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WO2006009631A1 - Instruments dentaires revetus - Google Patents

Instruments dentaires revetus Download PDF

Info

Publication number
WO2006009631A1
WO2006009631A1 PCT/US2005/020502 US2005020502W WO2006009631A1 WO 2006009631 A1 WO2006009631 A1 WO 2006009631A1 US 2005020502 W US2005020502 W US 2005020502W WO 2006009631 A1 WO2006009631 A1 WO 2006009631A1
Authority
WO
WIPO (PCT)
Prior art keywords
dental
dental instrument
coating
reduced friction
elongate
Prior art date
Application number
PCT/US2005/020502
Other languages
English (en)
Inventor
Ajay Kumar
Original Assignee
Innovadontics
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 US10/993,207 external-priority patent/US20050282112A1/en
Application filed by Innovadontics filed Critical Innovadontics
Publication of WO2006009631A1 publication Critical patent/WO2006009631A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C3/00—Dental tools or instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C3/00—Dental tools or instruments
    • A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C3/00—Dental tools or instruments
    • A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
    • A61C3/025—Instruments acting like a sandblast machine, e.g. for cleaning, polishing or cutting teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C5/00—Filling or capping teeth
    • A61C5/40—Implements for surgical treatment of the roots or nerves of the teeth; Nerve needles; Methods or instruments for medication of the roots
    • A61C5/42—Files for root canals; Handgrips or guiding means therefor
    • 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
    • A61C8/0089—Implanting tools or instruments

