CDA key terms

A teamwork method in which the chairside assistant and dentist work together using coordinated, predetermined motions so procedures are completed efficiently with less fatigue and fewer unnecessary movements.

The specific area near the patient's chin where instruments are passed between the dentist and assistant, kept consistent so either person can give or receive items without looking away from the field.

A large-bore suction tip connected to the dental unit that removes large volumes of saliva, water, and debris from the mouth during treatment; it also helps retract tissue and keeps the working field visible.

A small, low-volume suction tube placed in the floor of the mouth to keep pooled saliva and fluids away from the treatment area; it removes far less volume than a high-volume evacuator.

A handheld dental unit attachment that delivers a stream of air, water, or a combined spray for rinsing, drying, and cleaning tooth surfaces and instruments during chairside procedures.

A way of holding a dental instrument with the thumb, index, and middle fingers similar to holding a pen, allowing controlled, precise movements while the ring and little fingers rest for support.

A finger rest, usually on adjacent teeth or tissue, that stabilizes the hand and instrument during intraoral work so the operator has control and leverage.

A thin latex or nonlatex sheet stretched over a frame and clamped to isolate one or more teeth, keeping the field dry and clean and protecting the patient from swallowing debris or small instruments.

A metal ring placed on a tooth to hold the rubber dam in place; it is seated with forceps and must be secured with floss to prevent aspiration if it slips.

A thin metal or plastic strip held by a retainer around a prepared tooth to form a temporary wall so restorative material can be packed and shaped before it sets.

A small wooden or plastic triangle inserted between teeth to hold a matrix band tightly against the gingival margin, separate teeth slightly, and protect the adjacent tissue.

Thin paper coated with dye that is placed between upper and lower teeth so the patient can bite down, leaving marks that show where contacts need adjustment.

A handheld device that emits a specific wavelength of blue light to harden light-cured restorative materials such as composite resin and some cements and sealants.

The principle of keeping radiation exposure as low as reasonably achievable while still obtaining the diagnostic information needed, achieved through proper technique, equipment, and shielding.

Kilovoltage peak is the maximum voltage applied across the x-ray tube; it controls the penetrating power and speed of the x-ray beam and affects image contrast.

Milliamperage is the current through the x-ray tube that determines the number of x-rays produced per unit of time and therefore the overall density or darkness of the image.

The length of time the x-ray tube is energized during an exposure; together with mA it determines the total quantity of radiation reaching the receptor.

A metal tube or diaphragm in the x-ray head that limits the beam to a specific size, reducing the area of patient tissue exposed and improving image quality by cutting scatter.

The position indicator device is the open-ended cone or tube on the x-ray head that aims the beam at the receptor and helps maintain the correct target-to-skin distance.

Protective shielding worn by the patient during exposure to absorb scattered radiation and reduce dose to the trunk, reproductive organs, and thyroid gland.

A rating of how much exposure a radiographic film requires to produce a useful image; faster films need less radiation, so higher-speed film reduces patient dose.

An electronic receptor placed in the mouth that captures x-rays and sends the image directly to a computer, usually requiring less radiation than film and allowing immediate viewing.

An intraoral method in which the receptor is placed parallel to the long axis of the tooth and the beam is directed perpendicular to both, producing accurate images with less distortion.

An intraoral method used when the receptor cannot be placed parallel to the tooth; the beam is aimed perpendicular to an imaginary line bisecting the angle between tooth and receptor.

An intraoral image showing the crowns of upper and lower teeth together with the crest of alveolar bone, used mainly to detect interproximal caries and bone loss.

Describes a structure that appears dark on a radiograph because it allows more x-rays to pass through, such as air, soft tissue, or an untreated cavity.

Describes a structure that appears light or white on a radiograph because it absorbs more x-rays, such as metal, enamel, or bone.

The sequence of conditions needed for an infection to spread: a pathogen, a reservoir, a way out, a mode of transmission, a way in, and a susceptible host; breaking any link prevents transmission.

Infection-control practices applied to all patients regardless of known diagnosis, including hand hygiene, gloves, and other barriers when contact with blood or body fluids is possible.

Personal protective equipment such as gloves, masks, eye protection, and gowns worn to prevent contact with blood, saliva, and other potentially infectious material.

Cleaning hands with soap and water or an alcohol-based rub at specific times, especially before and after patient contact and after removing gloves, to reduce microorganism transfer.

An item that penetrates soft tissue or bone or enters the bloodstream, such as a scalpel or surgical forceps, and therefore must be sterile before use.

An item that contacts mucous membranes but does not penetrate tissue, such as a mouth mirror or amalgam condenser; it requires at least high-level disinfection or sterilization.

A process that destroys all microorganisms, including bacterial spores, on an item; it is required for critical instruments and any item used in surgery.

A process that reduces or eliminates many disease-causing microorganisms on surfaces or semicritical items but does not necessarily destroy bacterial spores.

A device that sterilizes instruments using steam under pressure at a specified temperature and time; loads must be monitored to confirm the process worked.

A test using bacterial spores placed in a sterilizer load and then incubated to confirm that sterilization conditions were actually achieved; it is the most reliable sterilizer check.

A tank that uses high-frequency sound waves to create bubbles that scrub debris from instruments before sterilization; it does not sterilize and must be followed by proper packaging and sterilization.

A puncture-resistant, leak-proof container with a closable lid used to dispose of needles, scalpel blades, and other sharp items immediately after use to prevent injury.

The narrow tubing that carries water to handpieces and syringes; it can develop biofilm and must be flushed and treated according to a water-quality program.