NDHCE key terms

The legally defined set of duties, procedures, and levels of supervision a licensed dental hygienist may perform in a given jurisdiction, established by state statute and interpreted by the licensing board.

The degree of skill, care, and judgment that a reasonably prudent clinician with similar training would provide under comparable circumstances; used to judge whether professional conduct was appropriate.

A patient's voluntary agreement to treatment after receiving an explanation of the diagnosis, proposed procedures, expected benefits, material risks, alternatives, and the consequences of declining care.

The ethical principle that patients have the right to make their own health care decisions, including the right to refuse recommended treatment, based on complete and honest information.

The principle of respecting a patient's independence and freedom to choose, which obligates clinicians to support patient decisions rather than override them, even when the clinician disagrees.

The ethical obligation to act in ways that promote the patient's welfare, balancing potential benefits against risks and choosing the option most likely to produce good outcomes.

The ethical duty to avoid causing harm, often expressed as primum non nocere, which requires clinicians to weigh whether a procedure's risks outweigh its expected benefit.

The ethical principle requiring fair and equitable treatment of all patients, including fair distribution of care and avoidance of discrimination based on income, race, or other personal characteristics.

The duty to tell the truth and to avoid deception in clinical communication, documentation, and billing, including honest reporting of what care was delivered and by whom.

Acting to protect and promote patient welfare and community oral health, including speaking up for access to care, referring when needs exceed one's scope, and supporting public policy change.

Categories such as direct, indirect, general, and independent supervision that define whether a dentist must be present, examined the patient, or authorized care before and during hygiene services.

A model in which a hygienist provides care under an agreement with a licensed dentist rather than requiring on-site supervision, often used to expand access in underserved settings.

A federal law that protects patients' identifiable health information by setting privacy and security requirements for its use, disclosure, storage, and transmission by covered entities.

Individually identifiable health data, including names, dates, images, and chart entries, that may be shared only for permitted treatment, payment, or operations purposes or with valid authorization.

A characteristic, behavior, or exposure that increases the likelihood of developing a disease, such as tobacco use, uncontrolled diabetes, or poor oral hygiene for periodontal disease.

The conditions in which people are born, grow, live, work, and age, including income, education, housing, and food access, that shape oral health outcomes and access to care.

The absence of avoidable, unfair differences in health status between groups, achieved by removing barriers and allocating resources so all people can reach their full oral health potential.

A structured evaluation of a patient's behaviors, medical history, and exposures used to estimate disease risk and to select tailored preventive, educational, or referral strategies.

A patient-centered counseling style that uses open questions, reflective listening, and affirmation to strengthen a person's own motivation and commitment to change a health behavior.

A behavior-change framework describing stages from precontemplation through contemplation, preparation, action, maintenance, and termination, used to match counseling to a patient's readiness.

A framework explaining health behavior through perceived susceptibility, severity, benefits, barriers, self-efficacy, and cues to action, often used to design patient education messages.

The controlled adjustment of fluoride in a public water supply to a level proven to reduce caries across a population regardless of individual income or behavior.

Measures taken before disease begins to prevent its onset, such as fluoride exposure, sealants, plaque control instruction, and tobacco cessation counseling.

Early detection and treatment of existing disease to halt progression and limit damage, such as caries detection, periodontal therapy, and restorative care for incipient lesions.

Rehabilitation and management of established, irreversible disease to restore function and prevent further complications, such as periodontal maintenance, prosthetics, and implant care.

A rapid screening method using a marked probe to score sextants by probing depth and bleeding, flagging patients who need a comprehensive periodontal evaluation.

Systematic recording of probing depths, recession, attachment loss, bleeding on probing, mobility, furcation involvement, and plaque indices to document periodontal status and track change over time.

The distance from the cementoenamel junction to the base of the sulcus or pocket, reflecting cumulative attachment loss and considered more reliable than probing depth alone.

The measured distance from the gingival margin to the base of the sulcus or pocket, recorded in millimeters at multiple sites per tooth to detect inflammation and attachment loss.

A sign of active gingival inflammation recorded when gentle probing provokes bleeding; its absence at sequential visits suggests periodontal stability and low future risk.

A clinical judgment identifying a patient's actual or potential oral health problems that fall within hygiene scope, forming the basis for selecting interventions and expected outcomes.

A written, individualized sequence of hygiene interventions, patient education, and evaluation dates, with measurable goals and referral needs, derived from assessment and diagnosis data.

Definitive treatment of periodontal infection by mechanical removal of supra- and subgingival deposits and biofilm, including scaling, root planing, and adjunctive antimicrobial or host-modulating therapy.

Ongoing supportive care after active therapy, with interval reassessment, deposit removal, and monitoring of probing depths and bleeding to prevent recurrence of periodontal disease.

Use of a powered scaler tip vibrating at high frequency with water irrigation to remove calculus and biofilm, requiring careful adaptation, power control, and attention to medical contraindications.

An area-specific hand instrument with an offset, curved blade used for subgingival scaling and root planing, each design adapted to a particular tooth surface and pocket depth.

A concentrated topical fluoride preparation painted onto teeth that adheres to enamel and releases fluoride over time, used for caries prevention and remineralization in children and adults.

A multifactorial, biofilm-mediated, sugar-driven disease causing demineralization of tooth hard tissues, assessed by lesion activity rather than by counting cavities alone.

A structured, adherent community of microorganisms embedded in a polysaccharide matrix on tooth and mucosal surfaces, whose metabolic activity drives caries and periodontal inflammation.

A chronic inflammatory condition initiated by bacterial biofilm in which host immune response destroys gingival tissue, periodontal ligament, and alveolar bone, potentially causing tooth loss.

The outermost, highly mineralized, avascular hard tissue of the crown, composed mainly of hydroxyapatite crystals and unable to regenerate once fully destroyed by caries or wear.

The mineralized tissue beneath enamel and cementum that forms most of the tooth, containing fluid-filled tubules connected to the pulp and capable of tertiary formation in response to irritation.

Inflammation of the dental pulp, often caused by caries, trauma, or restorative procedures, producing symptoms ranging from sharp provoked pain to spontaneous, lingering, or referred discomfort.

Infection control practices applied to all patients regardless of diagnosis, including hand hygiene, gloves, gowns, masks, eye protection, and safe handling of sharps and contaminated items.

Barrier items such as gloves, masks, protective eyewear, and gowns worn to prevent exposure to bloodborne pathogens and to protect patients from contamination during care.

A validated process that destroys all microbial life, including bacterial spores, on reusable instruments, typically by steam autoclave, unsaturated chemical vapor, or dry heat.

An item that contacts mucous membranes or nonintact skin but not sterile tissue, requiring at minimum high-level disinfection or sterilization between patients per current guidelines.

Airborne particles under a set size, generated by ultrasonic scalers, air polishing, and handpieces, that can carry microorganisms and require high-volume evacuation and respiratory protection.

The proportion of a population that has a condition at a specified point or period in time, useful for describing disease burden and planning services.

The number of new cases of a condition arising in a defined population during a specified period, reflecting the rate at which disease develops.

Systematic, ongoing collection, analysis, and dissemination of oral health data, such as screening surveys and sealant or fluoridation statistics, to guide public health programs.

A school- or clinic-based public health intervention applying pit-and-fissure sealants to at-risk teeth, often paired with screening, referral, and fluoride to reduce caries in populations.