8.1 CDC Infection Control Standards & Instrument Sterilization

8.1 Infection Prevention and Instrument Processing

Standard precautions

Rule 108.24 specifies sterilization, disinfection, contaminated-item handling, and testing of sterilizer adequacy in accord with ADA recommendations. Current CDC dental guidance supplies additional evidence-based practice detail. Apply standard precautions to every patient: hand hygiene, appropriate personal protective equipment, respiratory hygiene, sharps safety, safe injection practices, sterilization and disinfection, environmental cleaning, and occupational-exposure planning.

Use transmission-based or additional precautions when indicated. A patient’s appearance or disclosure does not justify weaker precautions, and universal gloving does not replace hand hygiene.

Instrument classification

Classify items by risk:

• Critical items penetrate soft tissue or bone and are heat sterilized after cleaning.
• Semicritical items contact mucous membranes; heat sterilize when heat tolerant and otherwise use the legally acceptable high-level process.
• Noncritical items contact intact skin and receive appropriate cleaning and disinfection.

Dental handpieces and removable intraoral components are cleaned and heat sterilized between patients according to manufacturer instructions. Surface wiping alone is insufficient. Single-use devices are discarded after one patient and are not reprocessed merely to reduce cost.

Processing workflow

Separate contaminated receiving, cleaning, packaging, sterilization, cooling, and clean storage. Use puncture-resistant transport, utility gloves for cleaning, validated ultrasonic or mechanical cleaning where appropriate, packaging indicators, correct loading, and cycle parameters. Release items only after required checks. Wet, torn, or compromised packages are reprocessed.

Maintain manufacturer instructions for instruments and sterilizers. A shortened cycle is lawful only if validated for the load and packaging.

Sterilization monitoring

Use multiple controls:

1. Mechanical: time, temperature, and pressure for each cycle.
2. Chemical: internal and external indicators appropriate to the package and process.
3. Biological: spore testing at least weekly under CDC dental guidance and after installation, relocation, repair, or suspected failure as applicable.

A positive biological indicator requires immediate evaluation, quarantine or recall decisions, repeat testing, equipment service, and documentation under the recommended protocol. A passing chemical strip cannot override a failed biological monitor.

Keep records sufficient to trace loads and demonstrate compliance, but do not invent a universal Texas rule that every spore log must be retained exactly three years. Follow Rule 108.24, incorporated guidance, manufacturer requirements, and any longer facility or accreditation standard.

Dental-unit water

For routine nonsurgical treatment, output water should meet the EPA drinking-water quality benchmark of no more than 500 CFU/mL of heterotrophic bacteria. Use treatment products, flushing, testing, and shock protocols compatible with the unit. Visual clarity does not prove microbial quality.

For surgical procedures, use sterile water or sterile saline delivered through sterile tubing or a sterile delivery device. Ordinary dental-unit water is not surgical irrigant even if a recent test met 500 CFU/mL.

Exposure and injection safety

Never reuse needles or syringes for another patient, and enter medication containers with aseptic technique. Prefer single-dose containers for one patient. After a sharps exposure, wash the area, report immediately, obtain source and exposed-person evaluation under law, begin indicated prophylaxis promptly, and document confidentially.

Environmental and respiratory controls

Clean then disinfect clinical contact surfaces with an appropriate registered product and contact time. Use barriers on difficult-to-clean surfaces and change them between patients. Maintain evacuation systems, safe amalgam or chemical handling, and water management. Screen respiratory symptoms and apply current public-health guidance without discriminatory denial of urgent care.

Applied distinctions

A weekly spore test evaluates sterilization, while a waterline test evaluates unit water; neither substitutes for the other. A handpiece is heat sterilized, not merely surface disinfected. Sterile saline delivered through the ordinary unit bottle and nonsterile lines is not a sterile surgical system.

Written plan and staff competence

The practice’s infection-control coordinator maintains written policies, training, exposure control, immunization and post-exposure resources, water management, and product instructions. Observe actual work: a perfect manual cannot compensate for skipped hand hygiene, overfilled sharps containers, or packages stored wet.

When new equipment or a product is introduced, reconcile its instructions with the sterilizer, waterline, and surface materials. Incompatible chemicals can damage equipment or fail required contact time. Train temporary staff before clinical assignment and document competency.

Immunization and work restrictions

Offer occupationally indicated vaccination and manage exposure under the written plan. Staff illness and bloodborne-pathogen status require confidential, evidence-based work restrictions rather than stigma. Use occupational-health guidance to decide when a worker may safely perform exposure-prone procedures. A worker’s private diagnosis should not be placed in a patient chart or casually disclosed to coworkers, while actual exposure notifications follow the applicable protocol.