Mandible - Oblique

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Radiographic Positioning

Other related pages of interest

Name of projection Mandible - Oblique (Left / Right)
Area Covered Rami, condylar and coronoid processes, body and mentum of mandible nearest to IR
Pathology shown Fractures, neoplastic and inflammatory processes
Radiographic Anatomy Mandible Radiographic Anatomy
IR Size & Orientation 18 x 24cm
Film / Screen Combination Regular
(CR and DR as recommended by manufacturer)
Bucky / Grid Moving or Stationary Grid
Filter No
Exposure 60 kVp
FFD / SID 100cm
Central Ray CR angled 25° cephalad
Direct CR to exit mandibular region of interest
Collimation Collimate closely to mandible
Markers Anterior and Inferior
Marker orientation AP
Shielding Gonadal (check your department's policy guidelines)
Respiration Suspend
  • Patient is standing or sitting next to the upright bucky
  • Place head in a lateral position with side of interest against IR
  • If possible have patient close mouth and bring teeth together
  • Extend neck (to clear the mandible of the cervical spine)
  • Rotate the head in an oblique direction (the degree of obliquity depend upon the section of manible that is of interest) - the area of interest should be positioned parrallel to the IR
    • Head in true lateral position demonstrates ramus
    • 30° rotation demonstrates body
    • 45 ° rotation demonstrates mentum
    • 10° to 15° rotation provides a general survey of mandible
  • CR angled 25° cephalad
  • Direct CR to exit mandibular region of interest

Area Covered
Special Notes