1.Quantitative analysis of the distance between articular disc and condyle in patients with temporomandibular disorders
Lei SUN ; Shifeng DAI ; Yuhua CHEN ; Xinyi XU ; Kele JIANG ; Xiaowen LI ; Chengjing LI ; Tingting WU
Journal of Shanghai Jiaotong University(Medical Science) 2025;45(6):684-692
Objective·To evaluate the relationships between disc-condyle distance and anterior disc displacement,as well as between disc-condyle distance and disc morphology,in patients with temporomandibular disorders(TMD)using magnetic resonance imaging(MRI)of the temporomandibular joint(TMJ).Methods·From September 2023 to March 2024,90 patients(180 TMJs)who visited the TMJ clinic of Department of Stomatology,The Second Affiliated Hospital of Anhui Medical University,with clinical symptoms of TMD and were diagnosed via MRI with either anterior disc displacement or no significant displacement,were included.Clinical data were collected,and MRI images were used to measure the angle of disc displacement,disc-condyle distance,disc length,and thickness.The degree of disc deformation was assessed.The relationships between clinical symptoms and anterior disc displacement,between anterior disc displacement and both disc morphology and disc-condyle distance,and between disc-condyle distance and disc morphology were analyzed.Results·Among the 90 patients,there were 16 males and 74 females,with a mean age of(28.1±14.5)years.Among the 180 TMJs,175 had clinical symptoms and 5 were asymptomatic.There were 40 joints with no displacement,78 with reducible anterior disc displacement,and 62 with irreducible anterior disc displacement.In the joints with irreducible anterior disc displacement,the proportion of those with two or more symptoms was slightly higher at 62.9%,but the difference was not statistically significant compared with the joints with no displacement or reducible anterior disc displacement.MRI assessment revealed that in the joints with irreducible anterior disc displacement,the proportion of disc deformation type Ⅲ or higher was significantly higher compared with the non-displaced joints(P<0.001).The disc length was significantly shorter(P<0.001),and the intermediate zone thickness was significantly greater(P<0.001)compared with the non-displaced joints.The disc displacement angles at centric closure and maximum opening were also significantly larger(P<0.001).The disc-condyle distance was 3.10(2.70,3.70)mm for non-displaced joints,3.40(3.00,4.00)mm for joints with reducible anterior disc displacement,and 6.60(4.78,7.90)mm for joints with irreducible anterior disc displacement,with significant differences(P<0.001).The disc-condyle distance was 3.10(2.80,3.60)mm for type Ⅰ discs,3.70(3.10,4.60)mm for type Ⅱ discs,5.10(4.00,7.30)mm for type Ⅲ discs,and 6.80(4.98,8.20)mm for type Ⅳ/Ⅴ discs,with significant differences(P<0.001).The disc-condyle distance was negatively correlated with disc length(rs=-0.469,P<0.001),positively correlated with intermediate zone thickness(rs=0.319,P<0.001),and positively correlated with disc displacement angle at centric closure(rs=0.626,P<0.001).Conclusion·With increasing severity of disc deformation,intermediate zone thickness,and disc displacement angle at centric closure,as well as decreasing disc length,the disc-condyle distance increases.The disc-condyle distance is an important indicator for MRI assessment of pathological changes in TMD.
