Search

This study probed the importance of computed tomography perfusion (CTP) on assessing collateral circulation and prognosis in patients with acute anterior circulation large vessel occlusion (AAC-LVO) after endovascular therapy (EVT). Retrospective analysis was performed on the case data of 124 AAC-LVO patients who achieved EVT in the First People's Hospital of Lianyungang. All patients received computed tomography (CT) examination. Based on the multi-phase computed tomography angiography (mCTA) score, patients were separated into poor collateral circulation group and good collateral circulation group. Based on modified Rankin scale (mRS) score, patients were separated into good prognosis group and poor prognosis group. The receiver operating characteristic (ROC) curve was used to measure the efficacy of CTP parameters in predicting good collateral circulation or good prognosis. Correlation between CTP parameters with mCTA collateral and 90-day mRS circulation score was analyzed using the Spearman correlation analysis. The age and admission national Institutes of Health stroke scale (NIHSS) scores of the good collateral circulation group were lower than the poor collateral circulation group, and low perfusion area volume with Tmax > 6 s (VTmax>6 s), infarct core area volume (VCBF6 s, VCBF6 s and VCBF6 s, VCBF6 s, Alberta Stroke Program Early CT(ASPECT) score, and higher mCTA score. Spearman correlation analysis unveiled that ASPECT score, mCTA score and 90-day mRS were negatively correlated. The final infarct volume, perfusion parameters HIR and VCBF

Abstract Objective: The aim of this population-based retrospective study was to compare the osteogenic effect of newly formed bone after maxillary sinus floor elevation (MSFE) and simultaneous implantation with or without bone grafts by quantitatively analyzing trabecular bone parameters. Methodology: A total of 100 patients with missing posterior maxillary teeth who required MSFE and implantation were included in this study. Patients were divided into two groups: the non-graft group (n=50) and the graft group (n=50). Radiographic parameters were measured using cone beam computed tomography (CBCT), and the quality of newly formed bone was analyzed by assessing trabecular bone parameters using CTAn (CTAnalyzer, SkyScan, Antwerp, Belgium) software. Results: In the selected regions of interest, the non-graft group showed greater bone volume/total volume (BV/TV), bone surface/total volume (BS/TV), trabecular number (Tb. N), and trabecular thickness (Tb. Th) than the graft group (p0.05). Compared to the graft group, the non-graft group showed lower postoperative bone height, gained bone height and apical bone height (p

Abstract Background The purpose of this study was to investigate the socket healing outcome after alveolar ridge preservation at infected molar sites using an erbium-doped yttrium aluminium garnet (Er:YAG) laser. Methods Eighteen patients who needed molar extraction and exhibited signs of infection were included and allocated into either the laser group or the control group. Er:YAG laser irradiation for degranulation and disinfection was performed with alveolar ridge preservation (ARP) in the laser group. Traditional debridement with a curette was performed in the control group. Two months after ARP, bone tissue samples were harvested at the time of implant placement for histological analysis. Assessment of dimension changes in alveolar bone was conducted by superimposing two cone-beam computed tomography (CBCT) scans taken at baseline and two months after extraction. Results Histologically, after two months of healing, Er:YAG laser treatment resulted in more newly formed bone (laser: 17.75 ± 8.75, control: 12.52 ± 4.99, p = 0.232). Moreover, greater osteocalcin (OCN) positive expression and lower runt-related transcription factor 2 (RUNX-2) positive expression were detected in the laser group. However, no statistically significant difference was observed between the two groups. The difference in the vertical resorption of the buccal bone plate was statistically significant between groups (laser: -0.31 ± 0.26 mm, control: -0.97 ± 0.32 mm, p

The study aimed to investigate the head and neck space infection by Gram bacteria using mathematical model-based CT (computer tomography) under e-health (electronic health). Specifically, a total of 180 clinical patients with head and neck space infection were collected as the research subjects. CT/MRI examination was adopted to diagnose the disease. A mathematical model was then established to be applied in CT imaging. The cause and treatment effect were analyzed by summarizing the data, including basic information, bacterial culture, source and extent of infection, serious complications, and other factors. The results showed that the CT/MRI imaging based on the mathematical model can effectively diagnose the disease and assess the disease progress. There were more male patients than female patients with head and neck space infection, and more elderly patients than younger patients. A total of 42 patients had serious complications, accounting for 23.3% of the total patients. The most common one was descending mediastinitis, followed by respiratory obstruction, pneumonia, pericarditis, orbital infection, and multiple organ failure. There were many sources of infection in the head and neck space. The main cause was dental infection, and there were 137 cases, accounting for 76.1% of the total. Among them, odontogenic infections included tooth apical periodontitis, wisdom tooth pericoronitis, and periodontal disease. Other sources of infection included glandular infections, iatrogenic infections, and traumatic foreign bodies. The most common part affected by head and neck space infection was the submandibular space, and other parts included the masseter space, the cheek space, and the sublingual space. Severe complications of head and neck space infection were mainly inferior mediastinitis and respiratory obstruction. In the bacterial culture experiment, a total of 75 bacterial cultures of 180 patients were positive, and 62 strains of bacteria were cultured, including 11 kinds of gram-positive bacteria and 4 kinds of gram-negative bacteria. The main pathogens cultivated were Streptococcus viridans, Staphylococcus aureus, and Klebsiella pneumoniae. In laboratory tests, the values of WBC and hs-CRP in patients with severe complications were significantly higher than those in patients with common head and neck space infection. Imipenem and ornidazole were the most commonly used antibiotics in the clinical treatment of patients with severe complications. In conclusion, head and neck space infection is a serious infectious disease that may be life-threatening and requires timely and effective treatment.