**Core Concept**
The Lecompte guidelines provide recommendations for the safe and effective use of high-potency fluoride products in dental procedures. These guidelines aim to minimize the risk of fluoride toxicity and ensure patient safety. The guidelines specify the amount of fluoride product to be used, the type of trays to be used, and the instructions for the patient after the procedure.

**Why the Correct Answer is Right**
The correct answer is **C. Following the procedure, the patient should be instructed not to expectorate**. This is because high-potency fluoride products can cause gastrointestinal irritation and toxicity if swallowed. Instructing the patient to expectorate (spit out) the fluoride product after the procedure is essential to prevent this risk. The Lecompte guidelines emphasize the importance of proper patient instruction to minimize the risk of fluoride toxicity.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is correct according to the Lecompte guidelines, which recommend that no more than 2 g of gel per tray or approximately 40% of tray capacity should be dispensed.

**Option B:** This option is correct according to the Lecompte guidelines, which recommend the use of a saliva ejector during the procedure to minimize the risk of fluoride toxicity.

**Option D:** This option is correct according to the Lecompte guidelines, which recommend that when utilizing custom individually fitted trays, only 5-10 drops of products per tray should be used.

**Clinical Pearl / High-Yield Fact**
It is essential to follow the Lecompte guidelines when using high-potency fluoride products to minimize the risk of fluoride toxicity and ensure patient safety. Patients should be instructed to expectorate the fluoride product after the procedure and to avoid swallowing it to prevent gastrointestinal irritation and toxicity.

**Correct Answer Line**
✓ Correct Answer: C. Following the procedure, the patient should be instructed not to expectorate.