PREAT Fiber Technology – Orthodontics
What is it?
eFiber is a scientifically proven solution for composite and acrylic resins. Cases have been published in over many different publications detailing the 15 years of research and hundreds of clinical cases in collaboration with both foreign and domestic universities.
eFiber is impregnated with both PMMA and BIS-GMA (light cure) to allow the fibers to bond with light cure composites, acrylic, and etched enamel (28 MPa of strength). eFiber is indicated for light cure indirect and direct procedures. See eFiber Main Page
Why to use fiber reinforcement?
- Prevent Stress Cracks from starting before they begin
- Increase fatigue resistance
- Increase flexural strength
- Improve Esthetics–the fibers are transluscent; no unsightly metal wires!
- Provide a restoration in ONE visit!
- Happy patients–eliminate broken restorations and chairside time
The three major factors of succesful reinforcement are:
- Position or Placement
- Direction and Bulk
It is often assumed that the strength of the reinforcement alone increases the toughness of the polymer. Kevlar, metal, and polyethylene are all very strong materials. However, since they do not bond to polymers, these materials create a “sandwich” effect wherein the thin layers of polymer are actually weaker than before “reinforcement” and do not stop the stress fractures.
Adequate adhesion of the fibers to the polymer matrix is the most important factor for strength. Bonding requires proper impregnation of the fibers.
Bondable eFiber creates a laminating effect and become integral to the parent resin.
Bonding requires proper impregnation of the fibers. Materials that bond result in a 100% strength increase in fatigue resistance and an 8x increase in flexural strength over non-reinforced materials. (Vallittu PK. J Prosthet Dent 2004). Fracture is a combination of fatigue and flexural stresses.
Polyethylene fibers, metal, and kevlar do not bond to polymers. These materials create two thinner, weaker, prone-to-break layers of polymer around the mechanically retained reinforcement. This gap between reinforcement material and polymer also harbors bacteria. The two SEM’s below show the bonding of impregnated e-glass fiber with polymer compared to the lack of bonding of plasma coated polyethylene fiber with polymer.
SEM of PMMA impregnated e-glass fiber
SEM of plasma coated polyethylene fiber
The translucent, aesthetic e-glass fibers allow for this optimum exterior placement–to stop the crack before it begins. The bonding and ability to grind and polish the fiber eliminate the annoying “fraying” of other reinforcement materials (FIG 1).
Materials that lack aesthetics and can not be polished–polyethylene, kevlar, metal–must be buried deep inside the prosthesis and do not materially increase (FIG 2) either flexural or fatigue strength.
The e-glass fiber allows the user to finish, polish, grind, reduce, and adjust the prosthesis. This allows for a smooth finish, eliminating a rough surface that will irritate the patient. This smooth finish also allows for superior hygiene, as bacteria adheres poorly to smooth surfaces.
Direction and Bulk
Fiber reinforcement should always be placed perpendicular to the potential fracture forces.
The unidirectional–like eFiber–is stronger than (multi-directional) mesh due to the bulk of fiber strands included in each bundle. The fiber is ideal when the direction of the stresses is known.
What are the advantages of Preat eFiber and Mesh?
Strength (e-glass fibers and bonding!)
Easy to grind and finish…stop breakage before it begins
Bonding to all compositeand acrylic resins
Light cure or self cure
Two types of materials–mesh and fiber
Easy to handle; no special tools needed—Improve productivity
Great esthetics….materials are translucent when activated/wetted
Chairside technique can be applied to limit the number of patient visits
When to use eFiber & Mesh?
Repair of Full and Partial Dentures
Reinforcement or Strengthening of New Full or Partial Dentures
Reinforced “Flippers” or Other Removable Prosthetics
Intra Oral Splinting
Reinforcing the attachment area of an overdenture
Thin palate maxillary dentures
Non-invasive bondable esthetic temporary or provisional restorations for single tooth implants
Non-metallic “Maryland” type bridges
Reinforced temporary or provisional bridges
Reinforced TMJ splints
Reinforced sleep apnea appliances
Reinforced and bondable orthodontic appliances
Quick, easy and strong repairs of full and partial removable dentures
Strong, bondable, reinforced inlay/onlay bridges
Reinforced bruxism appliances and night guards
Intra oral direct bonded periodontal splints (occlusal, lingual, or labial)
Pedodontic space maintainers
All of the above procedures can be done with the eFiber starter kit.
eFiber Starter Kit
- 45cm of Perma Mesh
- 10cm eFiber C&B 1.6mm
- 10cm eFiber Perio 1.2mm
- Bonding Adhesive (White)
- Wetting Agent (Black)
- Flowable Composite w/ extra tips
- Goats Hair Polishing Wheel
- F8 Silicone Cutter/Polisher
Refills of all material are available individually.
eFiber Ortho Kit
The eFiber Ortho Kit includes two 10cm units of eFiber 1.2mm, one 2mL syringe of flowable composite, one silicon tool, an instructional DVD, and user instructions.
ORTHO contains 2000 individual glass fibers, for an effective diameter of 1.2 mm.
No special tools are needed to work with this unique PMMA and Bis-GMA impregnated glass fiber.