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Ch 23 L.O.
| Question | Answer |
|---|---|
| Discuss the primary routes of chemical exposure in the dental office. | The primary routes of chemical exposure are inhalation (breathing in gases, vapors, or dust), skin contact (direct absorption through skin or soft tissues), and ingestion (swallowing chemicals via contaminated hands, food, or drink). |
| Differentiate between acute and chronic chemical toxicity. | Acute chemical toxicity results from high levels of exposure over a short period (causing immediate symptoms like dizziness or nausea), whereas chronic toxicity results from repeated, long-term exposure to lower doses (causing severe health effects over t |
| Describe personal protective equipment (PPE) required when handling chemicals. | Required PPE includes utility gloves made of chemical-resistant material (nitrile or neoprene), fluid-resistant protective clothing/aprons, full-face shields or splash-resistant eyewear, and fluid-repellent masks. |
| Describe the basic requirements for eyewash stations. | Eyewash stations must be installed in areas where chemicals are used, inspected regularly (every 3 months), and capable of irrigating both eyes simultaneously with a soft, continuous flow of low-pressure water for at least 15 minutes. |
| Describe general rules for the storage of chemicals. | Chemicals should be stored in a cool, dry, dark area away from direct sunlight, kept in original or properly labeled containers, separated by chemical compatibility (e.g., keeping acids away from bases), and stored according to manufacturer instructions. |
| Describe the purpose of the OSHA Hazard Communication Standard. | Also known as the "Right-to-Know Law," OSHA's Hazard Communication Standard requires employers to inform employees about the hazards of chemicals present in the workplace and train them on safe handling procedures. |
| Explain the purpose and structure of a Safety Data Sheet (SDS). | An SDS provides comprehensive information about a chemical's physical and health hazards, safe handling, storage, emergency first aid, and spill responses; it uses a standardized 16-section format established by the Globally Harmonized System (GHS). |
| Describe the components of a written hazard communication program. | A written program must include an office chemical inventory list, staff training records, location of SDS binders, detailed labeling systems used in the practice, and emergency response protocols for chemical spills or accidents. |
| regulated waste | Regulated waste (infectious/hazardous) includes items capable of transmitting disease or causing harm, such as sharps, blood-soaked materials, and chemical waste. |
| Describe proper disposal methods for hazardous waste in the dental office. | Disposal requires specialized handling: sharps go into rigid puncture-resistant containers; scrap amalgam and mercury are collected in designated airtight recycling containers; |
| Explain employee training requirements under the Hazard Communication Standard. | Training must be provided upon initial employment, whenever a new chemical hazard is introduced into the workplace, and reviewed annually. Detailed training records must be retained by the dental office for at least 5 years. |
| Why dental assistants must be well informed about workplace chemical exposure | Dental assistants work daily with hazardous chemicals (disinfectants, impression materials, acrylics, resin monomers); understanding exposures prevents acute injuries (burns, eye damage) and chronic health conditions. |
| Dental assistant duties that could result in chemical exposure | Pouring and mixing acrylics/gypsum, preparing disinfectants, processing radiographs, handling scrap amalgam, etching/bonding teeth, and cleaning up chemical spills. |
| How chemicals enter the human body | Chemicals enter via inhalation (breathing fumes/gases), skin/eye contact (absorption through skin or mucosa), and ingestion (swallowing chemicals via unwashed hands or contaminated food/drink). |
| Difference between chronic and acute chemical exposure (long-term vs short-term) | Acute exposure involves high chemical levels over a short period causing rapid effects (dizziness, burning skin); chronic exposure involves repeated lower-dose contact over months/years causing cumulative damage (liver disease, cancer). |
| Personal protection methods against chemical exposure | Wear chemical-resistant utility gloves (nitrile/neoprene), protective eyewear or face shield, fluid-resistant gowns/aprons, and fluid-repellent masks; work in well-ventilated areas. |
| Necessary precautions when working with mercury | Store scrap amalgam in designated airtight recycling containers, avoid heating amalgam, use a dedicated mercury spill kit for cleanups, and avoid touching amalgam directly with bare hands. |
| Methods to minimize chemical exposure in the dental office | Maintain good ventilation, keep chemical containers tightly sealed when not in use, strictly wear proper PPE, follow manufacturer instructions, and avoid eating or drinking in treatment areas. |
| General rules for chemical storage | Store in a cool, dry, dark area away from heat and direct sunlight; keep chemicals in original containers; separate incompatible materials (e.g., acids and flammables); check expiration dates regularly. |
| Why the OSHA Hazard Communication Standard was revised | It was revised to align with the Globally Harmonized System (GHS) to establish international standardization for chemical hazard classification, labeling elements, and SDS formatting. |
| Nine Hazard Communication Standard (HCS) pictograms | Health Hazard, Flame, Exclamation Mark, Gas Cylinder, Corrosion, Exploding Bomb, Flame Over Circle, Environment (non-mandatory), and Skull and Crossbones. |
| Record-keeping requirements of the Hazard Communication Standard | The written hazard program, chemical inventory, and SDS binder must be readily accessible to all staff; employee training records must be retained for at least 5 years. |
| Purpose of a Safety Data Sheet (SDS) | An SDS details comprehensive safety information for a chemical, including physical properties, health hazards, safe handling/storage, required PPE, spill cleanup, and emergency first aid. |
| Date by which employers had to train employees on GHS label elements and SDSs | December 1, 2013 (OSHA required training on the new GHS label elements and 16-section SDS format by this deadline). |
| How to create a label for a secondary container | When transferring a chemical from its original container to a secondary container, the label must include the product name/identifier, signal word, hazard statements, precautionary statements, and applicable GHS pictograms. |
| Three classifications of dental waste | Regulated waste (infectious/hazardous), Nonregulated waste (general office trash), and Hazardous/Toxic chemical waste. |
| Types of regulated waste generated in a dental office | Sharps (needles, burs, scalpel blades), blood-soaked or saliva-saturated items, human tissue, and pathologic waste. |
| Types of toxic waste generated in a dental office | Scrap amalgam/mercury, lead foil from x-ray packets, photochemicals (used fixer and developer solutions), and chemical disinfectants. |
| Precautions to take with photochemical waste | Fixer solution contains silver and must be passed through a silver recovery system or disposed of as hazardous waste (never poured down the drain); developer with high pH must be neutralized per local regulations. |
| Responsibilities of the dentist regarding waste disposal | The dentist is legally responsible ("cradle-to-grave") for proper waste classification, safe storage, and ensuring licensed haulers handle waste disposal, holding liability even after waste leaves the office. |
| nonregulated dental waste. | Nonregulated waste includes general office trash like paper towels, patient bibs, and surface barriers. |
| How should lead foil (hazardous waste) be handled | lead foil and radiographic chemicals (fixer/developer) are recycled or collected by licensed hazardous waste haulers. |
Created by:
Cocoalover