Journal of the Korean Association of Oral and Maxillofacial Surgeons
/
v.31
no.1
/
pp.46-54
/
2005
Purpose: This study was performed in order to compare the osseointegration of 4 different surfaced implants in the dog's tibia which has thick dense cortical bone and loose marrow space. Materials & methods: Four mongrel dogs and four different surface types of implants, smooth surfaced AVANA implants, RBM surfaced AVANA implants, HA-coated Steri-Oss implants and SLA Bicon implants, were used in this study. The animals were divided into 4 groups on the basis of implant surface characteristics: Control group, RBM group, HA group, and SLA group. Three implants of each group were installed into the metaphysis of tibia of adult dogs. The animals were sacrificed at 8 weeks after implantation. The undecalcified specimens were prepared for histological examination and histomorphometric analysis of implant-bone contact ratios. Results: Radiographically and histologically good osseointegration of implant was observed in the dense cortical bone, but poor osseointegration was observed in the marrow space. Histologically more bone apposition to implant surface was found in rough surfaced groups than the smooth surfaced, Control group. In histomorphometric findings of cortical bone the average bone-implant contact ratios of HA group (95.4%, p<0.01), RBM group (87.1%, p<0.05), and SLA group (86.0%, p<0.05) were significantly higher than that of Control group (75.9%). In marrow space the average bone-implant contact ratios of HA group (76.1%, p<0.01) and SLA group (45.4%, p<0.05) were significantly higher than that of Control group (29.6%). The ratio of RBM group was higher than that of Control group but there was no significantly difference between RBM group and Control group. Conclusion: These results suggest that the rough surfaced implants can obtain the better osseointegration than the smooth surfaced implant in the cortical and marrow space and that HA-coated implants can obtain the best osseointegration in the marrow space among them.
Moon, Hyung-Sik;Jung, Shin;Jung, Tae-Young;Cao, Van Thang;Moon, Kyung-Sub;Kim, In-Young
Journal of Korean Neurosurgical Society
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v.47
no.1
/
pp.11-16
/
2010
Objective: Abnormalities of the bone are frequently encountered in patients with meningioma, and hyperostosis and endostosis are common bone alterations in these tumors. Extensive bony destruction is very unusual in patients with meningioma. We report six cases of intracranial meningioma associated with an osteolytic lesion of the skull and discuss the underlying mechanisms that may be responsible for bone destruction in patients with meningioma. Methods: Six patients were classified into three groups, severe, moderate and mild, according to the degree of osteolytic bony destruction. The tumor was classified as intracranial or extracranial, depending on its location. We investigated the potential role of matrix metalloproteinase (MMP) in meningioma-associated osteolysis. The levels of MMP expression were determined by gelatin zymography, reverse transcription-quantitative PCR analysis (RT-PCR) and immunohistochemical analysis. Results: Complete surgical removal of the lesion was performed in each patient. Histological examination revealed benign meningioma in four cases, and two cases of atypical meningioma. Patients did not have a poor prognosis except one case of recurred atypical meningioma. Gelatin zymography and RT-PCR detected high levels of MMP-2 in almost all extracranial masses in comparison with the intracranial masses and MMP9 in two. There was no difference in the severity of bone destruction. Immunohistochemical analysis revealed MMP-2 expression in the vicinity of the bone destruction, and a few MMP-9-positive stainings were observed. Conclusion: Osteolysis of the skull in patients with meningiomas might not be indicative of malignant pathological features and poor prognosis. Invasion to the extracranial portion and osteolysis might be associated with MMP-2 expression in meningioma.
A 3-year-old intact female hedgehog (Atelerix albiventris) was presented for evaluation of mandibular swelling. Fine needle aspiration of swollen mandibular was performed and smears were stained with Romanowsky type stain for cytological evaluation. Smears were highly cellular with predominance of variably shaped keratinized or non keratinized squamous cells with low numbers of spindloid to abnormally elongated cells. Cytologic impression was squamous cell carcinoma. The mass was surgically removed for histological examination. Microscopically tortuous and anastomosing delicate to broad pegs and nests of neoplastic squamous epithelial cells were supported by a moderate collagenous and spindloid fibroblast stroma. Tumor cells had moderate anisocytosis and mild anisokaryosis and range from moderately to well keratinized, with areas of intratumoral acantholysis accompanied by mixed stromal lymphoplasmacytic, neutrophilic inflammation. The mitotic index is 2-3 per high-power field. Tumor cells were expanding the subcutis subjacent to the layer of skeletal muscle and incorporating the osseous tissue fragments. The final diagnosis was squamous cell carcinoma. The patient survived three months after surgery without any further medical treatments.
