- 21 Operation On Nose
- 22 Operations On Nasal Sinuses
- 23 Removal And Restoration Of Teeth
- 24 Other Operations On Teeth, Gums, And Alveoli
- 25 Operations On Tongue
- 26 Operations On Salivary Glands And Ducts
- 27 Other Operations On Mouth And Face
- 28 Operations On Tonsils And Adenoids
- 29 Operation On Pharynx