Dental Infection Control: A Practical Guide to CQC Compliance and HTM 01-05
- Liam
- 10 hours ago
- 9 min read
Effective dental infection control protects patients, dental professionals and visitors from avoidable exposure to infectious organisms. It also provides important evidence that a dental practice is safe, properly governed and meeting its regulatory responsibilities.
However, infection prevention and control is not achieved simply by having a policy or completing an annual audit. Dental practices need reliable day-to-day systems covering hand hygiene, environmental cleaning, instrument decontamination, equipment testing, personal protective equipment, sharps, waste and dental unit waterlines.
This guide explains the principal dental infection control requirements in England, including what the Care Quality Commission may examine and how practices can demonstrate compliance with HTM 01-05: Decontamination in Primary Care Dental Practices.
What are the infection control requirements for dental practices?
Registered dental providers must meet the fundamental standards established by the Health and Social Care Act 2008 regulations.
Infection prevention and control is particularly relevant to:
Regulation 12: Safe care and treatment
Regulation 15: Premises and equipment
Regulation 17: Good governance
Regulation 18: Staffing
Providers must also have regard to the Health and Social Care Act 2008 Code of Practice on the prevention and control of infections and related guidance.
The CQC Dental Mythbuster 38 explains how CQC approaches infection control in dental practices. It highlights the importance of good leadership, a suitable infection control policy, an identified IPC lead and an audit programme that results in improvements.
For dental instrument decontamination, the principal technical guidance remains HTM 01-05. Although the current edition was published in 2013, NHS England continues to publish it as the applicable guidance for decontamination in primary care dental practices.
HTM 01-05 distinguishes between:
Essential quality requirements, which practices should already meet
Best practice, which practices should work towards through planned improvements
Where a practice has not yet achieved every best-practice recommendation, it should be able to explain why, demonstrate that essential requirements are met and provide a documented improvement plan.
Appoint a dental infection control lead
Every dental practice should have an identified infection prevention and control lead with sufficient knowledge, authority and time to oversee the practice’s arrangements.
The IPC lead does not have to complete every infection control task personally. However, the role should include:
maintaining the IPC policy and procedures
monitoring compliance with HTM 01-05
coordinating infection control audits
reviewing cleaning schedules and records
monitoring decontamination equipment records
identifying training needs
investigating incidents and recurring problems
reporting findings to the registered manager or provider
ensuring agreed improvements are completed
CQC states that the IPC lead should have the authority to lead and implement change. Giving someone the title without providing training, time or management support is unlikely to create an effective system.
Deputy arrangements should also be considered so that essential checks continue during absence or leave.
Maintain a practice-specific infection control policy
The infection control policy should reflect the actual premises, equipment, staffing and clinical activities of the practice.
A generic policy that refers to equipment the practice does not own, or describes processes staff do not follow, can create additional risk. It may also undermine confidence in the practice’s governance.
The policy should cover areas such as:
hand hygiene
personal protective equipment
staff immunisation and occupational health
management of inoculation injuries
instrument transportation and decontamination
single-use devices
environmental cleaning
dental unit waterlines
sharps management
clinical waste
blood and bodily-fluid spillages
management of impressions and appliances
laundry and clinical clothing
staff training
audit and monitoring
management of infection control incidents
The policy should identify who is responsible for each process, where records are kept and what staff must do if a system or piece of equipment fails.
It should be accessible to staff and reviewed regularly, including after significant incidents, changes to equipment, alterations to the premises or new guidance.
Follow a controlled decontamination workflow
HTM 01-05 describes instrument decontamination as a multi-stage process involving cleaning, disinfection where applicable, inspection and sterilisation.
The workflow should move in one direction from dirty to clean. Used instruments should not cross back into clean areas or come into contact with sterilised instruments.
A typical process includes:
Safe transfer of contaminated instruments from the surgery.
Segregation of reusable and single-use items.
Cleaning using an appropriate method.
Rinsing and drying.
Inspection under suitable lighting, preferably with magnification.
Sterilisation using a validated steam steriliser.
Packaging where applicable.
Storage in a clean, dry and protected environment.
Contaminated instruments should be transported in a secure, clearly identified container and processed as soon as reasonably practicable. Instruments should not be left until debris has dried onto their surfaces.
Single-use devices must not be reprocessed for reuse. They should be used for one treatment episode and then disposed of safely.
