Occlusal and Accessory Radiographic Techniques

Unit 5

20 cards·by dentalstudent

Occlusals may be used as a __________ technique

accessory

used to view what?

large areas of the maxilla or mandible arch on one film

Can occlusals be used in raplacement of a PA?

yes, when the area is too large for a PA or when it is too difficult to place the PA

List 4 purposes of occlusal technique

1)locate roots, supernumerary teeth, unerupted & impacted teeth2) located foriegn bodies in the jaw3)salivary stones4) fractures

3 basic Principles

1)White side of film is facing arch being exposed 2)Fiilm placed between occlusal surfaces 3)stabilized by gently biting

Cross Sectional Projection, also known as

Right angle projection

Cross sectional projection, the central ray hits the film at a 45 degree angle .T or F

False, hits the film at a 90 degree angle, creating a right angle

What is cross sectional technique used for locatiing? (3)

tori, impacted teeth/mal-positioned teeth & localizing objects

Where is the CR directed wit the Topographic technique?

directed through the apices of the teeth which are perpendicular to the bisector. ( Following bisecting rules)

Topographic technique is used to find tooth fractures and large lesions. T or F

True

If you change this angulation of your PID and the object on the film moves in opposite direction from the original film, what does this tell

The object is located on the buccal surface

List some indications for Extra-oral radiographs

- examine skull, max mand., TMJ -Used when client is swollen or is experiencing discomfort - conjunction with intra oral

6 pieces of equipment for extra oral.

1) xray unit 2) cassette 3)Film 4)Intensifying screens 5)Holding device 6)grid

Extra Oral technique used to examine posterior of mandible

Lateral Jaw Projection

techique used to evaluate facial development, trauma, disease, absnormal growths

cephlometric - lateral skull

What is the Cephlometric - Posterior anterior technique used for

used to identify frontal & ethnoid sinuses, orbits & nasal cavity

Waters' Sinus Projection

Evaluates frontal, maxillary, and ethmoid sinuses

This technique is used to view the base of the skull and to evaluate an factures in the zygomatic arch.

Submentovertex

Used to examine fractures of the condylar neck of the mandible and ramus

Reverse-Towne technique

Transcranial technique is used to diagnose?

ankylosis, fractures and tissure damage due to arthritis