Intra oral radiograph techniques

Intra-oral radiograph techniques

Intra-oral radiograph techniques
• What are the types of intra-
oral radiograph????

1. periapical
• What are the benefits?
I. Designed to show teeth and tissues around
the apices.
II. Show 2-4 teeth.
III. Provide detail about the surrounding alveolar
bone.

periapical
• Indication????
I. Apical infection/cyst
II. Impacted tooth
III. Endo ttt
IV. Root morphology before surgery
V. Evaluate implants.

periapical
• Our technique
HOW WE DO IT???
• We have 2 technique:
1. Parallel tech;
2. Bisecting tech;

periapical
A. Parallel tech;
Concept “ film parallel to long axis of teeth”
Soooo, the x-ray beam at right angle,
That’s why it is called “right-angle Or long -cone tech”.
• The goal:
To reduce the geometric distortion
True anatomic relation
Increase sharpness, reduce magnification

periapical
• Steps:
1. Film position; parallel to
long axis and away from tooth.
“object film distance”
1. Target –film distance “16 -inch”
2. Film holder.

periapical
• Rules:
I. Film placement “ cover target area”
II. Film position “ parallellong axis”
III. Vertical angulation “ perpendicular on both ilm and
log axis”
IV. Horizontal angulation “thr contact area of teeth”
V. Film exposure “ avoid cone cut”

periapical
• Adv:
1. Accurate image “ actual size, no distortion, max detail”
2. reproducible radiograph.
3. Vertical and horizontal angul. Automatically determined.
4. Relation of object-film-xray source maintained.
• Dis adv:
1. Placement difficulties “inexperienced drs, child, small
mouth or shallow palate”
2. Discomfort.
3. cost

periapical
B. Bisecting technique:
1. Operator unable to do parallel
tech.
2. Depend on rule of isometry “ 2
triangle with equal angulation.
3. Film placed close as possible to
teeth.
4. Ptns hold the film
5. X-ray beam perpendicular
to??????
The imaginary bisector

periapical
6. Horizontal angulation
“ same parallel”.
7. Vertical angulation

periapical
• Incorrect vertical angulation;
A. Shortened image.
B. Elongated image.

• Incorrect horizontal angulation:
“overlapping”

periapical
• Adv of bisecting:
1. Simple tech, quick
2. Comfortable
3. Less equipment “no film holder, no long cone”
4. Anatomy of ptns preclude the use of holder.
• Dis adv:
1. Image distortion: using short PID cause divergence of
x-ray.
2. Not reproducible.
3. Skill required.
4. Cone cut may occur

2. Bite-Wing
• Ptn bite on a small wing attached to film “ this explain
name”
• Include max. and mand.
teeth, interproximal area ,
and crestal bone in one image

Bite-Wing
• Indication:
1. Proximal caries.
2. Evaluation of restoration “overhang”
3. Evaluate alv. Bone crest level.
4. Evaluate pulp chamber

Bite-Wing
• Principle:
I. Film placed parallel to crowns
II. Stabilized whn ptn bite on the tab/holder
III. X-ray beam thr contact of the teeth wz +10 degree
vertical andulation

Bite-Wing
• Rules:
1. Film placement
2. Film position
3. Vertical angulation
4. Horizontal angulation
5. Film exposure

3. oclussal
• Expose all Maxilla Or Mandible.

oclussal
• Techniques:
Mand “90-45”

oclussal
• Upper (up. Standard or anterior)

oclussal
• Indication:
1. Supernumerary teeth, impacted teeth
2. Foreign bodies in jaws and salivary gland.
3. Lesions in jaws “cyst ,malignancy,…..”
4. Examine max. sinus “anterior, medial, lateral wall”
5. Examine ptns wz trismus.
6. Fx in mand and max.
7. Cleft palate.
8. Size of the jaws

Intra oral radiograph techniques

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