Human teeth stone age more healthy, than human teeth in the modern era

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Although the human who living in the stone age are not yet know with toothpaste and the dentist, teeth and mouth turned out much better than the human of age now. This is because changes in bacteria that inhabit the human mouth in every generation.

Researchers said that the human of today, a lot more facing Health problems the mouth than people who live in the stone age. Decline in oral health over the last 7,500 years is due to the change due to the evolution of human oral bacteria and industrialization.

As quoted from HealthDay, Thursday (21/02/2013), the results of the study are published February 18 in the journal Nature Genetics, who wrote that the changes in oral bacteria has been cause a variety of chronic oral health problems.

"The composition of oral bacteria have changed significantly with the familiar agricultural science 150 years ago," said Alan Cooper, leader of the study and a professor at the University of Adelaide's Australian Centre for Ancient DNA.

After human know sugar and refined flour in the food industry, the researchers noticed that as there is a diversity of bacteria that inhabit the human mouth. The existence of various bacteria, allowing the human experiencing some problems in the mouth, such as cavities.

The research team also looked at the DNA of tartar (dental plaque) 34 primordial man skeletons have been preserved. Primordial man skeleton it is found in northern Europe. Of these samples, researchers can analyze how oral bacteria have changed since the Stone Age, a period of hunting and gathering in the middle ages, on the period where humans began to recognize food.

"Dental plaque is the only object of research that is easily accessible for know the bacteria that inhabit the human mouth in the past. Genetic analysis of plaque can show the impact of eating patterns, health changes, and evolution of the genomes of pathogenic oral health in the stone age it," said Christina Adler, author of the study from the University of Sydney.

Cooper added that the changes caused by the bacteria are also the evolution of human behavior and the consumption of certain foods that have a negative impact on oral health. The study was expanded to include other periods, other regions of the world, and the species of other primordial man.