In life, horrible accidents can happen. Some people get get injuries to their faces which can seriously disfigure them.
In some cases, a face transplant may be performed to bring back their normal face as much as possible.
However, the face transplant procedure is still in an experimental stage.
The world's first full-face replant surgery was on nine year-old Sandeep Kaur, whose face was ripped off when her hair was caught in a thresher.
Below are several other previous face transplant cases :
A combination photo shows face transplant recipient Charla Nash, of Stamford, Connecticut, before (L) and after her injury, in these undated photographs released on June 10, 2011. Nash, who was mauled by a chimpanzee in 2009, has received a full face transplant, the third surgery of its kind performed in the United States, Boston's Brigham and Women's Hospital said on June 10, 2011.
Face transplant patient Dallas Wiens is seen before (L) his transplant and after (R) in this combination handout image released to Reuters on May 9, 2011. More than 30 physicians, nurses, anesthesiologists and residents worked for more than 15 hours to replace the nose, lips, facial skin, muscles of facial animation and nerves of Wiens, disfigured in an electrical accident in 2008.
Face transplant recipient Rafael embraces a nurse during a news conference at Virgen del Rocio hospital in Seville May 4, 2010. Rafael, who received the lower face transplant at the hospital in January, suffered from neurofibromatosis, a genetically-inherited disorder which caused facial tumours. Rafael's operation is the second time the procedure has been performed in Spain.
Face transplant patient Connie Culp is seen in this combination photo made of handouts released to Reuters by Cleveland Clinic on May 6, 2009. Culp, who survived a gun shot to her face, is seen before the attack (L), before the 22-hour procedure performed in December 2008 (C) and in a recent photo (R) after 80 percent of her face was transplanted. This was the first near-total face transplant in the United States.
A combination photograph shows a man before and after his operation when he received a face transplant, in Xian, Shaanzi province. The man, surnamed Li, suffered severe injuries from a bear attack in 2004. Li underwent the operation at a Xi'an hospital with help from a voluntary organization. The operation, which was successful, started on April 13 and lasted 13 hours, the hospital said. Li will continue his restoration operation after returning from home. It is the first successful face transplant operation in China, China Daily reported. The picture on the left is taken on April 13, 2006 and the picture on the right is taken on July 28, 2006.