Kathleen Trottiertrott104@canton.eduEDU300-Prof.YuJuly 22, 2011 UNIT 1 RADIOGRAPHIC INTERPRETATION
Objectives At the end of this unit the student will: Identify normal anatomical landmarks Identify carious lesions and dental disease on an x-ray Relate radiographic findings with dental patient symptoms
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 anddefinitions have been defined in previous chapters and in the one for this unit. This is for visual and further understanding.
Bitewing RadiographDepicts posterior molars and premolars biting togetherused to detect early to advanced dental cavities
Normal Anatomy Normal Anatomy on the Panoramic Radiograph Glenoid FossaCondyle Orbit Nasal Septum Hard Palate Maxillary Tuberosity Maxillary TuberosityInternal Oblique Ridge Mandibular Canal External Oblique Ridge Border of Mandible Sub-Mandibular Fossa Mental Foramen Lingual Foramen Collar Bone Collar Bone
Normal AnatomyBone Bone Bone Nerve Enamel 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 thisx-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 tooth White or composite fillings are less bright than crowns or silver amalgam fillingsSilver or Amalgam fillings arebright white areas usually onlyappearing on one part of thetooth
More Restorative Materials To replace teeth that have been lost, patients often opts for permanent implants or fixed bridgesRoot canals are seen on x-rayswhen the nerve of the tooth isbright white
Identify The Material 1. Implant 3 2. Root Canal 2 3. White Filling 4. Silver Filling1 5. Bridge 4 5
Other Abnormalities Dental calculus appears as white wing-like projectionsGrey areas surrounding the root(s) of a tooth aretermed periapical radiolucencies or lesions.These are indicative that the nerve is infectedeither from decay or trauma or bacteria.
Wisdom Teeth Wisdom teeth are difficult to see on bitewing or periapical films so apanoramic is often necessary to determine whether they should be takenout or left alone. The highlighted areas show impacted third molars in the lower jaw.
CASE STUDIES Using your textbook and the notes provided, determine the most likelydiagnosis 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. Continue
CASE 1: ABIGAIL, 18This morning, Abigail’s mother called the office stating that her daughteris having pain in her jaw that has been getting worse over the past threeweeks. The receptionist schedules Abigail for an emergency exam.When Abigail arrives, Dr. Foerster instructs his dental assistant to take apanoramic film. What is Abigail’s diagnosis and what is the typical treatment? Impacted third molars and Extraction
CASE 2: EDWARD, 47Today, Edward is here for his routine cleaning, x-rays and check-up. Upon reviewing his health history and asking if there are anyproblems we should be aware of, Edwards tells you that he hasbeen having some sensitivity to sweet foods on his upper right andleft sides. Below are his bitewing x-rays. Based on his symptoms and the x-rays, what is Ed’s diagnosis today? Cavities
CASE 3: MONICA, 31This morning, Monica left a message on the emergency servicethat she had been hit in the face over the weekend and is inextreme pain. We called Monica first thing and asked her to comeinto the office so we could take a look. She points to the front ofher face that exhibits some swelling. The assistant takes aperiapical film of the area. Based on the x-rays, what is Monica’s diagnosis and how will we treat her today? Periapical abscess from trauma, root canal to kill the nerve.
ConclusionThis concludes the interactive portion for this unit. When you feel you are ready, please take the exam. Theanswer sheet is in the folder for the exam. Please follow the directions carefully. Contact me if you have any questions.