Which device is designed to hold burs, stones, and mandrels?

The device that is designed to hold burs, stones, and mandrels is indeed a straight handpiece. This type of handpiece serves as a critical tool in dental procedures, allowing practitioners to attach various rotary instruments, including burs for different cutting or finishing tasks, stones for polishing, and mandrels for holding abrasive materials.

A straight handpiece operates at low speeds, which is often preferable for specific applications that require precision and control, such as cavity preparation or crown adjustment. The design of the handpiece includes a chuck mechanism that securely holds these attachments in place during use, ensuring both stability and safety in dental procedures.

In contrast, other devices like electric handpieces typically serve a broader range of applications but may not specifically be the designed holder for burs and similar instruments. Suction devices are used to remove debris and fluids from the oral cavity, while hygienic containers are designed for storage, cleanliness, and infection control rather than for holding instruments during procedures.