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Complete class 1
using #330 bur
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Extend occlusal
outline to marginal ridge
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Switch to #245
Bur - 3 mm length
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Sweep bur
buccolingually in a pendulum motion
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and in a gingival
direction.
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Break contacts
and check with explorer
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Axial wall should
follow external contour
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Width of isthmus
1/2 of occlusal table
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Proximal box
widest at gingival margin
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Rounded
axiopulpal line angle
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No bevel at the
gingival margins
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