**Core Concept**
A computer-controlled injection system is a device used in dentistry to deliver anesthetics in a controlled and precise manner, reducing the risk of nerve injury and improving patient comfort. This technology relies on a computer algorithm to adjust the flow rate of the anesthetic solution based on the patient's response, ensuring a smooth and efficient administration.

**Why the Correct Answer is Right**
The WAND is a type of computer-controlled injection system that uses a disposable, single-use cartridge to deliver anesthetic solution. It features a unique design that allows for precise control over the flow rate and pressure of the anesthetic, reducing the risk of nerve damage and improving patient comfort. The WAND's computer algorithm continuously monitors the patient's response and adjusts the flow rate in real-time to ensure a comfortable and effective administration of the anesthetic.

**Why Each Wrong Option is Incorrect**
**Option A:** CCD (Charge-Coupled Device) is a type of image sensor used in digital cameras and other imaging devices, unrelated to computer-controlled injection systems.
**Option C:** CCI (Computer-Controlled Injection) is a generic term that could refer to any computer-controlled injection system, but it is not a specific brand or device like the WAND.
**Option D:** JET is a type of dental handpiece used for drilling and cutting, but it is not a computer-controlled injection system.

**Clinical Pearl / High-Yield Fact**
The WAND is a popular choice among dentists due to its ease of use and effectiveness in reducing patient anxiety and discomfort during anesthetic administration. It is also a good option for patients who have experienced nerve damage or other complications from traditional anesthetic injections.

**✓ Correct Answer: B. WAND**