Hematoma, postoperative bleeding, edema, early infection, dehiscence, emphysema, air embolism, loss of primary stability of the implant, acute sinusitis, postoperative cutaneous or mucosal anesthesia and loss of central visual field are early postoperative complications. The incidence of early post-operative complication during the first days of postoperative follow-up was inquired. Eleven patients were implanted by 27 DPI implants. The patients were followed up the first day, the second day and the tenth day after the one-phase surgical technique. Dehiscence in 2 patients, edema in 10 patients, hematoma in 2 patient and postoperative bleedings in 3 patients were established. Three implants were removed because loss of primary stability. It is indicated that by proper preoperative and intraoperative as well as postoperative approach it is possible to influence early postoperative complications. Even though postoperative complications are sometimes unavoidable, choosing the most appropriate surgical technique and keeping oral cavity hygiene are the most important factors in prevention. It is concluded that only the loss of primary stability is incorrigible and successes of implanto-prosthetic rehabilitation can be properly and fully evaluated only after 5 to 10 years of follow up period.