Hopefully they will clean your dog's teeth when they remove the baby teeth. Retained baby teeth can be a big problem in the mouth.
There are enzyme gels and sprays that you can use on your dog that work better than brushing. There are also things you can add to the drinking water to keep the mouth clean between cleanings. Using these products can extend the time between cleanings.
Amazon.com: Petzlife Oral Gel 4Oz and Oral Spray...
Dogs that eat raw food do not get the plaque on their teeth that kibble eaters do. The enzymes from the raw keep the teeth clean. Dogs bodies are made to digest raw foods unlike humans. Now pet supply companies are selling enzymatic products that clean the teeth and keep them from retaining plaque.
Plaque means there are harmful bacteria in the mouth and that can also cause gum disease. Once the gums are diseased the teeth fall out or need to be removed.