Maxfax Imaging Flashcards
How is caries best detected?
Bitewings or long-cone PAs
When can caries be detected?
30-40% demineralisation - allows lesions to be differentiated from normal dentine and enamel
Radiographs and size of carious lesion?
Often 25% larger than seen on radiograph
How is proximal surface caries seen?
Triangular radiolucency below contact point - apex towards ADJ
Spreads rapidly along ADJ
What is sign of occlusal caries?
More difficult to diagnose
Thin radiolucent line at ADJ
Problem with root caries and radiograph?
Cervical burnout can mimic root caries
How to differentiate before cervical burnout and caries?
In cervical burnout still image at root edge
How does recurrent caries present?
A zone of increased radiolucency along margins of a restorations
What are signs of PA pathology?
Early sign - widening PDL and loss of lamina dura
Granulation tissue is attempt of healing - well defined radiolucency at apex
Differentiate PA pathology and radicular cyst?
Radicular cyst likely to be >1cm
Can periodontal disease be detected on radiograph?
No signs of gingivitis
But can be useful in demonstration bone loss in chronic periodontal disease and local factors e.g calculus/ overhanding restorations
Where is alveolar breast in relation to ACJ?
1.5mm of ACJ
What would see radiographically in early, later and complex bone loss?
Early - erosion of interdental crest
Later - horizontal loss or localised defect
Complex - osseous defect
What is germination?
Two teeth joined - arise from single tooth germ
What is concrescence?
Two teeth joined by cementum
