Before you start

• •EPA-registered surface disinfectant (hospital-level, compatible with OSHA bloodborne pathogen standard)
• •New barrier covers: light handles, headrest, chair controls, air/water syringe handle, bracket table
• •Clean instrument cassette for next patient's procedure
• •PPE: new gloves, mask, and eye protection after each patient

The procedure

Step-by-step, in order. Each step has the action and the reason it matters.

1. 1

   Don PPE before patient dismissal cleanup begins

   Before touching any contaminated surface, put on utility gloves, mask, and eye protection. Do not begin cleanup with examination gloves — utility gloves protect against sharps and chemical exposure.

   Why: Examination gloves are not puncture-resistant. A contaminated instrument under a barrier is a needlestick waiting for an under-protected hand.

2. 2

   Remove all single-use barrier covers and dispose

   Remove all barrier covers in the correct order: light handles, headrest cover, chair control cover, air/water syringe handle, bracket table cover. Bag and discard all in the clinical waste container. Do not reuse any cover.

   Why: Barrier covers are OSHA-required protection for non-sterilizable surfaces. Skipping or reusing them is a documented infection control deficiency.

3. 3

   Remove and contain all instruments

   Pick up all used instruments (mirrors, explorers, scalers, burs) and place in the instrument cassette or tray for transport to sterilization. Do not place loose sharps in the hand. Use the cassette.

   Why: Loose sharps during turnaround is how dental assistants get needlestick injuries. Cassette-in, cassette-out is the OSHA-compliant standard.

4. 4

   Spray and wipe all uncovered surfaces — contact time is required

   Spray all clinical surfaces: chair, delivery unit, light handle base, bracket table surface, cuspidor. Let disinfectant dwell for the full contact time per the product label (typically 30 seconds to 10 minutes depending on product). Wipe with a clean cloth. Spray again and leave wet — spray-wipe-spray is the EPA-cleared protocol.

   Why: Wiping immediately after spraying defeats the disinfectant. The active ingredient cannot kill pathogens in under the required contact time. This is the most commonly failed step in infection control audits.

5. 5

   Apply new barrier covers before the next patient

   After surfaces dry, apply fresh barrier covers to all required surfaces: light handles, headrest, chair controls, air/water syringe, bracket table. Do not apply barriers over wet disinfectant.

   Why: Barriers applied over wet disinfectant trap moisture and can cause adhesive failure and recontamination.

6. 6

   Set up the instrument tray for the next patient's procedure

   Retrieve the sterilized instrument cassette for the next procedure from sterilization. Inspect packaging: uncompromised seal, correct chemical indicator, package not damp. Open at chairside in front of the patient — not in the hallway.

   Why: Opening sterile packs in front of the patient is both the OSHA standard and the single most trust-building act a dental assistant performs.

7. 7

   Confirm room is ready before seating the next patient

   Final check: barriers on, chair adjusted for procedure, light positioned, suction operational, bib holder with fresh bib. Sign off on the turnaround log if your practice requires it.

   Why: A patient seated in an incompletely turned-over room discovers the problem themselves — and they tell people.

Verify when done

• ☐All single-use barriers removed and disposed
• ☐All instruments contained in cassette for sterilization
• ☐Surfaces disinfected with correct contact time (spray-wipe-spray protocol)
• ☐New barriers applied before next patient
• ☐Sterile pack integrity confirmed before opening

Common mistakes

• ✕Wiping immediately after spraying without allowing contact time
• ✕Applying barriers before surfaces are dry
• ✕Opening sterile packs in the hallway before seating the patient
• ✕Skipping the sterilization pack integrity check

Trainer notes

The contact time step is the most commonly rushed. Wiping immediately after spraying is a habit from housekeeping that carries over from prior experience. Break it in training: spray, walk away for 30 seconds, come back and wipe.

Common questions