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BACKGROUND Although left bundle-branch block (LBBB) is a known conduction disorder that occurs after transcatheter aortic valve implantation (TAVI), its clinical impact in the Japanese population remains unclear.Methods and ResultsOf the 298 consecutive patients who underwent TAVI from January 2016 to December 2018 in a high-volume center in Japan, 68 with prior or periprocedural permanent pacemaker implantation (PPI), pre-existing LBBB, death during hospitalization, aborted procedure, or incomplete data were excluded. Among the final cohort of 230 patients, new-onset LBBB occurred in 90 (39%) after TAVI and persisted at 1-month follow up in 29 patients (13%; persistent new-onset LBBB, PN-LBBB). On multivariable analysis, self-expandable valve (SEV) use was found to be the only predictor of PN-LBBB (odds ratio 4.39, 95% confidence interval 1.69-11.41, P=0.002). There were no differences between patients with and without PN-LBBB in terms of overall mortality (18.8% vs. 26.0%, log-rank P=0.90) or need for late PPI (4.0% vs. 3.5%, log-rank P=0.74), yet there was an increased re-admission rate for heart failure (HF) in the PN-LBBB group (15.6% vs. 8.0%, log-rank P=0.046) at a median follow up of 431 (interquartile range, 271-733) days. CONCLUSIONS PN-LBBB following TAVI was not associated with mortality or late PPI, but with a higher incidence of HF-related re-hospitalization at the mid-term follow up.When the sinus is enlarged, it may be necessary to elevate the floor of the maxillary sinus using the crestal or lateral approach. This report presents a case where sinus floor elevation was performed using tricalcium phosphate (TCP) plates supported by implant bodies, and only the blood clot was present around the implant bodies. Cone-beam computed tomography images, taken one year after the lateral approach, revealed the presence of a TCP-like radio-opacity, which almost disappeared after two years. About seven years after the surgery, the patient's superstructure and occlusion were stable. Furthermore, the grafted TCP was completely absorbed, and the implant body appeared to be in good condition, with no signs of bone resorption around the implant.Polypharmacy in elderly persons living at home or in a nursing home is an issue. In the field of dentistry, strategies to reduce polypharmacy must be promoted; however, there is insufficient basic data on medications received by elderly persons with dysphagia living at home or in a nursing home. The subjects were 106 elderly persons with dysphagia living at home or in a nursing home. Based on their medical records, the presence of disease and number/type of drugs being administered were investigated. Stroke, dementia, and hypertension were common. The mean number of drugs per person was 6.3 (minimum 0, maximum 15). Drugs for digestive ulcers were the most frequently prescribed medication, followed by hypotensive drugs, anti-parkinsonism drugs, and other central nervous drugs. Fifty-nine patients (52.8%) had taken drugs that may cause dysphagia, and 19 (17.9%) had taken drugs that may cause aspiration. Of the subjects, 68.9% had taken ≥5 drugs, demonstrating polypharmacy in elderly persons with dysphagia living at home or in a nursing home. Many drugs that may cause dysphagia or aspiration had been prescribed, suggesting the importance of dentists' reducing polypharmacy from the viewpoint of swallowing.Early detection of oral disease is important to reduce its severity and increase the likelihood of successful treatment. This study aimed to perform a quantitative assessment of the saliva components as a first stage of the research to screen oral homeostasis. Here, saliva secretions collected from children were evaluated, and their constituents were analyzed to investigate the potential correlations between the buffering capacity and a range of salivary factors. Subjects aged 3-16 years in the primary, mixed, or permanent dentition stage, were selected for this study. The following salivary factors were analyzed flow rate, total protein, total sugar quantifications, and constituent analyses using RT-PCR and western blotting. The associations between each factor and the buffering capacity were then analyzed using multiple regression analysis. Flow rate, BPIFA2 RNA level, histatin 1 and BPIFB1 protein levels as well as female sex were positively associated with buffering capacity. In contrast, total sugar concentration and MUC7 RNA levels showed a negative relationship with the buffering capacity. Some of these constituents may indicate oral homeostasis and are therefore potential biomarkers of oral health status. These results suggest that the analyses of the correlations between oral homeostasis and salivary factors are an effective strategy for identifying the susceptibility to oral diseases.The present study was done to develop a useful experimental model for analysis of the effects of physiologically active substances on atrophy and regeneration of salivary gland acinar cells. Resection wounds (diameter, 3 mm) were made in the submandibular glands of 8-week-old Wistar rats (n = 24) for histochemical examination on Days 3, 5, 7, 10, 14, and 21 after implantation of a gelatin-based hydrogel sheet. The results showed that the sheet had nearly disappeared by Day 10. Regions around the resection wounds were classified as normal, atrophic, or necrotic. selleck kinase inhibitor In atrophic regions, acinar cells atrophied after resection, and few acinar cells were observed on Day 7. On Days 5-7, striated and granular ducts resembled duct-like structures. On Day 10, newly formed acinar cells were confirmed by increased periodic acid-Schiff staining, and a greater number of mature cells was present thereafter. In necrotic regions, acinar and ductal cells were destroyed, and scattered enucleated acinar cells and duct-like structures were present, on Day 3; newly formed acinar cells were observed on Day 10. Thus, the experimental model demonstrated atrophy and regeneration of the submandibular gland and enabled analysis of the effects of sustained release of physiologically active substances contained within an implanted sheet.
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