Purpose: Selection of the appropriate size of maxillary anterior teeth in complete dentures may be difficult, as there is no universally accepted method that can be used reliably. The aim of this study was to investigate whether there is a relationship between the total mesiodistal width of the six maxillary anterior teeth and the interpterygomaxillary notch distance. Material and Methods: One hundred and ten maxillary impressions were made on dental students (67 women, 43 men; 19 to 22 years old) using stock tray and irreversible hydrocolloid impression material. The mesiodistal width of the six maxillary anterior teeth and the distance of the interpterygomaxillary notch were measured by digital caliper on stone casts (on two separate occasions by two independent observers). The results were analyzed using correlation regression tests. Results: The mean mesiodistal width of the six maxillary anterior teeth was 46.02 (±2.8) mm, and the mean distance of the interpterygomaxillary notch was 42.38 (±3.47) mm. A significant correlation was found between mesiodistal width of the maxillary anterior teeth and the interpterygomaxillary notch distance (p= 0.003; r = 0.28). Standardized coefficient was found to be low (28%) to predict the appropriate size of maxillary anterior teeth. Conclusion: Total mesiodistal width of the maxillary anterior teeth correlated with the distance between pterygomaxillary notches; however, measurement of the interpterygomaxillary notch could not be used for tooth selection reliably due to the low standardized coefficient. Within the limitations of this study, the interpterygomaxillary notch distance is not useful for the selection of six maxillary anterior teeth in edentulous patients. 相似文献
Tumor Biology - Mucosal melanoma (MM) is a rare type of cancer that differs significantly from cutaneous melanoma. In this study, we aimed to evaluate clinical and demographical characteristics,... 相似文献
A 22‐year‐old woman presented to our clinic with a complaint of masses on various parts of her body. A mass on her right forearm had appeared 5 years ago and had enlarged during the past 6 months. Two lesions on the back of her neck had a 3‐year history, one lesion on her eyebrow had a 2‐year history, and one lesion on her left forearm had a 1‐year history. The lesion on her left forearm was discharging purulent material. Dermatologic examination revealed a 15 × 16 mm tumor on the right forearm, 11 × 6 mm and 10 × 5 mm tumors on the back of the neck, and a 20 × 20 mm tumor on the eyebrow; they were flesh‐colored, well‐defined, firm tumors. On her left forearm, there was a 12 × 10 mm, well‐defined, firm, blue–red tumor discharging chalky white granules; purulent material was detected ( Fig. 1 ). Figure 1 Open in figure viewer PowerPoint Firm, blue–red tumor discharging chalky white granules 相似文献
Simvastatin is a hypolipidemic drug which is used to control hypercholesterolemia and to prevent cardiovascular disease. In the current study, the effects of high and low doses of simvastatin treatment on tibia of healthy rats were investigated. Wistar rats were used for the control, 20 mg and 50 mg simvastatin-treated groups. Molecular investigations were performed using Fourier transform infrared spectroscopy. In the bones of the two groups of simvastatin-treated rats, the relative mineral/matrix ratio (p < 0.001), relative carbonate content (p < 0.001), carbonate/amide I ratio (p < 0.001) and crystallinity (p < 0.001) decreased significantly compared to the control group. Low dose of simvastatin treatment is more effective in reducing the relative carbonate content indicating the amount of carbonate substitution for phosphate in the mineral crystal. The olefinic band almost disappeared in the high dose of simvastatin-treated group which implies a decrease in unsaturation and an increase in lipid peroxidation. The higher frequency value and the bandwidth of CH2 asymmetric stretching band for the 50 mg treated group imply more disordered (p < 0.001) and fluid (p < 0.001) membrane structure. Low dose of simvastatin is more effective in strengthening the bone than high dose simvastatin treatment. High dose simvastatin treatment induces lipid peroxidation and changes the lipid composition and concentration, which are known to affect membrane physical properties. 相似文献
The immunomodulatory and antiinflammatory activities of aqueous Urtica dioica extract were investigated for their effect on the mitogenic response of murine splenocytes and nitric oxide production by murine peritoneal macrophages in vitro. It was found that this extract stimulated the proliferation of T-lymphocytes and suppressed NO production in lipopolysaccharide-stimulated macrophages without affecting cell viability. 相似文献
It is controversial to test for urinary tract infection (UTI) in patients with unexplained indirect hyperbilirubinemia in the first 2 weeks of life. We aimed to study the prevalence and significance of UTIs in such neonates who were requiring phototherapy.
Methods
Subjects were 2- to 14-day-old neonates with indirect bilirubin levels above phototherapy limit with no other abnormality in their bilirubinaemia-related etiologic workup. UTI was diagnosed by 2 consecutive positive cultures obtained by catheterisation, documenting growth of >10,000 colonies of the same microorganism with consistent antibiograms. The UTI (+) patients were evaluated by renal ultrasonography (US), and some were followed up for possible recurrent UTI.
Results
262 neonates were included in the study. UTI prevalence was 12.2%, and bacteraemia was 6.2% among UTI (+) patients. The two most common pathogens (81.2%) were Escherichiacoli and Klebsiella. pneumonia. All UTI (+) patients had undergone US, revealing 12.5% pelvicaliectasis, other 12.5% increased renal parenchymal echogenicity, 3.1% concurrent pelvicaliectasis and increased renal parenchymal echogenicity. 53.1% of UTI (+) patients had undergone follow-up, after which 23.5% recurrent UTI were found at the end of a mean of 52 months.
Conclusion
We suggest that the neonates with unexplained pathological jaundice should be tested for possible UTI. Consequently, all newborns with UTI shall be evaluated by the urinary US and followed up for recurrent UTI. 相似文献
The aim of the present study was to investigate effects of resveratrol (RSV) over ovarian hyperstimulation syndrome (OHSS) in rat model.
Materials and Methods
24 female Wistar rats (22 days old) were divided into four groups. Group 1 (control group; n = 6) received 0.1 ml intraperitoneal (IP) saline from days 22–26; group 2 (mild-stimulated group; n = 6) received 10 IU pregnant mare serum gonadotropin (PMSG) on day 24 and 10 IU of hCG 48 h later (day 26); group 3 (OHSS group; n = 6) was given 10 IU of PMSG for 4 consecutive days from day 22 and 30 IU hCG on the fifth day to induce OHSS; group 4 (OHSS + RSV group; n = 6) was treated the same as group 3, but received 60 mg/kg RSV 2 h before PMSG injection for 4 consecutive days and 2 h before the hCG injection on the fifth day.
Results
Weight gain was highest in the OHSS group. Ovarian weights were lower in the treatment group than OHSS group. Peritoneal fluid VEGF levels were lower for RSV group compared to group 2 and 3. Total VEGF immunoreactivity was higher in OHSS group than group 1, 2 and 4.
Conclusion
These results indicate that RSV is beneficial for prevention of OHSS by reducing the increases in body and ovarian weight and VEGF activity. These effects may be mediated by anti-inflammatory, anti-oxidant and anti-angiogenic capacity of RSV. 相似文献
