Comparison Between Two Different Design Concepts of 4- Implant Assisted Mandibular Complete Overdenture:- periimplant bone height changes . int.jour.sci.res.mana [Internet]. 2021 Nov. 15 [cited 2024 May 20];9(11):452-6. Available from: https://ijsrm.net/index.php/ijsrm/article/view/2901