A five - wheel dental chair with a backrest is an essential piece of equipment in a dental clinic. It is designed with five wheels, which allow for easy movement and positioning within the treatment room. The backrest provides comfort and support for patients during dental procedures. It can usually be adjusted to different angles to accommodate various treatment needs, ensuring that patients can lie in a relaxed and comfortable position. The chair is typically made of durable materials that are easy to clean and maintain. Its ergonomic design helps dentists work more efficiently and provides a better experience for patients.