Year: 2013

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Case of the week: Horizontal root fracture

This week I have a case of a horizontal root fracture that is tricky to see on the initial radiograph but when another radiograph was made at a different horizontal angle it becomes clear as night and day. Take a look below. First radiograph, check out the mesial aspect of…
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Lateral Cephalometric Skull Anatomy – Part III

Now onto the temporal region. Zygomatic Arch (green area) – Made up by the zygomatic bone and zygomatic process of the temporal bone. Mandibular Notch (blue line) – Notch between the condyle and coronoid process of the mandible. Posterior margin of the ramus (white line) – Just as the name…
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Lateral Cephalometric Skull Anatomy – Part II

Onto part 2 of lateral cephalometric skull anatomy frequently used in orthodontics. Again identified on a dry skull first followed by the radiograph. Orbitale (black star) – The lowest point of the orbital margin (also the anterior point for the Frankfort horizontal plane). Key ridge (green heart) – The inferior…
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Anatomy Monday: Anterior Nasal Spine (maxilla)

This week’s anatomy is the anterior nasal spine which is found in the midline at the floor of the nasal cavity as a bony protuberance where the right and left maxilla meet (as seen on the skull below – orange arrow).On radiographs, this will appear as an inverted triangle or…
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Case of the week: Talon cusp with clinical photo

This week I have a case of a large talon cusp on a maxillary central incisor along with a clinical photo.  A talon cusp is a hyperplasia of the cingulum of a tooth and typically classified as a variant of normal anatomy.  In the anterior, it will present as a…