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11Feb

Pin Retained Filling

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What is a Pin Retained Filling?

This dental procedure refers to the placement of metal reinforcing pins used to further secure and strengthen any type of dental restoration. These self-setting screw pins are screwed into the tooth to act as a framework for any filling layered into the cavity of a tooth to restore its new form. Pins are tiny threaded screws that are placed about ½ millimeters into dentin. A pilot hole slightly smaller than the pin is drilled into the tooth, then the pin is screwed into place. An amalgam (metal) or composite (tooth-colored) filling is then placed over the top. The pin is only used for retaining the filling on the tooth. It does not reinforce like a rebar does with concrete.

What are the indications for a Pin retained filling?

Many times, teeth can be so broken down due to extreme decay or fracture that there is not enough tooth structure available to hold a filling in place. In most of these cases, a crown (cap) would be indicated. However, certain situations may call for a change in plans. Things like inability to afford a crown, an unstable gum situation, waiting to see if a recent root canal will work, or any situation where the long term progression (outlook) is questionable are all possible reasons to go with just a filling. When there is not enough tooth structure to hold a filling, then pin retention is indicated.

How long does a Pin retained filling last?

Usually, a filling will last anywhere from 7-20 years, although this depends on the location of the filling, the size, and your dental hygiene. Fillings put up with a lot of stress!

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