熱壓法制備濃縮生長(zhǎng)因子屏障膜
[Abstract]:OBJECTIVE: Concentrated growth factor (CGF) is a new generation of plasma extract invented by Sacco in 2006 to promote soft and hard tissue repair. It mainly provides growth factors for tissue engineering. But membrane-like CGF can not act as a qualified barrier membrane in induced bone regeneration surgery because CGF can not be degraded within two weeks in vivo. In order to provide enough time and space for GBR, this study improved the solubility of membranous CGF by hot pressing technology, and proved whether it can act as a qualified barrier membrane through animal experiments, providing experimental basis for the next corresponding clinical treatment. A hot-pressed CGF was prepared by adding ultraviolet-disinfected vinylidene dioxide film (microwave oven film) to two hot irons with set temperature and pressing for a period of time. Group A1, group B1, group C1, group C1, group D1, group D1, group C1, group C1, group C1, group C1, group D1, group D1, group D1, group C1, group B1, group B1, group B1, group C1, group C1, group D1, group D1, group D1, group CGF, group A1 (untreated group CGF), group A1, group A1 (untreated group CGF), group A1, group A1 (untreated group CGF), group A1 (untreated group Twelve rabbits were divided into four groups by in vivo degradation test. After general anesthesia, CGF membranes were implanted into abdomen and hot-pressed CGF were sacrificed at week 1, 2, 3 and 4, respectively. CGF membranes were taken together with adjacent connective tissue and stained with HE and Masson. Sexual experiment: Six male volunteers collected five samples on the same day. Control group A2 (heating at 90 for 2 seconds) group B2 (heating at 90 for 5 seconds) group C2 (heating at 90 for 10 seconds) group D2 (heating at 120 for 2 seconds) were put into a centrifugal tube and added to a 5 ml alpha-MEM culture medium in a 37 C thermostat to release the growth factor. The data were analyzed by one-way ANOVA and further compared by Tukey HSD test. P 0.05 was statistically significant. Part IV GBR operation: 8 New Zealand white rabbits were centrifuged from jugular vein. After general anesthesia, the epidermal muscles and periosteum were dissected by sagittal incision along the scalp for 4 cm. 6 mm diameter trephine was used to prepare 6 mm bone defect symmetrically on the left and right sides. After 6 weeks, the animals were euthanized. The skulls were separated by dental high-speed mobile phone and fixed with 4% paraformaldehyde. All the data were entered into SPSS 22.0 for analysis. The skulls were then fixed with 4% paraformaldehyde. The factor variance analysis and Tukey HSD test showed that there was a significant difference between the two groups. Results: 1. The CGF films prepared by hot pressing changed from yellowish to white with the increase of heating temperature and time, and the CGF films changed from yellowish to white with the increase of heating temperature and heating temperature. The degradation time of CGF membrane in vitro was different between control group and experimental group A1, group B1, group C1, and group D1. In vivo degradation experiment: CGF membrane was completely degraded within 2 weeks in vivo, and the biocompatibility of CGF membrane could be maintained for more than 3 weeks after hot pressing treatment. There was no loss. 3 There was significant difference between the control group and the experimental group at each time point. Both the experimental group and the control group released a lot of growth factors on the first day. PDGF-AB equivalent to 45.00% of normal CGF and 47.6% of TGF-beta.90 6550 In the control group, there were active osteogenesis in the defect area, and osteogenesis in the defect area and far away from the defect, but a large number of connective tissue invaded the collagen membrane in the defect area. New bone formation can be seen. Calcified bone formation can be observed far from the surgical boundary. Osteoclasts wrapped around the graft material can be observed in the vacuole of the graft material. Thin woven bone around the graft material can be seen to form blood vessels. The fibrous connective tissue invasion is less in the hot pressing group than in the blank group, and can be seen at the surgical boundary and far away from the surgical boundary. The formation of calcified bone tissue was observed at the site of the graft, and a large amount of osteogenic activity was observed around the graft material. The formation of trabecular braided bone was observed. Conclusion: 1 Hot pressing CGF can significantly prolong the degradation time of CGF; 2 Hot pressing CGF has good biocompatibility; 3 Hot pressing CGF has good biocompatibility; 4 Hot pressing CGF can act as a barrier membrane in GBR surgery.
【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】:2017
【分類號(hào)】:R783.1
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