Pt. wasn’t anesthetize well in his 1st visit, next day returns with limited mouth opening (trismus). he must be anesthetized, what’s the technique to be used.. Bircher’s technique

Pt. wasn’t anesthetize well in his 1st visit, next day returns with limited mouth opening (trismus). he must be anesthetized, what’s the technique to be used?
A. William’s technique
B. Bircher’s technique***