Objective: To observe the clinical effect on site preservation with self platelet-rich fibrin (PRF) in posterior dental areas after extraction.
Methods: Thirty patients who asked to extract posterior teeth and were ready for dental implantation were enrolled. PRF was implanted immediately in alveolar fossa after extraction. Cone beam computer tomography (CBCT) images were taken after 4-6 months and the changes in height and width of alveolar bone were observed.
Results: There was no statistical difference in the height and width between the alveolar bone treated with PRF after the extraction of tooth and the bone condition before the extraction of tooth.
Conclusion: The site preservative technology with PRF could maintain the mass of alveolar bone in posterior dental areas, which provide a better bone condition for later dental implantation.
目的：观察后牙区拔牙同期在拔牙窝内充填自体富血小板纤维蛋白(platelet-rich fibrin，PRF)行位点保存，预防牙槽嵴吸收的临床效果。方法：对30例要求拔除后牙区患牙后作牙种植修复的病例，拔牙后即刻在牙槽窝内充填PRF进行位点保存，4~6个月拍摄锥形束CT(cone beam computer tomography，CBCT)观察牙槽骨宽度和高度的变化。结果：后牙区拔牙同期行PRF位点保存术后牙槽骨的宽度和高度与拔牙前比较，差异无统计学意义(P>0.05)。结论：PRF位点保存技术可以很好地维持后牙区牙槽嵴骨量，为后期的种植提供良好的牙槽骨条件。.