Case No.

Age (yr)/Sex (M/F)

BMI (kg/m²)

Previous head and neck surgery

Limitation for head extension

Maximum

mouth opening

CL grade by ML

CL grade by McG

1

50/M

23.8

Neck dissection

Severe

2 fingers

III

I

Right hemiglossectomy

Pectoralis major myocutaneous flap reconstruction

2

47/M

21.0/M

None

Normal

1.5 fingers

IV

II

3

77/M

23.5/M

Tumorectomy for left buccal mucosa

Normal

2 fingers

III

I