Mandible TMJ Lecture RT 233 Week 7 FINAL

Mandible & TMJ Lecture RT 233 Week 7 (FINAL)

Mandible 2

Mandible 1. Only ______ bone in the skull 2. ______& ______ facial bone 3. ___ bones at birth 4. Contains mental _______ 3

Temporomandibular Joint 4

Indications

PA Mandible (rami) 1. ____ or ____ 2. _________ and nose on IR 3. ____& ____ perpendicular to IR 4. CR perpendicular to exit _______ 6

PA Mandible (rami) Radiograph 1. Mandibular ____ 2. ____ portion of ______ are visualized 3. Entire mandible without _____ or _____ 4. _____ or _____ displacement 7

PA Mandible Rami- Diagram 8

PA Mandible (body) 1. ____or _______ 2. ____ and ____ on grid device or table n Mandibular symphysis ______with plane of IR 3. ___ & ___ perpendicular to IR 4. CR perpendicular to level of ____ 9

PA Mandible (body) Radiograph 1. Contrast and density are sufficient to view body and rami 2. Sharp bony detail indicating no motion 10

PA Axial (rami) Mandible Positioning 1. Seated or _______ 2. Forehead and _____ on IR 3. _____ & MSP perpendicular to IR 4. CR 20 - 25 _____, centered to exit 11

PA Axial (rami) Mandible Radiographs 1. Heads of ____ are visible through ______ processes. 2. Condyloid processes are slightly _____. 3. Proper density 4. No rotation or tilt 12

PA Axial (body) Mandible Positioning 1. Seated or Prone 2. ____ and ____on grid device or table 1. mandibular symphysis ______ with IR 3. ____ & _____ perpendicular to IR 4. CR between TMJ’s, 30 ______ 13

PA Axial (body) Mandible Radiographs 1. TMJ’s just ____ to mastoid process 2. Symmetric ______ 3. Adequate contrast and density 14

AP Axial – Towne Method 1. ____ & MSP perpendicular to IR 2. CR _____ caudad 3. Centered to glabella 4. If IOML is used increase CR angle ____ degrees 15

AP Axial- Towne Method Radiograph 1. Demonstrates condyloid processes symmetrically 2. Clear visualization of TMJ fossae and condyle relationship 3. Minimal SI of TM fossae and mastoid portions 16

Axiolateral Oblique Positioning for Ramus 1. Seated, semiprone or semisupine 2. IPL ______ to IR 3. Mouth closed_____ together 4. Extend neck, chin ______forward 5. CR __ degrees _____to pass through area of 17

Axiolateral Oblique Radiograph for Ramus 1. No overlap of ramus by opposite side of mandible 2. No elongation or foreshortening of ramus 3. No superimposition of ramus by c-spine 18

Axiolateral Oblique Positioning for Body 1. Seated, semiprone or semisupine 2. IPL perpendicular to IR 3. Mouth closed- teeth together 4. Extend neck, chin jutted forward 5. Rotate pt’s head _____ degrees toward IR 19

Axiolateral Oblique Radiograph for Body 1. No overlap of body by opposite side of mandible 2. No elongation or foreshortening of body 3. No superimposition of body by c-spine 20

Axiolateral Oblique Positioning for Mandibular Symphysis 1. Seated, semiprone or semisupine 2. IPL perpendicular to IR 3. Mouth closed- teeth together 4. Extend neck, chin jutted forward 5. Rotate pt’s head __ degrees toward IR 6. CR 25 degrees cephalic to pass through area of interest 21

Axiolateral Oblique Radiograph for Mandibular symphysis 1. No overlap of mentum by the opposite side of mandible 2. No foreshortening of the mentum region 22

Panorex Mandible 1. Explain how tube/image receptor move 2. IOML perpendicular 3. Stand straight, not jutting chin forward 4. Instruct pt to keep lips together and tongue on roof of mouth 23

Panorex Mandible Radiographs 1. Demonstrates teeth, mandible, TMJ’s 2. Density are uniform across image 3. No artifacts 24

Fractures and Surgical Repair

Surgical Fixation 26

Jaw wired shut 27

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