Health and Safety Legislation

Introduction to Health and Safety Legislation

Dental practices are complex environments with multiple potential hazards. To protect staff, patients, and the public, strict adherence to health and safety legislation is mandatory. In the UK, the overarching legislation is the Health and Safety at Work etc. Act 1974, which places a duty of care on both employers and employees to maintain a safe working environment. Under this act, several specific regulations apply directly to dental practice.

Control of Substances Hazardous to Health (COSHH)

The Control of Substances Hazardous to Health (COSHH) regulations require employers to control exposure to hazardous substances to prevent ill health. In dentistry, hazardous substances are ubiquitous and include materials like amalgam, etching acid, disinfectants, impression materials, and even biological hazards like blood and saliva.

COSHH Risk Assessments

For every hazardous substance used, a COSHH risk assessment must be documented. This assessment must:

• Identify the hazards associated with the substance (e.g., toxic, corrosive, irritant).
• Determine who might be harmed and how (e.g., skin contact, inhalation).
• Evaluate the risks and implement control measures to mitigate them.
• Record the findings and review the assessment regularly.

Control measures follow a hierarchy: the ideal solution is to eliminate the hazard completely. If not possible, substitution with a safer alternative is preferred. If substitution is impossible, engineering controls (like local exhaust ventilation) and administrative controls (like safe working protocols) are applied. Personal Protective Equipment (PPE) is always considered the last resort.

Reporting of Injuries, Diseases and Dangerous Occurrences Regulations (RIDDOR)

RIDDOR places a legal duty on employers, the self-employed, and people in control of work premises to report and keep records of certain serious workplace accidents, occupational diseases, and specified dangerous occurrences (near misses).

Reportable Incidents under RIDDOR

In a dental setting, incidents that must be reported to the Health and Safety Executive (HSE) under RIDDOR include:

• Specified injuries: Such as fractures (other than to fingers, thumbs, and toes), amputations, or injuries causing permanent loss of sight.
• Over-seven-day incapacitation: Accidents that result in an employee being away from work, or unable to perform their normal duties, for more than seven consecutive days.
• Occupational diseases: Such as occupational dermatitis or asthma linked to specific workplace exposures (e.g., latex allergy), or blood-borne viruses contracted through a sharps injury at work.
• Dangerous occurrences: Specific near-miss events, such as the explosion or collapse of a pressure vessel (like an autoclave).

Personal Protective Equipment (PPE)

Personal Protective Equipment (PPE) is essential for protecting dental staff from biological, chemical, and physical hazards during clinical procedures and decontamination processes. Under the Personal Protective Equipment at Work Regulations, employers must provide adequate and suitable PPE free of charge to employees.

Types of PPE in Dentistry

Standard PPE for clinical procedures includes:

• Gloves: To protect hands from contamination. They must be single-use and changed between patients.
• Aprons/Gowns: Single-use disposable aprons protect clothing from splashes and spray. Fluid-resistant gowns may be required for surgical procedures.
• Eye Protection: Visors or safety glasses protect the eyes from bodily fluids, debris, and chemical splashes. They must provide side protection.
• Masks: Fluid-resistant surgical masks protect the mucous membranes of the nose and mouth from droplet spatter. For aerosol-generating procedures (AGPs) involving infectious agents, FFP2 or FFP3 respirators may be required, subject to face-fit testing.
• Footwear: Enclosed, sturdy footwear is required to protect against dropped sharps and chemical spills.

PPE must be donned and doffed in the correct sequence to prevent cross-contamination and must not be worn outside the clinical or decontamination areas.

Waste Segregation and Disposal

The safe management of healthcare waste is heavily regulated. The primary aim is to ensure that waste is handled, stored, transported, and disposed of safely, without harming human health or the environment. The Safe Management of Healthcare Waste guidance dictates a strict color-coded segregation system.

Color-Coded Waste Streams

• Orange Stream: Used for infectious clinical waste that can be treated (e.g., by autoclaving or microwaving) before disposal. This includes items contaminated with blood or saliva from known or suspected infectious patients.
• Yellow Stream: Used for highly infectious clinical waste that must be disposed of by incineration. This includes waste from patients with high-consequence infectious diseases, and often anatomical waste.
• Yellow with Black Stripe (Tiger Stripe): Used for offensive/hygiene waste. This waste is non-infectious but may cause offense to those coming into contact with it (e.g., heavily soiled sanitary wear). It does not require specialist treatment but must be disposed of in a deep landfill.
• Black Stream: General domestic waste, similar to household rubbish, which is not contaminated and not recyclable. This goes to landfill or municipal incineration.
• Purple Stream: Cytotoxic and cytostatic waste (e.g., some medications), which requires incineration at specific temperatures.
• Red Stream: Anatomical waste (e.g., extracted teeth without amalgam), destined for incineration.

Specific containers are also required. Sharps must be disposed of in rigid, puncture-resistant sharps bins. Amalgam waste, which is hazardous to the environment, must be disposed of in special amalgam waste pots containing a mercury vapor suppressant and collected by a registered waste carrier.