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Thursday, June 30, 2011

How to Floss? or What is Flossing?

What is a dental floss?

Dental floss is either a bundle of thin nylon filaments or a plastic (Teflon or polyethylene) ribbon used to remove food and dental plaque from teeth. The floss is gently inserted between the teeth and scraped along the teeth sides, especially close to the gums. Dental floss may be flavored or unflavored, and waxed or unwaxed. An alternative tool to achieve the same effect is the interdental brush.

History of Dental Floss.

Levi Spear Parmly, a dentist from New Orleans, is credited with inventing the first form of dental floss. He recommended that people should clean their teeth with silk floss in 1815.

Flossing box
Dental Flossing Box containing Floss


Dental floss was still unavailable to the consumer until the Codman and Shurtleft company started producing human-usable unwaxed silk floss in 1882. In 1898, the Johnson & Johnson Corporation received the first patent for dental floss. Other early brands included Red Cross, Salter Sill Co. and Brunswick.

Use of Dental Floss:

Dental floss is commonly supplied in plastic dispensers that contain 10 to 50 meters of floss. After pulling out the desired amount, the floss is pulled against a small protected blade in the dispenser to sever it.

How to brush your teeth? (Brushing Technique)

What Is the Right Way to Brush?

Proper brushing takes at least two minutes — that's right, 120 seconds! Most adults do not come close to brushing that long. To get a feel for the time involved, try using a stopwatch. To properly brush your teeth, use short, gentle strokes, paying extra attention to the gumline, hard-to-reach back teeth and areas around fillings, crowns or other restoration. Concentrate on thoroughly cleaning each section as follows:
  • Clean the outer surfaces of your upper teeth, then your lower teeth
  • Clean the inner surfaces of your upper teeth, then your lower teeth
  • Clean the chewing surfaces
  • For fresher breath, be sure to brush your tongue, too

Brudhing Technique-1
Tilt the brush at a 45° angle against the gumline and sweep or roll the brush away from the gumline.

Thursday, June 23, 2011

What is Dentine Hypersensitivity ?

Dentine hypersensitivity is sensation felt when the nerves inside the dentin of the teeth are exposed to the environment. The sensation can range from irritation all the way to intense, shooting pain. This sensitivity can be caused by several factors, including wear, decaying teeth or exposed tooth roots.

Dentine hypersensitivity
Click the image to enlarge..


Dentine contains many thousands of microscopic tubular structures that radiate outwards from the pulp; these dentinal tubules are typically 0.5-2 microns in diameter. Changes in the flow of the plasma-like biological fluid present in the dentinal tubules can trigger mechanoreceptors present on nerves located at the pulpal aspect thereby eliciting a pain response. This hydrodynamic flow can be increased by cold, air pressure, drying, sugar, sour (dehydrating chemicals), or forces acting onto the tooth. Hot or cold food or drinks, and physical pressure are typical triggers in those individuals with teeth sensitivity.

Treatment can consist of amorphous calcium and phosphate, NovaMin, potassium nitrate, strontium chloride, gluma, fluoride therapy, or calcium sodium phosphosilicate.

Potassium nitrate is commonly used in toothpastes such as Sensodyne or Crest Sensitive as a remedy and is approved as a monographed drug by the FDA. Nonetheless, there remains some dispute about its effectiveness. Strontium chloride and strontium acetate are used in Sensodyne Original and Sensodyne Mint toothpastes. The mode of action is linked to their ability to form mineralised deposits within the tubule lumen and on the surface of the exposed dentine that help prevent transmission of the applied stimulus.