Definitions

  • a root canal preparation can involve pulp removal, cleaning of the root canal walls, and shaping the canal walls.
  • Cavity preparation, including pulp removal, can be performed using one or more instruments, such as, for example, files, bits, burrs, reamers, and end mills. These instruments can be configured to bore and/or cut. The instruments can be moved manually, mechanically, or by some combination of manual and mechanical methods.
  • An endodontic handpiece can be coupled to an instrument to impart rotational motion, reciprocal motion, sonic movements or ultrasonic movements.
  • dental burrs and end mills can be used to prepare a titanium dental implant.
  • the dental burr has a carbide tip.
  • the dental burrs can become extremely hot. This can increase the likelihood of thermal bone necrosis.
  • a dental instrument comprises an elongate dental tool having a proximal portion, a distal portion, and a cutting portion located near the distal portion. A reduced friction coating is applied to the elongate dental tool at least at the cutting portion.
  • a method for treating a patient comprises providing an elongate dental tool having a proximal portion, a distal portion, and a cutting portion having a reduced friction coating applied to at least the cutting portion.
  • the elongate dental tool is inserted into the mouth of the patient to perform a dental procedure.
  • a method for making a dental instrument comprises providing an elongate dental tool having a proximal portion, a distal portion, and a cutting portion. A reduced friction coating is applied to at least the cutting portion.
  • a coating is used on a dental instrument, hi one embodiment, the coating is a diamond-like carbon coating.
  • a diamond-like carbon coating depending on the deposition conditions and the tribological system, can have different outstanding tribological properties, hi one embodiment, a diamond-like carbon coating comprises a hydrogenated amorphous carbon (a-C:H). In another embodiment, a diamond-like carbon coating comprises a hydrogen free tetrahedral amorphous carbon (ta-C).
  • a coated sealer when a coated sealer slides against a tooth surface, the formation of a transfer layer on a metallic part of the sealer protects the sealer from excessive wear, minimizes damage to the tooth, reduces the likelihood that the sealer will fail, and is easily cleanable.
  • Metals by nature are hydrophilic, which can make cleaning difficult, however, some coatings, e.g., a diamond-like carbon coating, are hydrophobic, hi one embodiment, biological tissue does not adhere to a diamond-like carbon coating, so bacteria and viruses are not readily able to cling to the surf ace of the sealer.
  • a dental tool having a coating e.g., a diamond-like carbon coating
  • a coating e.g., a diamond-like carbon coating
  • the coating decreases wear significantly by rapid transfer of heat from hot spots caused by localized factional heating.
  • a diamond-like carbon coating has a coefficient of friction of between about 0.05 and about 0.15. hi another embodiment, the coefficient of friction can be greater than about 0.15. hi another embodiment, the coefficient of friction can be less than about 0.05. hi one embodiment, the coating on the tool acts to minimize frictional wear.
  • FIGURE 1 is a perspective view of one embodiment of a coated sealer.
  • FIGURE 2 is a perspective view of one embodiment of a coated file.
  • FIGURE 3 is a perspective view of one embodiment of a coated burr.
  • coated dental instruments such as, for example, dental sealers, files, burrs, and reamers used to cut (inside or on the surface), drill and/or clean the natural tooth surface.
  • Calculus is a rough, porous, and plaque-retentive substance that adheres to the root surface of a tooth.
  • Dental sealers are devices that are used to remove calculus from the a tooth.
  • a sealer can be hand driven and/or mechanically driven (e.g., ultrasonic and sonic) for easy removal of calculus from deep within the periodontal pocket.
  • FIGURE 1 illustrates an exemplary embodiment a sealer 100.
  • the sealer 100 is configured be placed between a tooth and surrounding gum and bone.
  • the sealer 100 may be vibrated to remove calculus deposits bonded to the tooth without unnecessarily traumatizing the surrounding gum and bone.
  • the sealer 100 also aids in the ability of the dental provider to tactually sense the location of calculus deposits.
  • a fluid spray can be used to aid in cooling the working area and in removing loosened calculus.
  • the dental sealer 100 comprises a handpiece 104 and a tool 106 coupled or attached to the handpiece 104.
  • the tool 106 preferably is positioned adjacent a tooth for use.
  • the tool 106 has a diameter 102 along the length of an abrasive portion 108, e.g., a cutting portion, that is sufficiently small to fit within the periodontal pocket between the gingival, or gum, and the bone.
  • the diameter 102 of the abrasive portion 108 of the tool 106 preferably is less than or equal to about 0.014 inches. In another embodiment, the diameter 102 of the abrasive portion 108 is greater than or equal to about 0.0065 inches.
  • the tool 106 can have a generally conical shape along a portion of its length.
  • the 106 tool having the abrasive portion 108 with the diameter 102 of less than or equal to about 0.014 inches advantageously removes calculus from the tooth surface while providing minimal damage to the surrounding tissue and bone.
  • the relatively small diameter 102 of the tool 106 advantageously results in greater flexibility of the tool 106.
