If the charge was "dismissed" as you stated, that would mean there was no conviction. If there was no conviction, then you have no criminal record. Unless you were charged as an adult, the arrest should not have been found by the nursing board. Juvenile records are supposed to be sealed. On the other hand, some states define "adult" for criminal purposes as over 15 or 16, etc. If your case was not "dismissed" and you were convicted, you might want to consult an attorney about possibly getting the conviction expunged since you have been a model citizen. The ability to do this will depend on the law in your state and the offense. Obviously, it will be easier to get somewhere with this if the offense was a misdemeanor rather than a felony.