Pain score groups Number of
patients
Mean (SD),
min
t-test P-valuea
Post IANB 80 41 (20.5) 17.85 < 0.001
Post intraseptal injection 40 16 (19.8)
Post buccal infiltration 40 9 (13.4)
Post intraseptal injection 40 16 (19.8) 5.08 < 0.001
Post buccal infiltration 40 9 (13.4)

aSignificant difference in means of pain scores amongst local anaesthetic injection techniques (P < 0.001, Student's t-test).
SD = standard deviation.