Zone 4 corresponds to which surface?

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Prepare for the FPC 2 Exam 2 - understand Periodontal Screening and Recording (PSR) and improve your probing skills through quizzes with detailed explanations and hints. Ensure success in your exam!

Multiple Choice

Zone 4 corresponds to which surface?

Explanation:
Zone four maps to the distolingual surface. This surface is the back side of the tooth toward the tongue on the lingual aspect. In periodontal surface notation, surfaces are abbreviated to indicate location around the tooth, and the distolingual surface is the one labeled with DL, which corresponds to zone four. So this zone is not the facial surface (the outward front) or the distofacial surface (the back toward the cheek), but the lingual-back side of the tooth.

Zone four maps to the distolingual surface. This surface is the back side of the tooth toward the tongue on the lingual aspect. In periodontal surface notation, surfaces are abbreviated to indicate location around the tooth, and the distolingual surface is the one labeled with DL, which corresponds to zone four. So this zone is not the facial surface (the outward front) or the distofacial surface (the back toward the cheek), but the lingual-back side of the tooth.

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