Ivoclar Vivadent is a global leader in dental material science, headquartered in Liechtenstein. Known for revolutionizing aesthetic dentistry, Ivoclar systems—most notably IPS e.max® and IPS Empress®—provide dental restorations with natural optical translucency, high flexural strength, and long-term marginal integrity.
Medical review provided by Dr. Nilgün Başar, Professor of Periodontology at Dent of Istanbul.
What Is Ivoclar Vivadent Technology?
Ivoclar Vivadent specializes in advanced glass-ceramic materials, pressable ceramics, and CAD/CAM milling blocks designed for cosmetic and restorative dentistry. Unlike traditional porcelain-fused-to-metal (PFM) restorations that exhibit dark metal margins at the gumline, Ivoclar glass-ceramics are completely metal-free, allowing light to pass naturally through the tooth structure.
Core Ivoclar Material Systems
1. IPS e.max® Lithium Disilicate
IPS e.max is a lithium disilicate glass-ceramic renowned for its balance of beauty and strength. With a biaxial flexural strength of 500 MPa, e.max is significantly stronger than traditional feldspathic porcelain (100 MPa). It is widely specified for anterior veneers, thin laminates, partial crowns (inlays/onlays), and single anterior crowns.
2. IPS Empress® System
IPS Empress is a leucite-reinforced glass-ceramic optimized for ultra-aesthetic anterior veneers. With a flexural strength of approximately 160 MPa and exceptional vitality, IPS Empress closely mimics the natural opalescence and fluorescence of natural tooth enamel.
3. Ivoclar Digital CAD/CAM Blocks
Using CAD/CAM technology, Ivoclar milling blocks allow dental technicians to mill restorations with sub-micron marginal accuracy. This precise fit minimizes micro-leakage and prevents secondary caries beneath the restoration.
Material Property Comparison Table
| Property | IPS e.max Lithium Disilicate | IPS Empress Glass-Ceramic | Zirconia (3Y-TZP) |
|---|---|---|---|
| Flexural Strength | 500 MPa | 160 MPa | 1,200 MPa |
| Translucency Level | Very High (Enamel-like) | Highest (Natural Vitality) | Moderate to High |
| Minimum Thickness | 0.3 mm - 0.5 mm | 0.6 mm | 0.8 mm - 1.0 mm |
| Primary Indication | Veneers, Anterior Crowns, Inlays | Anterior Cosmetic Laminates | Posterior Crowns & Multi-Unit Bridges |
| Cementation Method | Adhesive Resin (Variolink Esthetic) | Adhesive Resin Cement | Conventional or Adhesive |
Anatomical & Tooth Preparation Depth Standards
To achieve long-lasting adhesive bond strength, tooth preparation for Ivoclar ceramics adheres to strict anatomical guidelines:
- Enamel Preservation: At least 50% of the prepared tooth surface must remain within natural enamel. Adhesive bonding to enamel provides over 30 MPa of bond strength, whereas bonding to dentin is weaker.
- Occlusal & Incisal Reduction: Requires 1.5 mm of incisal clearance for IPS e.max crowns and 1.0 mm for partial coverage restorations (onlays).
- Margin Design: A smooth 0.5 mm rounded chamfer or deep shoulder margin is prepared around the gumline to prevent stress concentrations in the glass-ceramic matrix.
Clinical Protocol & Bonding Timeline
- Visit 1: Shade Matching & Micro-Prep (Day 1): Teeth are prepared under magnification. Digital intraoral scans record micro-margins, and temporary veneers are placed.
- Laboratory Crafting (Days 2 - 4): Authentic Ivoclar lithium disilicate ingots are pressed or CAD/CAM milled and customized with natural surface characterization.
- Visit 2: Adhesive Try-In & Etching (Day 5): Restoration fit is verified. The inner ceramic surface is etched with 5% hydrofluoric acid for 20 seconds and treated with Monobond Plus silane.
- Adhesive Cementation (Day 5): Variolink Esthetic dual-cure resin cement bonds the restoration under light polymerization, creating a permanent molecular union.
Frequently Asked Questions
1. How long do Ivoclar IPS e.max restorations last?
Clinical studies show that IPS e.max lithium disilicate restorations have a 10-year survival rate exceeding 96%, with many lasting 15 to 20+ years when supported by good oral hygiene and routine check-ups.
2. Are Ivoclar crowns resistant to staining from coffee, tea, or wine?
Yes. Glazed Ivoclar glass-ceramics feature a non-porous surface structure that is completely impervious to dark food stains, beverage discoloration, and tobacco smoke.
3. What is the main difference between IPS e.max and traditional PFM crowns?
PFM (Porcelain-Fused-to-Metal) crowns rely on a dark metal base that can cast a grayish shadow near the gumline as gums age. IPS e.max is 100% metal-free, providing natural light transmission and optical vitality.
4. Are Ivoclar veneers prone to chipping or fracturing?
No. With a biaxial flexural strength of 500 MPa, IPS e.max is nearly 5 times stronger than traditional feldspathic porcelain veneers, making it highly resistant to normal biting and chewing forces.
5. How are Ivoclar restorations bonded to natural enamel?
Restorations are bonded using adhesive resin cement (such as Variolink Esthetic) following hydrofluoric acid etching and silanization, creating a durable chemical and mechanical bond with natural enamel.
To evaluate whether Ivoclar IPS e.max veneers or crowns are suitable for your smile transformation, contact Dent of Istanbul for a detailed digital consultation.
