All of the following fulcrum placements will aid in effectively scaling heavy calculus deposits with periodontal pockets in the maxillary right posteriors except:

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An intraoral fulcrum on the maxillary right posterior is not effective in scaling periodontal pockets because access is difficult, and closed or open blade adaptation is a probable occurrence. Extraoral fulcrum placement positions the instrument to access and adapt periodontal pockets. Opposite arch fulcrum placement allows instruments to be extended and adapt to periodontal pockets. Palm up fulcrum placement is needed for stability when scaling the maxillary right posteriors with periodontal pockets.

All of the Following Fulcrum Placements Will Aid in Effectively