Crowns and bridges
Modern cosmetic dentistry cannot be imagined without the use of metal-free ceramic crowns (tooth caps) in prosthetic rehabilitation. Unlike traditional metal-ceramic crowns, which are made from a metal alloy base with a ceramic overlay, metal-free crowns and metal-free bridges do not contain “black” metal as a base, which results in a more natural appearance. In addition to aesthetics, the biocompatibility of the material itself is incomparable to metal alloys.
We are witnessing an increase in patients with allergic reactions, especially to metal alloys containing nickel. Due to the cytotoxic effects of nickel, its use is being phased out. Metal-free ceramics are characterized by light translucency, which closely mimics the natural tooth, contributing to the natural look of the restoration. The computerized precision in fabrication enhances the durability of the restoration and ensures a precise fit on the tooth, which also benefits oral hygiene and prevents the development of decay under the prosthetic work.
The precision of fitting metal-free ceramic crowns and bridges is very important and impacts the longevity of the restoration. The modern approach we offer to our patients guarantees perfect fitting of crowns on prepared supporting teeth. In our practice, we use the latest generation scanner to take impressions and apply a complete digital protocol. The digital protocol for fabricating metal-free crowns, which includes Smile Design, gives patients the opportunity to participate in the design of their future smile. Our patients can see how their teeth will look and even influence the appearance of the prosthetic restorations with their suggestions. Our goal is a satisfied patient whose smile will last for years.
In addition to crowns on natural teeth, we also offer the option of metal-free crowns and bridges on implants.
Non-metal crowns and their application
Ceramic crowns are typically used in the anterior region of the teeth when restoration is needed. They are most commonly used when there are large fillings that risk leading to fractures or the breaking off of the tooth, which could result in tooth loss.
Non-vital teeth that have darkened are also restored using metal-free crowns. It is recommended that teeth that have had the nerve removed and undergone root canal treatment be reinforced with crowns. This is done because a dead tooth loses its elasticity due to reduced nourishment, making it more prone to fractures. Another reason is that a treated tooth is weakened and has significantly less tooth structure, which also increases the risk of tooth damage or breakage.
What are the best systems for metal-free crowns?
Zirconia and E-Max are both highly durable materials that are biocompatible with human tissue. Both systems are excellent choices for the esthetic zone and meet both esthetic and biomechanical requirements.
Zirconia as a superstructure can fully mask the color of the tooth, allowing for color changes. On the other hand, E-Max is not able to cover the color as well due to its high translucency, making zirconia a better choice for this purpose. E-Max is also used for creating inlays, onlays, and veneers (facets).
Additionally, a zirconia crown can be placed on a metal superstructure of an implant (if appropriate), whereas E-Max cannot be used for this purpose.
What should be emphasized is that the esthetic property of both systems allows us to finish the crown edge at the gum line, rather than below the gum line. The advantage of this approach is that we avoid entering the gingival sulcus to hide the edge of the crown, which could potentially harm the periodontium (gums) of the tooth. Your dentist will always provide the right recommendation for material selection after a clinical examination and assessment of the situation.
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