Dentaltown January 2017 - 88

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Unmatched Versatility
and Aesthetics

Obsidian lithium silicate ceramic
Obsidian lithium silicate ceramic is a state-of-the-art restorative material
that can be used for PFM, all-ceramic and chairside-milled cases. With this
versatility, Obsidian enables clinicians to prescribe a single material for virtually any indication in the mouth. A simplified workflow ensues, because using
Obsidian easily facilitates a cohesive appearance across the arch, even when
the oral situation demands multiple types of restorations.
Obsidian outperforms the competition, offering over four times more
flexural strength and twice as much chip resistance as traditional feldspathic
ceramics. Furthermore, the translucency and aesthetics of the material
match those of natural dentition, making Obsidian the optimal combination
of utility and beauty.

Pressed to metal
The latest release in the product line, Obsidian Pressed to Metal restorations are exceptional PFMs for today's clinician. Rather than fusing
feldspathic porcelain to cast metal, Obsidian lithium silicate
ceramic is pressed to laser-sintered understructures to
Before
form a modernized PFM. Each case is designed digitally and
fabricated through unique computer-controlled processes,
resulting in precise restorations.
The understructures are made through a method in
which a programmable laser beam strikes metal powder
to build the desired shape, layer by layer. The anatomy is
formed by heat-pressing lithium silicate into a 3-D-printed
After
mold. Finished Obsidian Pressed to Metal crowns and bridges
achieve far greater strength than their traditional PFM
predecessors. These natural-looking, chip-resistant restorations are ideal for covering dark preps and endodontic
posts. Indications include crowns and bridges anywhere in
the arch, and screw-retained and cemented implant restorations.

JANUARY 2017 // dentaltown.com

All-ceramic
Obsidian All-Ceramic restorations are made from the same lithium
silicate ceramic used for the pressed to metal restorations, meaning that
monolithic and ceramo-metal prostheses can be placed next to one another
with outstanding results. These all-ceramic restorations mirror the vitality
and translucency of natural dentition, and are indicated for individual anterior and posterior crowns, veneers, inlays, onlays and three-unit anterior
bridges.

Case presentation
by Anamaria Muresan, DMD, ME, CDT
A male patient presented to the Glidewell Laboratories operatory
unsatisfied with the mismatched appearance and chipped, uneven incisal
edges of his maxillary central incisors. The patient reported that he was so
unhappy with his current oral situation that he never smiled. We restored
his smile using Obsidian lithium silicate ceramic,
placing one pressed to metal crown and fi ve
veneers. Looking at the "Before" image, note that
tooth #8 appears gray because of previous root
canal treatment and the resulting metal post
showing through the all-ceramic crown.
When a patient presents with a metal post, my
rationale is to use a PFM to stop the show-through.
The Obsidian crown used here completely hid the
endodontic post without forcing me to select an
unaesthetic, dark shade in hopes of masking it. The
Obsidian crown on tooth #8 and Obsidian veneers
on #6, #7 and #9-11 easily match one another in
terms of shade and aesthetics. The patient was
thrilled with the outcome. ■

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Table of Contents for the Digital Edition of Dentaltown January 2017