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Debiprasad Ghatak, Krishan Kumar Tyagi, Eshna Tiwari. Implant placement in posterior atrophic maxilla using direct and indirect sinus augmentation- a comparative study. APJHS [Internet]. 2017Mar.30 [cited 2024Dec.22];4(1):201-16. Available from: https://apjhs.com/index.php/apjhs/article/view/198