Gum Line After Apicoectomy, Tooth 9! Help with Healing. Worst Case, Options to Fix?

2nd apicoe, gums were cut and pulled back to fully expose area from tooth 6 - 11. How do I make sure gums heal evenly? Dr. said gums shrink on average .5mm. The silver on crowns (tooth 8,9) was already beginning to show. Are there homeopathic remedies, prescriptions, or exercises that will minimize gum shrinkage? Worried I won't be able to smile anymore. Just spent 13k on plastic surgery & would hate to spend more on new crowns and gumline in 3 months. Plus, horrible experiences w/ EVERY DDS. Options?