A wrought wire clasp is a ______ clasp.

A wrought wire clasp is a ______ clasp.

• A. Infrabulge clasp
• B. Suprabulge clasp
• C. Circumferential clasp
• D. Retentive clasp

Answer: (B)

A wrought wire clasp is a suprabulge clasp. The way a wrought wire clasp provides retention is by engaging an undercut above the tooth’s height of contour, on the facial/buccal surface, using a flexible wire that sits over the contour. This places the retentive portion above the height of contour, hence suprabulge. Infrabulge clasps, by contrast, engage undercuts below the height of contour and often involve more tooth coverage or subgingival contact, which isn’t how a wrought wire clasp is typically designed. The other descriptors describe shape around the tooth or generic retention, but don’t specify the positional relationship to the height of contour like suprabulge does.

A wrought wire clasp is a suprabulge clasp.

The way a wrought wire clasp provides retention is by engaging an undercut above the tooth’s height of contour, on the facial/buccal surface, using a flexible wire that sits over the contour. This places the retentive portion above the height of contour, hence suprabulge.

Infrabulge clasps, by contrast, engage undercuts below the height of contour and often involve more tooth coverage or subgingival contact, which isn’t how a wrought wire clasp is typically designed. The other descriptors describe shape around the tooth or generic retention, but don’t specify the positional relationship to the height of contour like suprabulge does.