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
  • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
  • A61C8/0022—Self-screwing
• • 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
  • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
  • A61C8/0034—Long implant, e.g. zygomatic implant
• • 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
  • A61C8/0075—Implant heads specially designed for receiving an upper structure

Definitions

• the present invention relates to dental implants and, in particular, it concerns a one-piece, inclined dental-implant configured For the optimal exploitation of areas having relatively abundant bone structure as anchoring regions
• atrophic bone patients require either complicated bone augmentation procedures to construct an anchoring structure for dental implants or insertion of dental implants at angles non-perpendicular to the crestal surface of alveolar process to exploit those areas having relatively more ample supply of bone tissue. These angles of inclination cause the abutment surface to be orientated in positions unsuitable ' for use with prosthetics or bridges.
• additional hardware is attached to the implant to provide a properly orientated abutment surface useful for the attachment of denial prosthetics and bridges.
• a second draw back of the above-described, two-piece implants relates to inclined implantation, limitations for which the abutment heads are able to correct.
• the connection arrangement used to attach the abutment correction hardware to the shaft limits abutment surface angles of inclination (relative to the longitudinal axis of the implant) to less than thirty degrees, thereby limiting the deployment of the implants specifically to areas requiring a corresponding implant inclination.
• US patent 5,362,236 discloses an angular, dental implant configured to be anchored in the maxilla the zygomatic process.
• the shortcoming with this implant is that its exceedingly long shaft makes it limited to use in the maxilla and zygomatic process.
• the present invention is a one-piece, inclined dental-implant and corresponding method for exploiting areas of relatively abundant bone structure as anchoring regions while preserving biological width and enhancing implant recovery.
• a method for inclined implantation of one-piece dental implants into a crestal surface of an alveolar process of a patient comprising: (a) driiiing a bore into the crestal surface of the alveolar process at a angle non-perpendicular to the crestal surface, (b) inserting the dental implant into said bore, the dental implant having: i. a threaded shaft not exceeding twenty-two millimeters in length, and ii.
• an abutment surface on top of an abutment head integrally formed with said shaft said abutment surface being disposed so as to form an angle with said shaft so that when said shaft is implanted in an inclined position within the alveolar process, said abutment surface is disposed in a substantially parallel position relative to the crestal surface, suitable for attachment of a dental prosthetic or an arch bridge, and (c) rotating said implant until said implant advances into a final, implant position in which said abutment head is disposed in a position substantially parallel to the crestal surface of the alveolar process, suitable for the attachment of a dental prosthetic or an arch bridge.
• the shaft is implemented as a first shaft-section integrally formed with a second-shaft section, said second shaft-section having a diameter and said first shaft-section having a diameter changing as a function of increasing distance from said abutment head such that the diameter of said first shaft-section progressively decreases and then progressively increases to the diameter of said second shaft- section.
• the second shaft- section is implanted as a tapered shaft decreasing in diameter as a function of increasing distance from said first shaft section.
• the abutment head is implemented with a lateral surface geometry having at least one engagement surface for being engaged by an insertion tool having corresponding inner socket geometry.
• a one-piece dental-implant for implantation non-perpendicular to a crestal surface of an alveolar process of a patient comprising: a threaded shaft not exceeding twenty-two millimeters in length, and (b) an abutment surface on top of an abutment head integrally formed with said shaft, said abutment surface being disposed so as to form an angle with said shaft so that when said shaft is implanted in an inclined position within the alveolar process, said abutment surface is disposed in a substantially parallel position relative to the crestal surface of the alveolar process, suitable for attachment of a dental prosthetic or an arch bridge,
• the shaft is implemented as a first shaft-section integrally formed with a second shaft- section, said second shaft-section having a diameter and said first shaft-section having a diameter changing as a function of increasing distance from said abutment head such that the diameter of said first shaft-section progressively decreases
• the abutment head is implemented with a lateral surface geometry having at least one engagement surface for being engaged by an insertion tool having corresponding inner socket geometry.
• FIG. 1 is an isometric view of the dental-implant depicting the inclined abutment surface and reduced diameter portion of the shaft.
• FIG. 2 is schematic side view of the dental-implant of Figure 1.
• FIG. 3 is a schematic, partial cross-sectional side view of the dental- implant of Figure 1.
• FIGS. 4 and 5 are isometric views of the dental-implant depicting the inclined abutment surface and an engagement arrangement.
• FIGS. 6 and 7 are schematic cross-sectional views of the dental implants implanted in alveolar processes of lower and upper jawbones, respectively. DESCRIPTION OF THE PREFERRED EMBODIMENTS
• the present invention is a one-piece, inclined dental- implant and a corresponding method for exploiting areas of relatively abundant bone structure as anchoring regions while preserving biological width and enhancing implant recovery.
• the principles, methods and operation according to the present invention may be better understood with reference to the drawings and the accompanying description. It should be noted that the term “alveolar process” appearing throughout this document refers to the process found on the mandible and the maxillae.
• Figures 1 and 2 depict a one-piece dental-implant designated generally
• Abutment head 1 includes abutment surfaces 7, and threaded connection arrangement 10.
• Abutment surface 7 is a surface or a collection of surfaces disposed on the uppermost portion of abutment head 2 and provides the supporting structure for attached dental prosthetics or bridges structures as will be discussed later in this document.
