DANB COA key terms

A small attachment bonded to a tooth that holds the archwire and transmits orthodontic force to the tooth. Brackets may be metal, ceramic, or self-ligating and are placed at precise heights for predictable movement.

The wire seated in bracket slots that guides teeth into alignment and controls arch form. Its size, alloy, and cross-section determine the amount and type of force delivered.

The act of securing an archwire into bracket slots, either with elastomeric modules or with metal ligature ties. Proper ligation keeps the wire engaged so planned forces are expressed.

A small elastomeric ring stretched around bracket tie wings to hold the archwire in the slot. Modules lose force over time and stain, so they are typically replaced at adjustment visits.

A continuous strip of connected elastic links used to close spaces or consolidate teeth. It delivers light continuous force and must be changed regularly because its force decays.

A small elastic ring or metal spring placed between adjacent teeth to create space before banding. Patients are warned of temporary pressure and chewing tenderness while separators are in place.

A metal ring cemented around a molar or premolar that anchors appliances such as headgear tubes or lingual attachments. Band fit is checked before cementation, and margins must be sealed to prevent leakage.

A hollow attachment welded to a band or bonded directly to a molar that receives the archwire and auxiliary appliances. Its convertible slot can be opened to accept a facebow or headgear.

The process of attaching brackets directly to enamel using an adhesive system after etching and priming. Moisture control during bonding is critical because contamination weakens the bond.

Application of phosphoric acid gel to enamel to create microporosity for adhesive penetration. The etched surface looks frosty white and must be kept dry and uncontaminated before bonding.

A low-viscosity resin applied to etched enamel or to the bracket base to promote adhesion. Primer must be thin and evenly applied; pooling or contamination reduces bond strength.

Techniques such as cheek retractors, cotton rolls, saliva ejectors, and dry-field isolation that keep the working field dry. Adequate isolation is essential for bonding, sealants, and cementation to succeed.

Removal of brackets and residual adhesive at the end of treatment. The assistant supports the tooth, manages suction, and prepares polishing and fluoride materials while protecting soft tissue.

A standardized lateral skull radiograph used to assess skeletal and dental relationships for diagnosis and treatment planning. The head is positioned in a cephalostat so measurements remain reproducible across time.

A single image showing both jaws, teeth, and surrounding structures. It is used to screen for impacted teeth, pathology, and root angulation before and during orthodontic treatment.

The head-positioning device on a cephalometric unit that aligns the patient's head with ear rods and a nasal positioner. Consistent placement is what makes serial cephalometric comparisons valid.

A line drawing made over a radiograph to identify landmarks and measure angles and distances. It supports growth assessment and treatment planning and is kept in the patient record.

A tooth that cannot erupt into its normal position, commonly a third molar or canine. Orthodontic planning often requires radiographic localization and may involve surgical exposure or extraction.

Removal of a tooth, often a premolar, to relieve crowding or correct arch relationships. The assistant prepares instruments and suction, reviews post-operative instructions, and supports hemostasis.

Control of bleeding after procedures such as extraction or gingival irritation. Pressure with gauze, careful suction, and post-operative instructions help prevent prolonged bleeding.

A chairside method in which the assistant and operator work together with coordinated instrument transfer and suction. It reduces treatment time, improves visibility, and limits operator fatigue.

The coordinated handoff of instruments between operator and assistant within a defined transfer zone. Smooth transfer keeps the field visible and reduces the risk of injury or contamination.

The area near the patient's chin where instruments are exchanged safely outside the field of vision. Consistent use of this zone prevents dropped instruments and accidental injury.

Infection control practices applied to all patients regardless of known status, including hand hygiene, gloves, and barriers. They assume every body fluid may be infectious and guide routine chairside behavior.

Barriers such as gloves, masks, eye protection, and gowns worn to prevent exposure to blood and saliva. PPE is removed carefully to avoid self-contamination and is changed between patients.

Cleaning hands with soap and water or an alcohol-based rub at defined moments during patient care. It is the single most effective measure for preventing transmission of microorganisms.

Cleaning and applying an EPA-registered disinfectant to clinical contact surfaces between patients. Surfaces are first cleaned of visible debris because organic matter interferes with disinfectant action.

Covering frequently touched surfaces with disposable plastic film that is removed and replaced between patients. Barriers reduce handling of contaminated surfaces and speed room turnover.

A process that destroys all microorganisms, including bacterial spores, on reusable instruments. Orthodontic pliers and handpieces require appropriate cycles and monitoring before reuse.

A device that sterilizes instruments using pressurized steam at elevated temperature. Instruments must be cleaned, dried, and properly packaged before the cycle to be effective.

Testing a sterilizer with spores to verify that it actually kills microorganisms. Results are logged and failures trigger investigation and retesting before instruments are used.

A concentrated topical fluoride coating applied to teeth to reduce caries risk, often after debonding or in patients with poor hygiene. It is painted on dried enamel and sets on contact with saliva.

A chalky demineralized area on enamel, common around brackets when plaque is not removed. Prevention relies on hygiene instruction, fluoride, and frequent professional cleaning.

Teaching patients to brush around brackets, floss under wires, and use adjuncts such as interdental brushes. Instruction is tailored to the appliance and reinforced at each visit.

The degree to which a patient follows appliance, elastic, and hygiene instructions. Poor compliance lengthens treatment and is documented objectively in the chart.

The process of explaining a procedure's benefits, risks, and alternatives so the patient can decide voluntarily. The discussion is documented and signed before treatment begins.

The complete chart containing history, radiographs, photographs, notes, and consent forms. Entries must be accurate, dated, and legible, because the record is a legal document.

U.S. law governing privacy and security of protected health information. Staff must limit disclosure, secure records, and follow office policies for authorized release.