Is Venlay better or equivalent to jaw/orthognathic surgery? Pros vs cons?

I am 34 m have a 1 cm overbite and am currently in braces getting my teeth aligned before jaw surgery. I came across the venlay procedure. This is a painless procedure which seems to have amazing results. I am not sure how the jaw is moved with porcelain permanently , please somebody explain. What would be the pro's and con's of this compared to jaw or orthognathic surgery? Besides the apparent painless and quick time benefits.

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