DANB General Chairside Practice Test

When a left-handed operator is preparing tooth #14 for a crown, positioning the bevel of the High Volume Evacuator (HVE) parallel to the lingual surface is the most effective choice. This alignment allows for optimal suction and fluid management in the operative area. By positioning the HVE in such a way, it effectively captures and removes debris, saliva, and other materials that may accumulate during the procedure on the lingual side of the tooth.

Additionally, this placement facilitates visibility and access for the operator, as the assistant can maintain suction without obstructing the operator's field of view. It also ensures that the suction device does not interfere with the operator's hands or instruments while working, which is particularly important in a left-handed setup where space and angles of approach differ from right-handed operators.

Positioning the HVE in this manner promotes efficiency and safety during the dental procedure, helping to maintain a clear working environment.