  • the reduced friction coating 110 is an amorphous diamond coating, hi another embodiment, the reduced friction coating 110 is a Teflon coating. In another still embodiment, the reduced friction coating 110 is a ME-92 coating. In another embodiment, the reduced friction coating 110 is a sputter gold coating, where the gold acts as a solid lubricant. In still other embodiments, Other reduced friction coatings can also be used and/or the coating described above may be combined with each other or with other coatings. .
  • Coating the cutting edge 108 with a reduced friction coating 110 advantageously enhances the longevity of the cutting edge 108 and makes it easier to remove organic material from the cutting edge 108, e.g., during cleaning.
  • Application of the reduced friction coating 110 also improves the cutting efficiency of the sealer 100.
  • the coating 110 can cover a portion of the sealer 100, such as the cutting edge 108, or it can extend along the whole length of the sealer 100. hi one particular embodiment, at least the tip or apex 112 of the sealer 100 is covered by the coating 110.
  • the coating 110 has a thickness of between about 0.1 ⁇ m and about 150 ⁇ m. hi another embodiment the coating 110 has a thickness of between about 0.5 ⁇ m and about 100 ⁇ m. hi yet another embodiment, the coating 110 has a thickness of between about 5 ⁇ m and about 50 ⁇ m. Although the above thicknesses are presently preferred it should be appreciated that other thickness may also be used depending upon the application. In addition, with respect to other coatings, these will tend to be slightly thicker in nature than the amorphous diamond coatings.
  • the coating 110 is formed using physical vapor deposition. In another embodiment, the coating 110 is formed using chemical vapor deposition. In another embodiment, the coating 110 is formed using an anodizing process. In another embodiment, the coating 110 is formed using a combination of deposition techniques or anodizing processes.
  • the coating preferably comprises between about 1 atomic percent hydrogen and about 55 atomic percent hydrogen. In another embodiment, an amorphous diamond coating comprises between about 3 atomic percent hydrogen and about 45 atomic percent hydrogen. In another embodiment, an amorphous diamond coating comprises between about 5 atomic percent hydrogen and about 35 atomic percent hydrogen.
  • a diamond-like carbon coating depending on the deposition conditions and the tribological system, can have different outstanding tribological properties.
  • a diamond-like carbon coating comprises a hydrogenated amorphous carbon (a-C:H).
  • a diamond- like carbon coating comprises a hydrogen free tetrahedral amorphous carbon (ta-C).
  • Amorphous diamond coating, or another reduced friction coating can be applied to many different types of instruments besides sealers.
  • Such instruments include but are not limited to sealers, files, bits, burrs, reamers, and end mills, as will be described further below.
  • Such instruments can have one or more of the following exemplary surface conditions.
  • the instrument may be formed from a variety of materials, such as, a metallic materials (e.g,. steel, steel alloys, aluminum, titanium, titanium alloys) and/or metal composites. Instruments made of metallic materials may be heat treated, passivated, (e.g., treated or coated in order to reduce the chemical reactivity of a surface, or to protect against contamination, or increase electrical stability).
  • the tip of the instrument can be roughened.
  • the instrument can be formed in a variety of matters such as casting or machining.
  • the tip 112 of the sealer 100 has a smaller diameter tip and longer working length compared with traditional sealers. In this manner, the tip 112 can provide better access to deep probing sites and more efficient subgingival instrumentation.
  • the tip 112 may be coated with a reduced friction coating 110 to impart structural stiffness.
  • the tip 112 the coating comprises an amorphous diamond coating as described above. The coating 110 may therefore impart stiffness and rigidity to the thin tip 112 while maintaining a high aspect ratio.
  • the coefficient of friction of a reduced friction coating preferably is less than that of a nickel-titanium file, which has a coefficient of friction of approximately 0.4. Accordingly, in some embodiments, a reduced friction coating has a coefficient of friction of less than about 0.4. In some embodiments, a reduced friction coating has a coefficient of friction of less than about 0.3. In one preferred embodiment, the coefficient of friction for these coatings is between about 0.05 to about 0.15.
  • Periodontal instrumentation preferably effectively removes plaque and calculus, while limiting root surface damage. Attempts to completely remove calculus deposits can require extensive instrumentation and can result in significant amounts of cementum and dentin loss, thereby inducing dentinal hypersensitivity and increased prevalence of pulpitis.
  • One way to limit the likelihood of creating extensive iatrogenic root surface damage during periodontal debridement is to perform a limited number of multiple light overlapping strokes with a sealer to achieve a clean root.
  • a sharp sealer generally is more effective at removing plaque and calculus.
  • the reduced friction coating 110 described above on the sealer tip 112 advantageously protects the tip 112 and helps to maintain the tip sharpness during the functional life of the sealer 100.
