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Well outside of the long term consequences, because that is hard to determine, there are a couple things at this time that are important and need to be addressed. First of all, any time a sinus exposure happens whether it was by an implant or a tooth extraction the area needs to be closed to the oral environment and you should be on an antibiotic regime. That is typical protocol with this type of complication. The other thing that needs to be addressed is if this implant is going to be removed or your dentist is going to "wait and see" to determine if it osseo integrates and should stay in place. My advice to you is, you should see a oral surgeon for evaluation and not just your dentist. Does this make sense?