Efficacy of Different Techniques of Crestal Sinus Lifting

Twenty one patients with deficient posterior maxilla and alveolar bone height ≤ 5mm were included.Those patients randomly divided into 3 equal groups:Group 1: 7 patients treated by osteotome closed sinus lift with bone grafting (xenograft) and implant placement.Group 2: 7 patients treated by densah burs(Versah, Jackson, MI, USA) sinus lift with bone grafting (xenograft) and implant placement.Group 3: 7 patients treated by piezoelectric (Piezotome; Satelec) crestal sinus lift with bone grafting (xenograft) and implant placement.

Inclusion Criteria:Young and adult patients of both sexes.Patients exhibit class C residual bone height according to ABC sinus augmentation classification.(18)The edentulous ridges are covered with mucoperiosteum free from signs of inflammation, ulceration or scar tissue.Remaining natural teeth have good periodontal tissue support.Occlusion showing sufficient inter-arch and intra-arch spaces for future prosthesis.Exclusion Criteria:Patients with systemic conditions that could influence the outcome of the therapy as: Pregnancy and Heavy smokersPatients with systemic disease that may affect bone quality.Uncooperative patientsPatients with active periodontal disease.Patients with neglected oral hygiene.Patients with limited mouth opening and unfavorable intermaxillary arch space.Patients with maxillary sinus disease or previous sinus surgery.