The purpose of this research was to investigate the efficacy of Goiwhasan extract powder on the gastric injuries, antiulcer, gastrointestinal tract and blood hemostasis. Animals were used through this studies mice and rats. All animals were divided into 3 groups, contol group(no treatment), sample Ⅰ group(375mg/kg administration), sample Ⅱ group(750mg/kg administration). The gastric injuries and ulcer have been made by using pyloric ligation, indomethacin, HCI-ethanol, acetic acid and then The histological observation was followed. In the gastrointestinal tract, gastric juice secretion, gastric acidity, pepsin output, blood gastrin and secretin level, transport potentials in the small and large intestine were checked. And studies on blood hemostasis were performed on normal hemostatic activities and plasma prothrombin time, plasma recalcification time, plasma fibrinogen levels in the hypoprothrombinemic mice induced by warfarin. The results were as follows: 1. The antigastric ulcer effects on the pyloric ligation, indomethacin, HCl-ethanol, acetic acid induced gastric injuries were shown in Sample Ⅱ group(p<0.05). 2. Through the morphologic examination on the acetic acid induced ulcer, Sample Ⅰ group showed mild regeneration of epithelium and slight decrease of periulcer edema then that of Control group, while Sample Ⅱ group showed more retraction of round ulcer site, remarkable loss of swelling and edema then that of Control group, and revealing the regenerated epithelium in the surrounding ulcer site. Thus it was noted that both Sample groups have antigastriculcer effects on the experimentally induced gastric ulcer. 3. The inhibitory effects on gastric juice were noted in both Sample Ⅰ group(p<0.05) and Sample Ⅱ group(p<0.01). However, only Sample Ⅱ group showed the inhibitory effects on total acidity and pepsin output(p<0.05). 4. The significant inhibition of blood gastrin level showed at 30 min.(P<0.05) and 90 min.(P<0.05) after starting medication in only Sample Ⅱ group, but significance of blood secretin level in both groups was not recognized. 5. Any significant changes in barium sulfate transport in the small intestine of mice was not recognized in both groups, but the significantly inhibitory effect in large intestine was recognized in both Sample Ⅰ group(p<0.05) and Sample Ⅱ group(p<0.001). 6. In hemostatic effect on both normal mice and hypoprothrombinemic mice induced by warfarin, the significantly shortening effect on coagulation time was seen in only Sample Ⅱ group(p<0.01). 7. On plasma prothrombin time in hypoprothrombinemic rat induced by warfarin, Sample Ⅱ group have shortened the prothrombin time significantly(p<0.001). 8. On plasma reclcification time in hypoprothrombinemic rat induced by warfarin, the recalcification time have been shortened significantly in both Sample Ⅰ group(p<0.05) and Sample Ⅱ group(p<0.01). 9. On plasma fibrinogen levels in hypoprothrombinemic rat induced by warfarin, the fibrinogen contents in Sample Ⅱ have been decreased significantly(p<0.01). Overall the above results suggest that Goiwhasan has an therapeutic efficacy on antigastric ulcer and blood hemostasis. Further studies would be needed on the interaction of its herbal medicine and its mechanism in the future.
