Bioactive glass (BG) has been widely used in the preparation of artificial bone scaffolds due to its excellent biological properties and non-cytotoxicity, which can promote bone and soft tissue regeneration. However, due to the brittleness, poor mechanical strength, easy agglomeration and uncontrollable structure of glass material, its application in various fields is limited. In this regard, most current researches mainly focus on mixing BG with organic or inorganic materials by freeze-drying method, sol-gel method, etc., to improve its mechanical properties and brittleness, so as to increase its clinical application and expand its application field. This review introduces the combination of BG with natural organic materials, metallic materials and non-metallic materials, and demonstrates the latest technology and future prospects of BG composite materials through the development of scaffolds, injectable fillers, membranes, hydrogels and coatings. The previous studies show that the addition of BG improves the mechanical properties, biological activity and regeneration potential of the composites, and broadens the application of BG in the field of bone tissue engineering. By reviewing the recent BG researches on bone regeneration, the research potential of new materials is demonstrated, in order to provide a reference for future related research.
Bone Regeneration ; Bone and Bones ; Freeze Drying ; Glass ; Hydrogels

Medical image segmentation based on deep learning has become a powerful tool in the field of medical image processing. Due to the special nature of medical images, image segmentation algorithms based on deep learning face problems such as sample imbalance, edge blur, false positive, false negative, etc. In view of these problems, researchers mostly improve the network structure, but rarely improve from the unstructured aspect. The loss function is an important part of the segmentation method based on deep learning. The improvement of the loss function can improve the segmentation effect of the network from the root, and the loss function is independent of the network structure, which can be used in various network models and segmentation tasks in plug and play. Starting from the difficulties in medical image segmentation, this paper first introduces the loss function and improvement strategies to solve the problems of sample imbalance, edge blur, false positive and false negative. Then the difficulties encountered in the improvement of the current loss function are analyzed. Finally, the future research directions are prospected. This paper provides a reference for the reasonable selection, improvement or innovation of loss function, and guides the direction for the follow-up research of loss function.
Algorithms ; Image Processing, Computer-Assisted

Computer-aided diagnosis (CAD) systems play a very important role in modern medical diagnosis and treatment systems, but their performance is limited by training samples. However, the training samples are affected by factors such as imaging cost, labeling cost and involving patient privacy, resulting in insufficient diversity of training images and difficulty in data obtaining. Therefore, how to efficiently and cost-effectively augment existing medical image datasets has become a research hotspot. In this paper, the research progress on medical image dataset expansion methods is reviewed based on relevant literatures at home and abroad. First, the expansion methods based on geometric transformation and generative adversarial networks are compared and analyzed, and then improvement of the augmentation methods based on generative adversarial networks are emphasized. Finally, some urgent problems in the field of medical image dataset expansion are discussed and the future development trend is prospected.
Humans ; Diagnosis, Computer-Assisted ; Diagnostic Imaging ; Datasets as Topic

Glaucoma is one of blind causing diseases. The cup-to-disc ratio is the main basis for glaucoma screening. Therefore, it is of great significance to precisely segment the optic cup and disc. In this article, an optic cup and disc segmentation model based on the linear attention and dual attention is proposed. Firstly, the region of interest is located and cropped according to the characteristics of the optic disc. Secondly, linear attention residual network-34 (ResNet-34) is introduced as a feature extraction network. Finally, channel and spatial dual attention weights are generated by the linear attention output features, which are used to calibrate feature map in the decoder to obtain the optic cup and disc segmentation image. Experimental results show that the intersection over union of the optic disc and cup in Retinal Image Dataset for Optic Nerve Head Segmentation (DRISHTI-GS) dataset are 0.962 3 and 0.856 4, respectively, and the intersection over union of the optic disc and cup in retinal image database for optic nerve evaluation (RIM-ONE-V3) are 0.956 3 and 0.784 4, respectively. The proposed model is better than the comparison algorithm and has certain medical value in the early screening of glaucoma. In addition, this article uses knowledge distillation technology to generate two smaller models, which is beneficial to apply the models to embedded device.
Humans ; Optic Disk/diagnostic imaging* ; Glaucoma/diagnosis* ; Algorithms ; Diagnostic Techniques, Ophthalmological ; Databases, Factual

