All my galgos have luckily arrived with fairly good teeth but my little podenca Bebe was about 5 when she was rescued injured from a Seville road, very thin and petrified. Her teeth were already in a poor state. In the 12 years she has been with me, she has had her 4 front teeth removed because they were bad, and also a couple of back teeth. Despite being given chews regularly.
The Blue Cross charity has the following advice on dental care for canines. Click on this link.