1. Intraoral Radiographic Anatomy Unit 2

2. Radiographic Density Radiopacity – light on film Radiolucency - dark on film Page 24 of Dr. Beck’s Note

3. Radiopaque vs. Radiolucent Radiopaque:refers to a light area on the film –Structures that are absorbers of x-rays block the x-rays from reaching the film –The x-rays are attenuated (decreased in intensity) by absorbing structures –Fewer photons reach the emulsion –Dense structures are strong absorbers

4. Radiopaque vs. Radiolucent Radiolucent:refers to a dark area on the film –Structures that are less dense are poor absorbers and allow more photons to reach the film emulsion

5. Radiopaque vs. Radiolucent Enamel Cementum Dentin Bone Muscle Fat Air Restorative and surgical materials have various densities and abilities to absorb. Metallic materials are more dense than enamel, thus appear very white on radiographs

6. NIH

7. Follicle

11. Trabecular Pattern

14. Sparse Trabeculation Inferiorly

17. Dental Papilla

20. Mandibular Posterior Region

21. Alveolar Ridge

22. External Oblique Ridge

23. Mylohyoid Ridge

24. Mandibular Canal

25. Enlarged PDL Space?

26. Inferior Border of Mandible

27. Inf. Alveolar Canal

29. Oblique Ridges

38. Mental Foramen

41. Anterior Looping of the Canal

44. Quiz 2. Normal or abnormal?

45. Posteriorly Positioned Foramen

46. Anterior looping of the canal

47. Mandibular Tori

48. Anterior Mandible

50. Genial Tubercle

54. Nutrient Canals

58. Mental Fossa Radiolucent depression between alveolar ridge and mental ridge

59. Mental Ridge

61. Maxillar

63. Mandible

83. All Those Horizontal Lines!

84. Alveolar Ridge

85. Floor / Wall of Maxillary Sinus

86. Zygomatic Arch (Inf. Border)

87. Zygomatic Process of Maxilla

88. Floor/wall of Nasal Cavity

89. Tuberosity

90. Hamular Notch

92. Coronoid Process

93. Resorption of Coronoid Process?

94. Clinical Hamular Notch

95. Tuberosity

96. Maxillary Sinus Floor of sinus extends to alveolar crest due to missing teeth

97. Floor / Wall of Maxillary Sinus Wavy outline of the sinus

98. Relatively smooth outline

100. Nasolabial Fold/ Cheek Mass

101. Maxillary Anterior Region

102. Anterior Nasal Spine Radiopaque V-shaped

103. Floor of Nasal Cavity Extends bilaterally away from ANS

104. Incisive Foramen Variable size and shape, border Variable position, due to angulation of x-ray beam

105. Nasopalatine Canal Transmits nasopalatine nerves and vessels Terminates in incisive foramen Not always seen

106. Sup. Foramina of Nasopalatine On each side of nasal septum Mostly seen when  vertical angle

107. Nasal Septum Superimposition of septal cartilage and vomer Deviated septum

108. Inferior Concha In the nasal fossa Away from the septum

109. Nasal Mucosa

110. Intermaxillary Suture Median suture Extends from alveolar crest through ANS, posteriorly to distal aspect of hard palate Uniform width Variable shape –Angulation of central ray

111. Soft Tissue Outline of Nose

112. Nasal turbinates

113. Inverted Y-Line

116. Foramena of Stenson and Scarpa

122. Orbital Entrance of Naso-lachrymal Canal