How many hours a day do you wear a bone growth stimulator?

Excuse me, could you please elaborate on the paragraph you've mentioned? It seems to be about a bone growth stimulator, which is a medical device. Are you asking about the recommended usage duration for a bone growth stimulator? If so, typically, the duration of wearing a bone growth stimulator can vary depending on the individual's condition and the instructions provided by their healthcare provider. It's essential to follow the prescribed guidelines to ensure optimal results. So, the specific number of hours per day to wear the device would depend on the individual case and should be discussed with a medical professional.