Will using Sensodyne toothpaste be helpful with any possible sensitivity after treatment?

Yes, using sensodyne, or a toothpaste or mouthwash with fluoride in it will help with sensitivity after your whitening treatment.  You can also use the toothpaste prior to the treatment to help prevent sensitivity.

Sensodyne toothpastes may take up to 2 weeks for you to feel relief. I would starting using sensodyne 2 weeks before you start whitening and continue brushing your teeth with sensitive toothpaste for the weeks following the procedure. During the first 24 hours after whitening treatment, some patients can experience some tooth sensitivity or pain. This is normal and is usually mild, but it can be worse in susceptible individuals. Normally, tooth sensitivity or pain following a treatment subsides within 24 hours, but in rare cases can persist for longer periods of time. Sensodyne toothpaste can help minimize this discomfort.

Sensodyne's main ingredient that helps with sensitivity from Zoom whitening or just sensitivity in general is potassium nitrate. While Sensodyne was the first toothpaste to use potassium nitrate, now there are many other toothpastes on the market that contain potassium nitrate. Using Sensodyne 1 week before a whitening treatment will decrease your post op sensitivity.