You're speaking to Dr. Michael Salkin. Welcome to JustAnswer. I'm currently typing up my reply.
I'm sorry that your question wasn't answered in a timely manner. To better understand if your dog's current lameness is related to her injury 7 years ago, her vet would need to carefully palpate (feel) the affected bones of the injured leg and perform flexion and extension tests on all of the joints in that leg. X-rays would be required to visualize the fracture site and to see if it now involves a joint or, less likely, has become neoplastic (cancerous). Please respond with further questions or concerns if you wish.