Ding, Binhua, Kang Wu, and Feng Chen. “Study on the Osteogenic Effects of Yuliang Collagen Implantation Without Bone Grafting at 6–9 Mm from the Maxillary Sinus Floor: A Prospective Cohort Study”. World Scientific Research Journal 12, no. 1 (January 19, 2026): 6–11. Accessed September 21, 2026. https://wsr-j.org/index.php/ojs/article/view/68.