Can you recommend any best cream for scars

creams for scars :
- Mederma
- Advanced Scar Gel
How to get rid of old scars ?
- first , you have to consult a dermatology doctor to do the needed medical tests and determine the best treatment pathway
- the suitable treatment depend on the type and depth of the scar , but usually the options are :
1. skin peeling and healing medications such as hydroquinone , vitamin A , retein-A 
2. laser treatment 
3. surgical treatment ( skin graft )
Are those options effective ?
those medical options are the most useful option to treat old scar , with knowing that impossible to get back the old skin appearance , and in most cases , it will only get back 80% of its natural look
What is the needed medical tests :
physical examination and imaging test if the scar is deep