What is a notable effect of high vertical dimension on dental function?

High vertical dimension refers to the space between the upper and lower jaws when the teeth are in occlusion. An increased vertical dimension can lead to changes in jaw mechanics and function, which is particularly relevant in relation to temporomandibular joint (TMJ) health.

When the vertical dimension is excessively increased, it can cause the jaws to close in a non-ideal position. This misalignment can contribute to clicking or popping noises during jaw movement, which are often symptoms of TMJ dysfunction. This occurs because the articular disc within the TMJ may not move smoothly along the condyle due to the altered relationship between the upper and lower jaw, leading to these audible sounds during movements such as opening or closing the mouth.

The other options involve factors that are less directly associated with high vertical dimension. Improved chewing efficiency might be seen with a well-balanced bite but is not a guarantee with excessive vertical height. Increased risk of periodontal disease and decreased salivary flow are more closely related to other factors like oral hygiene practices and systemic health rather than directly linked to an increased vertical dimension.