Separate dirty and clean areas
The decontamination environment must minimise the risk of clean instruments becoming recontaminated.
Best practice under HTM 01-05 is to carry out decontamination in a room that is separate from the clinical treatment area. The room should provide a clear flow from the receiving and cleaning area towards inspection, sterilisation and clean storage.
Where a practice cannot provide a separate decontamination room, it must still meet the essential quality requirements. This requires a carefully controlled process with clear separation between dirty and clean activity.
Decontamination in a treatment room should not take place while a patient is present. The area and relevant surfaces must be cleaned between the clinical and decontamination processes. The practice should also have a documented plan explaining how it intends to progress towards best practice where improvements are reasonably achievable.
Use validated cleaning methods
Cleaning is essential because sterilisation cannot compensate for an instrument that remains contaminated with blood, tissue or other debris.
HTM 01-05 identifies a validated washer-disinfector as the preferred method for cleaning reusable dental instruments. Automated cleaning provides a more consistent and reproducible process than manual cleaning.
Where manual cleaning remains necessary, the practice should have:
a written procedure
staff trained and assessed as competent
a dirty-to-clean workflow
separate sinks or bowls for washing and rinsing
detergent formulated for dental instrument cleaning
controlled water temperature and detergent concentration
long-handled brushes in a good condition
appropriate heavy-duty gloves, apron and facial protection
a process for inspecting instruments after cleaning
Household washing-up liquid, hand soap and chlorhexidine hand scrub are not suitable substitutes for an instrument-cleaning detergent.
Ultrasonic cleaners may be used where appropriate, but they must be operated, tested and maintained in accordance with the manufacturer’s instructions and applicable guidance.
Inspect instruments before sterilisation
Every reusable instrument should be examined after cleaning and before sterilisation.
The inspection should confirm that the instrument is:
visibly clean
free from residual material
dry
undamaged
functioning correctly
suitable for further use
Task lighting and a magnifying device can make this inspection more effective.
Damaged, corroded or persistently contaminated instruments should be removed from use. Instruments sent for repair should first be decontaminated and clearly identified as having been through the decontamination process.
Dental handpieces must be cleaned, lubricated where required and sterilised in accordance with the manufacturer’s instructions. External surface wiping alone is not an adequate method of decontaminating a reusable handpiece.
Validate and test decontamination equipment
Autoclaves, washer-disinfectors and ultrasonic cleaners should be fit for purpose, commissioned correctly, maintained and tested at the required intervals.
For sterilisation cycles, practices should retain records showing information such as:
date
steriliser identification
cycle number
cycle type
temperature and pressure achieved
result
operator identity
HTM 01-05 requires appropriate daily and periodic testing. For benchtop sterilisers, daily checks normally include an automatic control test. Vacuum sterilisers also require an appropriate steam penetration test. Results should be recorded before the steriliser is used for routine instrument processing.
If a test fails, the equipment should be taken out of use and advice obtained from the manufacturer, service engineer or other competent person. Instruments processed during an unsuccessful cycle must not be used.
Service reports, validation certificates, fault records and evidence of corrective action should be readily available.
Package and store instruments safely
Sterilised instruments must be protected from damage, moisture and contamination.
Wrapped instruments may be stored for up to 12 months where the packaging remains intact and the practice has a system to ensure this period is not exceeded. Packaging should be dated or otherwise traceable, with stock rotated appropriately.
Different controls apply to unwrapped instruments. Instruments stored unwrapped in a clinical area should be reprocessed at the end of the working day, or at the beginning of the next working day. Unwrapped instruments kept in a suitable clean, non-clinical area may be stored for up to one week.
Storage cupboards should be cleanable, dry, protected from direct sunlight and positioned away from sources of contamination. Sterilised instruments should not be stored on open work surfaces.
Maintain hand hygiene and PPE standards
Hand hygiene facilities should be readily available and support effective technique.
Clinical hand-wash sinks should not be used for cleaning instruments or disposing of contaminated liquids. Staff should keep nails short and clean and avoid wristwatches, bracelets and inappropriate hand jewellery during clinical care.
Hand hygiene should be performed at appropriate points, including before and after patient contact and before putting on and after removing gloves.
Gloves do not replace hand hygiene. PPE should be selected according to the risk of contamination, aerosols, splashes or sharps injury. Staff undertaking manual instrument cleaning require protection appropriate to that higher-risk activity.
