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
  • A61C8/0086—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

• these implants include a body shaped to be impacted in the alveolar bone.
• the body of the implant 1 has 0 various arrangements for the introduction of interchangeable components until the final implantation of the dental prosthesis. Whatever the solutions used, these types of implants constitute rigid assemblies.
• Patent WO 8706816 teaches a dental implant constituted by a metal tube which internally receives a support capable of receiving the tooth and resting on a circular disc.
• the support has, at its upper part, a plastic envelope.
• a stopper ensures the obturation of the implant and exerts a slight compression pressure on the plastic envelope.
• the plastic envelope does not provide real
• the object of the invention is to remedy these drawbacks in a simple, safe, effective and rational manner. 35
• the problem which the invention proposes to solve is to be able to reproduce the anatomical characteristics normally exhibited by a tooth, in order to limit the forces transmitted to the bone, while increasing the life of the implant, at the level of its connection. with the alveolar bone.
• a dental implant has been designed and developed, the body of which internally has means capable of ensuring the mounting, with the capacity of cushioned displacement, of a shaped support element for receiving the tooth.
• the means capable of imparting the damped mounting of the support element are integrated into the body in order, on the one hand, to prevent deterioration of the damping material in contact with oral liquids and, on the other hand, avoid creep.
• the means consist of a shock absorbing cushion housed in the bore of the body and receiving in superposition a pellet with a bearing surface cooperating with a complementary shape a screw for fixing the support element.
• the transverse forces transmitted to the support element are returned via the screw, to the damping cushion.
• the implant has conforming connecting elements to make said element and said body integral while allowing the element to have degrees of freedom in translation parallel to the main axis and in rotation to have a bending angle relative to said main axis.
• the support element and the connecting elements have complementary geometric guiding shapes.
• the problem posed of transmitting the longitudinal forces to the cushion cushion is solved in that the bearing surface of the pad is concave, the screw head having. a surface of complementary shape.
• the connecting elements are constituted by an integral assembly comprising a damping ring, a retaining plug and a ring periodontal said assembly being coupled to the body.
• the damping ring cooperates with the screw and receives the transverse forces transmitted to the support element and returned by said screw.
• the retaining plug and the periodontal ring have conical internal shapes to allow angular movement of
• the body has shaped grooves 25 to act as anti-rotational during bone regrowth.
• Figure 1 is a perspective view before assembly and in section, of the main elements of the implant according to the invention.
• Figure 2 is a perspective view of the main
• Figure 3 is a longitudinal sectional view after mounting of the components of the dental implant.
• Figure 4 is a schematic sectional view showing the impact of the implant in the alveolar bone.
• the body of the implant designated by (1) receives internally, various elements for mounting with elastic displacement capacity of a support element (2).
• This support element (2) can have different embodiments by constituting, for example, a healing abutment abutment or a support pivot for fixing the tooth (D) ( Figure 4).
• the body (1) of cylindrical shape, has an internal recess (1a) for mounting a damping cushion (3) which is supported in the bottom of said recess.
• the damping cushion (3) receives in superposition, a pellet (4), having a bearing surface (4a) cooperating with a shape complementary to the head (5a) of a fixing screw (5).
• This screw (5) cooperates with a thread (2a) of the support element (2).
• connection elements (6) (7) (8) are mounted to make said body and said element integral, while allowing elastic mounting of the element (2) with degrees of freedom of angular displacement.
• the bearing surface (4a) of the patch (4) has a concave hemispherical shape, while the screw head (5a) has a bearing surface of complementary shape.
• the screw (5) transmits the longitudinal forces to the shock absorbing cushion (3). Note that the interposition of the pad (4), between the damping cushion (3) and the screw (5), avoids damaging said cushion and ensures its maintenance in the bore of the body by blocking its creep.
• the connecting elements (6) (7) (8) are arranged to form an integral assembly and are constituted respectively by a damping ring, a retaining plug and a periodontal ring.
• the damping ring (6) cooperates with the screw (5) and receives the transverse forces transmitted to the support element (2), returned by said screw.
• This ring (6) has a cylindrical recess (6a) in which is mounted a cylindrical surface (2b) of the support element (2).
• This bore (6a) is extended coaxially by a conical circular bearing on which the screw head (5a) is supported.
• the ring (6) is housed and centered by a shouldered circular bearing (6b) in the recess (1a) of the body (1).
• the ring (6) has a conical circular bearing surface (6c) intended to be engaged in a conical bore of complementary shape (7a) which has the retaining plug (7).
• This plug (7) has a threaded seat (7b) intended to be screwed into a thread (1b) formed at the end of the recess (1a) of the body (1). Coaxial with the conical bore (7a), the plug (7) has a cylindrical threaded bore (7c) for screwing a threaded seat (8a) of the periodontal ring (8). Note that the direction of screwing is reversed.
• the periodontal ring (8) has a conical bore (8b) in which is engaged the cylindrical surface (2b) of the element (2).
• the periodontal ring (8) allow an angular movement of the element (2), with degrees of freedom in translation parallel to the main axis and in rotation according to a bending angle relative to said axis.
• FIG. 3 shows the assembly of the various constituent elements of the dental implant according to the invention.
• the damping cushion (3) is housed in the bottom of the bore (1a) of the body (1) and receives, in support, the pellet (4).
• the screw head (5a) On the hemispherical part (4a) of the patch (4), the screw head (5a) is centered.
• the damping ring (6) is engaged in the bore of the body (1) bearing on the screw head (5a).
• the plug (7) is screwed at the end of the body (1) and receives the periodontal ring (8).
• the cylindrical bearing surface (2b) of the support element is engaged in the bores (6a) (7a) and (8b) of the elements (6) (7) and (8) to be made integral with the screw (5).
• the body (1) is equipped with grooves (1c) shaped to act as anti-rotational during bone regrowth.
• the plug (7) allows the establishment of a obturator element in place of the periodontal ring (8) during the integration phase of the implant in the alveolar 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)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9428806

Family Applications (1)

Country Status (4)

Families Citing this family (3)

Family Cites Families (5)

• 1992
  • 1992-04-06 FR FR9204518A patent/FR2689386A1/fr not_active Withdrawn
• 1993
  • 1993-04-06 WO PCT/FR1993/000343 patent/WO1993019688A1/fr not_active Application Discontinuation
  • 1993-04-06 CA CA 2110718 patent/CA2110718A1/fr not_active Abandoned
  • 1993-04-06 EP EP19930908996 patent/EP0587874A1/de not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events