Shin Dong Woo;Hyung Woo Jin;Noh Sung Hoon;Min Jin Sik
Journal of Gastric Cancer
/
v.1
no.2
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pp.106-112
/
2001
Purpose: Even with excellent surgical outcome, recurrence of early gastric cancer (EGC) after a curative resection is not declining because the incidence of EGC is increasing. The aim of this study was to propose an appropriate treatment strategy by assessing the risk factors for recurrence of curatively resected early gastric cancer. Materials and Methods: Of 3662 patients who had undergone gastric resections for gastric cancer from 1987 to 1996, the cases of 1050 curatively resected EGC patients were reviewed retrospectively. Among those 1050 patients, 50 patients ($4.8\%$) were diagnosed as having recurrent cancer, which was confirmed by clinico-radiological examination or re-operation. The risk factors that determined the recurrence patterns were investigated by using univariate and multivariate analyses. Results: The mean time to recurrence was 30.9 months, and hematogenous recurrence was the most frequent type ($32.0\%$). Among the 50 recurred patients, peritoneal recurrence showed the shortest mean time to recurrence ($18.5\pm17.7$months). Between the recurred and the non-recurred patients, there was no statistically significant difference with respect to age, sex, operation type, tumor size, tumor location, gross appearance, or histological differentiation. However, depth of invasion (submucosal invasion) and nodal involvement were significantly different (P<0.001) between the two groups. Using logistic regression analyses, nodal involvement was the only significant risk factor for recurrence in early gastric cancer (P<0.001). The median survival after the recurrence had been diagnosed was 4 months. Conclusion: Although the prognosis for EGC patients is excellent and recurrence of EGC after a curative resection is rare, the time to recurrence and the patterns of recurrence in EGC patients were diverse and unpredictable, and the result after recurrence is dismal. Considering the impact of lymph node metastasis on recurrence of EGC, a systematic lymphadenectomy, rather than limited surgery, should be performed if lymph node involvement is confirmed pre- or intraoperatively. Also if the postoperative pathologic findings reveal lymph node involvement, adjuvant chemotherapy is recommended.
Park, Ji-Young;Park, Chung-Mu;Kim, Jin-Ju;Song, Young-Sun
Journal of the Korean Society of Food Science and Nutrition
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v.37
no.2
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pp.177-183
/
2008
This study aimed to investigate the protective effect of dandelion water extract (DWE) on liver injury induced by D-galactosamine (GalN) in Sprague-Dawley rats. Fifty rats were divided into 5 groups; normal control (C), DWE-control (DWE-C: saline injection after feeding 3% DWE diet), GalN-control (GalN-C: GalN injection after normal diet), DWE I (GalN injection after feeding 1.5% DWE diet), and DWE II (GalN injection after feeding 3% DWE diet). After 2 weeks, the acute hepatitis was induced by GalN (650 mg/kg, i.p.) and 24 hrs later, all rats were sacrificed. The DWE supplement ameliorated the serum alanine and aspartate aminotransferase (AST, ALT) as well as alkaline phosphatase (ALP) and tumor necrosis $factor-{\alpha}\;(TNF-{\alpha})$. Hepatic antioxidative enzyme activities, such as catalase, GSH peroxidase, GSH reductase, and Mn-superoxide dismutase (SOD) were slightly or significantly elevated by the treatment of DWE. Moreover, the histological examination corresponded with these biochemical observations. According to these findings, dandelion could be used as a potential therapeutic material for treating chemically induced acute hepatitis.
According to Bryce and Cranston, prolapse of the laryngeal ventricle is a protrusion of the ventricular mucosa into the laryngeal cavity from inflammatory hyperplasia or edema. This 53 year old female patient was admitted to our hospital March 11, 1977 with the chief complaints of dyspnea and hoarseness. On admission, evaluation of the larynx revealed smooth surfaced round pink-reddish mass protruding bilaterally beneath the false cord. The airway was almost completely obstructed by the tumor mass, but neither ulceration nor infiltration was seen, also no lymphnode was palpable in the neck. Tracheotomy was performed for the relief of dyspnea and biopsy was done endoscopically. Histologic study showed chronic inflammation. On April 2, 1977 laryngofissure was performed under general anesthesia. Laryngeal examination revealed smooth surfaced, plate like, pinkreddish mass protruding bilaterally from both laryngeal ventricles into the laryngeal cavity and extending the whole length of the ventricle antero-posteriorly and touching each other. Biopsy was taken of the mass and the result was non-specific inflammatory hyperplasia of the larynx. Postoperatively, the air way is completely clear of obstruction but mild hoarseness still remains. No recurrent mass is visible in the larynx. In view of the symptoms, operative findings and histological findings, this case is diagnosed as "Prolapse of the laryngeal ventricle". The prolapse of the laryngeal ventricle is a very rare lesion and is reported with review of the literature.
