A Saliva Ejector is a narrow, straw-like suction device used in dentistry to remove excess fluids—primarily saliva, water, and blood—from the oral cavity during dental procedures. Unlike High-Volume Evacuators (HVE), which are designed for heavy debris and aerosol control, the saliva ejector provides a steady, low-volume suction.
Description
A saliva ejector is a disposable, flexible tube made of medical-grade plastic (usually PVC). It contains a malleable internal wire that allows the clinician to bend and shape the tube to fit comfortably in the patient’s mouth, typically resting under the tongue or in the buccal fold (the space between the cheek and gums).
It is connected to the dental unit’s low-volume suction line and features a specialized tip designed to prevent the soft tissues of the mouth from being sucked into the tube.
Key Features
- Malleability: The internal copper or stainless steel wire allows the tube to hold its shape once bent, ensuring it stays in the desired position without constant manual adjustment.
- Non-Removable Filtered Tip: Most modern ejectors feature a smooth, rounded tip with multiple small holes or a “caged” design. This minimizes tissue “grabbing” and prevents the patient’s tongue or cheek from blocking the suction.
- Optimal Airflow: Designed for low-vacuum pressure, providing continuous suction that is gentle enough not to cause discomfort or mucosal trauma.
- Disposable/Single-Use: To maintain strict infection control standards, these are discarded after every patient.
Usage and Clinical Procedure
The saliva ejector is a staple in almost every dental procedure, from routine cleanings to complex restorative work.
| Step | Action |
| Positioning | Bend the ejector into a “U” or “S” shape. Place it in the floor of the mouth (sublingual area) on the side opposite the working site. |
| Suctioning | Activate the low-volume vacuum. The device will continuously pull fluid away as it accumulates, keeping the working field dry. |
| Tissue Protection | Ensure the tip is not directly pressed against the floor of the mouth or the duct of the submandibular gland to avoid irritation. |
| Backflow Prevention | Clinical Tip: Advise the patient not to close their lips tightly around the ejector tip. Closing the lips creates a seal that can cause “backflow” from the suction line into the patient’s mouth. |
Comparison: Saliva Ejector vs. HVE
| Feature | Saliva Ejector | High-Volume Evacuator (HVE) |
| Suction Power | Low volume, steady | High volume, powerful |
| Primary Goal | Removing liquid (saliva/water) | Removing debris and aerosols |
| Tube Diameter | Narrow (3mm to 5mm) | Wide (10mm to 16mm) |
| Operation | Often hands-free (rests in mouth) | Usually hand-held by the assistant |