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EP1996103A2 - Vis pour implantation osseuse a interface os-implant augmentee - Google Patents

Vis pour implantation osseuse a interface os-implant augmentee

Info

Publication number
EP1996103A2
EP1996103A2 EP07717679A EP07717679A EP1996103A2 EP 1996103 A2 EP1996103 A2 EP 1996103A2 EP 07717679 A EP07717679 A EP 07717679A EP 07717679 A EP07717679 A EP 07717679A EP 1996103 A2 EP1996103 A2 EP 1996103A2
Authority
EP
European Patent Office
Prior art keywords
screw according
previous
screw
thread
profiling
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP07717679A
Other languages
German (de)
English (en)
Inventor
Sonja Deola
Mauro Scardanzan
Luca Nanetti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 ITBL20060010 external-priority patent/ITBL20060010A1/it
Priority claimed from ITBL20060013 external-priority patent/ITBL20060013A1/it
Application filed by Individual filed Critical Individual
Publication of EP1996103A2 publication Critical patent/EP1996103A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • 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 or setting implements
    • 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
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • 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
    • A61C8/0003—Not used, see subgroups
    • A61C8/0004—Consolidating natural teeth
    • A61C8/0006—Periodontal tissue or bone regeneration
    • 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
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • 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 or setting implements
    • 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
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A61B17/863—Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • 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 or setting implements
    • 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
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A61B17/8635—Tips of screws

Definitions

  • the present invention relates to a bone implant screw with increased bone-implant interface.
  • the invention relates to an implant of the above kind permitting combining the need of obtaining a sufficient primary stability and of optimising the surface available for bone integration of the implant.
  • Acid etching This gives the surface of the screw a coarseness which makes it possible to have an optimum stabilisation of the coagulum which is followed by the formation of granulation tissue that is replaced by a provisional matrix and finally by new bone.
  • the degree of coarseness, which is obtained, is less than 10 micrometers (to be found in medical literature).
  • the surface of a general screw can be described as consisting of a thread and a part of the shaft where there is no thread; this latter part may not exist as in the case where the thread covers the shaft completely.
  • Object of the present invention is that of suggesting a solution for a screw whose structure is designed to maximise these two requirements A and B described above.
  • the solution according to the present invention concerns a variation both local and overall in the profile of the surfaces of the thread or the shaft of a general type of bone implant screw, of a type that will remain permanently in the base of the implant.
  • figure 1A schematically shows a thread of an endosseous screw
  • figure 1 A is a section view of the screw of figure 1
  • figure 1 B schematically shows thread of figure 1A with three in-line tapping elements with increasing dimensions, the sections of which are shown in figures 1 B s1 , 1 B S 2
  • figure 2C schematically shows thread of figure 1A with three in-line tapping elements with increasing dimensions on both faces, the section of which is shown in figure 2Ci
  • figure 1 D schematically shows another thread of figure 1A with three in-line tapping elements with increasing dimensions on both faces, the section of which is shown in figure 1 D 1
  • figures 2.E1 , 2.E2, w.E3a, 2.E3b, 2.F1 , 2.F2a, 2.F2b show embodiments of projecting surfaces for increasing the screw - bone contact surface
  • figures 2.G1 , 2.G2, 2.G3 and 2.G4 schematically show the shape of profile that can be obtained
  • figures 3A, 3H, 3I, 3 J and 3K, 4M, 4N and 40 show embodiments of the system according to the invention.
  • figure 1 shows a typical thread of a osteosynthesis screw. Such a type of screw is illustrated in Figure 1.A.
  • the solution suggested according to the present invention aims to introduce modifications to the surface of the screw in order to satisfy the requirements A and B mentioned above.
  • this invention is for the overall surface of the interface between the implant and the surrounding bone tissue to be increased by increasing the macroscopic and/or microscopic surface of the thread itself, of the shaft or both by applying one or more incisions to one or both faces of the thread or to the shaft, parallel to but not on the same plane as the thread by placing on the thread and/or on the shaft tapping elements which are able to make incisions into the bone as the implant is being fitted, and/or by placing on the thread elements in relief which can be inserted into the tracks left by the tapping elements.
  • Fig. 3.H1 (if you consider only the central part in heavy type) and/or in general perpendicular to the main direction of the incision.
  • edges of the thread are not necessarily in a straight line.
  • the darker part Y represents the thread, the grey rectangle X the shaft of the screw.
  • the detail 3J(1) shows sides (a,b) and (b,c) of the triangle, each one with a length of zl, representing the edges of the thread of the screw seen in section. If a unitary value is assigned to each side the surface is proportional to 2:
  • 1.A is a three dimensional drawing of a screw focusing on the thread; 1.As shows a section through the same screw.
  • 3.H1 shows the same screw on which, on one of the two sides of the thread, an incision has been made in accordance with the initial phase as described relating to
  • Figures 3.J show in greater detail the sections of the screws referred to in the preceding paragraphs and in all of them Y represents the thread and X the central shaft of the screw.
  • 3J(1) is the section of 1.A in which the points (a,b,c) describe the outline of the section of the spiral of the thread.
  • the detail zl shows the length of the side of the section; in other words,
  • zl a,b 3J(2) is the section corresponding to the case 3.l(sl) (see above) in which it can be seen that
  • 3.J(3) is the section corresponding to case 3.l(s2) in which it can be seen that
  • a typical implant screw has a thread with sides of around 0.45 mm, and these sides can be assumed for the sake of simplicity to be in a straight line; therefore in the first application of Procedure 1 segments of 0.15 mm would be obtained, in the second application around 0.05, in the third around 0.017, that is 17 micrometers, or microns; this is the same as the thickness of a thin hair, therefore well within the bounds of today's technology.
  • the incision in this invention can take the form of isolated hollowing out in whatever shape or profile as shown in Figs. 4.M and 4.N, insets (5) and (6).
  • Protruding elements of varying shape can be added afterwards, as can be seen in 2.E1(4), 2.E2(4), 2.E3a, 2.E3b, 2.F1(5), 2.F2a(5), 2.F2b(5), 4.N(4).
  • This invention has a possible solution to this problem, introducing tapping elements onto the surface of the thread and/or the uncovered parts of the shaft, theoretically at any point on the surface.
  • Such elements are able to cut into the bone surrounding the screw during fitting of the implant, in this way increasing the hollow volume and the area available in the chambers where new bone can be formed.
  • Fig. 1.B one side
  • 2.C both sides
  • they can be single or multiple, and also of different sizes.
  • FIG. 1.B An example of a series of three tapping devices in a row with increasing sizes is in Fig. 1.B, whose sections can be seen 1.B(s1 ), 1.B(s2), 1.B(s3).
  • FIG. 2.D shows in section in Fig.2.D1 .
  • the tapping devices can also be on the shaft, as shown in Fig.4.N, detail
  • protruding elements such as those shown as an example in Figs. 2.E1(4), 2.E2(4), 2.E3a, 2.E3b, 2.F1(5), 2.F2a(5), 2.F2b(5), 4.N(4) can contribute to the increase in the area of requirement B.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Epidemiology (AREA)
  • Dentistry (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Surgery (AREA)
  • Developmental Biology & Embryology (AREA)
  • Neurology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Prostheses (AREA)