Objectives : The aim of this study was to evaluate the effect of Schizonepeta Spica water extract (SS) on the OVA-induced BLAB/c mice allergic rhinitis model.Methods : Thirty two BALB/c mice were equally assigned to 4 groups; the sham group, the control group, the cetirizine hydrochloride (Cet) treatment group, and the SS treatment group. Sham group was sensitized and challenged with saline, and the other groups were sensitized and challenged with OVA. The dosage of SS was 7.6 mg /kg·day, and Cet was 10 mg/kg·day. Nasal rubbing and sneezing were measured by the behavior observation. The concentrations of IL-1β, IL-10, TNF-α and MIP-2 in the sera of allergic rhinitis model were measured by mouse cytokine/chemokine magnetic bead panel kits. Total IgE and OVA-specific IgE were measured by ELISA method. Epithelial thickness and eosinophil infiltration of nasal septum was investigated by histological examination.Results : The clinical symptoms that increased in control group were significantly reduced in SS-treated group. Serum total IgE and OVA-specific IgE in the SS-treated group were significantly reduced compared to the control group. The concentration of IL-1β, IL-10, TNF-α and MIP-2 in SS-treated group showed a significant reduction compared to the control group. The infiltration of eosinophil into nasal tissues of SS-treated group decreased markedly compared to control group, and thickness of nasal septum in nasal mucosa showed a significant reduction compared to control group.Conclusions : According to the above result, it is suggested that SS may inhibit the early and late phase of allergic rhinitis reaction.
Nam, Hyeon-Hwa;Seo, Yun-Soo;Lee, Ji Hye;Seo, Young Hye;Yang, Sungyu;Moon, Byeong Cheol;Kim, Wook Jin;Nan, Li;Choo, Byung Kil;Kim, Joong-Sun
The Korea Journal of Herbology
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v.35
no.4
/
pp.17-23
/
2020
Objectives : In this study, we investigated the protective effects of Charybdis japonica (C. japonica) water extract on the acute reflux esophagitis in rat models. Methods : Twenty rats were divided into four groups for examination: normal control group (n=6), the reflux esophagitis group (n=6), reflux esophagitis treated with positive control group (ranitidine 40 mg/kg, n=6), reflux esophagitis treated with C. japonica group (100 mg/kg, n=6). All rats fasted for 18 hr and then were induced with reflux esophagitis by a pylorus and forestomach ligation operation. After 4 hr, the rats were sacrificed. The proinflammatory cytokine and proteins expression measured by western bolt assay, and the histopathological analysis of the esophageal mucosa measured by hematoxylin and eosin staining. Results : C. japonica administration significantly was protecting esophageal mucosal damage upon histological analysis of reflux esophagitis in rats. The C. japonica treatment confirmed the protection of the reduction of claudin-5, an evaluation index of the damage of tight junctions in the reflux esophagitis. C. japonica was also found to inhibit the expression of proteins such as COX-2 and TNF-α in the rat esophagus. C. japonica markedly attenuated the activation of NF-κB and phosphorylation of IκBα at the same time. Conclusion : These results indicated that C. japonica suppressed the development of esophagitis through the modulation of inflammation by regulating NF-κB activation. Based on these findings, we concluded that C. japonica can prevent reflux esophagitis.
Effects of dietary fat and tomato on immune functions were investigated using BALB/c mice. Sixty male BALB/c mice weighing 16-17g were divided into two dietary groups. Control group was fed experimental chow (AIN-76 purified diet) supplemented with saturated fat (beef tallow) and unsaturated fat (safflower oil) at 5% level (weight basis), while treatment group was fed chow added with 0.5% (dry matter basis) of tomato (moisture content 95%) for 10 weeks. Organ weights, delayed-type hypersensitivity test, plaque-forming cell test, agglutination test, differential white cell count, and histological examination were performed at 4th, 7th, and 10th week after dietary treatment. Weight of spleen and spleen index of tomato group increased with increasing experimental period. Thymus index of tomato group was significantly higher than that of control group at 7 and 10 weeks (p<0.05). In delayed hypersensitivity test at 4th, 7th, and 10th week after dietary treatment, tomato group showed more significant increase in footpad swelling reaction 24 hr after challenge than control group (p<0.05). In plaque-forming cell test, tomato group fed 7 weeks increased more significantly than control group, while no significant difference was found between two groups at 10 weeks. Agglutination test decreased with increasing experimental period; tomato group at 10 weeks was higher than control group in antibody response to SRBC. In tomato group, Iympocyte percentage was slightly higher than that of control group, and spleen tissue showed active immune reaction caused by severe proliferation of white pulp.
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