WO2016027267A1 - Implant dentaire à pas variable - Google Patents

Implant dentaire à pas variable Download PDF

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Publication number
WO2016027267A1
WO2016027267A1 PCT/IL2015/050829 IL2015050829W WO2016027267A1 WO 2016027267 A1 WO2016027267 A1 WO 2016027267A1 IL 2015050829 W IL2015050829 W IL 2015050829W WO 2016027267 A1 WO2016027267 A1 WO 2016027267A1
Authority
WO
WIPO (PCT)
Prior art keywords
implant
core
distance
tip
main thread
Prior art date
Application number
PCT/IL2015/050829
Other languages
English (en)
Inventor
Gershon Goldenberg
Eitan SHTARKMAN
Shlomo TROKMAN
Original Assignee
Precise Implant Systems E.S. Ltd.
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 Precise Implant Systems E.S. Ltd. filed Critical Precise Implant Systems E.S. Ltd.
Publication of WO2016027267A1 publication Critical patent/WO2016027267A1/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
    • A61C8/0018—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
    • 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
    • A61C8/0025—Self-screwing with multiple threads
    • 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
    • A61C8/0068—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

Definitions

  • the field of the invention is dental implants.
  • Dental implants are inserted in an upper or lower jawbone when, as a result of extraction of a tooth, there is a location without a tooth in the sequence of existing teeth.
  • a dental implant serves as a base that is inserted into the jawbone for a single tooth or, in cases of several adjacent missing teeth, as a base for a strip of teeth comprising more teeth than implants.
  • One of the main points that determine if an implant will provide a strong base for the teeth is its ability to integrate into the tissue of the jaw bone.
  • the structure of the bone is different from location to location and from one person to another. The greater the density of the bone the more successful will be integration of the implant. It is accepted to classify the jaw bone as soft or hard according to its internal structure. In the world of implants there exist implants for hard bone and for soft bone. The main difference between them is the structure of the external threads and the distance between them.
  • the distance between threads is larger than in hard bone and the distance between the core of the implant and the tip of the threads is smaller for hard bone than for soft bone.
  • the outer surface (envelope) of the bone is a layer called “cortical bone", a layer that is considered to be hard.
  • the second, is called “spongy bone”. This layer comprises most of the interior of the bone and is considered to be soft bone.
  • the thickness of the cortical bone layer depends on the location of the bone. In the lower jaw the thickness is larger, typically between 3-4 mm, because during chewing the tooth is exerts high pressure. In the rear portions the cortical bone is thinner 1mm or sometimes less.
  • the distance between the threads should be appropriate for both la3'ers, that is in the hard layer threads having smaller pitch and in the soft layer threads having larger pitch. In standard implants there is no solution to this important requirement.
  • the successful integration of the implant is dependent on many factors. Among these factors is the texture of the surface of the implant. There are many methods to produce a surface suitable for the growth of bone cells inside cavities on the surface of the implant. An important part of the successful growth of bone cells in these cavities is the compression and attachment of the surface of the implant to the surface of the bone. If there are spaces between the implant and the surface of the bone as a result of non-uniform or insufficient compression, there won't be integration of the bone cells into the surface of the implant and a greater chance of ejection of the implant in a short time. An additional very important point is the ability of the implant to penetrate the hole that was drilled before the implant is bored into the bone while compressing the bone and creating friction between the surfaces of the implant and the bone. The key point here is the ability to gradually and completely compress the surface of the bone against the surface area of the implant. Gradual compression is important in order to prevent cracks and fractures in the bone that may prevent integration of the implant in the bone.
  • the invention is a dental implant comprising a core and an external thread created on the outside surface of the core.
  • the effective pitch of the external thread varies from a value P at the bottom of the implant to P/2 at the top of the implant.
  • the external thread is comprised of a main thread having a uniform pitch P that spirals upwardly around the core and a spiral ridge located between adjacent turns of the main thread that spirals upward in parallel to the main thread.
  • the ridge also has a pitch P and is formed by creating two spiral channels that wind around the core between turns of the main thread.
  • the distance between the outer edge of the core and the tip of the ridge is constant and the distance between the outer edge of the core and the tip of the main thread is reduced as the main thread winds its way from the bottom to the top of the implant.
  • the distance between the outer edge of the core and the tip of the main thread is large relative to the distance between the outer edge of the core and the tip of the ridge at the bottom of the implant and approaches the value of the distance between the outer edge of the core and the tip of the ridge at the top of the implant.
  • the distance between the outer edge of the core and the tip of the ridge is between 5% to 25% of the distance between the outer edge of the core and the tip of the main thread at the bottom of the implant and approaches the value of the distance between the outer edge of the core and the tip of the main thread at the top of the implant.
