BACKGROUND:Polyether ether ketone has the advantages of elastic modulus close to human cortical bone,good ray transmission,chemical stability,and biocompatibility.Polyether ether ketone is expected to be applied in the field of oral implants.However,polyether ether ketone is bioinert and is difficult to integrate with surrounding bone tissue.Therefore,how to improve the surface bioactivity of polyether ether ketone remains a major issue.OBJECTIVE:To analyze the osteogenic and vasogenic effects of polyether ether ketone surface bone forming peptide 1 and polydopamine composite coating.METHODS:Polyether ether ketone titanium sheets were immersed in dopamine solution for 24 hours to prepare polyether ether ketone-polydopamine materials.Polyether ether ketone-polydopamine material was immersed in the bone forming peptide 1 solution for 24 hours to prepare polyether ether ketone-polydopamine-bone forming peptide 1 material.The micromorphology,hydrophilicity,and elemental composition of the material were characterized.Bone marrow mesenchymal stem cells were injected on the surface of polyether ether ketone,polyether ether ketone-polydopamine,and polyether ether ketone-polydopamine-bone forming peptide-1 materials.Cell viability and adhesion status were evaluated by live/dead cell staining and cytoskeleton staining.Cellular osteogenic differentiation ability was detected by alizarin red and osteocalcin immunofluorescence staining.Human umbilical vein endothelial cells were inoculated on the surface of three groups of materials.Cell viability and angiogenesis level were assessed by live/dead cell staining and immunofluorescence staining of cytoskeleton/vascular endothelial growth factor.RESULTS AND CONCLUSION:(1)Under scanning electron microscope,the surface of polyether ether ketone material was smooth;the surface of polyether ether ketone-polydopamine material had uneven deposits,and the surface of polyether ether ketone-polydopamine-bone forming peptide 1 material had small particles protruding.The results of contact angle test showed that the hydrophilicity of polyether ether ketone-polydopamine-bone forming peptide-1 material was better than the other two materials.X-ray photoelectron spectroscopy results showed that bone forming peptide 1 had been successfully modified on the surface of polyether ether ketone material.(2)Live/dead cell staining and cytoskeleton staining exhibited that compared with the other two materials,polyether ether ketone-polydopamine-bone-forming peptide 1 material could improve the viability and adhesion of bone marrow mesenchymal stem cells.Alizarin red and osteocalcin immunofluorescence staining showed that compared with the other two materials,polyether ether ketone-polydopamine-bone forming peptide-1 materials could promote the osteogenic differentiation of bone marrow mesenchymal stem cells.(3)Live/dead cell staining and immunofluorescence staining showed that compared with the other two materials,polyether ether ketone-polydopamine-bone forming peptide 1 material could improve the viability and adhesion of human umbilical vein endothelial cells and the expression of vascular endothelial growth factor protein.(4)The results show that the modification of bone forming peptide 1 and polydopamine composite coating on polyether ether ketone surface can improve the osteogenesis and angiogenesis.

Objective:To analyze the incidence trend of lip and oral cancer in China from 1990 to 2021.Methods:The incidence data of lip and oral cancer in China from 1990 to 2021 were obtained through the Global Health Data Exchange (GHDx) database, including incidence rates by gender and age-standardized incidence rates. Joinpoint regression was used to analyze the trend of lip and oral cancer incidence rate. Age-period-cohort (APC) model was adopted to estimate the effects of Age, Period and Cohort on the incidence of lip and oral cancer in China.Results:The crude and age-standardized incidence rates of lip and oral cancer in China from 1990 to 2021 showed an increasing trend, and the crude incidence rates of the whole population, male and female in the year 2021 increased by 216.8%, 266.7% and 130.4%, respectively, compared with 1990. The age effect, period effect and birth cohort effect of the incidence risk of lip and oral cancer in China were statistically significant (all P<0.05). People of older the age and the more recent the birth cohort, the higher the incidence risk. Conclusions:The incidence of lip and oral cancer is on the rise in China from 1990 to 2021. Age, period and birth cohort are all the factors affecting the incidence of lip and oral cancer.

