Silicone Implant to Get Sharp Tip in Asian Rhinoplasty?

Surgery
with silicone implants is quicker, since they are pre-fabricated and easier to
place than autologous grafts (tissue from your own body), and the recovery may
be a bit easier. The results may also look good for several years,
however they are not a permanent solution. As long as the implant is in
place there will be an associated risk of infection, migration, and extrusion
(coming through the skin) which is higher than that of autologous grafts.

The reason for the lack of permanence is that
synthetic implants never become fully incorporated into your body. Using
tissue from your own body will give you the safest, longest lasting results and
a beautiful nose.

No.  Silicone and Goretex are not the only materials.  Due to the risk of complications associated with artificial materials, I recommend my patients to use rib cartilage graft.  It is true that some patient do not have enough septal cartilage either naturally or due to previous surgery, but everyone has enough ribs.Another very important factor in creating a refined tip in Asian skin is managing the soft tissues.  Asian skins are thicker with require more attention.Most importantly, you must willing to deal with the recovery which could last 1-2 years.  Post-operative management is an important part of any surgery, especially in Asian Rhinoplasty.Best Wishes.

Given the option to use your own tissue, this is a safer route. That said, more consistent and reproducible changes to the dorsal contour and projection can be achieved with an implant. There is always a risk of infection and extrusion, so this must be weighed carefully.

An implant is not the correct way to define the tip in Asian rhinoplasty.  10-20 years ago, this was the procedure that was performed, usually with a small cartilage graft.  Not only is this not safe and can lead to extrusion of the implant, tip definition can be insufficient in many cases, especially when the nose is short.  The appropriate surgery is a combination of an "I" shaped implant (as opposed to the "L" shaped implants that have a columellar portion) and either a columellar strut or septal extension graft.  Often a septal extension graft is needed as the tip can be quite deficient in Asians and in the case of short noses, this surgical technique is essential to support the new tip.  Please seek a board certified surgeon that is experienced in Asian rhinoplasty.

Part of the reason that silicone implants can create a "super sharp" tip is that they exert a tremendous amount of pressure on the skin, and ultimately thin skin.  A great deal of refinement can be achieved with a septal extension graft and shield graft, but the level of "sharpness" will be limited by the thickness of your skin.