  • the distance between the outer edge of the core and the tip of the ridge is 15% of the distance between the outer edge of the core and the tip of the main thread at the bottom of the implant and approaches the value of the distance between the outer edge of the core and the tip of the main thread at the top of the implant.
  • Fig. 1A is a schematic external view of the dental implant of the invention.
  • Fig. IB is a cross-sectional view of the implant of Fig. 1A;
  • Fig. 1C is an enlarged view of area "A" in Fig. IB;
  • FIG. 2 A schematically shows a bore drilled through in a jawbone in preparation for insertion of a dental implant
  • Fig. 2B schematically shows a dental implant of the invention after it has been screwed into the jawbone.
  • Fig. 1A is a schematic external view of the dental implant 10 of the invention.
  • Fig. IB is a cross -sectional view of the implant of Fig. 1A and Fig. 1C is an enlarged view of area "A" in Fig. IB.
  • Implant 10 comprises a core 12 that has the shape of a truncated cone with its apex at the bottom of the implant and its largest diameter at the top of the implant.
  • an internally threaded bore 14 is created in the top part of core 12 to accommodate an abutment.
  • a main thread 16 having a uniform pitch P is created on the outer surface of core 12.
  • Main thread 16 is created such that at the bottom of the implant the distance D is relatively large and as thread 16 winds its way towards the top of the implant the outer edges of the turns of the thread around the core are trimmed so that D is gradually reduced until it approaches the value of d, which is constant from the bottom to the top of ridge 20.
  • the effective pitch of the threads on the implant also gradually changes from P near the bottom of the implant to P/2 near the top of the implant.
  • Fig. 2A schematically shows a bore 26 drilled through the cortical bone 22 into the spongy bone 24 of jawbone 28 in preparation for insertion of a dental implant.
  • Fig. 2B schematically shows dental implant 10 of the invention after it has been screwed into the bore.
  • the effective pitch of the threads of the implant define zones of low pressure 32 and high pressure 30 that the implant exerts on the bone that forms the sides of the bore in the jawbone.
  • the main feature of the invention is the two channels 18 that are located between the threads 16 and create between them a ridge 20, i.e. a pressure thread that climbs to the top of the screw parallel to main thread 16.
  • the channels can be semicircular, square, triangular or any other geometric shape according to the requirements.
  • the channels and ridge occupy a uniform area that creates a space between turns of main thread 16 that is larger than the spacing between threads in existing implants.
  • the ridge 20 provides a surface that is able to compress bone that it comes in contact with in the same way that thread 16 compresses the jaw bone.
  • the channels 18 with the ridge 20 between them allow easier penetration of the implant during the process of screwing it into the bone because of the large distance between surfaces of the threads of the implant that press against the bone at the bottom of the implant compared to its middle section.
  • the penetration of the implant at its point of entrance is as non-traumatic as possible in order not to create a fracture or cracks.
  • the more that the implant advances into the bore the distance D-d between the tips of ridges 20 and those of the main threads 16 is reduced and the pressure on the walls increases.
  • the main part of the implant already is located in the spongy bone and the chance of fractures or cracks is very much reduced.
  • D - d At the bottom of the implant, i.e. the point of penetration of the implant into the bone, D - d has its maximum value. Therefore at the lower part of the implant the ridge 20 on core 12 doesn't influence the distance between the threads, i.e. the effective pitch, because the threads of main thread 16 constitute the main elements responsible for screwing the implant into the bone. As the core advances to its widest part at the top of the implant the value of D - d decreases gradually. In a typical dental implant of this invention, d is equal to between 0.05D to 0.25D at the bottom of the implant and d approaches the value of D at the top. As D-d gets smaller the ridges 10 become more relevant from the point of view of the pitch, which gradually changes from P to P/2.
  • the pitch at the lower part of the implant is 2.4 mm then at the top of the implant the pitch will be 1.2 mm.
  • the creation of the channels 18 and resulting ridge 20 together with the changing value of D - d cause the effective pitch of the threads of the implant of the invention to be large at the lower part of the implant that is located in the soft bone and small at the top of the implant that is located in the hard bone and at the same time the surface area of the implant in contact with the bone gradually increases as the implant is screwed into the bone.
  • the effect of this is that pressure exerted by the implant on the walls of the bore as the implant is screwed into the bone is increased slowly allowing creation of gradual compression on all of the surface area of the bone in accordance with the anatomical structure of the bone and allows penetration of the implant with minimum damage to the bone.
  • the implant of the invention provides an optimal match between the pitch of its external threads and the hardness property of the bone and provides a larger surface contact area between implant and bone than in prior art implants, thereby allowing the implant to be successfully integrated rapidly and to remain in the bone for a period of many years.

