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RADIOGRAPHIC INTERPRETATION PowerPoint PPT Presentation


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RADIOGRAPHIC INTERPRETATION. CDS 824. PERIAPICAL RADIOGRAPHS PANORAMIC RADIOGRAPHS BITEWING RADIOGRAPHS. Approach radiographic interpretation as you do all other aspects of evaluation – systematic and repetitive. NORMAL VS. ABNORMAL. Anatomy (hard tissue, soft tissue)

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RADIOGRAPHIC INTERPRETATION

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RADIOGRAPHIC INTERPRETATION

CDS 824


  • PERIAPICAL RADIOGRAPHS

  • PANORAMIC RADIOGRAPHS

  • BITEWING RADIOGRAPHS


Approach radiographic interpretation as you do all other aspects of evaluation – systematic and repetitive


NORMAL VS. ABNORMAL

  • Anatomy (hard tissue, soft tissue)

  • Variants (torus, root shape)

  • Pathology ( decay, bone loss, disease)


Set Yourself Up for Success

View radiographs in a darkened area with a lighted viewbox


Periapical Radiographs

Full Mouth Series


Develop a routine for intrepretation


My Routine

  • Start above the apices of the teeth on the upper right

  • Proceed around the arch to the left, bottom left, and bottom right

  • Look for normal or abnormal anatomy


Routine continued

  • Examine the bone, root formation, and all structures supporting the teeth

  • Again, look for normal or abnormal appearances such as dilacerated roots, root canals, bone loss, etc.


Final Exam of a FMX

  • Look for decay last on the BWX and anterior periapicals


Common Anatomical Landmarks on Periapical Films


Zygoma

  • Malar Shadow


Coronoid Process

  • This can sometimes be viewed on a second molar shot


Maxillary Sinus

  • This frequently seen on molar films


Nasolabial Fold

  • The soft tissue shadow cast by the cheek at its junction with the lip


INVERTED Y

  • The inverted y appearance is comprised of the floor of the maxillary sinus and the floor of the nasal fossa


Intermaxillary Suture

  • Appearance of the two processes of the maxilla joining


Lateral Fossa

  • Appearance of thinner bone in the area of a smaller rooted tooth


Incisive Foramen

  • Exit point for the nasopalatine nerve


Anterior Nasal Spine

  • Will appear apical to the roots of the maxillary central incisors


External Oblique Ridge

  • Anterior border of the mandibular ramus


Internal Oblique Ridge

Also known as the mylohyoid ridge – serves as attachment for the mylohyoid muscle


Mandibular Canal

  • Appearance of the housing for the inferior alveolar nerve


Mental Foramen

  • Anterior exit of the mandibular nerve


Genial Tubercle

  • Attachment for the genioglossus and the geniohyoid muscles


Lingual Foramen

  • Exit for the incisive branch of the mandibular nerve


Mental Ridge

  • Appear apical to the mandibular incisors


Border of the Mandible


Mandibular Tori

  • Will appear as diffuse radiopaque area superimposed on roots of teeth


Root Dilaceration

  • Carefully observe all apices of roots for curves – especially if doing endo or extract!


Root Canal Treatment

  • Examine root canal therapy for type of fill, adequacy of fill, lesions, etc.


Composites and Other Resins

  • Resins will appear radiolucent – so must check clinically to verify the status of the tooth


Metal Castings

Appearance will be very regular – not anatomical like an amalgam


Amalgam Restoration

  • Outline will be irregular following the disease process that was removed


Bitewing Radiographs


Decay at the Contact Point


Decay Proximity to Pulp

  • BWX are very helpful in helping visualize decay proximity to pulp


BWX and Restorability

  • BWX are the most helpful in determining restorability of a tooth


Panoramic Films

Helpful for viewing impacted teeth, bone lesions, and anatomical structures not captured on periapical films.


Zygoma


Pterygomaxillary Fissure


Hard Palate


Soft Palate


Styloid Process – Stylohyoid Ligament


Tongue – Air Space


Turbinates- Concha


Orbit of the Eye


Border of the Mandible


Mandibular Canal


Hyoid Bone


Condyles


Artifacts

  • Earrings

  • Hearing Aids

  • RPD

  • Dentures


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