正畸—牙周聯(lián)合治療中重度牙周炎早期齦溝液骨鈣素水平的研究
[Abstract]:In addition to plaque microorganisms, local stimulants and autoimmune reactions, excessive occlusal force, abnormal occlusal force direction, early contact, uneven arrangement of teeth and other occlusal problems can aggravate the destruction of periodontal tissue. When periodontal tissue is destroyed, alveolar bone height is reduced, periodontal support is insufficient, teeth, especially anterior teeth, will appear pathological tooth displacement, in which the fan drift of anterior teeth, pathological tooth displacement will further make teeth bear occlusal trauma, forming a vicious circle, resulting in dual psychological and physiological effects on patients. The idea that periodontal disease is caused by bacterial infection has been recognized. In the development of periodontal disease, the body will have a series of immune reactions against pathogenic microorganisms, and at the same time, it will cause pathological changes in local tissues. The products of these changes are shown in the gingival crevicular fluid. Therefore, it is an important aspect of periodontal disease research to find out the signs of periodontitis in the host reaction products, bacterial products and tissue destruction products in the gum crevicular fluid. Osteocalcin is a hormone-like polypeptide produced and secreted by osteoblasts, which can activate preosteoclasts and accelerate the differentiation of bone resorption cells and promote bone resorption rate. it is a specific and sensitive biochemical index that represents the transient change of bone metabolism rate. The level of osteocalcin in gingival crevicular fluid reflects the changes of local alveolar bone and the degree of inflammation. Therefore, through the quantitative analysis of osteocalcin level in gingival crevicular fluid, we can detect the response of periodontal tissue to orthodontic force in patients with periodontitis, and explore the reconstruction of alveolar bone by orthodontic treatment, so as to provide some guidance for clinical treatment. Objective: to study the changes of osteocalcin in gum crevicular fluid after orthodontic treatment in patients with moderate and severe periodontitis, and to provide experimental basis for monitoring periodontal tissue response in the early stage of orthodontic treatment by detecting the clinical indexes of periodontitis in the early stage of orthodontic treatment and the changes of osteocalcin level in gingival crevicular fluid after the first force. Methods: fifteen patients with moderate and severe periodontitis were selected as experimental group. Periodontal clinical indexes (plaque index, gingival crevicular bleeding index, periodontal bag probing depth) were measured before periodontal treatment, before orthodontic treatment and 1 month and 2 months after orthodontic treatment, and osteocalcin levels in gingival crevicular fluid were measured before periodontal treatment, before orthodontic treatment and 1 day, 2 days and 7 days after orthodontic treatment. At the same time, 15 healthy orthodontic patients in the control group were selected. The periodontal clinical indexes were recorded before the orthodontic force, and the osteocalcin level in the gingival crevicular fluid was measured before the orthodontic force, 1 month and 2 months after the orthodontic force. Results: the periodontal test indexes of the experimental group were lower than those before orthodontic treatment (P 0.05), but there was no significant difference between the experimental group and the orthodontic treatment (P 0.05). The osteocalcin level of the experimental group was significantly higher than that before orthodontic treatment (P 0.05), reached the peak at 24 h, and decreased to the pre-orthodontic level at 7 d. The osteocalcin level in the control group increased significantly after adding strength, reached the peak at 24 h and decreased to the pre-loading level on the 7th day, and the change of osteocalcin level in the experimental group was consistent with that in the control group. Conclusion: the concentration of osteocalcin in gingival crevicular fluid can reflect the degree of inflammation in periodontal tissue and participate in the reconstruction of alveolar bone. The treatment of moderate and severe periodontitis by orthodontic and periodontal treatment can improve the periodontal condition of patients, and periodontitis is not aggravated by orthodontic treatment.
【學(xué)位授予單位】:山東大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:R783.5
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