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It's always interesting to note how what we believe is often the exact opposite of what is in fact true. Traditional logic tells us sharp knives are dangerous. More dangerous then blunt knives, and more likely to cause injury. 

But nothing could be further from the truth!


That makes no sense at all. How can a sharper knife be safer than a blunt knife?
Well, let's consider two scenarios where a knife could be dangerous - accidents and regular usage. 
In an accident scenario, a blunt knife is not so blunt to be safe - it's still sharp enough to cause the same serious injuries. In an accident scenario, in fact, blunt and sharp knives are just about as dangerous as each other, a pair of scissors or a screwdriver. 

In Regular Use

Using a dull knife will cause you to use greater force, which increases your chance of several kinds of injury: cuts, amputations, stabbing wounds into your leg, arm, or body, and increasing joint and nerve pain from repetitive motions that can be a warning sign of permanent crippling injury. Some people ultimately lose the ability to use their hands, arms, or back!
(Occupational Safety and Health Administration)


There is a strong possibility that you could experience increased joint and nerve pain that indicates the beginning of a permanent, crippling injury. Continuing to ignore pain or treating it only with ice, pills, and shots – rather than fixing the root problem – can lead to the inability to use your hands, arms, or back. Using dull knives also makes your work much more difficult, slower, and inefficient.
(Occupational Safety and Health Administration)

In some industries, for example the Meat and Poultry industry, blunt knives are considered so dangerous, there are actually laws requiring employers to provide sharp knives, sharpening facilities and training on how to sharpen.

Be Safe! Stay sharp. 
You can read more here.