Final answer:
Anterior repair involves the use of mesh to correct a cystocele, while posterior repair does not.
Step-by-step explanation:
One of the main differences between anterior and posterior vaginal wall prolapse repair is that anterior repair involves the use of mesh, while posterior repair does not. Anterior repair is performed to correct a cystocele, which is a bulging of the bladder into the vaginal canal. The use of mesh helps provide additional support to the weakened tissue.