Hygienist Licensing Examination key terms

The distance in millimeters from the gingival margin to the base of the sulcus or periodontal pocket, measured with a calibrated probe at six sites per tooth to document attachment loss.

The distance from the cementoenamel junction to the base of the pocket, calculated from probing depth and gingival margin position; it reflects cumulative periodontal destruction and is more stable than probing depth alone.

A sign of active gingival inflammation recorded when gentle probing provokes bleeding within about 15 seconds; its absence is a reliable indicator of periodontal stability at a site.

Apical displacement of the gingival margin beyond the cementoenamel junction, exposing root surface; recorded in millimeters and used to compute clinical attachment level.

A condition in which the keratinized tissue or attached gingiva is insufficient, or the frenum pulls on the marginal tissue, risking further recession and complicating brushing and restorative margins.

Classification of tooth movement within the alveolus, usually on a 0 to 3 scale, assessed with two instrument handles; increased mobility suggests reduced supporting bone or occlusal trauma.

Loss of periodontal support into the bifurcation or trifurcation of a multirooted tooth, graded I to IV by probe penetration; it alters prognosis and instrumentation access.

A structured appraisal combining probing depths, bleeding, attachment loss, systemic factors such as diabetes and smoking, and age to estimate a patient's likelihood of disease progression and set recall intervals.

A health condition or behavior, such as uncontrolled diabetes, tobacco use, or pregnancy, that modifies the host response and increases susceptibility to or severity of periodontal disease.

A statement identifying the human need or problem that dental hygiene care can address, derived from assessment data and stated in terms of the patient's actual or potential deficit.

A framework organizing patient problems into needs such as protection from health risks, freedom from fear, and wholesome facial image; used to link assessment findings to dental hygiene diagnoses and interventions.

A written, sequenced set of interventions with goals, expected outcomes, and evaluation dates, based on the dental hygiene diagnosis and revised as the patient's status changes.

Voluntary agreement to treatment after the patient receives and understands the diagnosis, proposed care, alternatives, and material risks; it must be documented and may be withdrawn at any time.

The legally defined set of duties a licensed dental hygienist may perform, including supervision level required, which varies by jurisdiction and changes with continuing education and legislative updates.

A practice level in which the dentist is physically present in the office and evaluates the patient before and after hygiene services; the specific requirements are set by state law.

A practice level in which the dentist has authorized care but is not required to be physically present while it is delivered; authorization and patient selection rules are defined by statute.

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 contact with blood, saliva, and aerosols; removed before leaving the treatment area and never worn outside it.

A written employer program required under occupational safety rules that describes how exposures are prevented, how incidents are reported, and how exposed workers receive evaluation and follow-up.

Medical evaluation and, when indicated, medication or vaccination given after occupational contact with blood or body fluids to reduce the risk of transmitting bloodborne pathogens.

A microorganism transmitted through contact with infected blood or body fluids, notably hepatitis B, hepatitis C, and human immunodeficiency virus; prevention relies on barriers and sharps safety.

Airborne particles generated by ultrasonic scalers, air polishing, and handpieces that may carry microorganisms; controlled with high-volume evacuation, preprocedural rinses, and barriers.

Verification that instruments were sterilized, documented through biological indicators, chemical indicators, and physical monitoring of each load, with results retained per regulation.

An item that contacts mucous membranes or nonintact skin but does not penetrate tissue, such as a mouth mirror; it requires cleaning followed by high-level disinfection or sterilization.

A structured evaluation of factors such as diet, fluoride exposure, saliva flow, bacterial load, and past caries experience to predict future decay and tailor preventive therapy.

A clinical protocol that assigns patients a low, moderate, or high caries risk and matches recall frequency, fluoride, antibacterial, and restorative decisions to that level.

A concentrated topical fluoride resin applied to teeth to prevent caries and treat hypersensitivity; it sets on contact with saliva and is safe for young children.

A collaborative conversation style that elicits a patient's own reasons for change through open questions, reflective listening, and affirmation, rather than advice-giving or confrontation.

A behavior change framework describing stages from precontemplation through maintenance; interventions are matched to the patient's current stage to avoid resistance and relapse.

A patient's capacity to obtain, process, and understand basic health information to make decisions; low literacy calls for plain language, teach-back, and visual aids.

A standardized numerical scale used to quantify a condition such as plaque, gingivitis, or fluorosis, allowing comparison between individuals and across time or populations.

A count of decayed, missing, and filled permanent teeth per person, used to summarize caries experience in a population; the primary dentition version is dmft.

Adjustment of fluoride in a public water supply to an optimal concentration for caries prevention; it is population-wide, cost-saving, and monitored for safety and effectiveness.

Clinical decisions that integrate the best available research, clinician expertise, and patient values and preferences; it requires appraising study design and applicability.

The anatomic line where enamel ends and cementum begins at the cervical region of a tooth; it is the reference point for measuring clinical attachment level and recession.

Fibrous tissue connecting cementum to alveolar bone, absorbing occlusal forces and providing proprioception; its width and health determine tooth mobility and response to trauma.

A structured community of microorganisms embedded in a polysaccharide matrix on tooth and mucosal surfaces; its maturation drives gingivitis and, in susceptible hosts, periodontitis.

Definitive debridement of root surfaces to remove biofilm and calculus and smooth the surface, typically performed with local anesthesia in patients with periodontal pockets.

In-office application of high-concentration fluoride, such as varnish or gel, delivered after assessment of caries risk to remineralize enamel and inhibit demineralization.

The legally mandated period for keeping patient records, radiographs, and consent documents; requirements differ by jurisdiction and records must be released per valid authorization.