OBJECTIVE: To investigate the effects of enhanced recovery after surgery (ERAS) on postoperative function and pain in total hip arthroplasty (THA) patients with high comorbidity. METHODS: Patients with THA who were admitted between January 2020 and January 2022 were selected as the study objects, and a total of 223 patients with high comorbidity met the selection criteria. Patients were randomly divided into two groups using the random envelope method. During perioperative period, 112 cases in the ERAS group were treated according to the ERAS protocol and 111 cases in the control group with the traditional protocol. There was no significant difference in gender, age, body mass index, Charlson comorbidity index, preoperative diagnosis, the type and number of the comorbidities, preoperative visual analogue scale (VAS) score between the two groups ( P>0.05). However, the Harris score of ERAS group was significantly lower than that of control group before operation ( P<0.05). Preoperative and postoperative hospital stays were recorded. The VAS score was used to evaluate the pain before operation, at 1 day after operation, at the leaving bed time, at the day after discharge, and at 2 weeks after operation. Harris score was used to evaluate hip function before operation and at 2 weeks, 1 month, 3 months, 6 months, and 12 months after operation. The incidence of complications, 30-day readmission rate, mortality rate, and patient's satisfaction were recorded. RESULTS: The length of preoperative hospital stay in ERAS group was significantly shorter than that in control group ( P<0.05). But there was no significant difference in the length of postoperative hospital stay between groups ( P>0.05). All patients in the two groups were followed up 12 months. The VAS score in the two groups after operation was lower than that before operation, and showed a gradually trend with the extension of time, with significant differences between different time points ( P<0.05). VAS scores of ERAS group were significantly lower than those of control group at different time points after operation ( P<0.05). The postoperative Harris scores in both groups were higher than those before operation, and showed a gradually increasing trend with the extension of time, with significant differences between different time points ( P<0.05). Harris scores of ERAS group at 2 weeks, 1 month, and 3 months after operation were significantly higher than those of control group ( P<0.05). Complications occurred in 2 cases (1.79%) of the ERAS group and 6 cases (5.41%) of the control group, with no significant difference in incidence ( P>0.05). In the control group, 1 case was readmitted within 30 days after operation, and 1 case died of severe pneumonia within 1 year of follow-up. There was no readmission or death in ERAS group, and there was no significant difference in the above indexes between the two groups ( P>0.05). At last follow-up, the satisfaction rate of patients in ERAS group was slightly higher than that in control group, but the difference was not significant ( P>0.05). CONCLUSION For THA patients with high comorbidity, ERAS protocol can shorten preoperative waiting time, better reduce pain, and improve hip function.
Humans ; Arthroplasty, Replacement, Hip ; Enhanced Recovery After Surgery ; Comorbidity ; Pain ; Postoperative Period

<p>OBJECTIVETo assess the level of language understanding and expression of healthy children aged from 8 to 16 months in urban Beijing and to investigate the children's physical and psychological development conditions and social and economic status of children's family as to identifying the related factors to children's language development and providing a basis for instructing parents child-rearing and promoting early children language development.p><p>METHODSA quantitative Cross-sectional Study was made. The parents or care givers of 636 healthy young children, randomly stratified and selected in two districts in Beijing were interviewed. T-test was used to compare the scores of language understanding and expression between boys and girls in the same age. Single and multiple factors analysis were used so as to find out the related factors.p><p>RESULTSFor boys, the average scores of language were respectively 115.0 for 8 months, 243.0 for 12 months and 410.6 for 16 months; for girls the average scores were respectively 109.9 for 8 months, 286.4 for 12 months and 456.2 for 16 months. The average score of language understanding of boys was higher than that of girls only in the 11 month group. The average scores of language expression of girls were higher than those of boys in 11, 12, 14, 15 month groups. Multiple factors analysis showed that parent-child book reading, parent-child tape listening, higher education level of grandmothers, children' extroversion personality, child being able to speak one word and children's age were positively related to the children' language score.p><p>CONCLUSIONProviding rich language environment should be helpful to early children's language development.p>
China ; Cross-Sectional Studies ; Female ; Humans ; Infant ; Language Development ; Male ; Reading ; Speech ; Surveys and Questionnaires ; Urban Population ; statistics & numerical data

<p>OBJECTIVETo investigate amplification of zinc finger protein 217 (ZNF217) gene in ovarian serous cystadenocarcinoma and its clinical significance.p><p>METHODSTwenty three specimens of ovarian carcinoma, 10 specimens of ovarian benign tumors and 7 specimens of normal ovaries and two ovarian cancer cell lines, SKOV3 and HO-8910 were examined by fluorescence in situ hybridization (FISH).p><p>RESULTSThe amplification of ZNF217 was gained in 12 case of ovarian cancers, there was only 1 case in ovarian benign tumor and not amplication in normal ovary.p><p>CONCLUSIONThe amplification of ZNF217 is associated with ovarian cancer. Oncogenes ZNF217 maybe play a role in cell differentiation and indicate poorer survival in patients with ovarian cancer.p>
Adult ; Aged ; Cell Differentiation ; Cell Line, Tumor ; Cystadenocarcinoma, Serous ; genetics ; pathology ; Cystadenoma, Serous ; genetics ; pathology ; Female ; Gene Amplification ; Humans ; In Situ Hybridization, Fluorescence ; Middle Aged ; Neoplasm Staging ; Ovarian Neoplasms ; genetics ; pathology ; Survival Analysis ; Trans-Activators ; genetics

