After Dr. Millstein examines the extent of your ACL injury, he will determine if surgery is the best treatment option for you. ACL tears can be partial or complete. For mild partial tears, it is possible that with stretch and strengthening exercises, and often a good knee brace, you can live with a tear. If you find you cannot lead the life wou wish and are unwilling to modify it, then surgery is for you. Surgery is often recommended for very active patients and athletes.