What are extraoral radiographs?

Asked By: Huizhen Strohmeyer | Last Updated: 8th June, 2020
Category: medical health dental health
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Extraoral X-rays are used to detect dental problems in the jaw and skull.

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People also ask, what are the three types of dental images?

There are three types of diagnostic radiographs taken in today's dental offices -- periapical (also known as intraoral or wall-mounted), panoramic, and cephalometric. Periapical radiographs are probably the most familiar, with images of a few teeth at a time captured on small film cards inserted in the mouth.

Also Know, what is a cephalometric radiograph? A Cephalometric radiograph is a radiograph of the head taken in a Cephalometer (Cephalostat) that is a head-holding device introduced in 1931 by Holly Broadbent Sr. in USA. The Cephalometer is used to obtain standardized and comparable craniofacial images on radiographic films.

Beside this, what is a periapical radiograph used for?

A periapical x-ray is one that captures the whole tooth. It shows everything from the crown (chewing surface) to the root (below the gum line). Each periapical x-ray shows a small section of your upper or lower teeth. These x-rays are often used to detect any unusual changes in the root and surrounding bone structures.

What two planes are used to position the patient to take extraoral radiographs?

Panoramic radiography. There are four basic anatomical planes used to properly position a patient: the ala-tragus plane, orbital/meatus plane (the Frankfort plane), canine/meatus plane, and median sagittal plane. Devices for positioning the head and supporting the chin are also important for precise positioning.

18 Related Question Answers Found

What does Orthopantomogram mean?

An OPG (Orthopantomogram) is a scan that gives a panoramic view of your jaw and teeth. The scan can provide information on wisdom teeth, bone loss, orthodontic assessment, jaw trauma, dental pain, or be used as part of a general dental check-up.

Can dental Xrays show nerve damage?

X-rays can also be used to detect dead nerves in teeth. Although x-rays cannot provide an image of soft tissue, once the dead nerve has caused damage to the bone surrounding the apex, or tip, of the root, it can be spotted on an x-ray film.

What does a periapical radiograph show?

Periapical X-rays show the whole tooth — from the crown, to beyond the root where the tooth attaches into the jaw. Each periapical X-ray shows all teeth in one portion of either the upper or lower jaw. Periapical X-rays detect any unusual changes in the root and surrounding bone structures.

Does xray show gum disease?

X-rays play a vital part in the overall diagnosis of periodontal disease. In this x-ray, the bone and supporting tissues are normal. Your gums don't show up on x-rays but the bone does.

What is cephalometric imaging used for?

Cephalometric X-rays are diagnostic radiographs of the lateral skull. They are primarily used in orthodontic treatment planning and by otolaryngologists (ear, nose and throat specialists). Orthodontists use them to visualization the teeth, jawbone, soft tissues, and the nasal and sinus passages.

What is a cephalometric radiograph used for?

A cephalometric x-ray, which is also sometimes referred to simply as a ceph, is a diagnostic radiograph used primarily for orthodontic treatment planning1??. A cephalometric x-ray is taken during the orthodontic records appointment.

What does cephalometric mean?

Cephalometry is the study and measurement of the head, usually the human head, especially by medical imaging such as radiography. Craniometry, the measurement of the cranium (skull), is a large subset of cephalometry.

What is bitewing technique?

Bitewing Technique
The bitewing radiographic image is used to examine the interproximal surfaces of the teeth and is particularly useful for the detection of dental caries and alveolar bone levels. The receptor is placed into the mouth parallel to the crowns of the maxillary and mandibular posterior teeth.

What is a panorex?

A panorex is an x–ray that provides a full view of the upper and lower jaws, teeth, temporomandibular joints (TMJs) and sinuses.

What is a lateral Ceph?

A Lateral Cephalogram (or Lat Ceph) is an x-ray taken of the side of the face with very precise positioning, so that various measurements can be made to determine the current and future relationship of the top and bottom jaw (maxilla and mandible) and therefore assess the nature of a patient's bite.

What is a diagnostic cast?

A diagnostic dental cast is a cast model of a person's teeth that a dental professional uses as a guide in the application of corrective or restorative dentistry. Such diagnostic casts are often referred to as study models.

What is CBCT in dentistry?

Dental Cone Beam Tomography [Dental CBCT] is a specialized type of x-ray that provides more information than conventional dental or facial x-rays. This computerized scan uses advanced technology to generate three-dimensional[3-D] images.

How is Wits analysis calculated?

The “Wits” appraisal of jaw disharmony is a simple method whereby the severity or degree of anteroposterior jaw dysplasia may be measured on a lateral cephalometric head film. The method entails drawing perpendiculars from points A and B on the maxilla and mandible, respectively, onto the occlusal plane.

Why does digital radiography require less radiation?

Digital Imaging Radiation Exposure
Even though digital imaging requires less radiation than radiographic film, radiation is still produced at the source, e.g., dental x-ray machine. Digital imaging reduces the amount of radiation to the patient due to the sensitivity of the digital imaging sensors.