CLASS II CAVITIES
¨Due to presence of broad
contact area, the gingival floor of the proximal box should be wide
¨The box should converge
occlusally with the buccal and lingual wall paralleling the external tooth
surface .the walls of proximal box should meet the occlusal wall in a straight
line
¨The wall of proximal box
should not flared
¨Isthmus should not exceed
1/3rd of the intercuspal width in primary molars
¨Sharp cavosurface angle
¨Rounded/beveled/grooved/axiopulpal
line
angle to reduce stresses on this point
¨Greater width of the
proximal box, more buccolingual extension of the gingival floor
¨Occlusal convergence
¨Axial wall should follow
the contour of the external surface
¨Retention growth should
not be given
¨Avoid the mesiobuccal pulp
horn from exposure in case of small first molar
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