Objective:To analyze the incidence trend of lip and oral cancer in China from 1990 to 2021.Methods:The incidence data of lip and oral cancer in China from 1990 to 2021 were obtained through the Global Health Data Exchange (GHDx) database, including incidence rates by gender and age-standardized incidence rates. Joinpoint regression was used to analyze the trend of lip and oral cancer incidence rate. Age-period-cohort (APC) model was adopted to estimate the effects of Age, Period and Cohort on the incidence of lip and oral cancer in China.Results:The crude and age-standardized incidence rates of lip and oral cancer in China from 1990 to 2021 showed an increasing trend, and the crude incidence rates of the whole population, male and female in the year 2021 increased by 216.8%, 266.7% and 130.4%, respectively, compared with 1990. The age effect, period effect and birth cohort effect of the incidence risk of lip and oral cancer in China were statistically significant (all P<0.05). People of older the age and the more recent the birth cohort, the higher the incidence risk. Conclusions:The incidence of lip and oral cancer is on the rise in China from 1990 to 2021. Age, period and birth cohort are all the factors affecting the incidence of lip and oral cancer.

BACKGROUND:Polyether ether ketone has the advantages of elastic modulus close to human cortical bone,good ray transmission,chemical stability,and biocompatibility.Polyether ether ketone is expected to be applied in the field of oral implants.However,polyether ether ketone is bioinert and is difficult to integrate with surrounding bone tissue.Therefore,how to improve the surface bioactivity of polyether ether ketone remains a major issue.OBJECTIVE:To analyze the osteogenic and vasogenic effects of polyether ether ketone surface bone forming peptide 1 and polydopamine composite coating.METHODS:Polyether ether ketone titanium sheets were immersed in dopamine solution for 24 hours to prepare polyether ether ketone-polydopamine materials.Polyether ether ketone-polydopamine material was immersed in the bone forming peptide 1 solution for 24 hours to prepare polyether ether ketone-polydopamine-bone forming peptide 1 material.The micromorphology,hydrophilicity,and elemental composition of the material were characterized.Bone marrow mesenchymal stem cells were injected on the surface of polyether ether ketone,polyether ether ketone-polydopamine,and polyether ether ketone-polydopamine-bone forming peptide-1 materials.Cell viability and adhesion status were evaluated by live/dead cell staining and cytoskeleton staining.Cellular osteogenic differentiation ability was detected by alizarin red and osteocalcin immunofluorescence staining.Human umbilical vein endothelial cells were inoculated on the surface of three groups of materials.Cell viability and angiogenesis level were assessed by live/dead cell staining and immunofluorescence staining of cytoskeleton/vascular endothelial growth factor.RESULTS AND CONCLUSION:(1)Under scanning electron microscope,the surface of polyether ether ketone material was smooth;the surface of polyether ether ketone-polydopamine material had uneven deposits,and the surface of polyether ether ketone-polydopamine-bone forming peptide 1 material had small particles protruding.The results of contact angle test showed that the hydrophilicity of polyether ether ketone-polydopamine-bone forming peptide-1 material was better than the other two materials.X-ray photoelectron spectroscopy results showed that bone forming peptide 1 had been successfully modified on the surface of polyether ether ketone material.(2)Live/dead cell staining and cytoskeleton staining exhibited that compared with the other two materials,polyether ether ketone-polydopamine-bone-forming peptide 1 material could improve the viability and adhesion of bone marrow mesenchymal stem cells.Alizarin red and osteocalcin immunofluorescence staining showed that compared with the other two materials,polyether ether ketone-polydopamine-bone forming peptide-1 materials could promote the osteogenic differentiation of bone marrow mesenchymal stem cells.(3)Live/dead cell staining and immunofluorescence staining showed that compared with the other two materials,polyether ether ketone-polydopamine-bone forming peptide 1 material could improve the viability and adhesion of human umbilical vein endothelial cells and the expression of vascular endothelial growth factor protein.(4)The results show that the modification of bone forming peptide 1 and polydopamine composite coating on polyether ether ketone surface can improve the osteogenesis and angiogenesis.

Objective:To predict the short-term postoperative recurrence status of patients with refractory temporal lobe epilepsy (TLE) by analyzing preoperative 18F-FDG PET images and patients′ clinical characteristics based on deep residual neural network (ResNet). Methods:Retrospective analysis was conducted on preoperative 18F-FDG PET images and clinical data of 220 patients with refractory TLE (132 males and 88 females, age 23.0(20.0, 30.2) years)) in the First Affiliated Hospital of Jinan University between January 2014 and June 2020. ResNet was used to perform high-throughput feature extraction on preprocessed PET images and clinical features, and to perform a postoperative recurrence prediction task for differentiating patients with TLE. The predictive performance of ResNet model was evaluated by ROC curve analysis, and the AUC was compared with that of classical Cox proportional risk model using Delong test. Results:Based on PET images combined with clinical feature training, AUCs of the ResNet in predicting 12-, 24-, and 36-month postoperative recurrence were 0.895±0.073, 0.861±0.058 and 0.754±0.111, respectively, which were 0.717±0.093, 0.697±0.081 and 0.645±0.087 for Cox proportional hazards model respectively ( z values: -3.00, -2.98, -1.09, P values: 0.011, 0.018, 0.310). The ResNet showed best predictive effect for recurrence events within 12 months after surgery. Conclusion:The ResNet model is expected to be used in clinical practice for postoperative follow-up of patients with TLE, helping for risk stratification and individualized management of postoperative patients.

