Russian dolls redirects here. For the movie, see Russian Dolls (film). A matryoshka doll (Russian: Ð¼Ð°ÑÑÑÑÐºÐ°; IPA: [mÉËtrÊ²ÉµÊkÉ], matrÃ«Å¡ka), also known as a Russian nesting doll, or Russian doll, is a set of wooden dolls of decreasing size placed one inside another.
Nail injuries can be noticeable until the damaged nail grows out. Fingernails usually regrow completely in about two months. Toenails take about four months. If injury includes the base of the nail, some cosmetic changes may be permanent.
In humans, nails grow at an average rate of 3 mm (0.12 in) a month. Fingernails require three to six months to regrow completely, and toenails require twelve to eighteen months. Actual growth rate is dependent upon age, sex, season, exercise level, diet, and hereditary factors.