Caps encase the entire visible portion of a tooth – from top of tooth to the gum line
A dental crown is a tooth-shaped “cap” that is placed over a tooth.
Why do you need one?
A tooth cap may be needed to:
- Protect a weak tooth (eg, from decay) from breaking or to hold together parts of a cracked tooth
- Restore an already broken tooth or a tooth that has been severely worn down
- Cover and support a tooth with a large filling when there isn’t a lot of tooth left
- Hold a dental bridge in place
- Cover misshaped or severely discolored teeth
- Cover a dental implant
- Cover a tooth that has been endodontically treated (had a root canal)
Materials that are used
Is one type of material better suited for specific dental problems?
Permanent caps can be made from all metal, porcelain-fused-to-metal, all resin, or all ceramic materials.
The Metals that are used in Caps
Metals used in crowns include gold alloy, other alloys (for example, palladium) or a base-metal alloy (for example, nickel or chromium). Compared with other dental cap types, less tooth structure needs to be removed with metal crowns, and tooth wear to opposing teeth is kept to a minimum. Metal caps withstand biting and chewing forces well and probably last the longest in terms of wear down. Also, they rarely chip or break. The metallic color is the main drawback. Metal crowns are a good choice for out-of-sight molars.
Porcelain-fused-to-metal in Crowns
Porcelain-fused-to-metal dental crowns can be color matched to your adjacent teeth (unlike the metallic crowns). However, more wearing to the opposing teeth occurs with this crown type compared with metal or resin crowns. The porcelain portion can also chip or break off. Next to all-ceramic Caps, porcelain-fused-to-metal crowns look most like normal teeth. However, sometimes the metal underlying the porcelain can show through as a dark line, especially at the gum line and even more so if your gums recede. These crowns can be a good choice for your back teeth.
All-resin Dental Crowns
All-resin dental crowns are less expensive than other dental cap types. However, they wear down over time and are more prone to fractures than porcelain-fused-to-metal crowns.
All-ceramic or all-porcelain dental crowns provide the best natural color match than any other crown type and may be more suitable for people with metal allergies. However, they are not as strong as porcelain-fused-to-metal caps and they may wear down opposing teeth a little more than metal or resin crowns. All-ceramic crowns are a good choice for front teeth.
Temporary versus Permanent Crowns
Temporary caps can be made in your dentist’s office whereas permanent crowns are made in a dental laboratory. Temporary crowns are made of acrylic or stainless steel and can be used as a temporary restoration until a permanent crown is constructed by the dental laboratory.
Betty Haberkamp, DDS, Head and Neck Institute, Cleveland Clinic, Ohio
What are dental-crowns/? Know Your Teeth, Academy of General Dentistry.
Schedule a FREE Consultation Call Today
Dr. William J. Cruse Family Dentistry Treats Routine Cleanings to
Advanced Dental Care.