The inflammatory paradental cyst: a critical review of 342 cases from a literature survey, including 17 new cases from the author's files.
BACKGROUND
A total of 325 cases of inflammatory paradental cysts (IPCs) and 17 own cases were reviewed. Although known since 1930, the IPC is still unrecognized by many clinicians. The IPCs show a relative frequency of 0.9-4.7%. The majority of cysts occur distally or distobuccally to vital, permanent mandibular molars with a history of pericoronitis (IPC/3rd mandibular molar alone accounts for 64.9%). Radiologically, the cyst appears as a well-defined, semilunar unilocular radiolucency.


METHODS
Cases of inflammatory paradental cysts and related lesions were retrieved from a worldwide literature survey. In addition, 17 new cases from the files of the authors have been added.


RESULTS
The mean ages for patients with IPC/1st, 2nd and 3rd mandibular molars are 8.7, 17.4 and 27.6 years, respectively. The male:female ratio was 1 : 0.9 for IPC/1st and 2nd mandibular molars, and 1 : 0.4 for 3rd mandibular molar.


CONCLUSIONS
Reduced enamel epithelium, cell rests of Malassez and remnants of the dental lamina stimulated by inflammation are thought to play a role in the pathogenesis of IPC. Histological features are indistinguishable from those of the inflammatory, periapical (radicular) cyst.
Philipsen
H P
HP
Edif El Condór, Guadalmina Alta, Spain.
Reichart
P A
PA
Ogawa
I
I
Suei
Y
Y
Takata
T
T
D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008336:Mandibular Diseases / Q000145:classification / Q000453:epidemiology / Q000473:pathology; D008963:Molar; D011842:Radicular Cyst / Q000145:classification / Q000453:epidemiology / Q000473:pathology; D009626:Terminology as Topic