  • the dental sealer 100 with the reduced friction coating 110 can also reduce the transmission of unwanted bacteria and viruses.
  • Metals by nature are hydrophilic, which can make cleaning difficult, however, in one embodiment, the coating 110 preferably is hydrophobic.
  • biological tissue does not adhere to a hydrophobic coating, so bacteria and viruses are not readily able to cling to the surface of the sealer 100.
  • the amorphous diamond coating 110 has a relatively low coefficient of friction, and thus has a lower affinity to have plaque adherence to the surface compared to uncoated stainless steel tip sealers and diamond impregnated dust sealers. The surface of a diamond impregnated dust sealer is especially prone to having plaque adhere between the diamond dust particles, making the cleaning of the instrument difficult between the patients.
  • the coated sealer 100 is laser etched along the tip to provide visual indicial that indicates to the dental provider how deep the sealer 100 has gone into the bone or periodontal pocket.
  • the coating 110 advantageously can also provide a dark background against which white laser etched depth markings are visible.
  • white laser etched marks provide excellent visibility against the black background of the coating 110 along the axial length of the cutting edge 108 of the sealer 100.
  • the coating 110 can also provide a visual indication of when to change the sealer. That is, as the coating 110 wears off, the underlying metal becomes visible indicating that the sealer 100 should be replaced.
  • the coating 110 preferably prevents or reduces the likelihood of a patient having an adverse reaction to a dental instrument comprising nickel.
  • Endodontic instruments e.g., files, bits, burrs, reamers, and end mills
  • These endodontic instruments are typically made out of nickel titanium and/or stainless steel. Both of these materials have a high coefficient of friction, hi some cases, the high coefficient of friction causes the apical portion of small diameter instruments to get stuck inside the root canal.
  • the instruments can break in the middle, exhibiting green stick fracture. This can happen when a handpiece is applying torque to the tip of the instrument, while the apical portion is jammed inside the root canal because of tapering nature of root canal. Additionally, use of the instruments in the preparation of root canals can generate heat.
  • an endodontic instrument e.g., a file, a gates-glidden burr
  • a cutting edge coated with reduced friction coating such as, an amorphous diamond coating.
  • the instrument preferably is adapted for removing pulp material from a tooth.
  • FIGURE 2 is an exemplary embodiment of such an endodontic instrument. Specifically, FIGURE 2 illustrates an exemplary dental file 200 having a length corresponding to at least the combined length of an operative coronal portion and an operative middle portion of a tooth.
  • the file 200 preferably has a handpiece (not shown), an apical portion 212, and a cutting portion 208 on the apical portion 212.
  • the file 200 is inserted into the operative coronal portion and the operative middle portion of the tooth. Pulp material is removed from the operative coronal portion and the operative middle portion by flexing the file 200 to urge the cutting portion 208 of the instrument against root canal surfaces.
  • the apical portion 212 preferably is coated with a reduced friction coating 210. In one embodiment, the coating 210 covers at least the apical portion 212. In some embodiments, the coating 210 can cover a length of the instrument between the apical portion 212 and a latch connection 214 generally opposite the apical portion 212, e.g., from the apical portion 212 to the latch connection 214.
  • the latch connection 214 preferably is configured to be coupled to the handpiece. In some embodiments, providing a coating 210 on the latch connection 214 can reduce the chance that the file 200 will get stuck inside the handpiece.
  • the coating 210 is an amorphous diamond coating.
  • another suitable reduced friction coating 210 can be used, such as, for example, those described above with reference to FIGURE 1.
  • a physical vapor deposition technique is used to sputter coat the file with gold particles.
  • the file is placed in an anodizing bath to coat the file with a hard type II anodized coating.
  • the instrument preferably is lowered in an anodizing bath, and a layer of oxide with special friction reducing properties is grown.
  • the coefficient of friction of a reduced friction coating preferably is less than that of a nickel-titanium file which has a coefficient of friction of approximately 0.4. Accordingly, in some embodiments, a reduced friction coating has a coefficient of friction of less than about 0.4. In some embodiments, a reduced friction coating has a coefficient of friction of less than about 0.3. In some embodiments, a reduced friction coating has a coefficient of friction of less than about 0.2. In some embodiments, a reduced friction coating has a coefficient of friction between about 0.05 and about 0.3. hi some embodiments, a reduced friction coating has a coefficient of friction between about 0.05 and about 0.15. In one preferred embodiment, the coefficient of friction for these coatings is about 0.1.
  • the reduced friction coating 210 can prevent or minimize the fracture of endodontic instruments.
  • Files 200 that are coated with a reduced friction coating 210 will advantageously be less likely to break during a procedure because reducing the coefficient of friction makes it less likely that the instrument will get stuck inside the root canal.
