A comparison of Mallampati scoring, upper lip bite test and sternomental distance in predicting difficult intubation

Mallampati et al, proposed a grading system to anticipate difficult intubation, which considers visualization of faucial pillars, soft palate and base of uvula. 4 The upper lip bite test (ULBT) was proposed as a simple bed side technique by Khan et al, which involves the assessment of jaw subluxation and presence of buck teeth. 9 Savva et al, proposed sternomental distance (distance from the suprasternal notch to the mentum) as the predictor of difficult laryngoscopy and intubation. 10 Other clinical predictors of difficult intubation include thyromental distance, receding mandible, buck teeth and obesity. 11