2.Research on the mechanism of Sini Powder regulating the HPA axis and inflammatory levels to ameliorate depression-like behaviors and inhibiting tumor proliferation in liver cancer
Xiaojun CAI ; Yuwei SONG ; Renyi YANG ; Chengjing HU ; Hua LIU ; Chong ZHONG ; Jing LI
Journal of Beijing University of Traditional Chinese Medicine 2025;48(11):1507-1518
Objective To investigate the effects of Sini Powder on serum hypothalamic-pituitary-adrenal(HPA)axis-related hormones and inflammatory factors in liver cancer mice with comorbid depression,and to evaluate its effect on depressive behavior and tumor proliferation activity.Methods Forty-eight specific pathogen-free female C57BL/6 mice were randomly assigned to either a blank(n=8)or model group(n=40).The modeling group was subjected to chronic unpredictable mild stress(CUMS)for six weeks.Both groups underwent orthotopically transplanted liver tumor surgery at the end of the fourth week of CUMS treatment.At the end of the sixth week of CUMS treatment,color Doppler ultrasonography was used to observe tumor formation in the orthotopic transplantation liver tumors,and the tail suspension test was used to assess depressive behavior.Non-tumor-bearing and deceased mice were excluded.The remaining model group mice were stratified by tail suspension immobility time and randomly assigned to the following groups:model group(distilled water),Fluoxetine group(5.0 mg/kg),and Sini Powder low-dose,medium-dose,and high-dose groups(5.2,10.4,and 20.8 g/kg,respectively),with six mice per group.The treatments were administered once daily for 21 consecutive days.After treatment,depressive behaviors were assessed using the open field,tail suspension,and forced swimming tests.The proliferation status of the orthotopic liver transplantation tumor was evaluated by measuring the size of the tumor,observing pathological changes in the tumor tissue through hematoxylin and eosin staining,and detecting the positive cell rate of proliferating cell nuclear antigen(Ki-67)in the tumor tissue using immunohistochemistry.The levels of HPA axis-related hormones in serum,such as corticotropin-releasing hormone(CRH),adrenocorticotropic hormone(ACTH),corticosterone(CORT),as well as inflammatory factors such as tumor necrosis factor-α(TNF-α),interleukin-1β(IL-1β),and interleukin-6(IL-6)were measured using an enzyme-linked immunosorbent assay.Western blotting was used to assess mitogen-activated protein kinase(MAPKs)phosphorylation and the expression of nuclear factor-κB(NF-κB),NOD-like receptor family pyrin domain-containing receptor 3(NLRP3),and cysteine aspartic protease-1(Caspase-1)in orthotopic tumors.Results Compared with the blank group,the model group showed reduced total distance traveled in open field test,prolonged immobility times in the tail suspension and forced swimming tests(P<0.05,P<0.01),indicating successful establishment of the liver cancer with comorbid depression mice model.Also,the model group showed increased orthotopic tumor volume(P<0.01),and elevated serum CRH,ACTH,CORT,TNF-α,IL-1β,and IL-6 levels(P<0.01).The phosphorylation of MAPKs in tumor tissues was suppressed(P<0.01),while NF-κB,NLRP3,and Caspase-1 expression levels were downregulated(P<0.01).Compared with the model group,Sini Powder medium-and high-dose groups exhibited increased total distance traveled in the open field test(P<0.05),reduced forced swimming test and prolonged total distance traveled in open field test(P<0.01),while Sini Powder high-dose group showed reduced immobility times in the tail suspension test(P<0.05).Also,Sini Powder low-dose,medium-dose,and high-dose groups showed slower tumor growth,histological changes,including vacuolization and necrosis,decreased Ki-67 positive cell rate(P<0.01),and reduced serum CRH,ACTH,CORT,TNF-α,IL-1β,and IL-6 levels(P<0.05).Additionally,the phosphorylation of MAPKs in tumor tissues was suppressed(P<0.01),and NF-κB,NLRP3,and caspase-1 expression levels were downregulated(P<0.01).Conclusion Sini Powder may alleviate depressive behaviors and suppress tumor proliferation activity in liver cancer mice with comorbid depression by modulating MAPKs activation,inhibiting NF-κB,NLRP3,and Caspase-1 expressions,and reducing serum inflammatory factors and HPA axis-related hormones levels.
