What can insufficient interocclusal space lead to?

Insufficient interocclusal space can lead to difficulties in swallowing primarily because of the confined space it creates between the upper and lower dental arches. When the space is insufficient, the normal jaw movements needed for swallowing can be compromised, making it difficult for the individual to properly align their teeth for effective swallowing. This reduced space can inhibit the safe transit of food down the esophagus, contributing to discomfort or difficulty during the act of swallowing.

Other effects, such as gum recession or teeth grinding, typically result from different factors unrelated to interocclusal space. Improved mastication is also unlikely as adequate interocclusal space generally enhances the ability to chew effectively, rather than diminish it. Thus, the correct answer highlights a specific consequence of inadequate interocclusal space that directly affects swallowing function.