PRINCIPLES OF RADIOGRAPHIC INTERPRETATION

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PRINCIPLES OF RADIOGRAPHIC INTERPRETATION

• DR SAMY I ALAGHA
• A PROFESSORCONSULTANT OF RADIOLOGY

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GUIDELINES FOR ORDERING DENTAL RADIOGRAPHS

• MAKE RADIOGRAPHS ONLY AFTER A CLINICAL
  EXAMINATION.
• ORDER ONLY RADIOGRAPHS THAT DIRECTLY BENEFIT THE
  PATIENT IN DIAGNOSIS TREATMENT.
• USE THE LEAST AMOUNT OF RADIATION EXPOSURE .

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CLINICAL SITUATIONS NEED RADIOGRAPHIC EXAMINATIONS

• 1-DENTAL CARIES
• 2-PERIODENTAL DISEASES
• 3-DENTAL ANOMALIES
• 4-GROWTHDEVELOPMEN AND DENTAL MALOCCLUSION
• 5-OCCULT DISEASES
• 6-TMJ DISORDERS
• 7-IMPLANTS
• 8-PARANASAL SINUSES
• 9-TRAUMA

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RADIOGRAPHIC INTERPRETATION

• CLINICAL EXAMINATION
• QUALITY OF DIAGNOSTIC IMAGE
• NUMBER TYPE OF AVAILABLE IMAGES
• VIEWING CONDITIONS

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IMAGE ANALYSIS

• Systematic radiographic examinationgtgtgtidentify
  normal anatomyexaminte the entire film
• Inraoral imagesgtgtgtexamine the periapical films
  before the bitewing films starting in the RT
  maxilla to its LT then drop down in the LT
  mandible to its RT
• Extraoral imagesgtgt panoramic films,cephalometric
  viewsTMJ views

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ANALYSIS OF INTRAOSSEOUS LESIONS
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STEP 1LOCALIZE THE ABNORMALITY

• LOCALIZED OR GENERALIZED
• POSITION IN THE JAWS
• SINGLE OR MULTIFOCAL
• SIZE

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STEP 2ASSESS THE PERIPHERY SHAPE

• Is the periphery of lesion well defined or ill
  defined?
• SHAPE OF LESIONgtgtgtCircular or fluid filled
• gtgtgtScalloped
  in cystic or cystlike lesions

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STEP3ANALYZE THE INTERNAL STRUCTURE

• Air,Fat,or Gas
• Fluid
• Soft tissue
• Bone marrow
• Trabecular bone
• Cortical bone dentine
• Enamel
• Metal

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STEP4ANALYSE THE EFFECTS OF THE LESION ON
SURROUNDING STUCTURES

• TEETH,LAMINA DURA,PERIODENTAL MEMBRANE SPACE
• INFERIOR ALVEOLAR CANALMENTAL FORAMEN
• MAXILLARY ANTRUM
• SURROUNDING BONE DENSITYTRABECULAR PATTERN
• OUTER CORTICAL BONEPEIOSTEAL REACTION

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• END