resorption from AP. dd of AP

Question 1

Periforaminal and foraminal resorptions were present 
in 87.3 and 83.2% of roots associated with periapical lesions 


Answer 1

Vier & Figueiredo(2002)

Question 2

The differential diagnosis of periapical pathologies is confirmed only by means of histological processing

Answer 2

Linenberg et al. 1964

Question 3

Cystic lesions accounted for 20.0% of periapical lesions

Answer 3

Vier & Figueiredo(2004)

Question 4

Cystic lesions accounted for 24.5% of chronic periapical lesions 


Answer 4

Vier & Figueiredo(2002)

Question 5

The majority of chronic periapical lesions (84.3%), 
whether cystic (20.6%) or noncystic (63.7%), had large collections of acute inflammatory cells 


Answer 5

Vier & Figueiredo(2002)

Question 6

No correlation was found between the radiological diagnosis of a cystic lesion as defined in this study and the histological diagnosis of a cyst
Dx of pa lesion can not be made solely on radiograph. Histological examination required.

Answer 6

Ricucci et al 2006

Question 7

Cystic lesions have been reported to account for between 3.2% (Nair 1987) and 54% (Priebe et al. 1954) of apical lesions, and granulomas for between 45% (Lalonde & Luebke 1968) and 96.8% (Nair 1987).

Answer 7

Vier & Figueiredo 2002

Question 8

Nair 1996. prevalence of dd pa

Answer 8

The 256 periapical lesions revealed: 
•	35% were periapical abscesses
•	50% were periapical granulomas
•	15% were periapical cyst 
o	9% true cyst
o	6% pocket cyst

Question 9

Peraipical repair by dense fibrous connective tissue following conservative endodontic therapy

Answer 9

Penick 1961