Vaginal vault
The vaginal vault is the expanded region of the vaginal canal at the internal end of the vagina.

Prolapse
The vaginal vault may prolapse after a hysterectomy, as there is no uterus supporting the interior end of the vagina. 
Colposacropexy is often used for treating vaginal vault prolapse. A Cochrane Collaboration review[needs update] found that limited data are available on optimal surgical approaches, including the use of transvaginal surgical mesh devices, in the form of a patch or sling, similar to its implementation for abdominal hernia. However, the use of a transvaginal mesh in treating vaginal prolapses is associated with side effects including pain, infection, and organ perforation. According to the FDA, serious complications are "not rare." A number of class action lawsuits have been filed and settled against several manufacturers of TVM devices.

See also
Vagina
Hysterectomy

References
External links
Dictionary definition of "Vaginal vault" from TheFreeDictionary.com