Hydraulic Pressure Lateral Sinus Lift Approach

Inclusion Criteria: * The study included patient with deficient posterior maxilla with less than 6mm of bone height confirmed by a pre-operative tomographic scan. All healthy (ASA I, II) non- smoker patients were eligible for the study. The absence of uncontrolled diabetes, systemic illnesses, sinusitis, immune deficiency disorders, were also required for inclusion. Exclusion Criteria: * Patients with sinus infection, neoplasm or a large cyst of the sinus, or those who previously underwent a Caldwell-Luc surgery for the same surgical site were excluded