Dental How much minimum amount of vertical space should be there between the floor of the mouth and gingival margins of teeth, to use a lingual bar? A 3mm B 5mm C 6mm D 8mm 💡 Explanation How much minimum amount of vertical space should be there between the floor of the mouth and gingival margins of teeth, to use a lingual bar? ✓ Correct Answer: D. 8mm