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Claire J
Claire J

Which instrument type and cross-sectional shape are matched correctly?

Which instrument type and cross-sectional shape are matched correctly?

5/31/2016 8:02:07 AM   |   Comments: 0   |   Views: 242

(A). Explorer - half moon
(B). Universal curette - circle
(C). Sickle - triangle
(D). Area-specific curette - rectangle


The design of the working end and its cross-sectional shape are directly related to the function of the instrument.

  • Half-moon cross-sectional shape instrument: rounded at the back. Used subgingivally to protect the soft tissues. E.g., universal curette, area-specific curette.
  • Triangular cross-sectional shape instrument: pointed at the back. Used only supragingivally (to avoid damage to subgingival tissues). E.g., sickle.
  • Circular cross section: explorers have a circular cross section with a thin end that detects deposits.

 

Answer: (C). Sickle - triangle



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