【摘要】 目的 研究数字化咬合引导牙周夹板对牙周炎松动患牙的固定效果及评估后续临床疗效。方法 采用98%浓硫酸酸蚀聚醚醚酮材料表面0、60、90 s及5 min，扫描电镜观察表面微观形貌，万能测试仪检测力学性能改变，确定最终酸蚀条件。选取2024年3月至2025年9月于南京医科大学附属口腔牙周病科就诊的Ⅲ期牙周炎伴前牙松动患者10例，使用数字化3D打印的咬合就位引导装置及经酸蚀处理的聚醚醚酮牙周夹板进行松动牙固定。记录并比较夹板固定牙位固定前及固定后3、6、12个月牙周袋深度、附着丧失、菌斑指数的变化。结果 根据酸蚀后扫描电镜表面形貌观察及万能测试仪机械强度测试结果确定酸蚀条件为98%浓硫酸酸蚀90 s。与固定前相比，固定后3、6、12个月患者夹板固定牙位牙周袋深度、菌斑指数明显降低(P<0.05)，附着丧失水平无统计学差异(P>0.05)。结论 咬合就位装置引导下的数字化聚醚醚酮牙周夹板固定效果良好，具有临床应用前景。更多还原

【Abstract】 Objective To investigate the fixation efficacy of a digital occlusion-guided periodontal splint for loose teeth with periodontitis and evaluate its subsequent clinical outcomes. Methods The surface of polyetheretherketone(PEEK) material was etched with98% concentrated sulfuric acid for 0,60,90 s,and 5 min,respectively. The surface micromorphology was observed by scanning electron microscopy,and the changes in mechanical properties were measured using a universal testing machine to determine the final etching conditions. Ten patients with periodontitis Stage Ⅲ and anterior tooth loosening who visited Department of Periodontology,The Affiliated Stomatological Hospital of Nanjing Medical University from March 2024 to September 2025 were selected. The loose teeth were fixed using a digitally 3D-printed occlusal positioning guide device and acid-etched PEEK periodontal splints. Periodontal pocket depth,attachment loss,and plaque index of the teeth in the splint fixation area were recorded and compared before splint fixation and at 3rd,6th,and 12th months after fixation. Results Based on the results of scanning electron microscope observation of surface morphology and mechanical strength testing with a universal testing machine after etching,the optimal etching condition was determined as etching with 98% concentrated sulfuric acid for 90 s. At 3rd,6th,and 12th months after fixation,the patients’ periodontal pocket depth and plaque index were significantly lower than those before fixation(P<0.05),while there was no statistically significant difference in clinical attachment loss(P>0.05). Conclusion The digitally fabricated PEEK periodontal splint guided by the occlusal positioning device exhibits favorable clinical fixation effect and holds promising prospects for clinical application.更多还原