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.

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) 1.6200
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
dr lorenzo vanini

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

Complete clinical case with ENA HRi (step by step)

Click the image below

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Restoration of anterior teeth using HRi (dentistry courtesy of Dr. Vaninni)

HRi enamel - Just like human enamel...

A thicker HRi enamel increases the opalescent effect

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

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Only 3 Shades of Enamel

The 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.

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

HRi dentin - Just like human dentin...

HRi has a fluorescent dentin

HRi dentin shades are highly fluorescent and designed to work with HRi enamel shades for desired results. One or two dentin shades are all that is needed to get the desire results. 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 HRi.

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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

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HRi Technique - Invisible margins

Invisible margins, reproducing with 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 HRi.

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Direct restoration on vital incisor video (6:29 min.)

The benefits of using HRi composite video (6:55 min.)

HRi - ENAMEL ONLY Technique:

Restored with only 1 HRi enamel shade

HRi Enamel is ideal as for all restorations that require replacement of only the enamel layer of the patient's tooth structure. The 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.

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SMALL CLASS IV - Courtesy of Dr. Lorenzo Vanini
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DIASTEMA - Courtesy of Dr. Lorenzo Vanini
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INCISAL EDGE - Courtesy of Dr. Michael J. Morgan
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INCISAL EDGE - Courtesy of Dr. Lorenzo Vanini
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SMALL CLASS IV - Courtesy of Dr. Todd Snyder
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POST-ORTHODONTIC TREATMENT - Courtesy of Dr. Lorenzo Vanini

HRi - BASIC Technique:

Restored with only 1 HRi enamel & 1 HRi dentin shade

In addition to the three enamel shades of HRi, there are nine universal dentin shades available, making 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.

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Courtesy of Dr. Carol Waldman
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Courtesy of Dr. Amir Chafaie
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Courtesy of Dr. Lorenzo Vanini
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Courtesy of Dr. Lorenzo Vanini

HRi - MASTER Technique:

Restored with additional shades for opalescence, intensive and characterization

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 HRi concept.

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Courtesy of Dr. Lorenzo Vanini
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Courtesy of Dr. Lorenzo Vanini
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Courtesy of Dr. Michael J. Morgan
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Courtesy of Dr. Lorenzo Vanini
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Courtesy of Dr. Michael J. Morgan
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Courtesy of Dr. Lorenzo Vanini

Physical properties

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) >700 170 14500 450 45
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 ]

HRi shows superior resistance to wear – it is designed for both simple and complex direct and indirect restorations.
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ena hri Like NATURE does it!
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