IRCT20140817018834N9 IRCT 2021-06-12 Mashhad University of Medical Sciences closed sinus lift with and without bone graft Evaluation of clinical and radiographic conditions of implants placed with closed sinus lift technique with and without bone graft 2021-06-15 anticipated 40 Complete https://irct.ir/trial/56016 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: The randomization method will be simple and the Randomization unit will be individual. Randomization take place using www.randomization.com website and random numbers will be inserted in sealed envelopes. on the basis of the number in the envelope (even and odd), the patient will be allocated to the test or control group, Blinding description: As to the study design of the possibility of blinding the participants, there is no principal investigator or clinic staff, and Each person's files and data are made available to the data analyzer and the Outcome assessor without knowing the case group or being in control. 3 The patient needs implant placement followed by a closed sinus lift.. Intervention 1: Intervention group: Bone graft placement is performed concurrently with sinus elevation in a closed method to increase bone thickness and height. Intervention 2: Control group: elevating the sinus lift alone and the simultaneous placement of the implant. No - There is not a plan to make this available Justification or reason for not sharing IPD is there in no more information