According to a study published this week by the open access journal Physical Biology, if this is done wrong, the delicate balance of the nail breaks and residual stresses occur. This tension favors a change in the shape or curvature of the structure, over time, the harmful, even seriously.
The authors of the paper are two researchers from the University of Nottingham (UK), who have devised various equations to determine the physical laws that govern the growth of nails.
"It´s amazing what some people are willing to do to make your nails look good comments the senior author Cyril Rauch-, but, in view of the results, our suggestion to fans of the beauty of nails is that choose to leave straight or parabolic edges when cut, otherwise, you can amplify the imbalance of tensions and lead to serious illnesses. "
In fact, the formulas developed by scientists shed light on the physical causes are behind some of the common nail problems, such as those presented in the form of a spoon or clip, and, above all, are introduced or embodied in the skin. The treatment of ingrown toenails are not very satisfactory because the exact cause is not known.
To set your equations, the researchers took into account the strong bond between nail and nail bed beneath it. This union is established through tiny microscopic structures that allow the nail to grow and sliding forward as if it were a ´ratchet´ with unions and continuous separations.
Taking into account the mechanical stresses and energies associated with nails, researchers with a general equation of form. This formula shows that when the pressure balance between growth and for example the adhesive tension breaks if a nail grows slowly or too quickly, or changes the number of points of adhesion-is where residual stress may arise and change shape over time.
More tension in larger nails
The equations showed that this residual tension or stress can occur at any fingernail or foot. However, its value is greater in the nails that are larger in size and have a flat edge, which explains why ingrown toenails occur predominantly in the big toe.
Although the residual stress can also be caused by age or a change in metabolic activity, often ingrown toenails in children and pregnant women are diagnosed, for example formulas confirmed that badly cut nails can amplify this harmful stress.
Rauch also believes that this research can be applied to animals, especially livestock, to solve problems related to the hoofs of his legs.
"Cows, sheep, horses and ponies suffer greatly from the status of their hooves and this may impact on the human population," said the expert, who explains: "In a time when securing food worldwide is important to understand physics hooves of animals has never been so essential to sustain agriculture, livestock and food production. "
"I believe that physics can be used to promote a new type of veterinary medicine based on evidence and help communities of veterinarians and farriers to create methods to alleviate pain in animals and potentially eliminate some serious