Oral hygiene is the practice of keeping the mouth and teeth clean to prevent dental problems, most commonly, dental cavities, gingivitis, and bad breath. There are also oral pathologic conditions in which good oral hygiene is required for healing and regeneration of the oral tissues. These conditions included gingivitis, periodontitis, and dental trauma, such as subluxation, oral cysts, and following wisdom tooth extraction.
Body piercing, a form of body modification, is the practice of puncturing or cutting a part of the human body, creating an opening in which jewellery may be worn. The word piercing can refer to the act or practice of body piercing, or to an opening in the body created by this act or practice. Although the history of body piercing is obscured by popular misinformation and by a lack of scholarly reference, ample evidence exists to document that it has been practiced in various forms by both sexes since ancient times throughout the world.
Ear piercing and nose piercing have been particularly widespread and are well represented in historical records and among grave goods. The oldest mummified remains ever discovered were sporting earrings, attesting to the existence of the practice more than 5,000 years ago. Nose piercing is documented as far back as 1500 BC. Piercings of these types have been documented globally, while lip and tongue piercings were historically found in African and American tribal cultures. Nipple and genital piercing have also been practiced by various cultures, with nipple piercing dating back at least to Ancient Rome while genital piercing is described in Ancient India c. 320 to 550 CE. The history of navel piercing is less clear. The practice of body piercing has waxed and waned in Western culture, but it has experienced an increase of popularity since World War II, with sites other than the ears gaining subcultural popularity in the 1970s and spreading to mainstream in the 1990s.
Body modification (or body alteration, called body mutilation by detractors) is the deliberate altering of the human anatomy or phenotype. It is often done for aesthetics, sexual enhancement, rites of passage, religious beliefs, to display group membership or affiliation, to create body art, for shock value, and as self-expression, among other reasons. In its most broad definition it includes plastic surgery, socially acceptable decoration (e.g., common ear piercing in many societies), and religious rites of passage (e.g., circumcision in a number of cultures), as well as the modern primitive movement.
In contrast to the explicit ornaments, the following procedures are primarily not meant to be exposed per se, but rather function to augment another part of the body, like the skin in a subdermal implant.
A tongue piercing is a body piercing usually done directly through the center of the tongue, and is the fifth most popular piercing site in the western world after the ear. Standard tongue piercings, or one hole in the center of your tongue, is the most common and safest way to have your tongue pierced.
There is a history of ritual tongue piercing in both Aztec and Maya cultures, with illustrations of priests piercing their tongue and then either drawing blood from it or passing through rough cords designed to inflict pain. There is no evidence of permanent or long term tongue piercing in Aztec culture, however; despite the practice of many other permanent body modifications, it was done to honor the gods.