Some people who use teeth whiteners may experience tooth sensitivity. That happens when the peroxide in the whitener gets through the enamel to the soft layer of dentin and irritates the nerve of your tooth. In most cases the sensitivity is temporary. You can delay treatment, then try again.
Federal prison. A federal prison is operated under the jurisdiction of a federal government as opposed to a state or provincial body. Federal prisons are used for convicts who violated federal law (U.S., Mexico), inmates considered dangerous (Brazil), or those sentenced to longer terms of imprisonment (Canada).
United States Federal Sentencing Guidelines. The Federal Sentencing Guidelines are rules that set out a uniform sentencing policy for individuals and organizations convicted of felonies and serious (Class A) misdemeanors in the United States federal courts system. The Guidelines do not apply to less serious misdemeanors.