In the interarch-ridge relationship of severely atrophied edentulous jaws, how does the maxilla compare to the mandible?

In the context of severely atrophied edentulous jaws, the interarch relationship highlights critical anatomical differences between the maxilla and the mandible. In cases of significant resorption of the alveolar ridges, particularly after tooth loss, the maxilla typically becomes narrower in width compared to the mandible.

This narrowing is due to the differing rates and patterns of bone resorption that occur in these two areas. The maxilla is subjected to more pronounced resorption, which can affect its overall shape and size significantly. As the facial skeletal structure loses support from the teeth, the maxilla may shrink inward, creating a narrower ridge relative to the mandible.

This crucial understanding informs treatment planning for prosthetic rehabilitation, as the differences in ridge width influence the design and placement of dental prosthetics. Taking the narrower maxilla into account is essential for achieving proper fit and function for dentures and other prosthetic devices.

Understanding these anatomical relationships is important for clinicians, as it informs how they approach the management and restoration of patients with severe bone atrophy.