**Core Concept**
Immediate denture involves the fabrication and placement of a denture soon after tooth extraction. The primary goal is to maintain the soft tissue and prevent shrinkage, ensuring an optimal fit for the final denture. This is achieved through the use of a clear acrylic stent or surgical template.

**Why the Correct Answer is Right**
The clear acrylic stent or surgical template is given soon after extraction to maintain the shape of the alveolar ridge and surrounding soft tissues. This helps in preventing shrinkage and collapse of the tissues, which can lead to an ill-fitting final denture. The stent or template acts as a mold, maintaining the space and guiding the soft tissue healing process. By doing so, it ensures an optimal environment for the placement of the final denture.

**Why Each Wrong Option is Incorrect**
**Option A:** Immediate placement of a denture without a stent or template can lead to tissue shrinkage and an ill-fitting denture. This is because the denture can displace the soft tissues, affecting the healing process and final denture fit.
**Option B:** The use of a stent or template is not primarily for aesthetic purposes, but rather to maintain the soft tissue and alveolar ridge shape.
**Option C:** While antibiotics may be prescribed to prevent infection, they do not play a direct role in maintaining the shape of the alveolar ridge or soft tissues.
**Option D:** The use of a stent or template is not a substitute for proper denture fabrication and fitting, but rather a tool to aid in the process.

**Clinical Pearl / High-Yield Fact**
A clear acrylic stent or surgical template should be given to the patient as soon as possible after tooth extraction to prevent tissue shrinkage and ensure an optimal fit for the final denture.

**Correct Answer:** C.