Compared with other drug loading methods,PLGA drug-loaded microspheres have the advantages of sustained and con-trolled release ability,biodegradability,drug release stability,and targeted delivery function,which have become a research hotspot in pharmaceutics.With the improvement of the preparation technology and the quality of microspheres,they have been gradually promoted in clinical practice,and have achieved remarkable results in the treatment of tumors,osteoarthritis,diabetes,eye diseases and so on.However,there is still a lack of systematic review on the application of PLGA microspheres in stomatology.This article aims to intro-duce the clinical application characteristics of PLGA microspheres,and review their application prospect in oral and maxillofacial tumors,temporomandibular joint diseases,periodontitis,caries and alveolar bone defects,so as to provide reference for their applica-tion in stomatology.

OBJECTIVE：To systematically evaluate the effectiveness and safety of Shenfu qiangxin pills combined with chemical medicine conventional therapy in the treatment of chronic heart failure ，and to provide evidence-based reference for clinical drug use. METHODS ：Retrieved from CNKI ，Wanfang database ，VIP，Google Scholar ，PubMed，the Cochrane Library and Embase database ，RCTs about Shengfu qiangxin pills combined with chemical medicine conventional therapy （trial group ） versus chemical medicine conventional treatment （control group ）were collected during the inception to May 12th，2020. After literature screening and data extraction ，the quality of the literatures was evaluated with risk bias assessment tool recommended by Cochrane 5.1.0 system evaluator manual. Meta-analysis and sensitivity analysis were performed by using Stata 14.0 software. RESULTS：A total of 7 RCTs were included ，involving 596 patients. Meta-analysis results showed that the total response rate of trial group was significantly higher than that of control group [OR ＝4.14，95％CI（2.15，7.97），P＜0.000 01]；the results of sub-group analysis according to the different criteria for determining the efficacy showed that the total response rates of trial group determined by Lee integral method and cardiac function grading method were sig nificantly higher than that of the control group （P＜0.05）. After treatment ，N-terminal pro-B-type natriuretic peptide （NT-proBNP） level of trial group was significantly lower than that of control group [OR ＝－1.33，95％CI（－1.55， qq.com －1.11），P＜0.000 01]. Results of sub-group analysis accor- ding to cardiac failure type showed that NT-proBNP level of patients with chronic heart failure in trial group was lower than control group （P＜0.001）. The level of left ventricular ejection fraction （LVEF）in trial group after treatment [WMD ＝5.76，95％CI （5.05，6.47），P＜0.000 01] was significantly higher than control group ；after treatment ，the level of B-type natriuretic peptide [SMD＝－1.61，95％CI（－2.58，－0.54），P＜0.000 01]，left ventricular end-diastolic diameter （LVEDD）level [WMD ＝ －6.06，95％CI（－6.84，－5.27），P＜0.000 01]，left ventricular end-systolic diameter level [WMD ＝－0.52，95％CI（－5.70，－4.33）， P＜0.000 01] were significantly lower than control group. There was no statistically significant difference in the incidence of ADR between 2 groups（P＞0.05）. Results of sensitivity analysis showed that when NT-proBNP ，LVEF level ，LVEDD level after treatment were used as indicators ，there was no significant difference in the analysis results after eliminating heterogeneity source ， compared with before elimination. CONCLUSIONS ：Shenfu qiangxin pills combined with chemical medicine conventional treatment has good efficacy and safety.