  • Reduced friction coatings 210 can also reduce the temperature rise inside the pulp to prevent or limit temperature damage to the tissues.
  • a dental tool having a coating e.g., a diamond-like carbon coating
  • a diamond-like carbon coating has a coefficient of friction of between about 0.05 and about 0.15. In another embodiment, the coefficient of friction can be greater than about 0.15. In another embodiment, the coefficient of friction can be less than about 0.05.
  • the coating on the tool acts to minimize factional wear.
  • the coating process preferably involves coating endodontic files with amorphous diamond using a filtered cathodic arc plasma source.
  • an amorphous diamond coating applied to the cutting edge 208 of the file 200 has at least about 30 percent sp3 carbon bonding, a hardness of at least about 35 gigapascals and a modulus of at least about 300 gigapascals.
  • an amorphous diamond coating applied to the cutting edge 208 of the file 200 has at least about 40 percent sp3 carbon bonding, a hardness of at least about 45 gigapascals and a modulus of at least about 400 gigapascals.
  • the file 200 can be mechanically honed before coating. In one embodiment, there is no interlayer between the substrate and the amorphous diamond coating. In other embodiments an interlayer can be provided.
  • Dental providers typically use endodontic files multiple times. As described above with reference to dental sealers, application of a coating to the instrument provides a visual indicator that it is time to change the files as the coating wears off.
  • Dental burrs and end mills are also used in dental procedures, ENT applications, and orthopedic surgery.
  • dental burrs, and end mills can be used to cut dentin and prepare dental implants, e.g., titanium dental implants.
  • Dental burrs and end mills can be made out of cemented carbide applied on top of stainless steel substrata. Surface-coated cemented carbides are generally poor conductors of heat. During use, high temperatures can cause the cemented carbide and stainless steel to debond.
  • FIGURE 3 shows an exemplary burr 300 with a shaft 306 and an apical portion 312.
  • the apical portion 312 can have different cutting configurations 308 in modified embodiments as will be appreciated by those of skill in the art.
  • the apical portion 312 can have a round burr, end mill, twist drill, cylindrical cutting, or other cutting end 308 configurations.
  • the apical portion 312 preferably is coated with a reduced friction coating 310, such as, for example, an amorphous diamond coating as described above. Other coatings, such as those described herein, can also be used.
  • the shaft 306 can also be coated to minimize the chances of the burr 300 getting stuck inside a handpiece (not shown).
  • the material of the burr can be stainless steel, steel with impregnated carbide or any other suitable material.
  • the amorphous diamond coating advantageously has a high coefficient of thermal conductivity. Accordingly, the risk for debonding between the cemented carbide and stainless steel is reduced. Additionally, the amorphous diamond coated tool has enhanced strength and toughness, as well as enhanced wear resistance, due to lubricious nature of the hard amorphous diamond coated film. A dental burr that has an amorphous diamond coating can also conduct heat away from the patient and can thus reduce the increase in temperature and reduce the likelihood of thermal bone necrosis.
  • the instrument is coated with other types of coatings that can be utilized to minimize the coefficient of friction.
  • tools can be coated with reduced friction coatings such as type II anodized coating or sputter coated gold coating.
  • the coefficient of friction of cemented carbide is approximately 0.5.
  • a reduced friction coating has a coefficient of friction of less than about 0.5.
  • a reduced friction coating has a coefficient of friction of less than about 0.4.
  • a reduced friction coating has a coefficient of friction of less than about 0.3.
  • a reduced friction coating has a coefficient of friction of less than about 0.2.
  • a reduced friction coating has a coefficient of friction between about 0.05 and about 0.3. In some embodiments, a reduced friction coating has a coefficient of friction between about 0.05 and about 0.15. In a presently preferred embodiment, the coefficient of friction of these coatings is about 0.1.
  • Coating the cemented carbide tooling with diamond coating, or another suitable coating advantageously enhances the longevity of the tool. Additionally, most dental providers use dental burrs multiple times. As the diamond coating wears off, the color of the burr changes from black to silver, providing a visual indicator that it is time to change the burr.
  • an instrument comprises an elongate rotary cutting member.
  • the cutting member has an axially forward cutting surface, a flute, and a fluted land.
  • the cutting member preferably comprises a deposited amorphous diamond coating or other friction reducing coating on top of a carbide and/or stainless steel tooling.
  • the deposited amorphous diamond coating preferably is bonded to the substrate and has an average thickness of between about 2 micrometers and about 100 micrometers.
  • other tools can be coated for use in dental, orthopedic or ENT applications.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial 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)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Neurosurgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

