Radiology II Flashcards
What is included in a full mouth radiographic survey?
14 periapicals and 4 bitewings
What is shown in a periapical radiograph?
periapical views should show the crown and 2-3 mm of surrounding bone
What are bitewings used for?
Carie detection. Interproximal spaces must be visible and distinct.
What can happen to the pulp chamber with age?
it can shrink and become obliterated.
Pulp stones may be associated with what?
aging or parafunciton activity (irregular occlusal activity)
What are periapical lesions?
Lesions at the apex of the tooth. Lesionas are a result of pulp death.
What are periodontal lesions?
related to the supporting structure of the tooth: alveolar bone(1-2 mm below CEJ), lamina dura, PDL.
Simple periapical lesions
- rarefying osteitis
- condensing osteitis
- idiopathic osteosclerosis
- hypercementosis
- periapical cemental dysplacia
- cementoblastoma
Describe lesions associated with pulp death
- earliest sign is widening of PDL space
- periapical radiolucency signaling abcess, granuloma, or cyst ( can’t differentiate without biopsy)
- sclerosing osteitis
Describe a periapical abscess
- diffusion at borders- may see sinus tract
- lamina dura lost at the apex
- patient may complain of “gum boil”
What feature is more common in periapical ganuloma?
Radiolucency appears more circumscribed
What features differentiate a periapical cyst?
- well circumscribed
- epithelium comes from Rests of Malssez
- May have a sclerotic or corticated border
Is it possible that the radiolucency is a result of former treatement?
Yes, it is important to determine the nature of the radiolucency. Lesions, such as those from endodontic treatment, may heal with “scar” tissue.
What are the common features of sclerosing osteitis?
- diffuse radiopacity at apex
- widened PDL space
- common in mandibular first molars of young adults
Lesions that are not associated with pulp death (tooth is vital)
- idiopathic osteosclerosis
- hypercementosis
- periapical cemental dysplasia
- cementoblastoma
