Tcs

Fig. 9-7. A, The cervical shoulder is established as the tooth structure between the depth grooves is removed. The rotary instrument is moved parallel to the intended path of withdrawal during this procedure. B, The facial reduction should be completed in two phases, initially maintaining one half intact for assessment of the adequacy of reduction. Note the two distinct planes of reduction on the facial. The proximal aspect parallels the cervical reduction on the facial wall. C, Facial reduction completed. A 6-degree taper has been established between the proximal walls.

Fig. 9-7. A, The cervical shoulder is established as the tooth structure between the depth grooves is removed. The rotary instrument is moved parallel to the intended path of withdrawal during this procedure. B, The facial reduction should be completed in two phases, initially maintaining one half intact for assessment of the adequacy of reduction. Note the two distinct planes of reduction on the facial. The proximal aspect parallels the cervical reduction on the facial wall. C, Facial reduction completed. A 6-degree taper has been established between the proximal walls.

preparation, because a significant amount of tooth structure is being removed and copious irrigation (along with intermittent strokes) will expedite the preparation process. Such a cautious approach will prevent unnecessary trauma to the pulp. The resulting shoulder

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