Table 1. Description of working position and fingers for “ergonomic rest position” and “usual rest position”.

	Ergonomic rest position			Usual rest position
Tooth	Working position	Working hand (R)	Support hand (L)	Working position	Working hand (R)	Support hand (L)
16	9 h	-In abduction -Rested on the thumb of the left hand by the micromotor	-In abduction -Middle finger extended resting on the vestibular of the left upper central and lateral incisors	9 h	-In abduction -Rested on the thumb of the left hand by the micromotor	-In abduction -Index finger flexed moving cheek away on the right side
26	9 h	-In abduction -Rested on the thumb of the left hand by the micromotor	-In adduction -Index finger extended resting on the vestibular of the left upper premolars	9 h	-In abduction -Rested on the index finger of the left hand by the micromotor	-Neutral position -Thumb flexed moving the cheek away on the left side and index finger extended supporting micromotor head
36	11 h	-In adduction -Ring finger semi flexed resting on lower left lateral incisor and canine	-In adduction -Index finger flexed moving cheek away on the left side	11 h	-In abduction -Ring finger extended resting on chin	-In adduction -Thumb extended supporting micromotor head
46	11 h	-In adduction -Ring finger flexed resting on lower right central and lateral incisors	Free	11 h	-In abduction -Ring finger extended resting on right lower first molar	-In adduction -Thumb extended supporting micromotor head