Skip to main content

Natural beauty restored

Initial LiSi Block is a fully crystallized lithium disilicate block that delivers optimal physical properties without firing. This unique block features GC’s proprietary HDM (High Density Micronization) technology for CAD/ CAM dentistry to deliver high wear resistance, smooth margins and aesthetic final results. When used with the ONE SQIN technique – the paintable colour-and-form ceramic system – you can quickly and easily achieve more aesthetic results.

Save time
no firing required

Fully crystallized
lithium disilicate

Durable aesthetics
& natural opalescence

Perfect combo with

HDM technology for CAD/CAM dentistry

With LiSi Press, GC introduced the HDM (High Density Micronisation) technology. HDM uses equally dispersed lithium disilicate micro-crystals to fill the entire glass matrix rather than using traditional larger size crystals. The clinical efficiency of this technology has been proven after 5 years of clinical service.

GC has further developed HDM technology for CAD/CAM dentistry by optimizing the crystal size and glass matrix stiffness. Thanks to this new technology, good machinability, marginal integrity, polishability, and wear resistance are achieved at the same time. The result is a strong and easy-to-mill block that offers the same strength with or without firing.

Source: GC R&D, Japan, Data on file

Source: GC R&D, Japan, Data on file

Conventional lithium disilicate technology
(on the left side) (IPS e.max CAD)
compared to HDM technology for CAD/CAM
(on the right side) (Initial LiSi Block)

Improved glass matrix stiffness

for high mechanical strength

Smaller crystals

for easy milling & high wear resistance

Just Mill, Paint and Place

With GC Initial IQ ONE SQIN – the paintable colour-and- form ceramic system – you can quickly and easily achieve highly aesthetic results, comparable to conventionally layered restorations but with a significant time gain.

More accurate margins

Since Initial LiSi Block is already fully crystallised before milling, smooth and accurate margins are observed directly after milling.
When fired after ceramic painting & glazing, this great marginal accuracy is maintained.

Source: GC R&D, Japan, Data on file

Courtesy of MDT. D. Ibraimi, Switzerland

Choice of translucency in accordance with the indication

Polish, paint or microlayer, the choice is yours

Characterize with
Initial IQ Lustre Pastes ONE



L-2 White

L-3 Light Grey
for translucency effect


Adding natural fluorescence and gloss

Lustre Pastes ONE on Initial LiSi Block

Courtesy of Dr. Javier Tapia Guadix, Spain

Create colour, form and texture with Initial™ ONE SQIN

Initial LiSi Block

Painting with
Lustre Pastes ONE

Form & texture

Fired result
Autoglaze effect

ZTM Stefan Roozen, AU

Choose your preferred finishing procedure

Superior gloss can be obtained in few minutes by polishing only, and the restoration is then ready for luting. For sophisticated aesthetic cases, remarkable results can be achieved with GC Initial Lustre Pastes ONE and Initial Spectrum Stains.

Polish with standard burs

Diamond bur



Goat’s wheel

Final result

Courtesy of MDT L. Cavallo, Italy

Function meets aesthetics

I love the opalescence of Initial LiSi Block and as a consequence thereof the color stability and perfect matching.

Dr. Christian LampsonGermany

I’m totally excited about the natural opalescence and color matching of the HT version of Initial LiSi Block.

MDT Christian HannkerGermany

Courtesy of MDT Christian Hannker & Dr. Christian Lampson, Germany

Courtesy of MDT Marco Muttone, Dr. Alessandro Iorio, Italy

Natural opalescence

Initial LiSi Block is available in high translucency (HT) and low translucency (LT) and offers a natural opalescence in any light.

Initial LiSi Block restoration under direct and indirect light.

Courtesy of Dr. Javier Tapia Guadix, Spain

Courtesy of Dr. Javier Tapia Guadix, Spain

Courtesy of Dr. David Gerdolle, Switzerland

Cementation recommendation

Adhesive luting is recommended for Initial LiSi Block.
Both G-CEM ONE and G-CEM LinkForce from GC can be used for any type of indications using Initial LiSi Block.

Initial LiSi Block videos

Initial LiSi Block FAQ

Does Initial LiSi Block require a firing process?

Firing is not needed since Initial LiSi Block is a fully crystallized block. Restorations can be finished in one appointment by polishing only.

How many sizes are available?

Initial LiSi Block is available only in one size (14). Size of the block is 12.7 mm x 14.7 mm x 18 mm.

What kind of milling machine should be used?

Please use a wet type milling machine. Dry milling should not be used for this material.

Can I stain Initial LiSi Block?

Yes, Initial LiSi Block can be stained and glazed by using Initial Spectrum Stains and Initial Lustre Pastes ONE.

Can I layer Initial LiSi Block with porcelain?

No, Initial LiSi Block cannot be layered with porcelain. Difference in thermal expansion between porcelain and Initial LiSi Block may cause internal microcracks. However, it is possible to micro-layer with our Initial IQ SQIN ceramic.

Can I take the shade by using the colour of the block before milling?

The restoration colour will look different depending on the thickness and firing condition. Please consider the colour of the block before milling as a guide.


Order information

Related products

System set

Self-adhesive resin cement

Initial IQ Lustre Pastes ONE
3-dimensional paintable ceramic