A dental crown is a tooth-shaped “cap” that is placed over a tooth — to cover the tooth to restore its shape and size, strength, and improve its appearance.
WHY ID DENTAL CROWN NEEDED ?
- 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
- 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 misshapened or severely discolored teeth
- To cover a dental implant
- To make a cosmetic modification
NEED OF CAPS IN CHILDREN –
Children may need a cap to –
- Save a tooth that has been so damaged by decay that it can’t support a filling.
- Protect the teeth of a child at high risk for tooth decay, especially when a child has difficulty keeping up with daily oral hygiene.
- Decrease the frequency of sedation and general anesthesia for children unable because of age, behavior, or medical history to fully cooperate with the requirements of proper dental care.
In such cases, a pediatric dentist is likely to recommend a stainless steel crown.
WHAT MATERIALS ARE USED TO MAKE THE CROWNS ?
Crowns can be made of stainless steel, metals such as gold and other alloys, porcelain fused to metal, all ceramic, all resin, etc.
METAL CROWNS –
Metals used in these crowns include gold alloy and other alloys such as nickle chromium or palladium.
Compared to other crowns less tooth structure needs to be removed while preparing these crowns and wear of opposing tooth is minimal in this.
Only disadvantage of this crown is its metallic color.
PORCELAIN FUSED TO METAL –
These crowns can be color matched with the adjacent teeth unlike the metal crowns.
Compared to the metal crowns it requires more tooth cutting and causes more wear of the opposing tooth.
Sometimes the porcelain in these crowns may chip off showing the metal undernath
Typically a metallic grey line is seen in these crowns over the period of time as the gums recede.
ALL CERAMIC CROWNS –
These crowns are esthetically better than metal fused to porcelain crowns.
These are a good option for people who are allergic to metals and front teeth.
However, they are not as strong as procelain fused to metal crowns and cause little more wear of the opposing tooth than others.
ALL RESIN CROWNS –
These are less expensive and are more prone to fractures than any other type of crowns.
They wear down over a period of time.
These crowns are mostly used as temporary crowns.
TEMPORARY CROWNS VERSUS PERMANENT CROWNS –
Temporary crowns can be made in the dental office itself whereas, permanent crowns need to be fabricated in the lab.
Materials used for temorary crowns include acrylic, composite resins, etc
Temporary crowns are used to restore the tooth until the permanent crown is fabricated by the dental lab.