>Like NATURE does it!

ENA HRi nano-hybrid composite produces incredibly natural looking composite restorations. Only ENA HRi matches a natural tooth's optical properties to produce invisible restorations with invisible margins. Conceived and developed by the renowned Dr. Lorenzo Vanini, it is now used by leading clinicians world-wide and is the ultimate choice for the discriminating clinician.


ENA HRi was developed in Italy by Micerium S.p.A. based on the ideas, research and principles of Dr. Lorenzo Vanini.

The ENA HRi difference!

The key to ENA HRi esthetics is an exclusive patented enamel composite material. ENA HRi enamel composite refracts light like human enamel. This development creates invisible margins without the need to compensate by increasing bevels and increasing the thickness of dentin composite.

ENA HRi is the only composite material that has the same refractive index as natural enamel.

Composite Refractive Index



ENA HRi (Micerium)


Clearfill Majesty (Kuraray) 1.5320
Filtek Supreme (3M) 1.5270
Point 4 (Kerr) 1.5230
Esthet-X (Dentsply) 1.5210
Venus (Kulzer) 1.5210
Tetric Ceram (Ivoclar) 1.5195
Kalore (GC) 1.5132
Gradia Direct (GC) 1.4910
Herculite XRV (Kerr) 1.4830
Renamel Nano (Cosmedent) 1.4745

Complete clinical case with ENA HRi (step by step)

Click on the images below to enlarge

Courtesy of Dr. Carlos Zuñiga, C/ Instituto dental PGCA, paseo de la castellana 59, 28046, Madrid - SPAIN

The ENAMEL ONLY Technique:

Restored with only 1 HRi enamel shade

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ENA HRi Enamel is ideal as for all restorations that require replacement of only the enamel layer of the patient's tooth structure. The ENA HRi enamel system uses a simplified value-based shading system that mimics natural enamel, which is achromatic (has no hue/colour) and varies only in value.

  • UE1 - low value (darker)
  • UE2 - medium value
  • UE3 - high value (brighter)

The BASIC Technique:

Restored with only 1 HRi enamel & 1 HRi dentin shade

Click on the images below to enlarge and to see other cases

In addition to the three enamel shades of HRi, there are nine universal dentin shades available, making ENA HRi a complete restorative system. Because of HRi's unique optical properties, by using only one to two dentin shades and one enamel shade, you can achieve highly esthetic results in anterior and posterior restorations.

The MASTER Technique:

Restored with additional shades for opalescence, intensive and characterization

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The HRi complete system comes with the additional intensives and modifiers needed to achieve ideal results in the most esthetically challenging cases and when esthetics are essential. Three white intensives and two opalescent modifiers provide the clinician with a complete armamentarium, yet maintain the overall focus on simplicity that is evident in the ENA HRi concept.

ENA HRi enamel - Just like human enamel...

A thicker enamel increases the opalescent effect

Just like human enamel, thicker layers of ENA HRi increase in opalescence. This allows you to restore missing enamel by simply replacing it with an equal amount of ENA HRi - with no visible margins, no need for significant bevels, and no graying effect.

Only 3 Shades of Enamel

The ENA HRi system contains only 3 enamel shades, and these are related to the patient's age group. Young enamel is very bright [high value]. As patients approach middle age, this value decreases. The process continues as patients reach their senior years.

ENA HRi Technique - Invisible margins

Invisible margins, reproducing with ENA HRi the same thickness of the natural enamel. *Measurements refractive indices from the University of Fraunhofer Institute Dresden, on enamel shells natural and universal enamel ENA HRi.
ena thick




Low value enamel Medium value enamel High value enamel
Older patients Middle aged patients Younger patients


ENA HRi dentin - Just like human dentin...

ENA HRi has a fluorescent dentin

ENA HRi dentin shades are highly fluorescent and designed to work with ENA HRi enamel shades for desired results. One or two dentin shades are all that is needed to get the results seen in these pages. In nature, the dentin mass transmits its hue and chroma through an enamel mass, which completely surrounds the underlying dentin. This is exactly how a tooth is restored with ENA HRi.
ena fluo

Why traditional techniques don't work

If you are frustrated with spending precious time to produce a high level esthetic composite restoration, only to be disappointed in the result, it's not your fault. With traditional layering techniques, it's a hit-or-miss process.

Popular enamel composites produce a graying effect as they are applied in thicker layers, because their refraction index is not tuned to human enamel. The only way they achieve results is through a complicated and unpredictable layering technique. Even if successful under certain lighting conditions, these restorations are subject to metameric failure.

Traditional restorations
leave visible margins


Previous solutions
are too complicated


Physical properties

ENA HRi is truly a universal nano-hybrid composite offering not only great esthetics but exhibits superior physical properties in 3 out of 5 important categories.
Product name Vickers

ENA HRi (Micerium)






Premise (Kerr) 520 117 8824 405 40
Herculite (Kerr) 600 144 8450 368 45
Simile (Pentron) 660 150 13770 423 41
Cerem X (Dentsply) 536 121 10556 347 32
Filtek Supreme (3M) 823 160 13300 407 51
Evo Ceram (Vivadent) 515 120 8720 385 n/a

Abrasion resistance

Rel. wear factor [ 200 000 cycles ]

ENA HRi shows superior resistance to wear – it is designed for both simple and complex direct and indirect restorations.
ena abrasion

Like nature
does it!
extra low
“No Bubbles”
extra low
Nano composite

Fusion of a flowable
composite and adhesive
Products that make sense!