Which of the following accurately describes bruxism?

Bruxism is characterized as the grinding of teeth, often occurring unconsciously during sleep or due to stress and anxiety. This condition can lead to various dental issues, such as worn-down teeth, jaw pain, headaches, and temporomandibular joint disorders. It's important for dental professionals to recognize bruxism as it may require interventions like night guards, stress management techniques, or adjustments in dental treatment plans to protect the patient's oral health.

The other options do not accurately define bruxism. Prolonged use of braces is related to orthodontic treatment, swallowing difficulties pertain to issues in the esophagus or throat, and spacing between teeth involves dental spacing concerns, none of which directly relate to the involuntary grinding characteristic of bruxism.