关键词: 即刻种植, 富血小板纤维蛋白, 骨吸收, 后牙区骨改变

Abstract: Objective: To investigate the bone changes in the posterior region immediately after the use of platelet-rich fibrin(PRF) to fill the interstitial space. Methods: From December 2017 to December 2018, 15 patients were implanted immediately in the posterior region, and 18 implants were implanted. All patients were covered with PRF to cover the gap between the implant and the alveolar bone wall. CT was taken on the day after and 6 months after surgery, and the bone height around the implant and the thickness of the buccal and lingual bone plate were observed on the day after surgery and 6 months after surgery. Results: The heights of the proximal, distal, buccal and lingual bones of the postoperative implants were(2.922±1.305)mm, (1.972±1.853)mm, (2.033±1.838)mm, (1.389±1.590)mm, and cheeks. The thickness of the lingual bone plate was (3.328±1.359) mm and (3.806±1.962) mm respectively. The height of the proximal, middle, buccal and lingual bone of the implant was(2.572±1.619)mm, respectively. (1.617±1.345)mm, (0.972±2.423)mm, (0.722±1.412)mm, and the thickness of the buccal and lingual bone plates were (2.417±1.605)mm and (2.772±1.638)mm, respectively, The height of bone in the near and far was not statistically significant(P>0.05), and the thickness of the buccal and lingual bone plate was statistically significant(P<0.05). Conclusion: The immediate use of PRF in the posterior region is simple, the soft and hard tissue is well healed, and it has good short-term effects.

Key words: immediate, implantation platelet-rich, fibrin bone resorption, posterior teeth bone Change