3a)Central Incisors
3b)21
3c)Incisors, Canines, Pre-molars, Molars
3d)Enamel, Dentin, Pulp/Nerve, Bone
6a)Brushing
6b)2-3 minutes
9a)Yes
9b)Sugar
12a)Orthodontic Treatment
12b)Brackets, Bonding/Band, Arch Wire