Which rest type is described as having a rounded notch at the proximo-incisal angle and is beveled labially and lingually?

Which rest type is described as having a rounded notch at the proximo-incisal angle and is beveled labially and lingually?

• A. Occlusal rest
• B. Incisal rest
• C. Crescent rest
• D. Lug/ball rest

Answer: (B)

The rest described is an incisal rest. Rest seats are built into the tooth to provide vertical support for an RPD and to resist dislodgement by functional forces. An incisal rest is placed on the incisal edge of an anterior tooth and is characterized by a rounded notch at the proximo‑incisal angle. The labial and lingual bevels create a broad, smooth rest seat on both sides of the incisal edge, helping the rest sit flush, distribute load across the incisal region, and avoid sharp stress concentrations. This design is chosen when anterior tooth structure can bear loading and provides effective vertical support in tooth‑tissue‑supported cases. Other rest forms don’t feature this notch at the proximo‑incisal angle with simultaneous labial and lingual bevels, which is why this description fits the incisal rest.

The rest described is an incisal rest. Rest seats are built into the tooth to provide vertical support for an RPD and to resist dislodgement by functional forces. An incisal rest is placed on the incisal edge of an anterior tooth and is characterized by a rounded notch at the proximo‑incisal angle. The labial and lingual bevels create a broad, smooth rest seat on both sides of the incisal edge, helping the rest sit flush, distribute load across the incisal region, and avoid sharp stress concentrations. This design is chosen when anterior tooth structure can bear loading and provides effective vertical support in tooth‑tissue‑supported cases. Other rest forms don’t feature this notch at the proximo‑incisal angle with simultaneous labial and lingual bevels, which is why this description fits the incisal rest.