ABSTRACT
SUMMARY: The purpose of this study was to investigate effects of diabetes mellitus (DM) on the alveolar bone with histopathological and immunohistochemical methods. Wistar rats were divided into two groups, control and diabetes group. Control group was fed standard rat chow and drinking water for 8 weeks. Single dose (Streptozotocin) STZ (55 mg/kg), was dissolved in sodium citrate buffer and introduced intraperitoneal injection. Diabetes group and control group were compared in terms of glucose values. The blood glucose concentration in diabetic rats was significantly high (p <0.05). In diabetes group; periodontal membrane and the dilation of blood vessels, hemorrhage has also been a significant increase in inflammatory cells. In the diabetes group, osteonectin showed positive expression in periodontal membrane and showed negative expression in osteocytes of alveolar bone. Osteopontin expression in fibroblast cells and periodontal membrane collagen fibrils was positive, alveolar cells, osteocytes and bone matrix bone was found positive. Diabetes results showed that there formed periodontitis; due to the increase in inflammation inhibiting bone formation delaying the development of early bone cells.
RESUMEN: El objetivo de este estudio fue investigar los efectos de la diabetes mellitus (DM) sobre el hueso alveolar con métodos histopatológicos e inmunohistoquímicos. Las ratas Wistar se dividieron en dos grupos, grupo control y grupo de diabetes. El grupo control fue alimentado con comida estándar y agua potable durante 8 semanas. La dosis única Streptozotocina (STZ) (55 mg/ kg), se disolvió en tampón de citrato de sodio y se introdujo mediante inyección intraperitoneal. El grupo diabetes y el grupo control se compararon en términos de valores de glucosa. La concentración de glucosa en sangre en ratas diabéticas fue significativamente alta (p <0,05). En el grupo diabetes hubo un aumento significativo de la membrana periodontal y dilatación de los vasos sanguíneos y hemorragia, con un aumento significativo de células inflamatorias. En el grupo diabetes, la osteonectina mostró una expresión positiva en la membrana periodontal además se observó expresión negativa en los osteocitos del hueso alveolar. La expresión de osteopontina en fibroblastos y fibrillas de colágeno en membrana periodontal fue positiva, las células alveolares, osteocitos y hueso de la matriz ósea dio positivo. Los resultados de la diabetes mostraron que existía periodontitis, debido al aumento de la inflamación que inhibió la formación ósea retardando el desarrollo de células óseas tempranas.
Subject(s)
Animals , Rats , Alveolar Process/metabolism , Alveolar Process/pathology , Diabetes Mellitus, Experimental/pathology , Blood Glucose , Blotting, Western , Diabetes Mellitus, Experimental/metabolism , Immunohistochemistry , Osteonectin/metabolism , Osteopontin/metabolism , Rats, WistarABSTRACT
OBJECTIVE: The aim of this study was to measure tumor necrosis factor-alpha (TNF-alpha) levels around miniscrews used for anchorage during a 3-month period of canine distalization. METHODS: Sixteen patients (8 boys, 8 girls; mean age, 16.6 +/- 2.4 years) whose upper first premolars were extracted for orthodontic treatment were included in this study. Miniscrews were used as an anchorage unit in canine distalization. Thirty-two (32) miniscrew implants were placed bilaterally in the alveolar bone between the maxillary second premolars and first molars. The treatment, miniscrew, and control groups comprised upper canines, miniscrew implants, and upper first premolars, respectively. Peri-miniscrew implant crevicular fluid and gingival crevicular fluid were obtained before applying force and at 1, 24, and 48 hours, and at 7 and 21 days, and 3 months after applying force. RESULTS: During the 3-month period, the TNF-alpha levels increased significantly at 24 hours only in the treatment group (p < 0.01). In the miniscrew and control groups, there were no statistically significant changes. No significant differences were observed between groups. CONCLUSIONS: Miniscrews can be conveniently used for anchorage in orthodontics.
Subject(s)
Humans , Bicuspid , Gingival Crevicular Fluid , Molar , Orthodontics , Tooth Movement Techniques , Tumor Necrosis Factor-alphaABSTRACT
To investigate the effect of oral treatment of Wistar albino rats with different doses of Nigella sativa L. [NS] powdered seeds on the levels of serum lipids. This study was performed in the Medical Science Application and Research Center of Dicle University; Diyarbakir, Turkey, from February 2003 to December 2008. A total of 75 Wistar albino male rats, 60 of them with NS supplementation and 15 animals acting as controls, were included in the study. The NS groups were divided into 4 main groups of 15 each. Four doses of NS were used [100, 200, 400, and 600mg/kg/day]. Each dose group was further divided into 3 duration subgroups of 5 rats each, the feeding of NS seeds continued for one, 2, and 4 weeks. Control animals were divided into 3 main groups of 5 rats each. The rats were sacrificed at one, 2, and 4 weeks after feeding. Lipid parameters were measured. Rats treated with the 400mg dose for one week's duration showed a significant increase in high-density lipoprotein-cholesterol levels. There was a significant decrease in low density lipoprotein-cholesterol levels after one week for 400 and 600mg doses, and all doses after 2 weeks and 4 weeks for 200 and 600 mg doses when compared to control groups. There was a significant decrease in very low-density lipoprotein-cholesterol levels after one week for 200, 400, and 600 mg doses, and all doses for 2 and 4 weeks. A 400 mg dose for 2 weeks, and all doses for 4 weeks caused a significant decrease in triglyceride levels. There was a significant decrease of total cholesterol levels in all doses after 4 weeks of NS feeding. These results indicate that NS may ameliorate the alteration in the lipid levels caused by diseases or toxic agents