yeah these are proven/debatable treatments for deep troubled scars..
the subcision method would require a another set of procedure like laser resurfacing or chemical peels and its like doing a minor surgery on the scar..
and the TCA cross uses a chemical to peel off those scars and then eventually those scars will level off with the rest of the skin right..(feel free to correct me if this is misinformation..)
derma rolling or collagen induction therapy is a fairly new approach
(but this was used years before but just was not mainstream and not really that popular)and this is really a viable alternative from drastic procedures currently available in the market today
-siempre ang mga doctors dli sa sila mu adapt ani kay naa p sila katong mga machines nila na worth millions so kailangan p nila ang ila return of investment..just my 2 cents..
anyways, we really don't know which is which and its best to consult your dermatologist about certain methods for your scars..hehehe