Which areas are identified as primary and secondary support for a mandibular denture?

The primary support for a mandibular denture is typically the buccal shelf because it consists of dense bone and provides a stable foundation for the denture. This area is less affected by the resorption of the alveolar ridge, making it a critical region for distributing occlusal forces effectively. The buccal shelf is situated in a favorable position relative to the occlusion and helps in stabilizing the denture throughout various functional movements.

The secondary support is derived from the alveolar ridge, which, although it plays a significant role in supporting the denture, is more subject to changes due to resorption, particularly after tooth extraction. Hence, while the alveolar ridge does contribute to the support of a mandibular denture, it is regarded as secondary compared to the more stable buccal shelf.

This differentiation is essential in prosthodontics as it influences the design and fit of the denture, ensuring maximum retention and stability during function. Understanding the roles of these anatomical areas helps in providing effective and comfortable prosthetic solutions for patients.