Any toothbrush is fine to use on your veneers. However, you must be cautious when brushing at the gumline. If the bristles of your toothbrush are too hard or abrasive or if you tend to use a lot of force when brushing, you run the risk of causing gum recession which could expose the margins of your veneers and the discolored root portion of your tooth. Always try to use the softest toothbrush available to minimize the chances of causing tooth brush abrasion. A softer toothbrush will also allow you to clean a larger surface area increasing efficiency and keeping yours gums nice and tight around your veneers.
Sure its fine to maintain porcelain veneers with an electric oral b toothbrush. You can maintain them just like normal teeth. Enjoy. Dr. David Frey