[Bryanna]

Silky,

The term "reduce" the cusp includes smoothing out the sharp area or reshaping it the best that it can be.

If you are saying that there is already big "dip" in the cusp or a cusp is missing, then a new crown may have to be made.

Bryanna



.[QUOTE=Silky;1060350]

Originally Posted by Bryanna

Hi Silky,

Sometimes composite material can be added to the porcelain on a crown but it usually doesn't stay on too long especially if it is placed on the cusp. Has your dentist tried reducing the cusp (with a drill) on the porcelain?

Hi Bryanna,

The dentist didn't try reducing the cusp. He said he could try to smooth out the cusp, but wouldn't that make the space bigger, and then possibly irritate the tongue more. Would you try smoothing first,or try to reshape the crown in some way?

Thanks. Carol

[Silky]

Hi Bryanna,

Was wondering how long labs usually keep the mold, or impressions of the teeth they use to make a crown? I need to have a crown redone. The crown is 3 years old, so was wondering if they could make an exact copy from what they might still have in their records.

Thanks. Silky

[Bryanna]

Hi Silky,

Dental labs send the models back to the dentist with the new crown and the dentist hangs onto the model for a few weeks at best. Labs do not duplicate the models so they will have nothing to fabricate a new crown from.

A three year old crown is not considered old. Is this the crown you have been talking about or is it on a different tooth?

Bryanna

Originally Posted by Silky

Hi Bryanna,

Was wondering how long labs usually keep the mold, or impressions of the teeth they use to make a crown? I need to have a crown redone. The crown is 3 years old, so was wondering if they could make an exact copy from what they might still have in their records.

Thanks. Silky

[Silky]

The crown I've been talking about is a lower crown #18. The crown that needs to be redone is upper tooth #14.

[Bryanna]

Silky,

Okay. Like I said, 3 years is not old for a crown and insurances will only pay for a replacement at the 5,7 or 10 year mark. Depends on the policy.

Bryanna

Originally Posted by Silky

The crown I've been talking about is a lower crown #18. The crown that needs to be redone is upper tooth #14.

[Silky]

Bryanna,

If I had the impression of the teeth that is sent to a lab to make a crown, would they be able to duplicate the crown that was there previously , and make a new crown almost exact to what was there before?

Thanks. Silky

[Bryanna]

Hi Silky,

That could result in an ill fitting crown and the lab would not guarantee the fit. Teeth shift especially when a tooth has been extracted near, above or below the one being crowned.

Just curious.... do you have the original impression?

[Silky]

Bryanna,

When I had # 15 extracted, # 14's crown was fractured during extraction. They made a new crown for #14, but it is too long and goes into the space of both # 18 and #17, which causes problems with the tongue. They have sent it back to the lab to work on it, because I had the crown put in with temp cement. I'm worried that it still might not fit good. So the impression was taken of # 14 before preparing the tooth for new crown. The crown that was there fit perfectly....so was wondering if a lab can make a crown just like the one that was there in the first place from this recent impression. What they came back with was entirely different, and a tongue irritation problem.

Thanks. Silky

[Silky]

Bryanna,

Don't know if you saw this. Also, is it ever okay to let a crown run past the tooth that's being crowned and into the adjacent tooth just because the upper tooth is missing?

When I had # 15 extracted, # 14's crown was fractured during extraction. They made a new crown for #14, but it is too long and goes into the space of both # 18 and #17, which causes problems with the tongue. They have sent it back to the lab to work on it, because I had the crown put in with temp cement. I'm worried that it still might not fit good. So the impression was taken of # 14 before preparing the tooth for new crown. The crown that was there fit perfectly....so was wondering if a lab can make a crown just like the one that was there in the first place from this recent impression. What they came back with was entirely different, and a tongue irritation problem.

Thanks. Silky[/QUOTE]