Quality Dentistry for Discerning Adults

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Reproduced from: The BBC News
 (U.K. Electronic Edition of Thursday, 6 November, 2003, 00:11 GMT. British spellings retained.)

Our human ancestors may have taken a close interest in dental hygiene.

Palaeontologist Dr Leslea Hlusko, of the University of Illinois, claims to have evidence ancient man used rudimentary tooth picks. She has shown that curved grooves found on fossil teeth dating back 1.8 million years could be the result of erosion caused by repeated rubbing with grass stalks. 

Sceptics argue today's toothpicks leave no such marks, but Dr Hlusko said grass is more abrasive. Unlike wood, it contains large numbers of hard, abrasive silica particles. Dr Hlusko said grass stalks were the right size to leave the marks - between 1.5 to 2.6 millimetres wide. They were also widely available, and required little modification to become an effective toothpick. It is thought ancient hominids may have started picking at their teeth to try to alleviate the pain of gum disease.

New Scientist magazine reports that Dr Hlusko spent eight hours grinding a piece of grass along a tooth taken from a baboon. She then replicated the experiment for three hours on a modern human tooth. In both, the grass left marks almost identical to those seen in scanning electron microscopic images of early hominid teeth. Dr Hlusko, whose work is published in the journal Current Anthropology, said: "Toothpicking with grass stalks probably represents the most persistent habit documented in human evolution." 

Tooth picks were known to be popular in ancient China, Japan, India, Iran and other early Eastern civilisations. It is thought they often took the form of sharpened, fibrous sticks taken from the lentisk tree. Others were made from gold or bronze.

Tooth picks today

Regular, careful daily use of dental floss or special tiny brushes that fit between the teeth are currently the preferred methods for cleaning between the teeth.

Some people like to use tooth picks made of wood, metal, or plastic to help dislodge food particles and debris stuck between the teeth.  Tooth picks can be an aid in oral hygiene, but are not as effective as dental floss for removing the bacteria that cause cavities and gum diseases.  Special soft wood tooth picks (marketed under the brand name "Stimudents) can be more effective in removing bacterial plaque between the teeth than the more commonly found  harder wood tooth picks.

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David J. Fox, D.M.D., P.C.

Quality Dentistry for Discerning Adults ®

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