Week 5 SDL Answers

Radiographic Anatomy Task Answers

Task 1 Answers¹

For 1 & part of 2 only. You may check your radiographic descriptions (2 &3 answers) during your radiology rotation.

1. a. Right posterior mandibular PA (of 46-47 region) b. 3 anatomical structures or landmarks

   • Right mandibular canal
   • Inferior border of the right mandible
   • Developing follicle of Tooth 48

2. a. Anterior maxillary PA (of 11-21 region) b. 3 anatomical structures or landmarks

   • Same as the sample xray (intermaxillary suture is not as obvious, however)

3. a. Left bitewing b. 3 anatomical structures or landmarks

   • Lamina dura of teeth
   • PDL spaces of teeth
   • Trabecular bone and alveolar crest

Mandibular Radiographic Landmarks

4. a. Mandibular anterior PA (or 32-42 region) b. 3 anatomical structures or landmarks

   • Nutrient canal/s (41-42 site is most evident)
   • Lamina dura of teeth
   • PDL spaces

5. a. Left posterior maxillary PA (of 24-26 region) b. 3 anatomical structures or landmarks

   • Left maxillary sinus (and the floor) – not the prominent alveolar recess at the edentulous 26 site.
   • Lamina dura of teeth
   • PDL spaces

Task 2 Answers

1. Maxillary denture in situ (ceramic teeth – not commonly used anymore)
2. Maxillary space maintainer in situ (orthodontic device)
3. Maxillary denture in situ (metal mesh covering the premaxilla)
4. Three left maxillary implants in situ

Footnotes

1. Original PDF page 1: Answers for Week 5 SDL, p.1 ↩