Another thing to consider, that most people won't even bother to ask their doctor, is the materials used to fix a hernia - the stuff left inside the body after the surgery is performed, to be left inside the body forever.
For the most part:
A "pure tissue repair"
will leave sutures behind. Surgical stainless steel sutures which contain nickel (!), or polypropylene sutures (which is one of the healthiest plastics) which are likely more biocompatible but less strong than the steel sutures. Steel is easier *for the surgeon* to work with, so he might prefer steel for *his* benefit. Steel is stronger, but nickle is carcinogenic and has a very high rate of allergy development in people. Nickel allergies can develop after exposure to other nickel sources such as jewelry or coins.
A "patch repair"
typically uses a patch made of polypropylene.
IMPORTANT!: some surgeons still use PTFE (teflon) (!) patches - yes, the stuff your non-stick cookware is made of. Teflon is a big no-no here on Curezone, especially for something implanted into your body that you will have inside you, forever.