Lesson
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Transcript of Lesson
Objectives
Identify normal anatomical landmarks
Identify carious lesions and dental disease on an x-ray
Relate radiographic findings with dental patient symptoms
At the end of this unit the student will:
Content
This presentation is to better help you understand the reading materials for the interpretation chapter in your textbook. Please
do not use this presentation alone as your source of understanding. Most terms and definitions have been defined in previous chapters and in the one for this unit. This is for visual
and further understanding.
Depicts posterior molars and premolars biting togetherused to detect early to advanced dental cavities
Bitewing Radiograph
Normal Anatomy
Nasal Septum
OrbitCondyleGlenoid Fossa
Hard Palate
Maxillary Tuberosity Maxillary Tuberosity
Collar BoneCollar Bone
Border of Mandible
Mandibular Canal
Internal Oblique Ridge
External Oblique Ridge
Mental Foramen
Sub-Mandibular Fossa
Lingual Foramen
Normal Anatomy on the Panoramic Radiograph
Normal Anatomy
BoneBone
Bone
NerveEnamel
Nerve
Carious Lesions and Abnormalities
Cavities on an x-ray will appear in between the teeth (interproximally) just below the contact point. They appear as early grey/dark notches and progress to shadowed areas as depicted here.
Can you find the cavity in this x-ray? Click if you can’t see it
What About Here?
Restorative Materials Are Normal
Crowns appear as bright white areas covering the entire crown of the toothWhite or composite fillings are less bright than crowns or silver amalgam fillings
Silver or Amalgam fillings are bright white areas usually only appearing on one part of the tooth
More Restorative Materials
Root canals are seen on x-rays when the nerve of the tooth is bright white
To replace teeth that have been lost, patients often opts for permanent implants or fixed bridges
Identify The Material
1
23
4
5
1. Implant
2. Root Canal
3. White Filling4. Silver Filling
5. Bridge
Other Abnormalities
Grey areas surrounding the root(s) of a tooth are termed periapical radiolucencies or lesions. These are indicative that the nerve is infected either from decay or trauma or bacteria.
Dental calculus appears as white wing-like projections
Wisdom Teeth
Wisdom teeth are difficult to see on bitewing or periapical films so a panoramic is often necessary to determine whether they should be taken out or left alone. The highlighted areas show
impacted third molars in the lower jaw.
CASE STUDIES
Continue
Using your textbook and the notes provided, determine the most likely
diagnosis based on the patient symptoms and radiographs. Try to answer them yourself. The answers will appear in the blue areas at the
bottom of the slide.
CASE 1: ABIGAIL, 18
Impacted third molars and Extraction
This morning, Abigail’s mother called the office stating that her daughter is having pain in her jaw that has been getting worse over the past three weeks. The receptionist schedules Abigail for an emergency exam. When Abigail arrives, Dr. Foerster instructs his dental assistant to take a panoramic film.
What is Abigail’s diagnosis and what is the typical treatment?
CASE 2: EDWARD, 47
Cavities
Today, Edward is here for his routine cleaning, x-rays and check-up. Upon reviewing his health history and asking if there are any problems we should be aware of, Edwards tells you that he has been having some sensitivity to sweet foods on his upper right and left sides. Below are his bitewing x-rays.
Based on his symptoms and the x-rays, what is Ed’s diagnosis today?
CASE 3: MONICA, 31
Periapical abscess from trauma, root canal to kill the nerve.
This morning, Monica left a message on the emergency service that she had been hit in the face over the weekend and is in extreme pain. We called Monica first thing and asked her to come into the office so we could take a look. She points to the front of her face that exhibits some swelling. The assistant takes a periapical film of the area.
Based on the x-rays, what is Monica’s diagnosis and how will we treat her today?
Conclusion
This concludes the interactive portion for this unit. When you feel you are ready, please take the exam. The answer sheet is in the folder for the exam. Please follow the directions carefully.
Contact me if you have any questions.