• the present document refers to the totality of annular abutment surfaces disposed at different heights in the non-limiting, preferred embodiment disclosed herewith as an "abutment surface”.
• any abutment surface 7 disposed on abutment head 2 in a manner so as to form a non- perpendicular angle with longitudinal shaft axis 9, as is most clearly visible in Figure 3, is included within the scope of the current invention.
• implant 1 is configured to be anchored in an area of the alveolar process having a sufficient anchoring structure adjacent to a region of inadequate anchoring structure in vertical alignment with the point of implant insertion.
• the prosthetic or bridge structure requires abutment surface 7 to be disposed substantially parallel with the crestal surface of alveolar process.
• the abutment surface angle-of-inclination serves as a built-in, corrective feature for devices implanted at angles non-perpendicular to the crestal surface of the alveolar process.
• Implant 1 is constructed in accordance to the needs of the patient, so that angle-of-inclination of abutment surface 7 matches the prescribed implant inclination; consequently implantation abutment surface 7 is disposed substantially parallel with the crestal surface of alveolar process.
• a dental prosthetic attached to such an abutment will then be in alignment with the natural dentition without the use of additional correction hardware.
• abutment surface 7 is disposed on the abutment head 2 so as to form an angle of inclination 8 with longitudinal axis 9 of 17 degrees, 30 degrees, and in certain cases, 45 degrees. It should be noted; however, that angles of inclination 8 ranging from one to ninety degrees relative to longitudinal axis 9 are within the scope of the current invention.
• angle of inclinations 8 advantageously enables the usage of bridge structures to be attached to a plurality of implants 1 having a total implant inclination between two adjacent implants ranging from 0-180 degrees; figure 7 depicts implants 1 whose collective implant inclination is 80 degrees.
• Threaded attachment arrangement 10 is implemented in a non-limiting, preferred arrangement as a bore disposed in the center of abutment head 2 as shown in Figures 1, 3 and 4. It should be appreciated that a bored frustum structure or any other single screw connection arrangement for dental prosthetics or bridges are within the scope of the current invention.
• Abutment head 2 is integrally formed with shaft 3, and more specifically with first shaft-section 4.
• This integral connection between the abutment head and first shaft-section 4 advantageously eliminates surface irregularities characteristic of joints that inevitably serve as a haven for microbial colonization leading to biological width reduction and eventual bone resorption as mentioned above.
• the single piece construction advantageously adds strength to dental implant X and simplifies procedures involved in implantation by eliminating the need to connect additional hardware used to provide a useful abutment surface for the connection of dental prosthetics and bridges.
• First shaft-section 4 is implemented in a non-limiting, preferred embodiment as a progressively changing diameter as a function of increasing distance from abutment head 2 such that the diameter of the first shaft-section is at a maximum at the juncture point with abutment head 2, progressively decreases and then progressively increases until it reaches its maximum diameter at the juncture point with the second shaft-section 5 as shown in Figures 1 and 2.
• This shaft configuration advantageously facilities blood flow and regeneration of connective tissue thereby enhancing recovery after implant surgery.
• second shaft-section 5 is implemented as a tapered shaft narrowing in diameter as a function of increasing distance from first shaft-section 4 and includes self tapping recess 6 disposed in the distal end of second shaft-section 5 to facilitate self-tapping as implant 1 advances through a bore drilled into the patient's alveolar process.
• the degree of taper ranges from one to three degrees.
• first shaft-section 4 ranges in diameter from 2.0-5.0 millimeters (including threading heights) at the widest diameter whereas the widest diameter of the shaft 3 ranges between 2.5-6.0 millimeters
• FIGS. 4 and 5 depict an additional feature relating to the insertion and removal of implant 1 from the upper and lower jawbones by way of an insertion tool (not-shown).
• Abutment head 2 has a lateral surface geometry including curved surface 12 and a planar surface 11 that collectively form a an engagement structure suited for receiving a torque applied by an insertion too! having a socket with a corresponding, inner-surface geometry.
• Lateral insertion configurations advantageously eliminate the danger of deforming abutment surface 7 or connection arrangements 10 disposed within the boundaries of abutment head 2 when applying a torque during insertion or removal of implant 1. It should be noted that any combination of lateral surface geometries configured to be engaged by a torque directing device is within the scope of the current invention.
• the implants are constructed from titanium or any other material having the bio-cornpatibility and strength associated with titanium.
• Thread and taper dimensions are those employed by practitioners skilled in the art.
• the length of entire implant 1, from the uppermost portion of abutment head 2 to the distal portion of shaft 3 does not exceed twenty millimeters, of which shaft 3 is about 15 millimeters.
• Dental implant 1 is implanted by drilling a bore of a diameter appropriate for the implant of choice into the alveolar process at an angle of inclination leading into a region of relatively abundant bone structure as shown in Figures 6 and 7.
• the self-tapping shaft 3 advances through the bore as implant 1 is rotated by way of the insertion tool (not shown) until implant 1 is disposed in the desired anchoring regions where it is held firmly in place.
• abutment surface 7 is disposed in a position substantially parallel to the crestal surface of the alveolar process in preparation of connection of a dental prosthetic or bridge structure.

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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)
• Dental Prosthetics (AREA)

Priority Applications (5)

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Citations (4)

• 2009
  • 2009-05-21 WO PCT/IB2009/052141 patent/WO2009141801A1/en active Application Filing
  • 2009-05-21 CA CA2718783A patent/CA2718783A1/en not_active Abandoned
  • 2009-05-21 RU RU2010152203/14A patent/RU2010152203A/ru not_active Application Discontinuation
  • 2009-05-21 EP EP09750256A patent/EP2303179A1/en not_active Withdrawn
  • 2009-05-21 CN CN200980118506XA patent/CN102026586A/zh active Pending
• 2010
  • 2010-09-20 IL IL208272A patent/IL208272A0/en unknown

Patent Citations (4)

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