Assessing the Airway
-No one measure can assess the difficult airway, combinations of the assessment measures below should be used. 

Mouth opening

• Inter-incisor distance

• Mallampati score
  
• (tongue)

Jaw

• Protrusion of lower teeth in front of upper teeth
• Thyromental distance

Neck

• Flexion of vertebrae
• Extension of atlanto-axial joint
• Neck circumference

Dentition

• Dental work
• Damaged teeth