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).
Federal Bureau of Prisons. Federal Inmates. Our inmate population consists of people awaiting trial for violating federal laws or those who have already been convicted of committing a federal crime. Due to a law passed in 1997, we also confine offenders who have been convicted of a felony in the District of Columbia. Under certain agreements and special circumstances, we may also house state inmates.