Objective:To explore the feasibility of autologous transplantation of frozen-thawed ovarian tissue to induce pubertal development in adolescent females.Methods:Before hematopoietic stem cell transplantation in patient with severe β-thalassemia, 11 pieces of ovarian tissue were frozen in the Center of Reproductive Medicine, the Sixth Affiliated Hospital of Sun Yat-sen University in 2019. The patient was diagnosed as premature ovarian failure after hematopoietic stem cell transplantation. There were no signs of puberty development and menarche. Orthotopic ovarian tissue transplantation was performed for the patient through laparoscopy, and a total of 5 pieces of ovarian tissue were transplanted on January 20, 2022. Postoperatively, we followed up the sex hormone levels, growth and development of the patients and menarche.Results:The patient developed menarche 5 months after ovarian transplantation. The levels of sex hormones showed that follicle-stimulating hormone and luteinizing hormone were significantly decreased, and estradiol levels were significantly increased, indicating that ovarian tissue transplantation was successful, and follicles had begun to recruit and develop. The patient's ultrasonography revealed a markedly enlarged uterus and a thickened endometrium. Antral follicles were detected in the left implantation site of pelvic cavity.Conclusion:Cryopreservation of ovarian tissue is recommended for fertility preservation in prepubertal children. Autologous frozen-thawed ovarian tissue transplantation can induce natural puberty development and restore the reproductive endocrine function in children with ovarian failure, delayed puberty development or even stagnation.

Objective:To explore the feasibility of autologous transplantation of frozen-thawed ovarian tissue to induce pubertal development in adolescent females.Methods:Before hematopoietic stem cell transplantation in patient with severe β-thalassemia, 11 pieces of ovarian tissue were frozen in the Center of Reproductive Medicine, the Sixth Affiliated Hospital of Sun Yat-sen University in 2019. The patient was diagnosed as premature ovarian failure after hematopoietic stem cell transplantation. There were no signs of puberty development and menarche. Orthotopic ovarian tissue transplantation was performed for the patient through laparoscopy, and a total of 5 pieces of ovarian tissue were transplanted on January 20, 2022. Postoperatively, we followed up the sex hormone levels, growth and development of the patients and menarche.Results:The patient developed menarche 5 months after ovarian transplantation. The levels of sex hormones showed that follicle-stimulating hormone and luteinizing hormone were significantly decreased, and estradiol levels were significantly increased, indicating that ovarian tissue transplantation was successful, and follicles had begun to recruit and develop. The patient's ultrasonography revealed a markedly enlarged uterus and a thickened endometrium. Antral follicles were detected in the left implantation site of pelvic cavity.Conclusion:Cryopreservation of ovarian tissue is recommended for fertility preservation in prepubertal children. Autologous frozen-thawed ovarian tissue transplantation can induce natural puberty development and restore the reproductive endocrine function in children with ovarian failure, delayed puberty development or even stagnation.

Objective:To investigate the efficacy and safety of the modified gasless unilateral axillary approach (MGUAA) endoscopic thyroid surgery in treatment of papillary thyroid microcarcinoma (PTMC) .Methods:From Jan. 2019 to Dec. 2019, 90 patients receiving PTMC (cT1N0M0, cI stage, 8th, 2017 AJCC) therapy by modified gasless unilateral axillary approach endoscopic thyroid surgery (MGUAA group, n=41) , and conventional open thyroid surgery (OS group, n=49) were retrospectively analyzed. Ninety patients were enrolled in the study, including 14 males and 76 females,with the mean age (42.1±12.0) years.The effectiveness of central lymph node dissection (CLND) , the operation time, the types of operation, the amount of drainage, the duration of hospital stay, the related complications, the postoperative pain of neck and axillary and the cosmetic satisfaction were compared between the two groups.SPSS 25.0 statistical software was used for statistical analysis, the measurement data was expressed by ±s, paired t test was used to compare the measurement data between groups, and Chi-square test was used to campare the count date between groups. Results:The mean age (35.0±8.6) years and the amount of surgical bleeding (12.3±7.3) ml in the MGUAA group were significantly lower than those (48.1±11.1) years and (16.1±4.3) ml in the OS group ( P<0.01) , while the mean operation time (99.1±19.5) min, the mean amount of drainage (221.4±67.9) ml and the postoperative drainage tube placement time (5.0±0.8) days were significantly higher than those of (70.6±17.8) min, (98.3±63.7) ml and (3.8±1.0) days in the MGUAA ( P<0.01) . There was no significant difference in the number of lymph nodes of CLND or the duration of hospital stay between the two groups ( P>0.05) . In terms of surgical complications, the transient recurrent laryngeal nerve injury, the postoperative hematoma, the postoperative infection, and the lymphatic leakage had no significant difference between the two groups ( P>0.05) . The MGUAA group had significant advantages in avoiding the postoperative dysphagia in front of neck, the postoperative pain of neck, and cosmetic satisfaction over the OS group [ (0.0% vs 28.6%) , (14.6% vs 71.4%) , (1.1±0.3) score vs (2.4±0.5) score ( P<0.01) ]. Whereas in axillary area pain on the surgical side, the MGUAA group was inferior to the OS group ( P<0.01) . Conclusion:The modified gasless unilateral axillary approach endoscopic thyroid surgery is a feasible, safe and cosmetically operation for PTMC (cT1N0M0, cI stage, 8th, 2017 AJCC) .

