Perioapical Radiolucencies Flashcards
What can be confused for a periapical radiolucency but is actually a superimposition of normal anatomic structures?
- Incisive foramen
- Lateral fossa
- Maxillary sinus
- Mental foramen
- Submandibular gland depression
- Open apices in young patients
ID
incisive foramen
ID
lateral fossa
ID
floor of the maxillary sinus
ID
mental foramen
ID
decreased bone density- posterior mandible
ID
open apices in young patient
ID
floor of the maxillary sinus
radiograph mounted upside down
What are the six lesions that show up as periapical radiolucencies?
- Periapical Abscess
- Periapical Granuloma
- Periapical Cyst
- Residual/Recurrent Cyst
- Periapical Cemento-Osseous Dysplasia
- Fibrous Healing Defect
What are the interpretation of periapical inflammatory lesions?
- Periapical Abscess
- Periapical Granuloma
- Periapical Cyst
What are the acute pulpal/periapical diseases?
- Reversible/irreversible pulpitis
- Acute periapical abscess
What is a periapical abscess?
- PDL space thickening (exude leaving the canal)
- Discontinuity of lamina dura
- Periapical radiolucency
Periodontal ligament space widening at mesial apex of first molar
When does the patient have the most symptoms with a periapical abscess?
PDL space thickening (exude leaving the canal)
What are the chronic periapical inflammatory lesions?
- Chronic periapical abscess
- Periapical granuloma
- Periapical cyst
- Periapical rarefying osteitis
Is this a chronic or acute periapical abscess?
chronic
bc it is ill defined?
What is a periapical granuloma?
associated with a non-vital tooth, composed of inflammatory granulation tissue
- may have thin radiopaque border & external root resorption
How does the periapical granuloma develop?
- starts out as an abscess
- starts out as a periapical granuloma
What is a periapical cyst?
- cystic degeneration of a granuloma resulting in a fluid filled cavity
- vary in size
- develop from a granuloma
What is important to know about abscesses and granulomas?
They can go back and forth between the two types of inflammatory lesions
What is this and what type of inflammatory lesion does it come from?
parulis: draining fistula
- from chronic apical abscess
What is this and what type of inflammatory lesion does it come from?
parulis: draining fistula
- from chronic apical abscess
How to ID source of draining fistula?
gutta percha point
What is a periapical cemento-osseous dysplasia?
- etiology unknown
- mainly involves lower incisors
- 3 stages of development
- self-limiting condition
- middle-aged African American, Asian females
- Single or multiple lesions
- Radiolucent, mixed, radiopaque
- Well-defined margins
- Lamina dura discontinuous
- Larger lesions may expand cortex
- Teeth vital
What are the 3 stages of development for a periapical cemento-osseous dysplasia?
- radiolucent lesion
- fill in with small radiopacities
- becomes mostly radiopaque (thin radiolucent border)
_____ stage of PERIAPICAL CEMENTO-OSSEOUS DYSPLASIA must be differentiated from other radiolucent periapical lesions
Early
What does this show?
fibrous healing defect
non-corticated
What is happening to tooth #30?
apical scar
metastatic carcinoma
looks irregular
