Intro to Radiographic Interpretation Flashcards
At what ages do you usually get your molar teeth? (3)
1st - 6 YO
2nd - 12 YO
3rd - 18 YO
When identifying teeth on a radiograph how should you go about this?
- Firstly identify the erupted and developing permanent teeth
- Then identify the deciduous dentition
Where is a common place for supernumerary teeth?
- Between the central incisors on the midline
What is a mesiodent?
A supernumerary tooth that is between the central incisors on the midline
What are the 3 groups of teeth that are most likely to be congenitally absent?
- Incisors, cuspids and molars
- The last tooth in each one of the 3 groups is most likely to be absent
Supernumerary teeth may look like normal teeth. What is the name for these teeth?
- Supplemental teeth
What is the clinical evaluation report?
- Clinical evaluation of the outcome of each exposure is recorded in accordance with the employers procedures
Where are the 3 common sites for caries?
- Pit and fissure
- Smooth surface
- Secondary/recurrent - under restorations
Where would you find pit and fissure caries? (2)
- Occlusal
- Buccal (may be confused radiographically with occlusal)
Where would you find smooth surface caries? (3)
- Interproximal
- Lingual (may be confused radiographically with occlusal and buccal)
- Root - may be confused with cervical burnout
Where would you find secondary/recurrent caries?
- Under restorations
What are the different methods of diagnosing caries? ( 7 )
- Visual
- Radiography
- Elective temporary tooth separation
- Fibreoptic transillumination
- Electrical methods
- Laser fluorescence
- Calcivis - detects calcium ion loss from demineralising tooth surfaces
What are the visual ways of caries diagnosis? (2)
- Wet
- Dry
What are the 2 types of radiography we can use to diagnose caries?
- Film
- Digital
What does the spread of caries look like radiographically?
Cone shaped - broad at surface of enamel, point deeper, lateral spread on reaching dentine
What is cervical burnout?
- Phenomenon caused by relative lower x-ray absorption on the mesial or distal aspect of teeth, between the edges of the enamel and the adjacent crest of the alveolar ridge. Because of the relative diminished x-ray absorption, these areas appear relatively radiolucent with ill-defined margins. Cervical burnout may mimic root surface caries
What is radiography secondary to?
- Clinical examination and full mouth periodontal assessment
If a periodontal assessment was taken and there was 4-5mm pocketing, what kind of radiograph would you take?
- Horizontal bitewings(long axis of the image is running horizontally - this is the standard)
- Should show you the bone levels
If a periodontal assessment was taken and there was >6mm pocketing, what kind of radiograph would you take?
- Vertical bitewings + periapicals if bone not shown
If the periodontal assessment is irregular what can y ou supplement them with?
- Periapicals
What type of radiograph would you use for suspected perio/endo lesions?
Periapicals
What are the optimal conditions for periodontal radiography? (6)
- If panoramic choose orthogonal projection
- Beam angulation crucial
- Horizontal angle 90 degrees to the line arch (avoid overlap of adjacent teeth)
- Vertical angle 90 degrees to the long axis of the tooth
- Pockets may be difficult to show - consider GP point
- Clinical pocked depth examination crucial
If perio pockets may be difficult to show on a radiograph what might be helpful to use?
- Consider a gutta perca point
