Dental Hygiene: Infection Control, Periodontal Anatomy, Assessment, Classification, and EBDM

Comprehensive vocabulary flashcards covering infection control guidelines, decontamination and sterilization, oral and periodontal anatomy, clinical indices, periodontal disease staging/grading, and evidence-based decision making.

Centers for Disease Control and Prevention (CDC)

An organization that creates infection prevention recommendations and guidelines.

Food and Drug Administration (FDA)

An agency that regulates medical devices for safety and effectiveness.

Occupational Safety and Health Administration (OSHA)

A regulatory body that protects employees from workplace hazards and enforces workplace safety requirements.

Environmental Protection Agency (EPA)

An agency that registers environmental disinfectants and regulates their claims.

National Institute for Occupational Safety and Health (NIOSH)

An agency that researches occupational safety and makes recommendations without enforcing regulations.

Standard Precautions

A current, broader infection prevention approach applied to all patients regardless of known infection status, covering blood, saliva, mucous membranes, nonintact skin, and other potentially infectious materials.

Universal Precautions

An earlier infection control approach historically associated with the HIV epidemic, originally focused on blood and certain body fluids to prevent bloodborne pathogen transmission.

Chain of Infection

A six-link model of disease transmission consisting of: 1. Infectious agent, 2. Reservoir, 3. Portal of exit, 4. Mode of transmission, 5. Portal of entry, and 6. Susceptible host.

Hepatitis B Virus (HBV)

A bloodborne pathogen that can survive on environmental surfaces for at least $7$ days under suitable conditions and is preventable via vaccination.

One-Handed Scoop Technique

A recommended safety technique used to recap contaminated needles without using two hands to prevent needlestick injury.

Cleaning

The physical removal of debris, organic material, and contamination that must occur before disinfection or sterilization.

Disinfection

A process that destroys many or most pathogenic microorganisms, depending on the level, but does not necessarily destroy bacterial spores.

Sterilization

A process that destroys all forms of microbial life, including bacterial spores.

Critical Instruments

Instruments that penetrate soft tissue or bone (such as surgical instruments and scalers) and require heat sterilization.

Semicritical Instruments

Instruments that contact mucous membranes or nonintact skin without penetrating tissue (such as mouth mirrors and reusable handpieces) and require heat sterilization when heat-tolerant.

Noncritical Items

Items that contact intact skin only (such as blood pressure cuffs) and require cleaning and appropriate disinfection.

Biological Indicators (Spore Tests)

Direct tests of the sterilization process using resistant bacterial spores that provide the strongest routine evidence of sterilization effectiveness, recommended at least weekly.

Dental Unit Water Quality Standard

The EPA drinking-water standard of $\text{CFU/mL} \times 10^0 \text{ or less}$: $\le 500\,\text{CFU/mL}$ of heterotrophic bacteria for routine nonsurgical dental treatment.

Periodontium

The tissues that surround, anchor, and support the teeth, consisting of gingiva, cementum, periodontal ligament (PDL), and alveolar bone.

Masticatory Mucosa

Oral mucosa covering the gingiva and hard palate that is primarily keratinized to withstand chewing forces.

Lining Mucosa

Oral mucosa covering the lips, cheeks, floor of the mouth, and ventral tongue that is generally nonkeratinized and movable.

Specialized Mucosa

Oral mucosa located on the dorsal surface of the tongue that contains specialized papillae and taste structures.

Gingival Sulcus

The space between the tooth and free gingiva, bordered by the tooth surface, sulcular epithelium, and junctional epithelium, typically measuring $0.5\text{ to }3\,\text{mm}$ in health.

Junctional Epithelium (JE)

The specialized epithelium that forms the epithelial attachment between the gingival tissue and the tooth surface.

Gingival Crevicular Fluid (GCF)

Fluid present within the gingival sulcus that generally increases in volume in the presence of inflammation.

Mucogingival Junction (MGJ)

The scalloped anatomical boundary separating the firm, keratinized attached gingiva from the loose, nonkeratinized, redder alveolar mucosa.

Gingival Col

A saddle-like, typically nonkeratinized interdental depression located directly beneath the contact area of adjacent teeth that is highly susceptible to plaque accumulation.

Cellular Cementum

Mineralized root tissue located predominantly in apical root regions that contains cementocytes and plays an important role in adaptation and repair.

Acellular Cementum

Mineralized root tissue located primarily in cervical root regions that lacks cementocytes and is essential for tooth attachment.

Sharpey's Fibers

The terminal ends of principal periodontal ligament collagen fiber bundles that are embedded into cementum and alveolar bone.

Dental Biofilm

A structured community of microorganisms attached to a surface and enclosed within a protective self-produced extracellular matrix.

Dental Calculus

Mineralized dental biofilm composed of approximately $75\%$ inorganic mineral salts and $25\%$ organic material and water.

Subgingival Calculus

Mineralized deposits located apical to the gingival margin, deriving minerals primarily from gingival crevicular fluid, and often appearing dark brown or greenish-black.

Sessile

A descriptor for a lesion attachment characterized by a broad, flat base.

Pedunculated

A descriptor for a lesion attachment characterized by a narrow, stalk-like stem.

Leukoplakia

A white patch or plaque on the oral mucosa that cannot be clinically or pathologically characterized as any other disease, representing a potentially malignant disorder.

Erythroplakia

A smooth or granular red lesion of the oral mucosa that cannot be attributed to another condition and carries a high risk of dysplasia or malignancy.

Clinical Attachment Level (CAL)

The distance from the cementoenamel junction (CEJ) to the base of the periodontal pocket, calculated as: $\text{CAL} = \text{probing depth} + (\text{signed FGM-to-CEJ measurement})$.

Width of Attached Gingiva

The distance from the external gingival margin to the mucogingival junction minus the probing depth: $\text{Width} = \text{FGM-to-MGJ} - \text{probing depth}$.

Ramfjord Teeth

Six specific index teeth used in the Silness and Löe plaque index: teeth numbers $3$, $9$, $12$, $19$, $25$, and $28$.

Periodontitis Case Definition

Interdental CAL detectable at $\ge 2$ nonadjacent teeth, OR buccal/oral CAL of $\ge 3\,\text{mm}$ with pocketing $> 3\,\text{mm}$ at $\ge 2$ teeth, not attributable to non-periodontal causes.

Periodontal Staging

A classification parameter that characterizes the severity of tissue destruction and the complexity of case management (ranging from Stage I: Initial to Stage IV: Advanced).

Periodontal Grading

A classification parameter that describes the rate of disease progression, responsiveness to therapy, and potential systemic health risks (Grade A: Slow, Grade B: Moderate, Grade C: Rapid).

Evidence-Based Decision Making (EBDM)

An approach to oral health care that integrates the best available scientific research with clinical expertise and patient values, preferences, and circumstances.

PICO Framework

A mnemonic structure for formulating focused clinical research questions: P = Patient/Population/Problem, I = Intervention, C = Comparison, O = Outcome.

Meta-Analysis

A secondary research methodology that statistically pools and combines quantitative findings from multiple compatible individual studies.