While I have all the respect for Dr.
Liu, I personally wouldn't recommend
PMMA in the glans (if that is indeed what he also offers, which is news to me). I suppose at very low volumes it's achievable but the gains would also be equally negligible (in terms of volume injected). As someone has pointed out previously,
Hyaluronic Acid (
HA) is probably the best bet, and there is no known "glans implant" at this time.
My understanding is that Dr.
Liu uses
PMMA for additional
Girth for those with Alloderm (since Alloderm is typically a
one-and-done type of procedure). If he indeed uses
PMMA for glans enhancement, then that'd be at your discretion. It isn't safety issues that I've seen with
PMMA-glans enhancement in the past, it's more-so aesthetic; any visual irregularities are far more noticeable on the penis head than on the shaft, making permanent options a bit problematic should you have undesirable results. Dr.
Liu is a skilled Surgeon, but this should be noted nonetheless.
Due to the anatomical nature of the glans, permanent materials there may prove challenging, hence why temporary options (like
HA) are your best bet. This is my personal recommendation as someone who has Moderated and followed the surgical Penis Enlargement (PE) scene for nearly two decades (however, I am not a Doctor).