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

L'invention concerne un implant dentaire qui comporte un noyau et un filetage externe créé sur la surface extérieure du noyau. Le filetage externe est constitué d'un filetage principal ayant un pas uniforme P, qui s'enroule en spirale vers le haut autour du noyau, et d'une arête en spirale ayant un pas uniforme P et située entre des spires adjacentes du filetage principal, qui s'enroule en spirale vers le haut parallèlement au filetage principal. La distance entre le bord extérieur du noyau et la pointe de l'arête est constante, et la distance entre le bord extérieur du noyau et la pointe du filetage principal est réduite à mesure que le filetage principal s'enroule de bas en haut de l'implant. On obtient ainsi le filetage externe ayant un pas efficace qui varie d'une valeur P au niveau du bas de l'implant à P/2 en haut de l'implant.
PCT/IL2015/050829 2014-08-21 2015-08-17 Implant dentaire à pas variable WO2016027267A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL234249A IL234249A0 (en) 2014-08-21 2014-08-21 A removable dental implant
IL234249 2014-08-21

Publications (1)

Publication Number Publication Date
WO2016027267A1 true WO2016027267A1 (fr) 2016-02-25

Family

ID=55350262

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2015/050829 WO2016027267A1 (fr) 2014-08-21 2015-08-17 Implant dentaire à pas variable

Country Status (2)

Country Link
IL (1) IL234249A0 (fr)
WO (1) WO2016027267A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023177384A1 (fr) * 2022-03-17 2023-09-21 Игорь ЦЫРКИН Implant dentaire

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060172258A1 (en) * 2005-02-01 2006-08-03 Niznick Gerald A Tapered endosseous dental implants with external multiple lead threads
US20070099153A1 (en) * 2003-05-21 2007-05-03 Ophir Fromovich Condensing skeletal implant that facilitate insertions
US20100092920A1 (en) * 2008-10-13 2010-04-15 Biodenta Swiss Ag Artificial Root for Dental Implantation and Method for Manufacturing the Same
US20100216093A1 (en) * 2009-02-23 2010-08-26 Victor Krush Dental implant
US20110045437A1 (en) * 2006-03-21 2011-02-24 Uri Arni Dental implant
US20120237898A1 (en) * 2011-03-17 2012-09-20 Paltop Advanced Dental Solutions Ltd. Multi-stage dental implant
US20140141388A1 (en) * 2012-08-07 2014-05-22 Mazen Dukhan Dental Implant and Method of Implantation

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070099153A1 (en) * 2003-05-21 2007-05-03 Ophir Fromovich Condensing skeletal implant that facilitate insertions
US20060172258A1 (en) * 2005-02-01 2006-08-03 Niznick Gerald A Tapered endosseous dental implants with external multiple lead threads
US20110045437A1 (en) * 2006-03-21 2011-02-24 Uri Arni Dental implant
US20100092920A1 (en) * 2008-10-13 2010-04-15 Biodenta Swiss Ag Artificial Root for Dental Implantation and Method for Manufacturing the Same
US20100216093A1 (en) * 2009-02-23 2010-08-26 Victor Krush Dental implant
US20120237898A1 (en) * 2011-03-17 2012-09-20 Paltop Advanced Dental Solutions Ltd. Multi-stage dental implant
US20140141388A1 (en) * 2012-08-07 2014-05-22 Mazen Dukhan Dental Implant and Method of Implantation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023177384A1 (fr) * 2022-03-17 2023-09-21 Игорь ЦЫРКИН Implant dentaire

Also Published As

Publication number Publication date
IL234249A0 (en) 2014-11-30

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