Dans un mode de réalisation, un instrument dentaire (100) comprend un outil dentaire (106) allongé doté d'une partie proximale, d'une partie distale et d'une partie de coupe (108) située à proximité de la partie distale. Un revêtement (110) à friction réduite est appliqué sur l'outil dentaire allongé sur au moins la partie de coupe (108).
PCT/US2005/020502 2004-06-17 2005-06-10 Instruments dentaires revetus WO2006009631A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US58110104P 2004-06-17 2004-06-17
US60/581,101 2004-06-17
US58426004P 2004-07-01 2004-07-01
US60/584,260 2004-07-01
US10/993,207 US20050282112A1 (en) 2004-06-17 2004-11-19 Coated dental instruments
US10/993,207 2004-11-19

Publications (1)

Publication Number Publication Date
WO2006009631A1 true WO2006009631A1 (fr) 2006-01-26

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ID=34972354

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Application Number Title Priority Date Filing Date
PCT/US2005/020502 WO2006009631A1 (fr) 2004-06-17 2005-06-10 Instruments dentaires revetus

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WO (1) WO2006009631A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101516950B1 (ko) * 2013-11-06 2015-05-04 주식회사 디오 어버트먼트 프로파일 드릴장치
CN109223235A (zh) * 2018-08-31 2019-01-18 蔡宇辉 一种磨牙棒的智能取放装置
WO2021047301A1 (fr) * 2019-09-09 2021-03-18 四川大学 Fraise à profondeur d'arrêt démarquée, préparée destinée à être utilisée avec une plaque de guidage dentaire imprimée en 3d préparée

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074451A (en) * 1980-03-04 1981-11-04 Litton Industrial Products Flexible dental drills
US5035618A (en) * 1989-03-21 1991-07-30 Les Fils D'auguste Maillefer, Societe Anonyme A Ballaigues Instrument for the treatment of dental root-canals
US5244390A (en) * 1992-01-14 1993-09-14 Implant Innovations, Inc. Dental scaling instrument
US6234796B1 (en) * 1998-06-05 2001-05-22 Vdw Gmbh Dental root canal treatment
US20030049586A1 (en) * 1998-11-12 2003-03-13 Ajay Kumar Diamond-like carbon coated dental instrument

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074451A (en) * 1980-03-04 1981-11-04 Litton Industrial Products Flexible dental drills
US5035618A (en) * 1989-03-21 1991-07-30 Les Fils D'auguste Maillefer, Societe Anonyme A Ballaigues Instrument for the treatment of dental root-canals
US5244390A (en) * 1992-01-14 1993-09-14 Implant Innovations, Inc. Dental scaling instrument
US6234796B1 (en) * 1998-06-05 2001-05-22 Vdw Gmbh Dental root canal treatment
US20030049586A1 (en) * 1998-11-12 2003-03-13 Ajay Kumar Diamond-like carbon coated dental instrument

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101516950B1 (ko) * 2013-11-06 2015-05-04 주식회사 디오 어버트먼트 프로파일 드릴장치
CN109223235A (zh) * 2018-08-31 2019-01-18 蔡宇辉 一种磨牙棒的智能取放装置
CN109223235B (zh) * 2018-08-31 2020-08-28 闫小霞 一种磨牙棒的智能取放装置
WO2021047301A1 (fr) * 2019-09-09 2021-03-18 四川大学 Fraise à profondeur d'arrêt démarquée, préparée destinée à être utilisée avec une plaque de guidage dentaire imprimée en 3d préparée

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