10. Ergonomic standards for planning of dental surgery.

Ergonomic Standards for Planning of Dental Surgery

Ergonomics & Dental Office

• Ergonomics = science of adapting the working environment, equipment and procedures to human physical and psychological needs.
• Aim – improve efficiency, comfort, safety and productivity while reducing fatigue and occupational injuries.
• In dentistry, ergonomics creates optimal working conditions for both the dental team and the patient.
• Dental office = functional complex of facilities, equipment and devices designed to provide oral healthcare.
• Planning follows the principle of humanisation of the environment – and should satisfy the physiological and psychological needs of patients and staff.

Exposure & Natural Light

• Preferred orientation – North, North-East or North-West
• Natural light should remain stable throughout the day.
• Sunlight should not reflect into dentist’s or patient’s eyes.
• Good exposure improves visibility,comfort and working conditions.

Area & Cubage

• Minimum dental office area ≈ 12 m²
• Each additional workplace requires approximately +10 m².
• Space must allow safe movement of dentist, assistant and patient.
• Adequate room volume is necessary for four-handed dentistry.

Air, Temperature & Noise

• Temperature ≈ 18–22°C
• Acceptable noise level ≈ 60–70 dB
• Good ventilation reduces aerosols, odours and contamination.
• Compressors and noisy equipment should be isolated where possible.

Water, Air & Electrical Supply

• Installations must correspond to dental unit requirements
• Pipes should follow the shortest practical route.
• Minimum covering above pipes ≈ 10 cm.
• Drainage pipes should allow efficient waste removal.
• Systems should permit easy maintenance and repair.

Movement Flow & Sinks

• Ideally two sinks – one for dentist, one for assistant.
• Layout should avoid crossing work pathways.
• Clean and contaminated instrument routes should remain separate.
• Reduces contamination risk and improves efficiency.

Lighting Standards

• General lighting + local operating lighting
• Local : General lighting ratio = 5–10 : 1.
• General illumination ≈ 3000 lux.
• Operating field illumination ≈ 12,000–24,000 lux.
• Poor lighting causes eye strain and fatigue.

Floors, Walls & Colours

• Surfaces must tolerate frequent cleaning and disinfection
• Floors should not contain gaps where debris accumulates.
• Washable wall covering recommended up to 1.8 m.
• Light pastel colours preferred; improve comfort and reduce stress.
• Waiting rooms may use brighter colours and decorative elements.

Links to Other Premises

• Waiting room ≈ 9 m²
• Toilet ≈ 3 m²
• Number of waiting-room chairs ≈ 3× number of workplaces.
• Patient pathway should be short and simple.
• Doors should reduce noise transmission.

Equipment Layout

• Working room divided into dentist zone and assistant zone
• Chair positioned centrally between both zones.