The brush heads from Philips are recommended. Had already replicas in use, where I had a subjectively poorer cleaning results. After I thought about it some faith- I use only original replacement brush heads for sonic toothbrushes. The sonic toothbrush Philips makes 31,000 brush strokes per minute. Thus, if a replica of brush head is not 100% in order (eg non-rounded bristles), I was damaging my teeth in 2 minutes, more so than in a normal toothbrush in the whole month. That's me personally the savings not worth it.
