Guide: Do orthodontic patients need to grind their teeth? Sanbo dental experts said that for patients with mild crowding, we can get a limited gap by expanding the dental arch, without tooth extraction and molar correction; Most patients with moderate or severe congestion should have their teeth extracted to get a gap. Dr. Li from Sanbo Stomatology Department said that it depends on the doctor's technical level to extract teeth and grind teeth during orthodontics. Under normal circumstances,