What's the probability of surgery of a high grade tear of the common flexor tendon at its insertion with partial tearing of the ucl and recovery time?

6-8 weeks healing: Is typical for an injury in that part of your elbow along with physical therapy and relative rest. If you are a thrower, gymnast or actively put a great deal of repetitive stress on your elbow surgery might be recommended after conservative treatment. Full thickness tears in the above populations often need surgery

Likely: High grade means complete or nearly complete tear, for which surgery is usually recommended if the reading is in fact accurate. Approximately 6-8 week recovery time.