How can dental decay be treated in the thin, spade-like end of an upper incisor?

My dentist has used a laser device, which, along with X-rays, shows definite thinning. How do you get a resin filling into such a thin space? (Please don't say "Very carefully". Thanks.

Answers:
I am assuming that "laser device" was a Diagnodent. GREAT TOOL! We use one in my office. As far as how a filling can be done in this area, well, we have very small burs(drill bits) that can just remove enough enamel to allow the filling to be bonded in place. This is very common to do, and I have seen no problems, other than on a patient who grinds their teeth. In that case the filling could break off. You would need to speak with your dentist to make sure that you don't do this.

There is a very small bur, called a fissurotomy, that we use. It is made by SS White. Might not be a bad idea to see if he uses this item. It is very tiny on the end and sharp, so it can be used in small areas and not remove much tooth structure.

Well, "very carefully" is the correct answer. You (ie: the dentist) would use a very narrow bur (drill) and just go for it. If your tooth is very thin, the rear plate of enamel might be "sacrificed" to get access to all of the decay, but you can't just leave it there.

When we do fillings in ANY location, it pretty much always involves removing non-decayed tooth structure just to get to the bad parts that must be removed. This is just a little more noticeable location.

Once the resin filling is in place, you'll never know anything was done.
with any of the device ur dentist is using all he needs to do is remove the decay and make grooves for added retention.
always remember resin filling material is bonded on to the tooth. so it will stay no matter what, the grooves r only for added retention.. its the decision of ur dentist.
X-rays and a laser device (probably Diagnodent) for decay in the tip of an incisor? Very strange dentistry going on here.
If you truly have decay in the edge of this tooth, then visual assessment would be the way it would be diagnosed. X-rays would be inappropriate, and the Diagnodent is designed for fissures in back teeth.
Get a second opinion before he picks up the drill.
Now, if we're talking about true thinning (without decay), then this is usually the result of acidic drinks e.g. sodas, cordials, fruit juices, and is more likely to be evident throughout your mouth rather than just one tooth. Too difficult to discuss further here, but again, seek a second opinion before starting treatment.
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