 At the end of each procedure, post-operative recommendations written protocol were given to parentsguardians. On the day following treatment, telephone contact was made to parentsguardians to gather information about possible adverse events in 24 hours following procedure. In both groups, during the sessions, childrens behavior was evaluated through the Houpt scale, with an observer previously calibrated and masked. The scoring system suggested by Houpt et al. for this purpose included four scales: sleep scale awake - score 1; asleep - score 2, crying scale hysterical crying that demands attention - score 1; continuous, persistant crying that makes treatment difficult - score 2; intermittent, mild crying that does not interfere with the treatment - score 3; no crying - score 4, movement scale violent movement, interrupting treatment - score 1; continuous movement make treatment difficult - score 2; controllable movement that does not interferes with the treatment - score 3; no movement - score 4 and overall behavior scale aborted, no treatment rendered - score 1; poor, treatment interrupted, only partial treatment completed - score 2; fair, treatment interrupted, but eventually all completed - score 3; good, difficult but all treatment performed - score 4; very good, some limited crying or movement - score 5; excellent, no crying or movement - score 6. The evaluations were performed during all the treatment sessions. The scores were established in accordance with the Houpt Scale every minute of the session, and in three specific moments of the dental treatment at the time of anesthesia, at the time of use of high rotation and at the end of treatment, in addition to the overall evaluation. For calibration, the examiner watched five minutes videos of three patients during the clinical examination. The same videos were watched by a researcher as a gold standard, in order to assess the correlation between the examiners. There was concurrence intra and inter examiner, obtaining values of kappa 0.9 and 0.8, respectively. 