What happens to the resting face height in edentulous patients when a lower denture is inserted?

When a lower denture is inserted in edentulous patients, the resting face height typically increases. This increase occurs because the denture provides support to the existing oral and facial structures, which can help restore the vertical dimension of occlusion that is often lost in edentulous individuals.

In the absence of teeth, the surrounding soft tissues and the bones of the jaw can undergo resorption, leading to a decrease in facial support and a reduction in facial height. When a lower denture is placed, it fills the space that was previously vacant, helping to regain a more natural appearance and function. This restoration of vertical dimension can improve both aesthetics and function for the patient.

The other choices do not accurately reflect the physiological changes associated with denture insertion. For instance, saying that the resting face height decreases when the head is tilted back or remains unchanged over time overlooks the significant role that dentures play in maintaining facial structure. Additionally, the option suggesting that height increases only in younger patients fails to recognize that edentulous patients of all ages can experience changes upon denture insertion.