Objective:To validate the feasibility of a deep learning-based clinical target volume (CTV) auto-segmentation algorithm for cervical cancer in clinical settings.Methods:CT data sets from 535 cervical cancer patients were collected. CTVs were delineated according to RTOG and JCOG guidelines, reviewed by experts, and then used as reference contours for training (definitive 177, post-operative 302) and test (definitive 23, post-operative 33). Four definitive and 6 post-operative cases were randomly selected from the testing cohort to be manually delineated by junior, intermediate, senior doctors, respectively. Dice coefficient (DSC), mean surface distance (MSD) and Hausdorff distance (HD) were used for test and comparison between auto-segmentation and RO delineation. Meantime, auto-segmentation time and manual delineation time were recorded.Results:Auto-segmentation models of dCTV 1, dCTV 2 and pCTV 1 were trained with VB-Net and showed good agreement with reference contours in the testing cohorts (DSC, 0.88, 0.70, 0.86 mm; MSD, 1.32, 2.42, 1.15 mm; HD, 21.6, 22.4, 20.8 mm). For dCTV 1, the difference between auto-segmentation and all three groups of doctors was not significant ( P>0.05). For dCTV 2 and pCTV 1, auto-segmentation was better than the junior and intermediate doctors (both P<0.05). Auto-segmentation time consumption was considerably shorter than that of manual delineation. Conclusions:Deep learning-based CTV auto-segmentation algorithm for cervical cancer achieves comparable accuracy to manual delineation of senior doctors. Clinical application of the algorithm can contribute to shortening doctors′ manual delineation time and improving clinical efficiency. Furthermore, it may serve as a guide for junior doctors to improve the consistency and accuracy of cervical cancer CTV delineation in clinical practice.

Objective To identify abnormal cerebral glucose metabolism characteristics in patients with corticobasal degeneration (CBD) using 18 F-fluorodeoxyglucose (FDG) PET imaging. Methods From January 2014 to January 2017, resting-state brain 18 F-FDG PET imaging was performed in 10 CBD patients (5 males, 5 females; average age: (63.4±6.2) years) and 20 age-matched healthy subjects (8 males, 12 female; average age: (63.6±6.2) years). Voxel-based statistical parametric mapping (SPM) was used to analyze images to obtain the CBD-related brain metabolic characteristics. The regional cerebral metabolic rate of glucose (rCMRglc) was compared between 2 groups by two-sample t test. Results Compared with healthy controls, CBD group demonstrated asymmetrically decreased glucose metabolism mainly in the cere-bral hemisphere opposite to the more clinically affected body side, including the superior, middle and inferi-or frontal gyrus, the precentral gyrus, the superior and inferior parietal lobule, the angular gyrus, the supra-marginal gyrus, the precuneus, the middle occipital gyrus, the middle and inferior temporal gyrus, Heschl gyrus, the fusiform gyrus, the insula and the thalamus. And relatively increased glucose metabolism was present in ipsilateral precentral and postcentral gyrus, hippocampus, insula and putamen, bilateral cerebel-lum, paracentral lobules and pontine. The rCMRglc in those regions was significantly different between CBD patients and healthy controls (t values: 4.236-9.044, all P<0.01). Conclusion The asymmetric cerebral glucose metabolism features in CBD based on 18 F-FDG PET imaging contribute to the differential diagnosis between CBD patients and healthy subjects.