Decompression of large periapical cystic lesions.

By Neaverth EJ, Burg HA.

Date: 05/1983
Journal: JOE


to call attention to differences between the marsupialization and decompression, to discuss the pathogenesis of cysts and the potential for healing; to describe a technique of decompression; and to present several case reports that demonstrate this technique.

N= 4 case reports.

When can a lesion be classified as a periapical cyst?

•large radiolucent lesion (200 mm2) •nonvital tooth or teeth associated with the lesion •copious drainage from the canal during root canal therapy

•a cystic cavity encountered during decompression.

Marsupialization “ Partsch operation”

-unroofing the outer wall of the cyst by making a surgical incision, evacuating its contents, and establishing a large permanent opening by suturing the remaining part of the cystic membrane to the mucosal surface around the periphery of the opening.


•a minor surgical procedure and there is no attempt to exteriorize the lesion.

•can last more than a year however leaving the tube in for only several weeks has proved equally effective. of the tube.

Most highlighted Results:

In all the case reports radiographic evidence of osseous healing was shown.


The technique of decompression eliminates the undesirable complications of the conventional technique, and, at the same time, promotes healing.