What Is a Dental Crown Made Of? A Guide to Materials

Dental crowns are one of the most commonly used restorations in modern dentistry. Yet many patients aren't sure what a crown actually is - or what it's made from. If you've been told you need a crown and want to understand your options, this guide is for you.

Whether you're restoring a damaged tooth, covering an implant, or protecting a tooth after root canal treatment, the material used matters. The right choice can affect how your crown looks, how long it lasts, and how it feels in everyday use.

At IDD Dental Lab, a trusted dental lab in NZ, we work closely with dental clinics to fabricate crowns that match each patient's clinical needs and aesthetic goals. Understanding the materials available is a good first step.

What Is a Dental Crown?

A dental crown is a cap that fits over a damaged or weakened tooth. It restores the tooth's shape, size, and function while protecting it from further damage.

Crowns can be used to:

• Protect a cracked or broken tooth

• Restore a tooth following root canal treatment

• Cover a dental implant

• Improve the appearance of a severely discoloured or misshapen tooth

• Support a dental bridge

  
  

The material your crown is made from will influence how natural it looks, how strong it is, and how well it suits your specific tooth.

Common Dental Crown Materials

1. Ceramic-Fused-to-Metal Crowns

Ceramic-fused-to-metal crowns have a metal base with a ceramic layer on top. They've been used in dentistry for decades and remain a practical choice for many patients.

A dental lab in NZ skilled in this technique uses the metal foundation to create exceptional strength, then bonds ceramic to the outer surface. The result is a crown that's both beautiful and strong, making it suitable for nearly any tooth location.

Advantages:

• Stronger than all-ceramic options in some applications

• The ceramic surface can be colour-matched to surrounding teeth

• Well-established track record in clinical use

  
  

Considerations:

• The metal base may show as a grey line near the gum over time

• Not always the first choice for highly visible front teeth

• Less translucent than modern ceramic alternatives

PFM crowns are often used for back teeth where durability is a priority.

2. All-Ceramic / All-Ceramic Crowns

All-ceramic crowns are made entirely from ceramic material, with no metal core. They're popular for front teeth because they closely mimic the natural translucency of enamel.

Advantages:

• Natural-looking appearance

• No risk of a metal line showing near the gum

• A suitable option for patients with metal sensitivities

  
  

Considerations:

• May be more prone to chipping under heavy biting forces compared to some other materials

• Not always recommended for back molars in high-stress areas, depending on the clinical situation

Your dentist will assess whether an all-ceramic crown is appropriate based on the location of the tooth and your bite.

3. Zirconia Crowns

Zirconia is a type of ceramic material known for its strength and durability. It has become one of the more widely used crown materials in recent years, particularly for back teeth.

Advantages:

• Very strong and resistant to chipping or fracture

• Can be tooth-coloured, making it more aesthetic than metal

• Biocompatible - generally well tolerated by gum tissue

• Can be used in a variety of clinical situations

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Considerations:

• Some earlier forms of zirconia were very opaque, though modern high-translucency zirconia offers improved aesthetics

• Due to its hardness, it may place more wear on opposing natural teeth in some situations - something your dentist will consider

  
  

Zirconia crowns are a common choice at dental labs in NZ for patients who need both strength and a natural appearance.

4. Metal Crowns (Gold or Base Metal Alloys)

Metal crowns - including gold alloy and other metal alloys - are among the most durable crown options available. They've been used successfully in dentistry for many years.

Advantages:

• Extremely durable and long-lasting with proper care

• Require less tooth removal than some other crown types

• Rarely chip or fracture

• A practical choice for out-of-sight back teeth

  
  

Considerations:

• The metallic colour is noticeable, making them less suitable for front teeth

• Patient preference often determines whether a metal crown is acceptable aesthetically

  
  

Some patients specifically request gold crowns for their back teeth because of their reliability over time.

5. E-Max (Lithium Disilicate) Crowns

E-Max is a pressed glass-ceramic material that has gained popularity for its combination of aesthetics and moderate strength.

Advantages:

• Highly aesthetic - closely replicates the look of natural teeth

• Good translucency, especially suitable for front teeth

• Reasonably strong for anterior and some posterior applications

  
  

Considerations:

• Not always the preferred choice for high-load posterior teeth depending on the bite

• A clinical assessment is needed to determine suitability

  
  

E-Max crowns are often used in cosmetic dental work where achieving a natural appearance is important.

How Are Dental Crowns Made?

Most dental crowns are fabricated in a dental laboratory. The process typically involves:

1. Impression or digital scan - Your dentist takes a mould or 3D scan of your prepared tooth.

2. Lab fabrication - The crown is custom-made at a dental lab to match your tooth's shape and shade.

3. Fitting and adjustment - The crown is checked for fit, bite alignment, and appearance before being permanently cemented.

   
   

The quality of the crown depends on both the clinical preparation and the precision of the lab work. A skilled dental lab in NZ will fabricate each crown to close tolerances, helping ensure a good fit and a natural result.

How Long Do Dental Crowns Last?

Crown lifespan varies depending on the material, the tooth's location, your oral hygiene habits, and how much pressure the crown is under.

With good care, many crowns can last 10 to 15 years or longer. Some patients have well-maintained crowns that last well beyond that. However, crowns are not permanent restorations - they may eventually need to be replaced.

To help extend the life of your crown:

• Brush twice daily and floss regularly

• Avoid using your teeth to open packaging or bite hard objects

• Wear a night guard if you grind your teeth

• Attend regular dental check-ups

  
  

Your dentist can monitor your crown over time and let you know if any issues arise.

FAQ

What is the most natural-looking crown material?

All-ceramic, E-Max, and high-translucency zirconia crowns are generally considered to offer the most natural appearance. They closely mimic the colour and translucency of tooth enamel.

The best material for aesthetics depends on the tooth location and your individual situation. A dentist can advise which option is most suitable after an examination.

Is zirconia better than metal for crowns?

Zirconia is generally stronger than traditional metal, which makes it a practical option for back teeth that endure more biting force. Traditional all-metal crowns can sometimes offer slightly better translucency, which may matter more for front teeth.

The "better" material depends on clinical needs, tooth position, and patient preference. Treatment outcomes can vary depending on individual circumstances.

Can I choose what material my crown is made from?

In most cases, yes - though your dentist will guide you based on clinical factors such as the tooth's location, the bite, and how much tooth structure remains.

Your preferences around aesthetics and budget may also play a role. Discussing the options during a consultation helps ensure the chosen material suits both function and appearance.

Does the dental lab matter when it comes to crown quality?

Yes. A crown's quality depends on the skill and materials used during fabrication. A dental lab in NZ that uses well-sourced materials and precise techniques will produce a dental crown that fits well, looks natural, and functions correctly.

Many dental clinics work with a trusted local lab to ensure their patients receive consistent, high-quality restorations.

Conclusion

Understanding what dental crowns are made of can help you feel more informed during discussions with your dentist. Each material - from zirconia to E-Max-to-fused-to-metal - has its own strengths, and the right choice depends on your clinical situation and personal preferences.

If you have questions about crowns or other dental restorations, speaking with a registered dental professional is the best starting point. A personalised treatment plan can be discussed during a consultation based on your specific needs.

IDD Dental Lab is a dental lab in NZ committed to fabricating precise, high-quality dental restorations for clinics across the country. We work with a range of materials to support the individual needs of each patient case.