不同粘结剂对种植体周围龈沟液pH值影响的临床研究

Clinical trial of effects of different cements on the pH of peri-implant crevicular fluid

目的观察树脂加强型玻璃离子水门汀和自粘结树脂水门汀对龈沟液pH值的影响。方法将粘结固位种植义齿修复患者15例(30颗种植体)随机分为对照组15例(15颗种植体)和试验组15例(15颗种植体)。对照组予以自粘结树脂水门汀;试验组予以树脂加强型玻璃离子水门汀。另选牙周健康的天然牙患者15例为空白组,每例1颗。于固位前和固位后6,12个月时,比较3组患者的龈沟液pH值和改良菌斑指数。结果固位前和固位后6,12个月,试验组的龈沟液pH值分别为(7.19±0.47),(7.30±0.51),(7.38±0.55),改良菌斑指数分别为(0.43±0.35),(0.51±0.36),(0.54±0.45);对照组的龈沟液pH值分别为(7.20±0.55),(7.39±0.48),(7.85±0.53),改良菌斑指数分别为(0.42±0.41),(0.53±0.45),(0.92±0.59);空白组的龈沟液pH值分别为(7.21±0.52),(7.22±0.55),(7.29±0.49),改良菌斑指数分别为(0.44±0.35),(0.48±0.25),(0.50±0.46)。固位后12个月,试验组和空白组的龈沟液pH值和改良菌斑指数与对照组比较,差异均有统计学意义(P<0.05)。改良菌斑指数与龈沟液pH值存在正相关关系。结论树脂加强型玻璃离子水门汀对种植体周围龈沟液pH值的影响较小。

Objective To investigate the influence of two kinds of different cements（resin-reinforced glass ionomer and self-adhesive resin cement） to the pH of peri-implant crevicular fluid of cement retained implant restorations.Methods About 15 patients for cement retained implant restorations with a total of 30 dental implants were chosen for study.The implants were randomly divided into two groups,treatment group for the resin-reinforced glass ionomer,and control group for the self-adhesive resin cement,with 15 implants in each group.Another 15 patients were chosen to observe 1 healthy tooth and periodonatal tissue from each of them as blank group.The pH of peri-implant crevicular fluid and meliorate plaque index were measured respectively before the crowns were bonded,after 6 months and 12 months.The measured results during different periods were compared.Results Before the crowns were bonded,after 6 months and 12 months the pH of peri-implant crevicular fluid of treatment group were（7.19 ± 0.47）,（7.30 ± 0.51）,（7.38 ± 0.55）,meliorate plaque index were（0.43 ± 0.35）,（0.51 ±0.36）,（0.54 ± 0.45）;the pH of peri-implant crevicular fluid of control group were（7.20 ±0.55）,（7.39 ±0.48）,（7.85 ± 0.53）,meliorate plaque index were（0.42 ±0.41）,（0.53 ±0.45）,（0.92 ±0.59）;the pH of gingival crevicular fluid of blank group were（7.21 ±0.52）,（7.22 ± 0.55）,（7.29 ± 0.49）,meliorate plaque index were（0.44 ± 0.35）,（0.48 ± 0.25）,（0.50 ±0.46）.Tweleve months after the crowns were bonded,pH of gingival crevicular fluid and meliorate plaque index in control group were significantly higher than that in treatment group and blank group.There was a positive correlativity between meliorate plaque index and pH of gingival crevicular fluid.Conclusion Resin-reinforced glass ionomer has less effect on the pH of peri-implant crevicular fluid.