**Core Concept**
A complete ceramic crown is a type of dental restoration that offers aesthetic appeal and durability. However, like any other dental material, it has its limitations and disadvantages. The underlying principle being tested here is the evaluation of the pros and cons of using ceramic crowns in dentistry.

**Why the Correct Answer is Right**
The main disadvantage of a complete ceramic crown is its brittleness and susceptibility to fracture. Ceramic crowns are made from a hard, non-metallic material that can be prone to cracking or shattering under excessive stress or pressure. This limitation is due to the inherent properties of ceramic materials, which lack the flexibility and ductility of metal-based restorations. Additionally, ceramic crowns can be more expensive than other types of crowns, making them less accessible to some patients.

**Why Each Wrong Option is Incorrect**
* **Option A:**
This option is incorrect because while ceramic crowns may be more expensive than some other types of crowns, this is not the primary disadvantage being referred to.
* **Option B:**
This option is incorrect because ceramic crowns are not inherently prone to corrosion, unlike metal-based restorations.
* **Option C:**
This option is incorrect because ceramic crowns are known for their aesthetic appeal and can be used to restore the natural appearance of teeth.

**Clinical Pearl / High-Yield Fact**
A key consideration when choosing between ceramic and metal crowns is the patient's lifestyle and oral habits. Ceramic crowns may be more suitable for patients with a low bite force or those who are prone to grinding or clenching their teeth.

**Correct Answer: C. Aesthetics are not the primary concern in this context.**