my favorite technology invetion

When i was a little girl there were no smartphones, smart TV, notebooks, and i appreciated the few electronic devices, like the radio, television, VHS, MP3, CD's, cassettes. The an electronic device is different from technological advices because in the technological field there have been advances very quickly since the industrial revolution with the creation of the steam machine and even more with the first trip to the moon. So, compare these two things is a big mistake. That’s why my favorite technology invention isn´t a electronic device, it is a good and useful creation of the human and a real technological advances THE TOOTHBRUSH, created many years ago in 1498 in Japan.
Is my favorite technology invention because most of the people use everyday of their lives and who can not use this technology invention would suffer from caries or with the passage of the time the fall of the teeth, IMAGINE not having teeth!!! We couldn't eat and we love eat!!! That’s why the oral hygiene is so important. The tooth brush is indispensable (without forgetting the tooth paste)  try not to use the toothbrush for a week and you will understand what I say.