Prisoner is a legal term for a person who is imprisoned. In section 1 of the Prison Security Act 1992, the word prisoner means any person for the time being in a prison as a result of any requirement imposed by a court or otherwise that he be detained in legal custody.
To qualify for insurance coverage under the medically necessary definition, one would have to practically be skeletally deformed...in essence, one would need a whole lot more than just braces for correction. Please read the link below to read what conditions qualify for medically necessary.
Braces are external devices that support the muscular and bony structures of the spine. In the past, many spine patients were required to wear heavy plaster casts. Fortunately, patients that must wear braces today benefit from lighter weight plastic braces that have been designed with the patient's comfort in mind. Braces are categorized as rigid or soft. Rigid braces are used to restrict movement, while soft, elastic type braces provide muscular support while allowing movement.