A cleaning section (10; 110) of an electrical toothbrush having a motor and a drive shaft, the cleaning section (10; 110) comprising: a movable bristle holder (26; 126) structured to receive a drive motion from the motor via the drive shaft having a longitudinal axis, wherein the drive shaft is structured to oscillate around its longitudinal axis; a head (22; 122) including a first plurality of cleaning bristles (24; 124) arranged in a static bristle field and a second plurality of cleaning bristles (28; 128) supported within the movable bristle holder to have at least one freedom of motion relative to the first plurality of cleaning bristles; wherein the movable bristle holder (26; 126) is movable with respect to the head and the static bristle field such that a cleaning motion of the second plurality of cleaning bristles includes an oscillating movement relative to the first plurality of cleaning bristles, and wherein the oscillating movement of the second plurality of cleaning bristles is caused by the oscillating movement of the drive shaft; wherein the head further includes an opening (42; 142) sized to receive the movable bristle holder (26; 126) therein; wherein the opening is arranged at the backside of the head (22; 122); wherein the first plurality of cleaning bristles and the second plurality of cleaning bristles are arranged in rows generally transverse to the longitudinal axis, the cleaning motion comprising a rotation or reciprocating oscillation of the second plurality of cleaning bristles relative to the longitudinal axis; and wherein the first plurality of cleaning bristles and the second plurality of cleaning bristles are arranged in rows that alternate such that at least some of the rows of the second plurality of cleaning bristles are disposed between the rows of the first plurality of cleaning bristles, and at least some of the rows of the first plurality of cleaning bristles are disposed between the rows of the second plurality of cleaning bristles. a movable bristle holder (26; 126) structured to receive a drive motion from the motor via the drive shaft having a longitudinal axis, wherein the drive shaft is structured to oscillate around its longitudinal axis; a head (22; 122) including a first plurality of cleaning bristles (24; 124) arranged in a static bristle field and a second plurality of cleaning bristles (28; 128) supported within the movable bristle holder to have at least one freedom of motion relative to the first plurality of cleaning bristles; wherein the movable bristle holder (26; 126) is movable with respect to the head and the static bristle field such that a cleaning motion of the second plurality of cleaning bristles includes an oscillating movement relative to the first plurality of cleaning bristles, and wherein the oscillating movement of the second plurality of cleaning bristles is caused by the oscillating movement of the drive shaft; wherein the head further includes an opening (42; 142) sized to receive the movable bristle holder (26; 126) therein; wherein the opening is arranged at the backside of the head (22; 122); wherein the first plurality of cleaning bristles and the second plurality of cleaning bristles are arranged in rows generally transverse to the longitudinal axis, the cleaning motion comprising a rotation or reciprocating oscillation of the second plurality of cleaning bristles relative to the longitudinal axis; and wherein the first plurality of cleaning bristles and the second plurality of cleaning bristles are arranged in rows that alternate such that at least some of the rows of the second plurality of cleaning bristles are disposed between the rows of the first plurality of cleaning bristles, and at least some of the rows of the first plurality of cleaning bristles are disposed between the rows of the second plurality of cleaning bristles.