Our son Ben who has DMD has had alot of dental issues, even though he is only 4years old. He has already had to have dental surgery which took about 4hours to complete back in June. Just this past Monday, he had to go back in and have another tooth filled because it had a cavity. I also brush his teeth twice a day, floss and use flouride mouth rinse at night. Our two daughters have not had dental issues like this either. Not sure if it is DMD related.
Just thought that I would let you know that we are also dealing with dental issues with our DMD son.