Can you recommend a boston ma md who can provide a second opinion of a patient with a floor orbital fracture with inferior rectus nerve entrapment?

Orbital fracture. If you are in or near boston, contact the hospitals for names of maxillo-facial, ear/nose/throat, plastic, or ophthalmologist surgeons, get name and number, then call starting with ophthalmologist surgeons to see if this is a procedure that they do, and how many.
ASOPRS website. The american society of ophthalmic plastic and reconstructive surgeons (asoprs) website lists physicians with fellowship training in orbital and oculofacial plastic surgery. There are many listed in the boston area, including at mass eye and ear. They have extensive training in eye socket surgery and are ophthalmologists to boot.
Teaching hospital. Try a teaching hospital like mass eye and ear or mass general.