Objective To extract and summarize the clinical registration information of periodontitis registered in the US ClinicalTrials.gov and Chinese Clinical Trial Registry(ChiCTR),and further analyze the registration characteristics of periodontitis clinical trials.Methods The ClinicalTrials.gov and ChiCTR data-bases were searched and compiled for periodontitis clinical registration information from 2000 to December 26,2024,including registration number,country/region of registration,annual number of registered projects,sample size,study type and design,study phase,and trial progress status.Results As of December 26,2024,a total of 520 242 registered clinical trials were retrieved from the ClinicalTrials.gov registry platform,of which 1 542(0.30%)were related to periodontitis.There were 189(12.26%)studies on periodontitis-related pro-jects in Turkey,while a total of 37(2.4%)projects were initiated by researchers in China,which ranked ninth.The Chinese Clinical Trial Register(ChiCTR)had 92 954 registered projects,of which 165 were on pe-riodontitis,and most of them were conducted by well-known affiliated hospitals and stomatology hospitals.The number of registrations in the ClinicalTrials.gov database increased year by year and reached a peak in 2022(146 registrations).Trial designs were focused on interventional and observational studies.ClinicalTri-als.gov study phases were focused on phases 2 and 4,while ChiCTR was clustered at phase 0(pre-registra-tion).Conclusion The number of clinical registrations for periodontitis in China's database is relatively low,and despite a steady upward trend,there is still a gap compared with other countries internationally.Future re-search should focus on how to encourage more oral health related research institutions to register on the plat-form and how to increase the sample size.

Objective To understand the current status of medication compliance in the patients with postherpetic neuralgia (PHN)and its influencing factors.Methods The cross-sectional survey method was adopted to investigate the status quo of medi-cation compliance among PHN patients in the pain clinic of the Southwest Hospital of Army Military Medical University from Janu-ary of 2014 to March of 2015.Then the influence factors of medication compliance were analyzed by using the using the Logistic re-gression method.Results A total of 396 PHN patients were included 52.3% of patients had good medication compliance,while 47.7% had poor compliance.The univariate analysis showed that the age,educational level,marital status,living condition,economic status,degree of pain,disease course,medical insurance reimbursement,adverse drug reactions and complicating other diseases were the factors affecting the medication compliance(P<0.05).The multivariate Logistic regression analysis results showed that the age,educational level,marital status,living condition,economic status,degree of pain,disease course,medical insurance reimburse-ment,adverse drug reactions and complicating other diseases were the factors affecting the medication compliance.Conclusion The medication compliance in the patients with PHN is not high,there are many factors affecting the medication compliance.It is recom-mended to carry out the health education,strengthen the psychological intervention of the patients and establish the follow-up medi-cation compliance system for improving the medication compliance.

Objective To investigate the clinical value and experience of transperitoneal and retroperitoneal robot-assisted partial nephrectomy for renal hi1 ar tumors.Methods We evaluated 48 patients who had partial nephrectomy for renal hilar tumor by robotic surgical syestem from January 2013 to March 2017.In those cases,35 were male and 13 were female,with an average age of 57.3 (range from 41 to 75 ),27 cases were ventral tumor and 21 cases were dorsal tumor.3 cases were totally confined to the renal parenchyma,the other 45 cases were partially confined to the renal parenchyma.18 cases were performed surgery by retroperitoneal route,the rest 30 cases were performed by peritoneal route.Results A total of 48 patients underwent successful robotic partial nephrectomy for renal hilar tumors.The mean warm ischemia time was 22 minutes (range from 16 to 33 minutes) and the mean estimated blood loss was 88 md (range from 50 to 350 ml).No bleeding-related complications were found.Histopathology confirmed 39 cases of ccRCC,7 cases of angioleiomyolipoma,2 cases of renal oncocytoma.There was one case in this review was positive surgical margin (2.1％) and found no sign of recurrence during the short term post-operation follow-up.All cases in this review are following up after surgery to date from 2 months to 4 years,no cases of tumor recurrence or metastasis were found.Conclusions The application of transperitoneal and retroperitoneal RAPN is the effective and safe way for renal hilar tumor resection,and it has a clear advantage of renal surgical incision stitching and tumor complete resection.The choice of surgical approaches depends on the size and location of tumor and the clinical experience of the surgeon.

Objective To examine the changes of Aβ expression and its related metabolic enzymes in the brains of AD and T2DM mice, so as to explore the possible mechanism of type 2 diabetes mellitus combined with AD.Methods Five-month-old APP/PS1 double transgenic mice, ob/ob mice and the wild-type control mice were employed in this study.Immunohistochemical (IHC) staining, Elisa and Western blot were used to detect SP, Aβ and its related metabolic enzymes.Results A certain number of SPs were observed in the cerebral cortex and hip-pocampus of APP/PS1 mice;SPs were occasionally observed in the cortex of ob/ob mice, while no SP appeared in wild-type mice.Aβ40 and Aβ42 levels were significantly increased in APP/PS1 and ob/ob mice brains as compared with controls (P<0.05), thought both Aβ40 and Aβ42 levels in AD mice were significantly higher than those of ob/ob mice (P<0.05).APP expression level was highest in APP/PS1 mice among 3 groups, and its expressed higher in ob/ob mice than that of control mice (P<0.05).BACE1 expression was notably increased in APP/PS1 and ob/ob mice as compared with control(P<0.05), however, it expressed higher in APP/PS1 mice than ob/ob mice (P<0.05).The expression of Aβ degradation enzyme IDE was reduced in APP/PS1 and ob/ob mice(P<0.05), while lowest in ob/ob mice.Conclusions Overexpression of Aβ may be one of main reasons for T2DM combined AD.