 is bounded by a cylindrical first inner wall 11, to which the frustoconical contact surface 8 connects.
  • a transition surface 12 designed as a radius R1 is provided in the transition region between the first inner wall 11 and the abutment surface 8.
  • the radius Rl is about 0.15 mm.
  • a free space 13 is provided in the region of the transition surface 12, which restricts the contact surface 8, 9 to the part according to the invention and thus prevents additional contact of the screw head 7 in the region of the transition surface 12.
  • Between the abutment surface 8 and a second inner wall 14 delimiting the second recess 5 is likewise a deviation.
  • a free space 16 is provided in this area, which prevents additional installation of the screw head 7 in the region of the transition surface 15.
  • this transition surface 15 may be formed according to plan embodiment of Figure 2 also plan so that it limits the frusto-conical bearing surface 8 upwards.
  • the transition surface 15 is oriented at right angles to the central axis 6 in this exemplary embodiment.
  • the screw head 7 of the screw 2 is thus on its contact surface 9 against the contact surface 8 of the abutment 1 in the axial direction anleg- or prestressed.
  • a screw shaft 10 of the screw 2 engages in a thread on the blind hole 17 of the implant 3 via a thread (not shown).
  • the abutment 1 has on its lower end face on a connection surface 18 which can be applied in the axial direction against a corresponding connection surface 19 of the implant 3.
  • the pad 18 also has a coating 20 of gold or titanium.
  • the screw head 7 also has a transition surface 21 with a radius R2 between its contact surface 9 and its screw shaft 10.
  • the radius R2 is about 0.15 mm.
  • the abutment 1 of a core 5 and a sheath 6 is formed.
  • the core 5 is formed from a high-strength material such as zirconium oxide, whereas the sheath 6 is formed of a less solid, better machinable or sandable material such as feldspar ceramic or leucite ceramics.
  • the core 5 and the jacket 6 are connected via a glass solder or an adhesive.
  • the area of the contact surface 8 including the transition surface 12 with the radius Rl and the connection surface 18 with the coating 20 are part of the core 5, so that the desired connection forces can be generated to the implant 3, not shown here.
  • the transition surface 15 of the dental prosthesis part 1 between the abutment surface 8 and the second inner wall 14 and the transition surface 21 between the abutment surface 9 and the screw shaft 10 are formed flat and at right angles to the central axis 6.
  • connection surface 18 has two diameter steps.
  • the connection surface 18 has the coating 20 both in the region of the two diameter steps and in the region of the end face surfaces 32 to 34 resulting therefrom.
  • the contact surfaces 8 of the abutment and the contact surfaces 9, not shown, of the screw 2 are formed with arcuate envelope curves.
  • 3a shows a contact surface 8 of the abutment with a convex mantle curve and in FIG. 3b a contact surface 8 of the abutment with a concave mantle curve.
  • the contact force F also has in addition to the directional component F y in the direction of the central axis 6 in addition a directional component F x in a direction perpendicular to the central axis 6 and to this towards.

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 une prothèse dentaire (1) qui peut être fixée à un implant (3) au moyen d'une vis (2), et comprend: une première ouverture (4) destinée à l'introduction d'une tête de vis (7); une seconde ouverture (5) destinée au passage d'une tige de vis (10), la seconde ouverture (5) ayant un diamètre limité par rapport à celui de la première ouverture (4); et une surface d'appui (8) pour la tête de vis (7), disposée de façon coaxiale avec un axe médian (6) des ouvertures (4, 5), la surface d'appui (8) orientée vers la tête de vis (7), ayant un vecteur normal avec une composante directionnelle qui forme un angle droit avec l'axe médian (6) de la seconde ouverture (5), et pointe en direction opposée de l'axe médian (6). Une surface d'appui (9) de la vis (2), orientée vers la tête de vis (7), est conçue pour correspondre à la surface d'appui (8) de la prothèse dentaire (1), au moins dans l'état de fixation.
PCT/EP2006/070056 2005-12-23 2006-12-21 Prothese dentaire qui peut etre fixee a un implant au moyen d'une vis WO2007074128A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US75290205P 2005-12-23 2005-12-23
DE200510062431 DE102005062431B3 (de) 2005-12-23 2005-12-23 Zahnersatzteil, welches mit einer Schraube an einem Implantat befestigbar ist
US60/752,902 2005-12-23
DE102005062431.6 2005-12-23

Publications (1)