Abstract

L'invention concerne une vis pour implantation osseuse présentant une interface os-implant augmentée, caractérisée en ce qu'au moins un côté de la vis est profilée.
EP07717679A 2006-03-06 2007-03-05 Vis pour implantation osseuse a interface os-implant augmentee Withdrawn EP1996103A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITBL20060010 ITBL20060010A1 (it) 2006-03-06 2006-03-06 Impianto con superficie frattale per incremento della superficie macroscopica di contatto con l'osso per l'implantologia endoossea osseointegrata
ITBL20060013 ITBL20060013A1 (it) 2006-03-23 2006-03-23 Vite per impianto osseo ad aumentata interfaccia impianto - osso
PCT/IT2007/000159 WO2007074498A2 (fr) 2006-03-06 2007-03-05 Vis pour implantation osseuse a interface os-implant augmentee

Publications (1)

Publication Number Publication Date
EP1996103A2 true EP1996103A2 (fr) 2008-12-03

Family

ID=38068767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07717679A Withdrawn EP1996103A2 (fr) 2006-03-06 2007-03-05 Vis pour implantation osseuse a interface os-implant augmentee

Country Status (2)

Country Link
EP (1) EP1996103A2 (fr)
WO (1) WO2007074498A2 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20080967A1 (it) 2008-05-23 2009-11-24 Salvatore Longoni Metodo di progettazione e/o selezione di un dispositivo e/o materiale impiantabile in tessuti del corpo umano o animale e dispositivo e/o materiale cosi' ottenuto
IT1398289B1 (it) * 2009-10-01 2013-02-22 Ornaghi Luigi & C S N C Di Ornaghi Giuseppe Ed Angelo Impianto dentale con migliorate caratteristiche di osteointegrazione
LT2814402T (lt) * 2012-02-13 2018-12-27 Medical Facets Llc Briaunuotas kaulų varžtas
ES2611883T3 (es) * 2012-05-29 2017-05-11 A.B. Dental Devices Ltd. Un implante dental dentado
TWI613992B (zh) 2016-12-28 2018-02-11 財團法人工業技術研究院 骨植入物
US11382724B2 (en) 2017-10-11 2022-07-12 Evollution Ip Holdings, Inc. Three-dimensional stabilization thread form for dental implants
US12121276B2 (en) 2020-11-19 2024-10-22 Rtg Scientific, Llc Fastening devices, systems, and methods
US12121271B2 (en) 2021-02-09 2024-10-22 Rtg Scientific, Llc Femoral fixation devices, systems, and methods
US20220249131A1 (en) 2021-02-09 2022-08-11 Rtg Scientific, Llc Fastening devices, systems, and methods
US12357355B2 (en) 2021-08-10 2025-07-15 Rtg Scientific, Llc Bone fixation devices, systems, methods, and instruments

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW409568U (en) * 1999-12-10 2000-10-21 Wang Chau Ran Vertebra fixing resetting device
CA2505850C (fr) * 2002-11-13 2011-01-04 Synthes (U.S.A.) Vis d'interference pour facette articulaire
US20050060039A1 (en) * 2003-09-11 2005-03-17 Jean-Maxwell Cyprien Shoulder glenoid prosthesis with method and tools for implanting it

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007074498A3 *

Also Published As

Publication number Publication date
WO2007074498B1 (fr) 2008-01-10
WO2007074498A2 (fr) 2007-07-05
WO2007074498A3 (fr) 2007-11-22

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