Crowns are 360 degree replacement of the tooth enamel as well as some dentin, to restore its shape and size, strength, and improve its appearance. Also called caps, crowns can be used to make crooked smile appear straighter or to repair broken or damaged teeth. A crown is also placed on an implant to replace a missing tooth. These are often used side by side with veneers in a full mouth restorative treatment.
Why are Dental Crowns Needed?
Dental crowns may be needed in the following situations:
- To protect a weak tooth (for instance, from decay) from breaking or to hold together parts of a cracked tooth
- To restore an already broken tooth or a tooth that has been severely worn down or a RCT treated tooth.
- To cover and support a tooth with a large filling when there isn’t a lot of tooth left
- To hold a dental bridge in place
- To cover misshapen or severely discoloured teeth
- To cover a dental implant
- To make a cosmetic modification
- In children if the cavity is big or after RCT
Types of Crowns available at Modern Dental Care
- Metal Free Ceramic CEREC Crowns
- Stainless Steel for Children
- Precious Alloy
- Acrylic (Temporary) CEREC crowns
Metal Free Crowns (Full Ceramic / All Ceramic )
All-ceramic or all-porcelain dental crowns provide better natural colour match than any other crown type and may be more suitable for people with metal allergies. All-ceramic crowns are a good choice for all indications. Dental offices like us at Modern Dental Care have the software and hardware and the ability to produce a crown in one visit with no need for a temporary. These crowns are made using a Digital Impressions and state of the art chair side CAD-CAM system called CEREC from Dentsply Sirona.
Stainless Steel Crowns
Stainless steel crowns are prefabricated crowns that are used on primary (MILK) teeth or young permanent teeth primarily as a temporary measure. This protects the tooth or filling while a permanent crown is made from another material. For children, a stainless steel crown is commonly used to fit over a primary tooth that’s been prepared to fit it. This covers the entire tooth when the decay extends to more than one third of the tooth and protects it from further decay. These are also placed on RCT treated primary tooth. When the primary tooth comes out to make room for the permanent tooth, the crown comes out naturally with it. In general, stainless steel crowns are used for children’s teeth because they don’t require multiple dental visits to put in place and so are more cost- effective than custom-made crowns and prophylactic dental care needed to protect a tooth without a crown.
Precious Alloy Crowns
Precious Metals used in crowns include gold alloy, other alloys (for example, palladium), or a base-metal alloy (for example, nickel or chromium). Less tooth structure needs to be removed with precious metal crowns. Also tooth wear to opposing teeth is kept to a minimum. Precious alloy withstands biting and chewing forces well and probably last the longest in terms of wear down. Also, metal crowns rarely chip or break. The metallic colour is the main drawback. Metal crowns are a good choice for out-of-sight molars
Porcelain fused to Metal Crowns: These look like natural teeth are stronger and can be used in both anterior and posterior region. Since two layers of materials are involved these are more bulky. Requires more tooth material to be removed to placeMetal Free Crowns : More aesthetic than porcelain fused to metal crowns. Less bulky so less tooth materials reduced. Different materials available for anterior and posterior indications. More expensive than porcelain fused to metal crowns. Metal margins are nor visible.
TrendsMore people worldwide are opting for Metal Free or All Ceramic crowns because of better aesthetics and ability to mimic natural tooth, high strength and durability, different materials for different indications.