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What's New

D.T. Light-Post Illusion X-RO

DT Light-Post Illusion X-RO

D.T. Light-Post® Illusion® X-RO® is RTD’s new fiber post innovation. It combines our (patent pending) color-on-demand Illusion technology with an exclusive, extra radiopaque (patent pending) fiber; developed by RTD over 5 years’ time, specifically for this clinical application. These combined technologies meet in our famous Double-Taper (D.T.) shape. It is available in 4 size-related colors.

Radiopacity of the X-RO is 50% greater than previous generations of D.T. Light-Posts (Fig. 1), to reach 3.4mm or 340% of Aluminum equivalent (ISO Standard #4049). 

X-RO fibers also utilize a proprietary silane coupling agent that increases the bond between the fiber and the epoxy matrix. The new fiber improves Flexural Strength (Fig. 2)* by at least 200MPa, and maintains high fatigue resistance** (10 000 000 Cycles).

Improved surface roughness, increases push-out (bond) strength to the post by nearly 30%* (Fig. 3) This eliminates any need for chair-side silane coatings.

*Internal data available upon request - ** Data from manufacturer - *** Complete studies available at

X-RO Fiber Development
Design Development Story
Mechanical Properties

  • Flexural Strength
    (ISO 14125)
  • Interlaminate Shear Strength
    (ISO 14130)
  • Radiopacity
    (ISO 4049)
  • Fatigue Strength**
    (RTD’s protocol)
  • 1800 MPa

  • 60-75 MPa

  • 3.4 mm or 340% Al Equivalent (ISO 4049)

  • >10 Million Cycles Without Breaking

DT Light-Post Illusion X-RO

Features and Benefits

  • Features

  • Proprietary silane coupling agent
    on exclusive X-RO fibers
  • New X-RO fiber increases radiopacity
    of the post to 300% of Aluminum**
  • Increased surface roughness
    during manufacture
  • Intrinsic Illusion
    technology color-coding
  • Color disappears when seated;
    becomes translucent
  • Color re-appears
    on demand
  • Double taper or
    double conicity
  • High Tensile, Shear strength &
    proven Fatigue Resistance
  • Translucent after
    clinical placement
  • Passed ISO Cytotoxicity, intradermal,
    systemic toxicity, genotoxicity
    and hypersensitivity testing
  • Elastic Modulus (20GPa @ 30 deg.)
    similar to dentin
  • Benefits

  • Flexural strength is increased to
    1800 MPa*, the highest in the market
  • Easier diagnostics. Highest
    radiopacity on the market
  • NO NEED for chairside silane or surface treatments,
    and push-out bond strength is increased by 33%***
  • Easy post size and brand identification;
    colors matched with corresponding drills
  • Aesthetic; use under
    any composite, inlay or crown
  • Removal, if ever
    necessary, is easier
  • Optimal adaptation and
    conservative preparation
  • Durability and
    clinical success
  • Aesthetics and
    light transmission
  • Ensures complete biocompatibility
    and safety. Fiber posts cannot corrode
    like stainless steel & base alloys
  • Helps prevent
    root fracture

Clinical Case



Fiber Posts

Fiber Posts

for severely damaged endodontically-treated teeth

Fiber Products


for periodontal splinting and reinforcement of acryllic and composite prostheses



for core build-up, cementation, bonding and splinting