The practice should also have a clear procedure for needlestick or other inoculation injuries, including immediate first aid, risk assessment, escalation and access to occupational health advice.
Clean treatment areas between patients
Environmental cleaning needs to be supported by clear schedules that identify:
what must be cleaned
how it should be cleaned
which product should be used
the required contact time
how frequently cleaning occurs
who is responsible
where completion is recorded
Local work surfaces, dental chairs, light handles, curing lamps, trolleys, delivery units, aspirators, spittoons and relevant X-ray equipment should be cleaned between patients.
Taps, sinks, drainage points and splashbacks should be cleaned after each session. Floors, cupboard doors and other exposed surfaces require routine cleaning at a frequency appropriate to the area and level of risk.
Disposable barrier covers can support infection control, but they do not remove the need to clean the underlying surface.
If an external cleaning contractor is used, the practice remains responsible for ensuring that the contractor is competent, follows the agreed schedules and keeps suitable records.
Manage dental unit waterlines
Dental unit waterlines can develop biofilm if they are not managed correctly.
HTM 01-05 advises that waterlines should be flushed for at least two minutes at the beginning and end of the day and following a significant period of non-use. They should also be flushed for at least 20 to 30 seconds between patients.
Flushing alone does not control established biofilm. Practices should follow the dental unit manufacturer’s instructions and use an appropriate waterline treatment system where required.
For surgical procedures involving irrigation, sterile water or sterile isotonic saline from a separate single-use source should be used.
Dental waterline management should also form part of the practice’s wider water safety and Legionella arrangements.
Audit infection control and act on the findings
CQC expects practices to have an infection control audit programme. The purpose of an audit is not simply to produce a score. It should identify where the practice is performing well, where standards are not being met and what action is required.
A useful audit record should show:
the areas examined
the evidence reviewed
the findings
identified risks or shortfalls
the action required
who is responsible
the target completion date
evidence that the action was completed
whether a follow-up audit is required
CQC refers practices to recognised audit resources, including the Infection Prevention Society’s dental audit tool. The audit frequency should be set through the practice’s programme and risk assessment, with additional reviews following significant changes or concerns.
Repeatedly recording the same unresolved problem is a governance weakness. Managers should monitor action plans and escalate overdue or high-risk actions.
What infection control evidence might CQC review?
During an assessment or inspection, CQC may examine:
the IPC policy and related procedures
details of the IPC lead and deputy arrangements
completed audits and improvement plans
environmental cleaning schedules
decontamination room arrangements
autoclave and washer-disinfector logs
servicing and validation records
staff training and competency assessments
hand hygiene observations or audits
occupational health and immunisation arrangements
sharps and waste procedures
waterline and Legionella records
infection control incidents and resulting learning
evidence that staff understand local procedures
Inspectors may also observe the condition of clinical and decontamination areas and speak directly with staff. Records should therefore reflect what happens in practice rather than being prepared solely for inspection.
Common dental infection control problems
Common weaknesses include:
an outdated or generic IPC policy
unclear responsibility for infection control
poor separation of dirty and clean instruments
decontamination taking place while patients are present
missing autoclave test records
unexplained gaps in equipment logs
equipment used after a failed test
manual-cleaning procedures that do not control temperature or detergent concentration
instruments not inspected before sterilisation
inappropriate storage of sterile instruments
damaged surgery chairs or work surfaces that cannot be cleaned effectively
incomplete environmental cleaning records
staff unable to explain the needlestick procedure
audits completed without evidence of improvement
waterline procedures that rely on flushing alone
The strongest infection control systems are usually simple, practice-specific and consistently followed. A well-written policy is important, but the real evidence lies in clean premises, competent staff, reliable equipment records and prompt action when something goes wrong.
Dental infection control support
Dental practices should review infection prevention and control before an inspection, after changes to their premises or equipment, and whenever audits identify recurring concerns.
As a former CQC inspector, GDC-registered dental nurse and former dental practice manager, I can help dental providers assess their infection control arrangements, identify gaps and prepare practical improvement plans.
My CQC compliance support can include a review of your policies, audits, decontamination records and wider inspection evidence.
This article provides general information for dental services in England. Guidance and regulatory expectations can change, so practices should check the latest CQC and NHS England publications and seek specialist advice where necessary.
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