Material of choice for single-step border moulding is
**Core Concept**
Single-step border moulding is a technique used in removable partial dentures to create a border seal around the edentulous area. The material used for this process should have adequate strength, flexibility, and dimensional stability to ensure a proper seal and prevent tissue irritation.
**Why the Correct Answer is Right**
The material of choice for single-step border moulding is a self-curing silicone-based material. This material is ideal due to its excellent flexibility, dimensional stability, and ability to flow and adapt to the border area during the moulding process. The self-curing properties of this material allow for a quick and efficient process, making it a popular choice among dentists.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not mention a specific material, making it a vague and unhelpful choice.
**Option B:** This option is incorrect because it is not a suitable material for single-step border moulding due to its lack of flexibility and dimensional stability.
**Option C:** This option is incorrect because it is a cold-curing material, which may not provide the necessary flow and adaptability required for a proper seal.
**Clinical Pearl / High-Yield Fact**
To ensure a proper seal during single-step border moulding, the material should be allowed to flow and adapt to the border area before it sets. This can be achieved by using a material with self-curing properties and by using a border moulding technique that allows for adequate flow and adaptation.
**Correct Answer:** C. Self-curing silicone-based material.