Dentalnews (en)

Gum as a mirror of our entire health?

Gum as a mirror of our entire health? YES AND NO! Again and again you read scientific and non scientific articles about vitamin deficiency and it´s consequences. As a result some people take homeopathic medicine-a mistake most of the time! – 99% of gum diseases are attributed to plaque and not to a vitamin deficiency -in industrial countries! [...]

Reasons of parodontitis

– - – - – - – Most reasons of parodontitis The most reasons of parodontitis are: Plaque based on bad oral hygiene Plaque based on overlying crowns / bridge edges Plaque based on tooth displacement Plaque based on leak fillings Fortunately all these factors are treatable / modifable: optimise your tooth brushing by [...]

Parodontitis-oral rinse-useful?

Is an oral rinse useful for parodontitis? YES! An oral rinse is a useful purchase, unfortunately some doctors think it is not useful-with the argument that bacteria rinse into pockets. That´s nonsense, cause first of all bacteria only move due to extensions and second bacteria are harmless at their own. Bacteria only cause parodontitis and/or cavity in the mature plaque. You only remove [...]

Parodontitis-saliva test–useful?

Parodontitis-saliva test? Yes and no! The last article was about lasers, now we are talking about the next nonsense: the saliva test. It happens again and again that patients who suffer from parodontitis undergo a saliva test at the begin of the therapy. Gratulations! Now you know that you have bacteria in your mouth! If you [...]

Parodontitis-usage of lasers–useful?

Parodontitis-usage of lasers–useful? Unfortunately parodontitis is still treated with lasers although it is proven unsuccessful. The usage of lasers is futuristic- probably that is why patients are more willing to pay. Non-serious doctors take advantage of this circumstance, aside there are ignorant doctors as well. – Either way the usage of lasers is not useful [...]

Dental crown – dark edges

Posted by Dental News Team am 03, Nov - 2009

prostethics

You may have a very pretty dental crown (not in these pictures), but the dark edge is a dead give-away that this tooth is not your own.

Not only is this annoying, but nowadays it is not even necessary. So what causes these edges?
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First we need to find out whether this discoloration is caused by the tooth, or the crown!

Sometimes it is the root which is discolored and shows black through the gums.

A purely ceramic crown will not do the trick in this case!
Black, discolored roots result from poor root treatment. If bacteria remain in the root canal after treatment, and if blood flows into the root canal during treatment, then the iron contained in the blood’s pigment (haemoglobin) turns into black haemosiderine.

This does not necessarily result in a dark edge, but if you happen to have gums that are very thin and soft, then the dark root may show through. The picture on the left shows this. Crowns will not help to cover this up, only renewed treatment followed by internal bleaching.
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What is easier to fix is if only the edge of the crown is discolored. If the tooth was cut wrong, and a metal-ceramic crown applied, then the edge of the crown may end in metal. In this case the old crown needs to be removed, and the tooth stump prepared for a new – this time purely ceramic – crown.

More on the topic of dental crowns here!

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