When might incisor rests be used in denture placement?

Incisor rests are typically used on mandibular incisors for several reasons in removable partial denture (RPD) design. They provide a stable and supportive area for the denture framework, ensuring that the forces during function are properly distributed. Mandibular incisors often serve as strategic points for the denture since they help support the anterior portion of the denture while also preventing dislodgment when chewing or speaking.

In contrast, using incisor rests exclusively on maxillary incisors or only in completely edentulous arches would not take full advantage of their functional benefits. Additionally, the use of clasps on molars is not the primary scenario for employing incisor rests, as the purpose of clasp placement and rest design focus more on the posterior segments of the dentition and stability of the RPD during function.

Thus, the use of incisor rests on mandibular incisors plays a crucial role in enhancing the overall stability and effectiveness of the removable partial denture.