The study aimed to compare between dynamic implant valve (DIVA) and the crestal ballooning techniques in elevating the maxillary sinus membrane (MSM) in conjunction with simultaneous implantation. Patients and methods: 20-patient prospective clinical cohort study. Ages ranged from 42 to 53 years, and had atrophic edentulous maxillae in the posterior region. To determine maxillary sinus status, patients were investigated utilizing intraoral clinical photographs and CBCT series. Closed Sinus Lifting done and compared between DIVA and ballooning techniques on patients who were randomly separated into two equal groups. The predicted research variables were intraoperative primary stability and level of sinus membrane lift. The main outcome factors were secondary implant Osseointegration stability (ISQ) and the amount of bone height gain. Results: Before surgery, the DIVA and Balloon groups had mean bone heights of 5.8 ± 0.67mm and 6.8 ± 0.86mm , which increased significantly to 12.8± 0.53 and 10.8± 0.67 after 6 months postoperatively. ISQ for DIVA and Balloon groups were 39.0± 2.16 and 40.0±2.16 preoperatively, respectively, and increased to 71.7±1.60 and 70.4±1.27 nine months postoperatively which was significantly higher at 3 months in DIVA group.