An oldie but a goodie—Here’s a post we still refer to all the time from 2009!

Erosion is defined as a chemical dissolution of tooth structure by acids without the involvement of microogranisms. There are two causes of dental erosion. The first is intrinsic and is caused by gastrointenstinal problems like acid reflux and anorexia or bulimia. The other cause is extrinsic and is caused by environmental factors, lifestyle and diet. Several studies have compared the association between dental erosion and soft drinks (carbonated beverages, fruit drinks, energy drinks, sports drinks, etc.). There has been increase interest in this topic because of the rising amount of children and adolescents consuming soft drinks. Also immature teeth are porous and more easily dissolved by acids.
The two most important aspects to look at with soft drinks is the sugar and acid content. There are two methods to measure the acid content in a beverage. They are the initial acidity (pH) and the titratable acidity (TA). Beverages with a lower pH typically have greater erosive effects on the teeth, but the TA level is the more accurate way to determine the erosion potential in a certain beverage. pH measures acid strength, and TA measures the amount of acid present. The greater the TA, the longer time it will take for the saliva to restore the mouth to a neutral pH value. A neutral pH is where acid can’t attack and damage tooth structure. Carbonated cola beverages, sports and high-energy drinks have been reported to have a low pH and a high TA.
The chart above shows the pH and TA of 4 different beverages. A recent study was done comparing the enamel dissolution of these 4 beverages. The results stated that although the pH of carbonated beverages was lower than Gatorade and Red Bull, the dissolution of enamel by the carbonated beverages wasn’t as severe as the other beverages. Red Bull and Gatorade showed the most enamel dissolution. This could be because of the high concentration of refined carbohydrates (sucrose and glucose) which promotes greater degrees of acid production. The citric acids and citrates can also bind to calcium in the tooth, thus keeping the pH low for longer periods of time. All the beverages showed different amounts of enamel dissolution. The greatest to the least enamel dissolution was Red Bull, Gatorade, Coca-Cola, and Diet Coke. In general, almost all carbonated beverages, sport drinks, energy drinks, and fruit juices aid in enamel dissolution. Here a few tips to help mangage/prevent dental erosion: don’t brush immediately after eating or drink acidic things but wait at least a half and hour, rinse with water after contact with acids, drink through a straw, use fluoridated toothpaste/mouthrinses at home, and get a professionally applied fluoride varnish to teeth.
Here are a list of soft drinks and pH and sugar content of them.
Drink, pH, Sugar Content (grams/12 oz)
Battery Acid- 1, 0
Lemon Juice- 2, 0
Coke- 2, 39
Pepsi -2.3, 41
Sunny Delight- 2.4, 30
Snapple- 2.4, 27
Lemonade- 2.5, 25.5
Squirt -2.6, 40
Hawaiian Punch- 2.6, 23
Cranberry Juice- 2.6, 46
Capri Sun -2.6, 26
Dr. Pepper- 2.7 ,40
Mountain Dew -2.7 ,46
Orange Crush – 2.7 ,50
Gatorade- 2.7 ,14
Diet Coke- 2.8, 0
Sprite -3 ,26
Kool-Aid Jammers- 3, 24
Propel -3.2, 2
Apple Juice -3.4 ,23
Iced Tea, unsweetened -3.5, 0
Juicy Juice -3.5 ,22
Orange Juice -3.9 ,46
Barq’s Root Beer -4 ,45
A&W Root Beer- 4.3, 46
Milk- 2% 6.8, 16.5
Water -7, 0