3.Exploring the mechanism of Xin Mai Jia in inhibiting hypertensive car-diac hypertrophy based on network pharmacology and animal exper-iments
Chengjing LEI ; Miao YU ; Yange LI ; Xiaoguang TANG ; Fanrong ZHAO ; Tian-tian ZHU
Chinese Journal of Clinical Pharmacology and Therapeutics 2025;30(1):32-41
AIM:To exploring the mechanism of Xin Mai Jia(XMJ)in inhibiting hypertensive cardiac hypertrophy through network pharmacology and animal experiments.METHODS:Retrieving the ac-tive ingredients and target points of XMJ by search-ing the TCMSP database and related literature re-ports;using the Gene Cards,OMIM,and Drug Bank databases to screen targets for hypertensive cardi-ac hypertrophy;constructing a network of tradi-tional Chinese medicine-active ingredients-poten-tial targets and a protein-protein interaction(PPI)network;using DAVID software for target gene on-tology(GO)functional enrichment analysis and Kyo-to Encyclopedia of Genes and Genomes(KEGG)pathway enrichment analysis;using Auto Dock soft-ware for molecular docking.A spontaneously hy-pertensive rat(SHR)model was established,and hematoxylin-eosin(HE)staining was used to detect the morphology of cardiac tissue and cellular hy-pertrophy,Masson staining was used to detect col-lagen deposition in cardiac tissue,and Western blot to detect the expression of heat shock protein(HSP90AA1),mammalian target of rapamycin(mTOR),peroxisome proliferator-activated receptor y(PPARG),and tumor necrosis factor(TNF-α)in car-diac tissue.RESULTS:A total of 56 potential active ingredients were identified in XMJ,and 5,492 tar-gets related to hypertensive cardiac hypertrophy were obtained.The targets in the core network were ranked according to their Degree values,and four main targets were selected:HSP90AA1,mTOR,PPARG,and TNF-α.The results of HE staining showed that compared with the normal group,the average area of cardiomyocytes in the SHR group increased significantly(P<0.05),while there was no significant change in the XMJ group.The hypertro-phy in the SHR+XMJ group was significantly alleviat-ed(P<0.05).The results of Masson staining showed that compared with the normal group,the levels of interstitial fibrosis and perivascular fibrosis in the SHR group rats increased significantly(P<0.01),and XMJ could significantly reduce the fibrosis levels in the SHR group rats(P<0.01).The results of Western blot showed that compared with the normal group rats,the expression of HSP90AA1 and PPARG in the myocardial tissue of SHR group rats was downregu-lated,mTOR phosphorylation was downregulated,and TNF-α was significantly upregulated(P<0.01).In the SHR+XMJ group,the expression of HSP90AA1,PPARG,and TNF-α in the myocardial tis-sue of rats returned to normal levels,and mTOR phosphorylation returned to normal levels.In the XMJ group,there were no significant changes in the above indicators compared with the normal group rats.CONCLUSION:The mechanism underly-ing the inhibitory effect of XMJ on myocardial cell hypertrophy in hypertension involves a comprehen-sive action through multiple components,multiple targets,and multiple pathways.
