BACKGROUND:There are numerous clinical studies on comparing absorbable internal fixation system and titanium metal internal fixation system in maxilofacial fractures; however, the systematic reviews and Meta-analysis in this field are rare. OBJECTIVE:To compare the clinical effect of absorbable internal fixation system and titanium internal fixation system in maxilofacial fractures through systematic review and Meta-analysis. MATERIALS AND METHODS:The randomized controled trials and controled clinical trials regarding the application of absorbable internal fixation system and titanium internal fixation system in maxilofacial fractures were electronicaly retrieved from Medline, Embase, the Cochrane Central Register of Controled Trials, China Biology Medicine disc, and China Academic Journal Network Publishing Database using the keywords. Meta-analysis was conducted using Revman 5.3 software. RESULTS AND CONCLUSION:Thirteen clinical studies were included, and totaly 1 718 patients were involved. The Meta-analysis results showed that the removal rate of implants in the absorbable internal fixation system group was significantly lower than that in the titanium internal fixation group (P=0.000 2); there were no significant differences in the healing rate of fracture I stage, the incidence of insufficient fixation in fracture site and the incidence of long-term complications between these two groups. These results demonstrate that the efficiency and safety of absorbable internal fixation system in maxillofacial fracture is satisfactory, and can reduce the proportion of secondary surgical removal of the implant. More randomized controlled trials should be conducted to confirm this conclusion.

BACKGROUND:Absorbable colagen membrane can be theoreticaly applied to secondary alveolar bone grafting in alveolar cleft surgery, which can improve the bone preservation and slow bone resorption. However, there is stil no unified conclusion.
OBJECTIVE:To assess the efficacy and safety of absorbable colagen membrane for secondary alveolar bone grafting viaa systematic review.
METHODS:MEDLINE, EMBASE, CBM and CAJD were searched for eligible articles addressing clinical randomized controled or controled trials of absorbable colagen membrane for secondary alveolar bone grafting. Test group received bone grafting with absorbable colagen membrane and control group only received bone grafting. Meta-analysis on the clinical success rate of bone grafting and incidence of complications in the recipient region was delivered with Revman 5.3.
RESULTS AND CONCLUSION:Five clinical trials, involving 416 cleft sites and 387 participants, were included. Two had high risk of bias and the rest had unclear risk of bias. If “the height of new bone is≥ 50% of alveolar height” was adopted as clinical success, the clinical success rate of the test group was significantly higher than that of the control group (P=0.002, relative risk value=1.33, 95% confidence interval [1.11, 1.60]). If “the height of new bone is≥ 75% of alveolar height” was chosen as clinical success, the clinical success rate of the test group was higher than that of the control group, but there was no significant difference between the two groups (P=0.06, relative risk value=1.40, 95% confidence interval [0.99, 1.99]). For safety, the use of absorbable colagen membrane could not increase the complications incidence (P=0.35, relative risk value=0.66, 95% confidence interval [0.28, 1.58]). So, the use of absorbable colagen membrane is safe to improve the clinical success rate of secondary alveolar bone grafting in alveolar cleft surgery. More randomized controled trials should be considered to reinforce the conclusion.

OBJECTlVE To expIore the intervention effect of Iosartan on the Iung oxidative injury in-duced by paraquat(PQ). METHODS AduIt maIe SD rats were randomIy divided into 4 groups:normaI controI group,PQ intoxication group(rats were treated with singIe ig PQ 40 mg·kg-1 ),Iosartan inter-vention for 7 and 14 d groups(rats were ig given Iosartan 10 mg·kg-1 daiIy for 7 and 14 consecutive days after PQ was given). AII rats were sacrificed on the 16th day to obtain Iung tissues. HE staining was used to observe the Iung pathoIogicaI changes. The activities of superoxide dismutase(SOD),cataIase (CAT)and totaI antioxidant capacity(T-AOC)and content of Iipid peroxide(LPO)were detected by spectrophotometry. ReaI-time quantitative PCR was used to investigate the NF-κB mRNA expression in Iung tissue. RESULTS PathoIogicaI examination showed that acute Iung injury and significant Iung fibro-sis appeared in PQ intoxication group but were reversed by Iosartan. The IeveIs of SOD,CAT and T-AOC decreased whiIe the content of LPO in PQ intoxication group increased significantIy compared with controI group(P﹤0.05). Compared with PQ intoxication group,the IeveIs of SOD,CAT and T-AOC in-creased and the content of LPO decreased in Iosartan intervention for 7 and 14 d groups(P﹤0.05),and the IeveIs of T-AOC and LPO in Iosartan intervention for 7 and 14 d groups and the activities of SOD and CAT in Iosartan intervention for 14 d group nearIy returned to normaI. The mRNA expression of NF-κB was upreguIated after rats were exposed to PQ,downreguIated in Iosartan intervention for 7 and 14 d groups in rat Iung tissues( P﹤0.05),but nearIy returned to normaI. CONCLUSlON Oxidative stress may be invoIved in the acute PQ poisoning process and Iosartan might have intervention effect on acute PQ Iung damage by improving the antioxidant capacity and downreguIating the mRNA expression of NF-κB.

In vitro diagnosis (IVD) is an important source of clinical diagnostic information, and provides an important decision basis for disease prevention, diagnosis and treatment. IVD is a necessary tool for promoting graded diagnosis and treatment, realizing precision medicine, constructing a "Healthy China" and responding to major public health emergencies. Combining the great progress made in the development of in vitro diagnostics in China and the shortcomings and weaknesses faced by it, this article analyzed the demand for IVD, policy support, technical and industrial development trends, and the ways to accelerate the industrialization development, aiming to promote the development and improvement of IVD in China.

Microfluidics is the science and technology to manipulate small amounts of fluids in micro/nano-scale space. Multiple modules could be integrated into microfluidic device, and due to its advantages of microminiaturization and controllability, microfluidics has drawn extensive attention since its birth. In this paper, the literature data related to microfluidics research from January 1, 2006 to December 31, 2021 were obtained from Web of Science Core Collection database. CiteSpace 5.8.R3 software was used for bibliometrics analysis, so as to explore the research progress and development trends of microfluidics research at home and abroad. Based on the analysis of 50 129 articles, it could be seen that microfluidics was a hot topic of global concern, and the United States had a certain degree of authority in this field. Massachusetts Institute of Technology and Harvard University not only had a high number of publications, but also had strong influence and extensive cooperation network. Combined with ultrasonic, surface modification and sensor technology, researchers constructed paper-based microfluidic, droplet microfluidic and digital microfluidic platforms, which were applied in the field of immediate diagnosis, nucleic acid and circulating tumor cell analysis of in vitro diagnosis and organ-on-a-chip. China was one of the countries with a high level of research in the field of microfluidics, while the industrialization of high-end products needed to be improved. As people's demand for disease risk prediction and health management increased, promoting microfluidic technological innovation and achievement transformation is of great significance to safeguard people's life and health.
China ; Humans ; Microfluidic Analytical Techniques ; Microfluidics ; Oligonucleotide Array Sequence Analysis