Ding, B.; Wu, K.; Chen, F. 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. WSRJ 2026, 12 (1), 6-11. https://doi.org/10.6911/WSRJ.202601_12(1).0002.