Intraoral_Radiography_Part_1.pptx for bds

Intraoral radiographic techniques

1. INTRAORAL RADIOGRAPHY PART - I

2. Periapical Bitewing Occlusal RADIOGRAPHS

3. Periapical views are used to record the crowns , roots, and surrounding bone. Root canal treatment. Assessment of root formation n completion. Assessment of root morphology. Assessment of relationship of roots to various vital structures. Implant site assessment and placement. PERIAPICAL RADIOGRAPH

4. Paralleling Angle Technique (Long Cone and Right Angle Technique)

5. PRINCIPLE The central concept of the paralleling is that “ T he x-ray receptor is supported parallel to the long axis of the teeth and the central ray of the x-ray beam is directed at right angles to the teeth and receptor ”. M inimizes geometric distortion and presents the teeth and supporting bone in their true anatomic relationship .

6. Instruments Receptor P l acement Angulation

7. If the lack of parallelism does not exceed 20, the radiograph is generally acceptable. Place 1 or 2 cotton rolls on bite block. Increase the vertical angulation by 5 to 15 degrees Sha l l ow palate

8. For maxilla, place the film on far side of the film Bony growth For mandible, place film between the tori and tongue

9. ADVANTAGES DISADVANTAGES Accuracy Difficult for a beginner Simplicity Dis c omfort Duplication Patient Compl i ance

10. Bisecting Angle Technique

11. The bisecting-angle technique is based on a simple geometric theorem, Cieszynski ’ s rule of isometry, which states that two triangles are equal when they share one complete side and have two equal angles.

12. Receptor is positioned as close as possible to the lingual surface of the teeth , resting in the palate or in the floor of the mouth . The plane of the receptor and the long axis of the teeth form an angle, with its apex at the point where the receptor is in contact with the teeth. An imaginary line that bisects this angle, direct the central ray of the beam at right angles to this bisector.

13. No XCP film holder required . Better technique when anatomical variations hinder paralleling tech . Decreased exposure time. Advantages

14. To reproduce the length of each root of a multi-rooted tooth accurately, the central beam must be angled differently for each. Another limitation of this technique is that the alveolar ridge often projected more coronally than its true position, thus distorting the apparent height of the alveolar bone around the teeth. Disadvantages

15. Bitewing radiographs include the crowns of the maxillary and mandibular teeth and the alveolar crest on the same receptor. Bitewing Radiograph

16. interproximal caries in the early stages. secondary caries below restorations. Overhanging restorations. evaluating the periodontal condition(alveolar bone crest ) . detecting calculus deposit s . INDICATIONS

17. Vertical Bitewing Horizontal Bitewing Types of Bitewings

18. An occlusal radiograph displays a relatively l arge segment of a dental arch . To localize foreign bodies in the jaws and stones in the ducts. To demonstrate and evaluate the integrity of the outlines of the maxillary sinus. W hen patients are unable to open the mouth . Help in localization of object. OCCLUSAL RADIOGRAPH

19. l ocation , nature, extent, and displacement of fractures of the mandible and maxilla . To determine the medial and lateral extent of disease (e.g., cysts, osteomyelitis, tumors ) and to detect disease in the palate or floor of the mouth.

20. MAXILLARY ANTERIOR OCCLUSAL PROJECTION Image Field Receptor Placement Projection of Central Ray Point of Entry

21. Image Field Receptor Placement Projection of Central Ray Point of Entry MAXILLARY CROSS-SECTION OCCLUSAL PROJECTION

22. Image Field Receptor Placement Projection of Central Ray Point of Entry MAXILLARY LATERAL OCCLUSAL PROJECTION

23. Image Field Receptor Placement Projection of Central Ray Point of Entry MA NDIBULAR ANTERIOR OCCLUSAL PROJECTION

24. Image Field Receptor Placement Projection of Central Ray Point of Entry MA NDIBULAR CROSS-SECTION OCCLUSAL PROJECTION

25. Image Field Receptor Placement Projection of Central Ray Point of Entry MA NDIBULAR LATERAL OCCLUSAL PROJECTION

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