SLOB Technique

SLOB Technique Radiographic technique used to Locate superimposed structures in Dentistry.

1. .SLOB TECHNIQUE .Its INDICATIONS . advantages and DISadvantages . Department of Operative D entistry Presenter: MANSOOR AHMED Supervised by Dr: M.ALI

2. What is SLOB Technique? Stands for: S ame L ingual, O pposite B uccal Also known as: Cone shift technique Tube shift technique. Clark’s technique. Buccal object rule. The principle states that the object closest to the buccal surface appears to move in the direction opposite the movement of the cone or tube head, when compared with a second film. Objects closest to the lingual surface appear to move (on a film) in the same direction that the cone moved; thus the "same lingual, opposite buccal " rule

3. . when the tube head is shifted mesially , the lingual or palatal root will also be shifted mesially (in the same direction as the shifted tube head) on the developed film and the buccal or mesiobuccal root will be shifted distally (in the opposite direction as the shifted tube head

4. Basic Radiographic Technique .The film is placed parallel to the plane of the arch. .Cone has the central ray.

5. SLOB Radiographic Technique

6. Indications and Advantages of SLOB technique Separation and identification of superimposed canals

7. 2.Movement and I dentification of superimposed structures An example is the zygomatic process,which often obscures the apices of maxillary molars.

8. 3.Determination of working length

9. 4.Determination of curvatures

10. 5.Determination of faciolingual locations. ( One of the important indication for impacted canines.)

11. 6.Identification of undiscovered canals

12. INDICATIONS / ADVANTAGES ( Continued) 7. Location of Calcified Canals. 8 . A pplication of the technique allows to distinguish between various types of resorption . 9 . It also helps the to determine the buccolingual position of fractures and perforative defects. 10. To locate foreign bodies and to locate anatomical landmarks in relation to the root apex, such as mandibular canal.

13. Disadvantages 1. Decreased Clarity Rays passing through the object and striking the film at an angle the object becomes blurred.(More angle = More blurred) 2.Superimposition of structures Objects that ordinarily have a separation on parallel radiographs may, with cone shift,move relative to each other and become superimposed. Example: Roots of Maxillary molar. A mesial or distal angled radiograph moves the palatal root over the distobuccal or mesiobuccal,reducing the ability to distinguish the apices clearly.

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