This could be a good idea, because we've found the right size toothbrush for dogs their size, and the amount in the center of the toothbrush is just the right size. But, human toothpaste contains high levels of fluoride that can be deadly to dogs. You can't control if your dog swallows the toothpaste and if you think about it, we can't even swallow toothpaste. Because there's a center of human toothpaste that is both fatal and unhealthy for your yorkie, I do not recommend those.
Kash