Latest materials in orthodontic

• Nanotechnology

• Implants

• brackets

Nanotechnology in orthodontics

• Nanotechnology is the science of manipulating matter

measured in the nanometer, roughly the size of 2 or 3

atoms

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

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

Nonoparticle delivery

• From orthodontic elastomeric ligature

• They serve as a carrier scafflold for delivery of

nanoparticles that can be

• Anticariogenic

• Antiinflammatory

• Antibiotic drugs

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

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.

• Synthesis of fullerene-like tungsten disulfide

nanoparticles has allowed remarkable improvement of

friction and wear properties under different contact

conditions

• 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

• Niti substastrates were coated with IF-WS2 nonoparticles

film by electrdeposition procedure –

• 66% reduction of friction on coated substrates

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

• The ion Implanted TMA has also been known as “low-

friction” and is offered in different colors

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

• 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.

IMPLANTS

24

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

26

OnplantBlock & Hoffman(1995)NobelBioCare, USA

OnPlant

(soft-tissue side up)

OnPlant (hydroxyapatite

coated surface)

Diameter 8-10 mm.

27

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.

28

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

Complete absorption

• PGLA 75/25- 220 days

• PGLA 50/50- 180 days

• PGLA 82/18- 180-140 days

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

BRACKETS

(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!

Incognito™ Orthodontic Braces

• Orthodontic Braces are actually invisible teeth

braces placed behind your teeth using state-of-the-art

technology

Self-ligating brackets

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

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