HOSA Dental Terminology Practice

What does "crepitus" describe in the context of dental joints?

1. A strong and painful bite

2. Grinding, joint abrasion

3. The sound of a healthy joint

4. An improper occlusion

The correct answer is: Grinding, joint abrasion

In the context of dental joints, "crepitus" refers to the grinding or crunching sound that occurs when the surfaces of the temporomandibular joint (TMJ) move against one another. This sound is typically indicative of arthritis or other degenerative conditions affecting the joint, where cartilage is worn away, leading to friction between the bone surfaces. When a patient experiences crepitus, it often suggests that there may be underlying issues such as joint abrasion or other forms of joint dysfunction that can affect chewing and overall dental health. The other choices do not accurately relate to the meaning of crepitus. A strong and painful bite doesn't characterize the sound or feel of a joint. A healthy joint would not produce crepitus, as that signifies proper functioning without abrasion. Improper occlusion refers to how the teeth come together, which does not specifically involve joint sounds or the articulatory mechanics indicated by crepitus. Therefore, grinding and joint abrasion is the most fitting description for this term.