OBJECTIVE: Different methods have been utilized to prevent enamel demineralization and other complications during orthodontic treatment. However, none of these methods can offer long-lasting and effective prevention of orthodontic complications or interventions after complications occur. Considering the photocatalytic effect of TiO2 on organic compounds, we hoped to synthesize a novel bracket with a TiO2 thin film to develop a photocatalytic antimicrobial effect. METHODS: The sol-gel dip coating method was used to prepare TiO2 thin films on ceramic bracket surfaces. Twenty groups of samples were composed according to the experimental parameters. Crystalline structure and surface morphology were characterized by X-ray diffraction and scanning electron microscopy, respectively; film thickness was examined with a surface ellipsometer. The photocatalytic properties under ultraviolet (UV) light irradiation were analyzed by evaluating the degradation ratio of methylene blue (MB) at a certain time. Antibacterial activities of selected thin films were also tested against Lactobacillus acidophilus and Candida albicans. RESULTS: Films with 5 coating layers annealed at 700℃ showed the greatest photocatalytic activity in terms of MB decomposition under UV light irradiation. TiO2 thin films with 5 coating layers annealed at 700℃ exhibited the greatest antimicrobial activity under UV-A light irradiation. CONCLUSIONS: These results provide promising guidance in prevention of demineralization by increasing antimicrobial activities of film coated brackets.
Candida albicans ; Ceramics* ; Crystallins ; Dental Enamel ; Esthetics ; Hope ; Lactobacillus acidophilus ; Methods ; Methylene Blue ; Microscopy, Electron, Scanning ; Ultraviolet Rays ; X-Ray Diffraction

<p>OBJECTIVETo unveil the distribution of E-selectin G98T polymorphism in exon 2 and the S128R polymorphism in exon 4 of the Chinese Zhuang and Han ethnic groups in Guangxi province.p><p>METHODSPolymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), gene sequencing and DNA sequencing were performed on 162 healthy Zhuangs and 170 healthy Hans.p><p>RESULTSThe allele frequencies of G, T for E-selectin polymorphism in the exon 2 were 94.8% and 5.2% in Zhuangs, 95.3% and 4.7% in Hans, respectively; The allele frequencies of S, R for E-selectin polymorphism in the exon 4 were 92.0% and 8.0% in Zhuangs, 95.9% and 4.1% in Hans, respectively. There was significant difference in frequencies of genotype and allele in E-selectin S128R polymorphism between Zhuangs and Hans(chi-square test=4.482, P=0.034).p><p>CONCLUSIONThere was significant difference in the E-selectin S128R polymorphism between Zhuangs and Hans. There was no significant difference in the E-selectin G98T polymorphism between Zhuangs and Hans.p>
Adult ; Asian Continental Ancestry Group ; genetics ; China ; ethnology ; E-Selectin ; genetics ; Exons ; Female ; Gene Frequency ; Genotype ; Humans ; Male ; Polymerase Chain Reaction ; Polymorphism, Genetic ; Polymorphism, Restriction Fragment Length

<p>OBJECTIVETo determine the value of fluorescence in situ hybridization (FISH) to the diagnosis of chromosome abnormality in genetic diseases and prenatal diagnosis.p><p>METHODSFISH was performed using appropriate probes, including alpha-satellite DNA probe, chromosome sequence specific probe and whole chromosome painting probe, to examine the blood samples from 36 patients who were suspected of having chromosome abnormality by conventional cytogenetics, and to examine the amniocytes from 45 pregnant women who were in need of prenatal diagnosis.p><p>RESULTSAmong 36 patients, the following karyotypes 45, X; 45, X/46, XX; 45, X/46, Xr(X); 46, X, i(Xq); 47, XXY; 46, XX, t(4;7); 47, XYY; 47, XXX; 47, XXY, inv(7); 46, XY, inv(7); 47, XX, +21 were detected by FISH. Of the fetuses of the 45 pregnant women, two fetuses with chromosomal abnormalities were diagnosed by FISH; the karyotypes were 47, XX, +18 and 46, XY, der(15) t(Y;15) respectively.p><p>CONCLUSIONFISH can precisely and rapidly detect the chromosome abnormalities. It is a complement to the conventional cytogenetics and can be widely used in the diagnosis of genetic diseases and prenatal diagnosis.p>
Adult ; Amniocentesis ; Chromosome Aberrations ; Female ; Humans ; In Situ Hybridization, Fluorescence ; methods ; Karyotyping ; Male ; Prenatal Diagnosis ; Sex Chromosome Aberrations ; Turner Syndrome ; diagnosis