Signs Your Dental Crowns Needs to be Replaced or Repaired
Why do dental crowns need to be replaced?
There can be a variety of reasons why a dental crown might need to be replaced. Some of them are:
A) Tooth decay has formed at the edge of the crown.
While a dental crown cannot decay the tooth on which the crown is cemented certainly can. If dental plaque is allowed to accumulate on a tooth in the region where the crown and tooth meet, a cavity can start.
While there can be a lot of variables with this type of situation, the worst-case scenario for your dental crown is that in order for your dentist to be able to get at and remove the decay the crown will need to be taken off and replaced with a new one.
B) The dental crown has become worn excessively.
Dental crowns are not necessarily significantly more resistant to wear than your own natural teeth, nor is it in your best interest that they should be. The ideal dental crown would be one made out of a material that has the same wear characteristics as tooth enamel. This way neither the dental crown nor your teeth would wear the other excessively.
Dental crowns can wear out, especially in those cases where a person has a habit of clenching and grinding their teeth. A dentist will sometimes detect a small hole on the chewing surface of a dental crown in that area where it makes contact with an opposing tooth (meaning a tooth that touches on the crown when you bite). Since the seal of the crown has now been lost your dentist will probably recommend that a new crown should be made, before that point in time when dental plaque has seeped in underneath the crown and has been able to start a cavity.
C) The dental crown has broken.
Dental crowns can break, or more precisely the porcelain component of a dental crown can fracture. Some dental crowns are made in a fashion where their full thickness is porcelain (all-ceramic dental crowns). If this is the case then if the crown breaks it will most likely have broken all of the ways through, thus compromising the seal of the crown and necessitating its replacement. Even with a less catastrophic fracture, it seems likely that the esthetics or function of the crown could be compromised, thus providing a reason why the crown should be replaced.
D) The esthetics of the crown has become objectionable.
Some dental crowns are replaced because, from a cosmetic standpoint, their appearance is no longer pleasing. Two situations where the cosmetic aspects of a dental crown can change with time are:
E) The dental crown’s edge has become visible and it has a grey appearance.
As time passes the gum line of a tooth on which a dental crown has been placed will sometimes recede. This is especially likely in those cases where diligent brushing and flossing have not been practised. If enough recession takes place the edge of the dental crown, which was originally tucked out of sight just under the gum line, will become visible. Many times this edge of the crown will have a grey appearance.
Inherent to porcelain-fused-to-metal dental crowns (related to their construction) is the fact that the very edge of these crowns will typically show some darkness (a hint of the grey metal that lies underneath the porcelain). If enough gum recession occurs this dark edge will become visible, thus spoiling the cosmetic appearance of the crown.
An all-porcelain dental crown does not have the same inherent edge darkness that a porcelain-fused-to-metal crown does. Gum recession can, however, reveal that portion of the tooth that lies beyond the edge of an all-porcelain crown (the tooth’s root surface). Usually, the colouration of this part of the tooth is darker (possibly even significantly) than the colour of the dental crown, thus spoiling the overall cosmetic appearance of the tooth.
F) The colour of the dental crown no longer matches its neighbouring teeth.
Also related to the cosmetic appearance of a dental crown, there can be times when, as years have elapsed, the colour of the crown no longer closely matches the shade of its neighbouring teeth. In these cases, it is not the colour of the porcelain crown that has changed but instead, the neighbouring teeth have stained and darkened.
There can be two solutions to this situation. The dental crown can be replaced with a new one that more closely matches the current colour of its neighbouring teeth. Another solution could be to use a teeth whitening process so to attempt to return the neighbouring teeth to the colour they were when the dental crown was originally placed.
For Dental Crown Treatment, Call Vogue Smiles Melbourne 9629-7664, for all your General & Cosmetic Dentistry treatment in Melbourne