Significantly more intra - and postoperative complications occurred at both mandibular and maxillary grafted sites : 16 augmented patients were affected by complications versus 8 patients treated with short implants in the mandible ( P = 0.022 ; difference in proportion = 0.40 ; CI 95 % 0.12 to 0.68 ) , and 5 sinus-lifted patients versus none treated with maxillary short implants ( P = 0.047 ; difference in proportion = 0.25 ; CI 95 % 0.06 to 0.44 ) .
