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口腔颌面外科

学会看口腔全景X光片

发表者:杨辉俊 人已读


Welcome. In navigating through the slides, you should click on the left mouse button when (1), you see the mouse holding an x-ray tubehead (see below), (2) you are directed to “click” for the next action and (3) you are done reading a slide. Hitting “Enter” or “Page Down” will also work. To go back to the previous slide, hit “backspace” or “page up”.  北京大学深圳医院口腔科杨辉俊
                                                          Click for next slide
Panoramic Anatomy
The following is a PowerPoint presentation. If you right click on the screen and select “Full Screen”, the images should fill the entire screen.  If you want to print slides 7, 8 and 9, you must right-click, select “End Show” and then right click again on slide you want to print and select “Print”.
                                                       Types of Panoramic Images
                                                                 Single Real Image
                                                                   Double Real Image
                                                                      Ghost Image
Single Real Image
Only one image results from a given anatomical structure. The structure is located between the rotation center and the film and the x-ray beam only passes through the structure one time. Most images seen on a panoramic film are of this type.
Double Real Image
Two images of a single object are seen on the film. Double real images are produced by structures located in the midline. The x-ray beam passes through these objects twice as the tubehead rotates around the patient. Structures that result in double real images are the hard and soft palates, the hyoid bone and the cervical spine.
Ghost Image



Panoramic Anatomy






The numbers on the diagram below and on the next slide (air spaces) correspond to the numbers on the key (slide 9).


Air Spaces


Panoramic Anatomy Key

1.  maxillary sinus
  2.  pterygomaxillary fissure                  
  3.  pterygoid plates
  4.  hamulus
  5.  zygomatic arch
  6.  articular eminence
  7.  zygomaticotemporal suture
  8.  zygomatic process
  9.  external auditory meatus
10. mastoid process
11. middle cranial fossa
12. lateral border of the orbit
13. infraorbital ridge
14. infraorbital foramen
15. infraorbital canal
16. nasal fossa
17. nasal septum
18. anterior nasal spine
19. inferior concha
20. incisive foramen
21. hard palate
22. maxillary tuberosity
23. condyle
24. coronoid process                          
25. sigmoid notch
26. medial sigmoid depression
27. styloid process
28. cervical vertebrae
29. external oblique ridge
30. mandibular canal
31. mandibular foramen
32. lingula
33. mental foramen
34. submandibular gland fossa
35. internal oblique ridge
36. mental fossa
37. mental ridges
38. genial tubercles
39. hyoid bone
40. tongue
41. soft palate
42. uvula
43. posterior pharyngeal wall
44. ear lobe
45. glossopharyngeal air space
46. nasopharyngeal air space
47. palatoglossal air space
The following slides show anatomical structures seen on panoramic films. See what other structures you can identify that are not labeled. At the end of this presentation there are 11 test slides.
















Red arrows point to ghost image of hard palate



How old is this patient?
a.    6-9 years
b.10-12 years
c.13-15 years
d. 10-12 years old






What head positioning error is seen on this film?

The anterior teeth are positioned in front of the notch in the bitestick, resulting in the widening of the anterior teeth (the maxillary central incisors are as wide as the molars).



What head positioning error is seen on this film?


The head is tipped down too much, resulting in shortened mandibular incisors and a V-shaped mandible.  



LN = calcified lymph node
E = epiglottis



? Identifies calcification, possibly in carotid or in lymph node


What positioning error is seen on this film?
The head was turned to the left, bringing that side closer to the film and decreasing the width of the ramus on that side. The green arrow points to the biteblock, centered on the contact between the right central and lateral incisors.



E = epiglottis



The chin is tipped up too much, giving a more squared off appearance to the mandible, creating a reverse smile and causing the hard palate to be superimposed on the roots of themaxillaryteeth.


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发表于:2011-04-15 20:18

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