**Core Concept**
Sodium fluoride is used in the treatment of otosclerosis, a type of bone disease that affects the middle ear. The mechanism of action of sodium fluoride involves its incorporation into the hydroxyapatite crystals of the bone, making the bone more resistant to resorption and thereby reducing the progression of the disease.

**Why the Correct Answer is Right**
Sodium fluoride works by inhibiting osteoclast activity, which are the cells responsible for bone resorption. By reducing osteoclast activity, sodium fluoride helps to decrease the rate of bone turnover and prevent further destruction of the middle ear bones. This mechanism is thought to be due to the inhibition of the enzyme carbonic anhydrase, which is involved in the regulation of osteoclast activity.

**Why Each Wrong Option is Incorrect**
* **Option A:** Not a relevant statement about sodium fluoride in otosclerosis.
* **Option B:** Not a relevant statement about sodium fluoride in otosclerosis.
* **Option C:** Not a relevant statement about sodium fluoride in otosclerosis.

**Clinical Pearl / High-Yield Fact**
It's essential to note that sodium fluoride is typically used as an adjunct to surgical treatment of otosclerosis, such as stapedotomy or stapedectomy, and is not a standalone treatment for the disease.

**Correct Answer: D. All of the statements are true.