Publication Number Publication Date
WO2007074128A1 true WO2007074128A1 (fr) 2007-07-05

Family

ID=37898413

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/070056 WO2007074128A1 (fr) 2005-12-23 2006-12-21 Prothese dentaire qui peut etre fixee a un implant au moyen d'une vis

Country Status (1)

Country Link
WO (1) WO2007074128A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3520730A1 (fr) * 2018-02-02 2019-08-07 VITA-ZAHNFABRIK H. Rauter GmbH & Co. KG Dispositif de maintien pour éléments de prothèse dentaire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3488847A (en) * 1967-03-20 1970-01-13 John N Pettrow Composite artificial ceramic tooth
FR2703581A1 (fr) * 1993-04-06 1994-10-14 Bordes Sylvain Dispositif de montage d'un implant dentaire.
EP1371342A1 (fr) * 2002-06-12 2003-12-17 Dinkelacker, Wolfgang, Dr. med. dent. Implant osseux
EP1396237A1 (fr) * 2002-09-05 2004-03-10 Elephant Dental B.V. Restauration dentaire en céramique renforcée
WO2004091423A1 (fr) * 2003-04-17 2004-10-28 Wolfgang Dinkelacker Implant dentaire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3488847A (en) * 1967-03-20 1970-01-13 John N Pettrow Composite artificial ceramic tooth
FR2703581A1 (fr) * 1993-04-06 1994-10-14 Bordes Sylvain Dispositif de montage d'un implant dentaire.
EP1371342A1 (fr) * 2002-06-12 2003-12-17 Dinkelacker, Wolfgang, Dr. med. dent. Implant osseux
EP1396237A1 (fr) * 2002-09-05 2004-03-10 Elephant Dental B.V. Restauration dentaire en céramique renforcée
WO2004091423A1 (fr) * 2003-04-17 2004-10-28 Wolfgang Dinkelacker Implant dentaire

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3520730A1 (fr) * 2018-02-02 2019-08-07 VITA-ZAHNFABRIK H. Rauter GmbH & Co. KG Dispositif de maintien pour éléments de prothèse dentaire
WO2019149773A1 (fr) 2018-02-02 2019-08-08 Vita Zahnfabrik H. Rauter Gmbh & Co. Kg Dispositif de retenue pour éléments de prothèse dentaire

Similar Documents

Publication Publication Date Title
EP2036515B2 (fr) Agencement pour connecter un implant dentaire et une butée
EP2509532B1 (fr) Implant dentaire
DE69000445T2 (de) Keramischer kugelkopf mit kleinem durchmesser fuer eine hueftgelenksprothese.
EP2735279B1 (fr) Implant dentaire
EP1850784B1 (fr) Implant dentaire
DE102007044852B4 (de) Dentalimplantat
EP3509535B1 (fr) Système de prothèse dentaire
DE69823968T2 (de) Verfahren zur Herstellung eines kaltgehärteten Verbinders für modulare Teile
EP2215989A1 (fr) Elément de montage pour un implant dentaire
EP0483660B1 (fr) Rivet calibré pour assemblages rivés fortement sollicités
EP0853732A1 (fr) Procede et dispositif de transmission de forces entre deux pieces d'assemblage
WO2017020051A1 (fr) Tête de coupe remplaçable, tige d'outil et outil à tige
DE102005062431B3 (de) Zahnersatzteil, welches mit einer Schraube an einem Implantat befestigbar ist
DE4035614C2 (fr)
WO2007074128A1 (fr) Prothese dentaire qui peut etre fixee a un implant au moyen d'une vis
WO1996022746A1 (fr) Implant osseux modulaire a cavite glenoïde et broches
EP4153088B1 (fr) Implant, structure et système d'implant
DE102020001313A1 (de) Verfahren zum Kalibrieren eines Abutments oder eines Implantats eines Dental-Implantatsystems
DE69618333T2 (de) Abstandsschraube
DE102004052024A1 (de) Zahnimplantat
EP2767254A2 (fr) Système d'implant céramique
EP2292933A2 (fr) Agencement de liaison de deux composants, notamment une bride de liaison
EP3053540B1 (fr) Vis d'implant et système d'implant
EP3749249B1 (fr) Implant osseux comprenant une partie d'ancrage constituée d'une matière plastique biocompatible
DE102007054560A1 (de) Zweiteiliges Dentalimplantat

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06841534

Country of ref document: EP

Kind code of ref document: A1