Latest materials in orthodontic · Latest materials in orthodontic •Nanotechnology •Implants...
Transcript of Latest materials in orthodontic · Latest materials in orthodontic •Nanotechnology •Implants...
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Latest materials in orthodontic
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• Nanotechnology
• Implants
• brackets
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Nanotechnology in orthodontics
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• Nanotechnology is the science of manipulating matter
measured in the nanometer, roughly the size of 2 or 3
atoms
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Nanocomposites
• Nonagglomerated discrete nanoparticles that are
homogeneously distributed in resins or coatings to
produce nanocomposites
• The nanofiller used include an aluminosilicate powder
having a mean particle size of 80 nm
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Impression materials
• Nanofillers are integrated in vinylpolysiloxanes,
producing a unique addition of siloxane impression
materials
• The material has better flow, improved hydrophilic
properties and enhanced detail precision
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Nonoparticle delivery
• From orthodontic elastomeric ligature
• They serve as a carrier scafflold for delivery of
nanoparticles that can be
• Anticariogenic
• Antiinflammatory
• Antibiotic drugs
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Orthodontic nanorobots
• Orthodontic nanorobots could directly manipulate the
periodontal tissues, allowing rapid and painless tooth
straightening, rotating and vertical repositioning within
minutes to hours
• Reconstructive dental nanorobots, using native biological
materials, could selectively and precisely occlude specific
tubules within minutes, offering patients a quick and
permanent cure
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Nanotechnology in wires
• The inorganic fullerene-like tungsten disulfide (IF-WS2)
nanoparticles were described first in 1992
Tenne R, Margulis L, Genut M, Hodes G. Polyhedral and cylindrical structures of
WS2. Nature 1992;360:444–5.
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• Synthesis of fullerene-like tungsten disulfide
nanoparticles has allowed remarkable improvement of
friction and wear properties under different contact
conditions
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• Coating was done by inserting in sol of ni-p, (IF-WS2)
• Frictional reduced by 54% with compared to uncoated
SS wire
Improved orthodontic stainless steel wires coated with inorganic fullerene-like nanoparticles of WS2
impregnated in electroless nickel–phosphorous film
M. Redlicha et al dental materials 2 4 ( 2 0 0 8 ) 1640–1646
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• Niti substastrates were coated with IF-WS2 nonoparticles
film by electrdeposition procedure –
• 66% reduction of friction on coated substrates
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Ion implantation
• This ion implantation process provides the niti and β-
titanium wires with a coating which has been
hypothesized to decrease surface roughness, and thereby
decrease frictional forces
• Reduce corrosion of the niti wires by limiting the release
of nickel ions from the wire over time
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• The ion Implanted TMA has also been known as “low-
friction” and is offered in different colors
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TiO2 coated wires(antibacterial wire)
• The orthodontic wires coated with the photocatalytic
TiO2 showed an antiadherent effect against S. mutans
compared with the uncoated wires
• The bacterial mass that bound to the TiO2- coated
orthodontic wires remained unchanged, whereas that of
the uncoated wires increased by 4.97%
• Furthermore, the TiO2-coated orthodontic wires had a
bactericidal effect on S. mutans and P. gingivalis
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• A diamond-like carbon coating on Niti archwire
• Nickel release could be reduced
Kobayashi, S.; Ohgoe, Y.; Ozeki, K.; Hirakuri, K.; Aoki, H. Dissolution effect
and cytotoxicity of diamond-like carbon coatings on orthodontic archwires. J.
Mater. Sci. Mater. Med. 2007, 18, 2263–2268.
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IMPLANTS
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Zygoma Anchor SystemsClerck ,Geerinckx,Siciliano-(2002 SurgiTec, Bruges, Belgium
Round bar (1.5 mm dia.)
Miniplate
Miniscrew (2.3 mm dia., Length 5-7 mm.)
Fixation screw
Fixation unit with vertical slot
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OnplantBlock & Hoffman(1995)NobelBioCare, USA
OnPlant
(soft-tissue side up)
OnPlant (hydroxyapatite
coated surface)
Diameter 8-10 mm.
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Graz Implant Supported System
Karcher and Byloff-(2000)
Miniplate frame
Oval cylindrical
projection
• Immediately loadable palatal implant.
• Rotational stability
• Implant-supported pendulum for patients with dental class II
dysgnathia and dental crowding.
• Distalization of all upper molars achieved within 8 months.
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Polyglycolic acid (PGA)
Poly-l-lactic acid(plla)
Copolymer of pure PLLA(82%)
And PGA(18%) is marketed as
LACTOSORB
Biodegradable Implants
Hashem et al –(2000)
Poly – Medics, UK
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Complete absorption
• PGLA 75/25- 220 days
• PGLA 50/50- 180 days
• PGLA 82/18- 180-140 days
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α-tricalcium phosphate coatings on titanium
subperiosteal
orthodontic implants
Application of α-tricalcium phosphate coatings on titanium subperiostealorthodontic implants reduces the time for absolute anchorage: a study usingrabbit femora .Ken NIWA1, Kiyotaka OGAWA1
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BRACKETS
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(Customized) Insignia Braces
• Inisgnia is the most advanced orthodontic treatment
technology currently available
• Insignia, a computerized system that combines digital
treatment planning with specially made brackets and
wires tailored to your specific dental anatomy
• 3D computerized preview of your new smile before
you begin treatment!
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Incognito™ Orthodontic Braces
• Orthodontic Braces are actually invisible teeth
braces placed behind your teeth using state-of-the-art
technology
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Self-ligating brackets
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Antimicrobial brackets
• Ag-Pt coatings on load-bearing orthodontic bracket
surfaces can provide suitable antimicrobial activity during
active orthodontic treatment.
• Ag ions are significant antimicrobials
Antibacterial effect of silver-platinum coating for orthodontic appliances Hwang-
Sog Ryu et al Angle Orthod. 2012;82:151–157
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Frictionless brackets
• Diamond-like carbon (DLC) coating on frictional and
mechanical properties of orthodontic brackets
• DLC films were deposited on stainless steel brackets
using the plasma-based ion implantation
Frictional and mechanical properties of diamond-like carbon-coated orthodontic
brackets. Takeshi muguruma the european journal of orthodontics 2011