Periodontitis versus parodontosis

There are still dental professionals who use the old and wrong name for a periodontal disease – parodontosis. The correct name is periodontitis. – In former times bacteria couldn´t be proven because of wrong techniques-this was called parodontosis. In the last 25 years it is known that inflammation of the periodontum is caused by bacteria, […]

Gums as a reflection of our overall health!?

Gums as a reflection of our overall health? YES AND NO! Over and over again we read scientific and non scientific journals about vitamin deficiency and the consequences from it. As a result many people choose to take homeopathic medicine –a mistake most of the time! – 99% of gum diseases are attributed to plaque […]

Most common reasons for periodontitis

  – – – – – – – Most common reasons for periodontitis The most common reasons of pariodontitis are: Plaque accumulation due to poor oral hygiene, overhang restorations, ill fitting crowns Malocclusion Stress      Smoking Systemic disease such as diabetes, adverse pregnancy outcomes Fortunately all these factors are easily controlled by; Optimizing tooth brushing, by […]

Oral Rinses – are they useful in the menagement if Periodontitis?

 Is an oral rinse beneficial for patients with periodontitis? YES! An oral rinse is a useful purchase, unfortunately some doctors think it is not useful-with the argument that bacteria leaks into the periodontal pockets. That is incorrect for two main reasons; The bacteria moves only due to extensions Bacteria are harmless on their own. They are destructive only in mature plaque, causing a cavity or a […]

Periodontitis and saliva test-is it useful?

Periodontitis-saliva test? Yes and no! Our last discussion was about lasers, today we want to inform you about the saliva test. It is a common practice for some dental professionals to require that the patients with periodontal disease to undergo expensive saliva test prior to their therapy.    Congratulations! Now the patient knows that there […]

Dental crown – dark edges

Posted by Dental News Team am 03, Nov - 2009

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?

dunkler_kronenrandFirst 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.

schlechte_wurzelbehandlungThis 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.

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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