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目的:探讨冠桥固定重症牙周炎松动牙对牙龈微循环和牙周组织影响。方法:选重症牙周炎患者40例,分为2组,对照组用牙周洁治和刮治,固定组在上述基础上作松牙固定,2组患者分别用激光多普勒血流仪测定治疗前、治疗后1周、治疗后3个月GBF,刚果红染色检测龈下菌斑形态学变化,并测定牙龈指数(GI)、菌斑指数(PLI)和牙周袋深度(PD)、附着丧失(AL)。结果:治疗后1周时固定组GBF和GI、PLI、PD、AL及杆菌、螺旋体和梭状菌比率与对照组有显著性差异(P<0.01);在治疗1周时固定组GBF比治疗前明显增加,GI、PLI、PD、AL和杆菌、螺旋体和梭状菌比率明显降低;在治疗3个月时,固定组GBF明显大于1周时,杆菌、螺旋体、梭状菌比率明显低于1周时。结论:冠桥固定重症牙周炎松动牙可使GBF明显增加,改善牙龈微循环,使龈下菌群向非致病型转变,其疗效与调节牙龈微循环和龈下菌群有密切关系。
Objective: To investigate the effects of crown-bridge-fixed loose periodontal ligament on gingival microcirculation and periodontal tissue. Methods: Forty patients with severe periodontitis were selected and divided into two groups. The control group was treated with periodontal cleaning and scraping. The fixed group was fixed with loose teeth on the basis of the above. The two groups were treated with laser Doppler flowmeter The morphological changes of subgingival plaque were detected by GBF and Congo red staining before treatment, 1 week after treatment and 3 months after treatment. Gingival index (GI), plaque index (PLI) and periodontal pocket depth (PD) Loss (AL). Results: The ratio of GBF, GI, PLI, PD, AL, bacillus, spirochetes and Clostridium in the fixed group at 1 week after treatment were significantly different from those in the control group (P <0.01) The ratios of GI, PLI, PD, AL and bacilli, spirochetes and Clostridium were significantly decreased before treatment. At 3 months of treatment, the ratio of Bacillus, Spirochaeta and Clostridium was significantly lower than that of the fixed group when the GBF was significantly longer than 1 week 1 week. CONCLUSION: The crown bridge fixation of loose periodontitis can significantly increase the GBF, improve gingival microcirculation and make the subgingival flora non-pathogenic. The curative effect is closely related to the regulation of gingival microcirculation and subgingival flora.