It can be both painful and unsettling to have a crown come loose or fall out due to age, but in most cases, it can be successfully replaced provided that it is not damaged in the removal process.
1. Tooth decay
The crown itself is not prone to tooth decay, but the natural tooth underneath is. The decay usually forms near the gumline at the point where the crown meets the natural tooth. Depending on the severity of the decay, your dentist may choose to save the crown or replace it. Still, the decay must be removed and the resulting cavity filled. If the crown is in good condition, it can be replaced on the tooth, or a new crown made.
2. Consumed too many sticky items
Sticky foods are generally harmful to restored or replaced teeth. Eating too many chewy foods such as toffees can cause the crown to loosen gradually until it eventually falls off. Fortunately, the damage can be easily fixed by simply sticking the crown back on the tooth with cement.
3. Weakened cement bonding the crown to the tooth
The crown is made from hard materials that can tolerate years of biting and chewing forces. However, the cement holding it to your teeth is a weak point that can cause the crown to come loose over time, and ultimately fall off. This problem can be fixed by cementing the crown back onto the tooth.
4. Weakened natural tooth structure
Crowns are typically placed on strong, healthy teeth. But preparing a tooth for the crown destroys a portion of the healthy tooth structure. If the capped tooth is severely worn down, such that there isn’t enough space for the crown to be properly cemented, then the crown won’t last as long as it should. This is usually a problem with the molars.
5. Breakage of the crown due to trauma or heavy grinding/clenching
As strong as the crown material may be, it is also susceptible to excessive forces that can break it and cause it fall off the tooth. Usually, the damage starts with a small crack that gradually extends until the crown weakens enough and falls off.
Frequently Asked Questions
Who do crowns need to be replaced?
Some of the circumstances that may require the replacement of old crowns include:
- Cracked or broken crown
- Discolored crown
- Decay forming on the margins of the crown
How does a dentist remove a crown to replace it?
When can a crown not be replaced?
Can a permanent crown be removed?
A temporary crown can be easily removed with mild adhesive to allow placement of a permanent crown. But if the permanent crown is compromised due to chipping, breakage, decay, or any other situation that necessitates crown replacement, it can still be removed using a strong dental adhesive to weaken the cement used to bond the crown to the tooth.