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OBJECT LOCALISATIONOBJECT LOCALISATION
Localization byLocalization byRadiographic TechniquesRadiographic Techniques
WHY?WHY?
Foreign bodies Impacted, unerupted teeth Supernumerary teeth Broken needles Retained roots Fractures of maxillofacial structures Soft tissue calcifications Intra-osseous tumors Calculi in gland/duct of gland Filling materials in alveolar process
TechniquesTechniques
Miller’s Technique/ Right angle Technique
Clark’s Technique/ Tube-shift Technique
MillerMiller’’s Techniques Technique
Usually Indicated for Mandibular Third molar area
Two radiographs made are positioned at right angles to each other
LOCALIZES in 3 Dimensions
DISADVANTAGES Can be used in maxilla but not that useful
like in mandible due to superimpositions
FISSURE BUR
FOREIGN BODY
WATERS VIEW LATERAL VIEW
INTRA OSSEOUS TUMOURS
Occlusal viewLateral view
Lateral oblique
Occlusal view
ClarkClark’’s rules rule
Tube shift technique , C.A. Clark
PRINCIPLE
Relative positions of radiographic images of two separate objects changes ,when projection angle at which images were made, is changed
The image of Tooth that is farther away from X-
ray tube(lingual) moves in same direction as
tube and Image of Tooth closer to X-ray tube
(Buccal) moves in opposite direction
SLOBSLOB
Lingual body moves in same direction SLOBSLOB
Buccal body moves in opposite direction
SLOBSLOB
SAME LINGUAL OPPOSITE BUCCAL