Dr. Vikrant Kundu

BDS (Hons)
MDS ( Orthodontics )
CAIC ( Implantology Korea )
ADIC ( Implantology Israel )
CHIEF MENTOR, Mirell International

What is a Zirconia Crown

Zirconia or zirconium is the strongest material used in restoration dentistry and also the hardest known white ceramic in the industry. Zirconium Oxide is the zirconia used in dentistry.

Zirconium comes in the form of solid blocks of different sizes and shapes. It needs trailblazing computer systems like CAD/CAM systems for processing.

Like we said, its systems are too avant-garde for its applications, zirconia restorations and zirconia crowns are provided to patients who wish for excellent dental restorations. Zirconia crowns are presently favored over Full-gold crowns or traditional PFMs (Porcelain Fused to Metal) because of their superior strength, excellent aesthetics and imperishability. Zirconia crowns need chamfer or shoulder margins for outstanding outcomes. They may be concocted from solid complete-contour zirconia or from layered zirconia and can either be cemented or screw-retained.

What are the Benefits of Zirconia Crown?

With the advent of clinical industry, the emergence of Zirconium compound has recently gained attention as it has resulted in revolutionizing the dentistry. Because of its incredible characteristics, it can be employed for various purposes.

Zirconia is enormously hard, tough and durable. Presently it is the strongest material used in dentistry for creating robust dental crowns, dental brides, anchors, veneers and partial dentures.
Since it is a white ceramic with excellent crystalline characteristic, zirconium restorations are treated highly aesthetic as they do not obtain any metal in their composition.
Aesthetic porcelain can be used to layer the zirconia core structure to create the final shape and color of the tooth.
Zirconia crowns do not transmit hot and cold as that of conventional PFMs, which is very comfortable for patients.
Fracturing and chipping with the zirconium substructure are extremely rare.
It encourages a healthy tissue response.
It prevents darkening around the gingival area since no metal is used. This also removes the likeliness of metal margins getting revealed due to gum recession.
Crowns can be cemented in place using traditional bonding methods
Similar to gold, it is very well withstood by the body
It does not cause any allergic reactions. Therefore best for patients preferring to have metal-free restorations or with metal allergies.
It never erodes or tarnishes, because it is not a metal.
Because they are utilized by computer systems, zirconium based prostheses are largely precise and thereby reliable.

Are There Any Disadvantages of Having a Zirconia Crown?

There are minimal disadvantages linked to zirconia crowns.

  • Zirconia unfortunately is still very expensive. The required processing instruments and material itself lead to a good final cost
  • The hardness of the material has led to some challenges about friction against the tooth root and corroding down the opposing teeth. Timely checks, however, help to eliminate any possible complications to opposing teeth.
  • At the beginning, only bone-white substructures could be formed for zirconia crowns, which could occasionally contribute to issues in accomplishing an aesthetically-ideal appearance.
  • Now, however, the futuristic era of materials are pre-shaded and can be constructed to provide extremely aesthetic with minimal tooth reduction and naturally-perfect restorations, extending patient demands for high-quality work is a challenge!

Indications for Zirconia Crowns

  • Porcelain crown with zirconia substructure
    For restorations, almost any kind of fixed prosthetic restoration can be created using porcelain fused to zirconium. The structures are immensely tolerable, durable and have appealing aesthetics.

  • Zirconia against metal base restorations
    In this situation, zirconia core structure is covered with porcelain which is basically used for anterior (front) teeth where aesthetics is the priority.

  • Full zirconia restorations
    Since bond strength of layered porcelain merged to zirconia is not very powerful, crowns and bridges may be fully fabricated of the zirconia ceramic with no aesthetic porcelain covering on top.

  • Zirconia crowns and bridges
    The restorations are typically recommended for areas where aesthetics is not the priority.

  • Dental implants
    Dental plants are generally constructed of titanium alloys. The abutments fastened to the implants can be preconstructed from zirconia.

The implant supported denture can have a zirconia structure for best results. It will also allow having a full metal free implant construction.

Advantages of Zirconium Crowns over Porcelain Crowns or Gold crowns

Be that as gold crowns to be for many years in existence and well tolerated by the body, it is still preferable to give off that natural effect when you smile. Adding the fact that gold is metal and some people just avoid having metals in their internal parts.

Zirconium crowns are definitely 5 times robust and durable than porcelain crowns.

Porcelain crowns also require to be merged to a metal base and the metal is that black ugly line seen above the gums of people with porcelain crowns.

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