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When is crown lengthening required to fix a dental crown?

I went to a dentist 3 years ago for root canal treatment and a dental crown. One year later, the crown broke while I was eating. Two dentists have given me different options. One asked me to go for surgery to cut my gums so that the crown can fit, the other told me otherwise. When is crown lengthening required to fix a dental crown? What other options do I have that do not require surgery?

Crown lengthening is usually required to increase the amount of tooth structure available for a crown to grip on to firmly. This is usually done when the tooth has a short clinical crown (usually 2nd molars) to begin with, has been extensively damaged by decay or fractured due to trauma or when the decay extends under the gum close to the bone.

Crown lengthening refers to a specific type of gum surgery where bone is removed and the overlying gum is repositioned and secured with stitches to expose more of the underlying tooth structure. Other types of gum surgery include a gingivectomy where only the gum is removed. This does not require stitches afterward.

The risks of skipping crown lengthening is that the new crown may not be very secure and dislodge more easily. When this happens repeatedly, it can be very frustrating for both you and your dentist.

Other alternatives to crown lengthening:

1) Orthodontic extrusion

Braces are used to slowly pull the tooth out of the gum. This may require some brackets on the neighbouring teeth.

Broken tooth with previous crown lost

 

2) Partial extraction

For a single-rooted tooth (front teeth and some premolars), the tooth can be surgically repositioned to protrude out of the gum more instead of completely extracting it. This is quicker but more risky since the tooth may fracture during the surgical repositioning,

3) Subgingival (under the gum) crown margins

If there is a deficiency in available tooth structure only in a limited section, then placing the crown margins deeper under the gum can help to engage sufficient tooth structure. This requires skill to do correctly.

0 117 views 11 Dec 2018
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