Dental Radiology and Anatomical Imaging

This set of flashcards covers dental radiology concepts including extraoral imaging projections, X-ray beam physics, fracture stability, and radiological patterns of bone lesions based on lecture notes.

Panoramic Rotation - Right

Rotation to the right results in magnification and overlap on the right side of the jaw, and shrinkage of the left jaw.

Mean Energy

Determined by filtration and kVp; it represents beam quality and increases when low-energy photons are removed.

Filtration

The use of materials like aluminum to remove low-energy photons, which increases mean energy while keeping maximum energy constant.

kVp (Kilovoltage peak)

A factor that increases mean energy, maximum energy, beam quality, and the quantity of photons.

Submentovertex (SMV) / Base

An extraoral projection used for the skull base, zygomatic arch fractures, and sphenoid sinus (integrity and aeration).

SMV Exposure Technique

Under-exposure is used for evaluating the zygomatic arch to avoid over-exposure caused by normal factors.

PA Skull

A projection with high usefulness for the orbit, nasal cavity, and frontal sinus.

Waters Projection

A projection where the canthomeatal line forms a $37^{\circ}$ angle with the receptor; highly useful for the orbit, zygoma, and maxillary sinus.

Open-Mouth Waters Projection

A variation where the sphenoid sinus is projected onto the patient's palate.

Reverse Towne (RT)

A projection performed with the mouth open, offering high usefulness for the condylar neck and condylar head.

Optical Density

The degree of film darkening, which has a useful upper limit of $1.5$ that can be increased with hot lighting.

Favorable Vertical Fracture

A fracture plane orientation that prevents medial displacement of the posterior fragment by the medial pterygoid muscle.

Favorable Horizontal Fracture

A fracture plane orientation that prevents displacement of the posterior fragment by the masseter muscle.

Wispy Septa

Fine, thin radiographic septa associated with Central Giant Cell Granuloma (CGCG).

Soap-bubble Appearance

Large, curved multilocular septa seen in Ameloblastoma and Odontogenic Myxoma.

Honeycomb Appearance

A multilocular pattern of small spaces seen in Calcifying Epithelial Odontogenic Tumor (CEOT).

Sunray Appearance

A radiating radiographic pattern associated specifically with Osteosarcoma.

Lamina Dura Loss

A radiographic feature linked to systemic conditions such as Hyperparathyroidism and Rickets.

Digital Resolution

Influenced by pixel size and phosphor thickness in digital systems; smaller pixel size increases resolution.

Universal Numbering System (Primary)

A system for primary teeth using letters ranging from A to T.