4.Research on the mechanism of Sini Powder regulating the HPA axis and inflammatory levels to ameliorate depression-like behaviors and inhibiting tumor proliferation in liver cancer
Xiaojun CAI ; Yuwei SONG ; Renyi YANG ; Chengjing HU ; Hua LIU ; Chong ZHONG ; Jing LI
Journal of Beijing University of Traditional Chinese Medicine 2025;48(11):1507-1518
Objective To investigate the effects of Sini Powder on serum hypothalamic-pituitary-adrenal(HPA)axis-related hormones and inflammatory factors in liver cancer mice with comorbid depression,and to evaluate its effect on depressive behavior and tumor proliferation activity.Methods Forty-eight specific pathogen-free female C57BL/6 mice were randomly assigned to either a blank(n=8)or model group(n=40).The modeling group was subjected to chronic unpredictable mild stress(CUMS)for six weeks.Both groups underwent orthotopically transplanted liver tumor surgery at the end of the fourth week of CUMS treatment.At the end of the sixth week of CUMS treatment,color Doppler ultrasonography was used to observe tumor formation in the orthotopic transplantation liver tumors,and the tail suspension test was used to assess depressive behavior.Non-tumor-bearing and deceased mice were excluded.The remaining model group mice were stratified by tail suspension immobility time and randomly assigned to the following groups:model group(distilled water),Fluoxetine group(5.0 mg/kg),and Sini Powder low-dose,medium-dose,and high-dose groups(5.2,10.4,and 20.8 g/kg,respectively),with six mice per group.The treatments were administered once daily for 21 consecutive days.After treatment,depressive behaviors were assessed using the open field,tail suspension,and forced swimming tests.The proliferation status of the orthotopic liver transplantation tumor was evaluated by measuring the size of the tumor,observing pathological changes in the tumor tissue through hematoxylin and eosin staining,and detecting the positive cell rate of proliferating cell nuclear antigen(Ki-67)in the tumor tissue using immunohistochemistry.The levels of HPA axis-related hormones in serum,such as corticotropin-releasing hormone(CRH),adrenocorticotropic hormone(ACTH),corticosterone(CORT),as well as inflammatory factors such as tumor necrosis factor-α(TNF-α),interleukin-1β(IL-1β),and interleukin-6(IL-6)were measured using an enzyme-linked immunosorbent assay.Western blotting was used to assess mitogen-activated protein kinase(MAPKs)phosphorylation and the expression of nuclear factor-κB(NF-κB),NOD-like receptor family pyrin domain-containing receptor 3(NLRP3),and cysteine aspartic protease-1(Caspase-1)in orthotopic tumors.Results Compared with the blank group,the model group showed reduced total distance traveled in open field test,prolonged immobility times in the tail suspension and forced swimming tests(P<0.05,P<0.01),indicating successful establishment of the liver cancer with comorbid depression mice model.Also,the model group showed increased orthotopic tumor volume(P<0.01),and elevated serum CRH,ACTH,CORT,TNF-α,IL-1β,and IL-6 levels(P<0.01).The phosphorylation of MAPKs in tumor tissues was suppressed(P<0.01),while NF-κB,NLRP3,and Caspase-1 expression levels were downregulated(P<0.01).Compared with the model group,Sini Powder medium-and high-dose groups exhibited increased total distance traveled in the open field test(P<0.05),reduced forced swimming test and prolonged total distance traveled in open field test(P<0.01),while Sini Powder high-dose group showed reduced immobility times in the tail suspension test(P<0.05).Also,Sini Powder low-dose,medium-dose,and high-dose groups showed slower tumor growth,histological changes,including vacuolization and necrosis,decreased Ki-67 positive cell rate(P<0.01),and reduced serum CRH,ACTH,CORT,TNF-α,IL-1β,and IL-6 levels(P<0.05).Additionally,the phosphorylation of MAPKs in tumor tissues was suppressed(P<0.01),and NF-κB,NLRP3,and caspase-1 expression levels were downregulated(P<0.01).Conclusion Sini Powder may alleviate depressive behaviors and suppress tumor proliferation activity in liver cancer mice with comorbid depression by modulating MAPKs activation,inhibiting NF-κB,NLRP3,and Caspase-1 expressions,and reducing serum inflammatory factors and HPA axis-related hormones levels.
