Soreness of the muscles after wearing the denture for sometime

 # A newly fabricated complete denture patient reports with the complaint of soreness of the muscles after wearing the denture for sometime. What could be the probable cause?

A. Increased interocclusal space

B. Decreased interocclusal space

C. Excessive muscular force on the denture

D. Repeated muscle trauma

The correct answer is: B. Decreased interocclusal space

Explanation:

Soreness of the muscles after wearing newly fabricated complete dentures is often due to a decreased interocclusal space (or excessive occlusal vertical dimension). When the interocclusal space is inadequate:

1. The denture teeth are set too far apart, increasing the vertical dimension of occlusion (VDO).
2. This forces the muscles of mastication to remain overly contracted, leading to muscle fatigue and soreness over time.
3. The patient may also experience difficulty closing their mouth comfortably or feel that the dentures are "too tall."

Other options:

• A. Increased interocclusal space: Excessive interocclusal space (reduced VDO) might cause overclosure of the jaws but typically leads to different problems like angular cheilitis and lack of proper function, rather than muscle soreness.
• C. Excessive muscular force on the denture: While excessive force can cause issues, it is usually secondary to improper fit or function, not a primary cause related to soreness.
• D. Repeated muscle trauma: This is uncommon with new dentures unless associated with improper extension or faulty design, but it is not the primary explanation in this case.

Key Takeaway:

Proper assessment of the vertical dimension and interocclusal space is crucial in denture fabrication to avoid muscular discomfort and ensure comfort during function.