5.Quantitative analysis of the distance between articular disc and condyle in patients with temporomandibular disorders
Lei SUN ; Shifeng DAI ; Yuhua CHEN ; Xinyi XU ; Kele JIANG ; Xiaowen LI ; Chengjing LI ; Tingting WU
Journal of Shanghai Jiaotong University(Medical Science) 2025;45(6):684-692
Objective·To evaluate the relationships between disc-condyle distance and anterior disc displacement,as well as between disc-condyle distance and disc morphology,in patients with temporomandibular disorders(TMD)using magnetic resonance imaging(MRI)of the temporomandibular joint(TMJ).Methods·From September 2023 to March 2024,90 patients(180 TMJs)who visited the TMJ clinic of Department of Stomatology,The Second Affiliated Hospital of Anhui Medical University,with clinical symptoms of TMD and were diagnosed via MRI with either anterior disc displacement or no significant displacement,were included.Clinical data were collected,and MRI images were used to measure the angle of disc displacement,disc-condyle distance,disc length,and thickness.The degree of disc deformation was assessed.The relationships between clinical symptoms and anterior disc displacement,between anterior disc displacement and both disc morphology and disc-condyle distance,and between disc-condyle distance and disc morphology were analyzed.Results·Among the 90 patients,there were 16 males and 74 females,with a mean age of(28.1±14.5)years.Among the 180 TMJs,175 had clinical symptoms and 5 were asymptomatic.There were 40 joints with no displacement,78 with reducible anterior disc displacement,and 62 with irreducible anterior disc displacement.In the joints with irreducible anterior disc displacement,the proportion of those with two or more symptoms was slightly higher at 62.9%,but the difference was not statistically significant compared with the joints with no displacement or reducible anterior disc displacement.MRI assessment revealed that in the joints with irreducible anterior disc displacement,the proportion of disc deformation type Ⅲ or higher was significantly higher compared with the non-displaced joints(P<0.001).The disc length was significantly shorter(P<0.001),and the intermediate zone thickness was significantly greater(P<0.001)compared with the non-displaced joints.The disc displacement angles at centric closure and maximum opening were also significantly larger(P<0.001).The disc-condyle distance was 3.10(2.70,3.70)mm for non-displaced joints,3.40(3.00,4.00)mm for joints with reducible anterior disc displacement,and 6.60(4.78,7.90)mm for joints with irreducible anterior disc displacement,with significant differences(P<0.001).The disc-condyle distance was 3.10(2.80,3.60)mm for type Ⅰ discs,3.70(3.10,4.60)mm for type Ⅱ discs,5.10(4.00,7.30)mm for type Ⅲ discs,and 6.80(4.98,8.20)mm for type Ⅳ/Ⅴ discs,with significant differences(P<0.001).The disc-condyle distance was negatively correlated with disc length(rs=-0.469,P<0.001),positively correlated with intermediate zone thickness(rs=0.319,P<0.001),and positively correlated with disc displacement angle at centric closure(rs=0.626,P<0.001).Conclusion·With increasing severity of disc deformation,intermediate zone thickness,and disc displacement angle at centric closure,as well as decreasing disc length,the disc-condyle distance increases.The disc-condyle distance is an important indicator for MRI assessment of pathological changes in TMD.
6.Exploring the mechanism of Xin Mai Jia in inhibiting hypertensive car-diac hypertrophy based on network pharmacology and animal exper-iments
Chengjing LEI ; Miao YU ; Yange LI ; Xiaoguang TANG ; Fanrong ZHAO ; Tian-tian ZHU
Chinese Journal of Clinical Pharmacology and Therapeutics 2025;30(1):32-41
AIM:To exploring the mechanism of Xin Mai Jia(XMJ)in inhibiting hypertensive cardiac hypertrophy through network pharmacology and animal experiments.METHODS:Retrieving the ac-tive ingredients and target points of XMJ by search-ing the TCMSP database and related literature re-ports;using the Gene Cards,OMIM,and Drug Bank databases to screen targets for hypertensive cardi-ac hypertrophy;constructing a network of tradi-tional Chinese medicine-active ingredients-poten-tial targets and a protein-protein interaction(PPI)network;using DAVID software for target gene on-tology(GO)functional enrichment analysis and Kyo-to Encyclopedia of Genes and Genomes(KEGG)pathway enrichment analysis;using Auto Dock soft-ware for molecular docking.A spontaneously hy-pertensive rat(SHR)model was established,and hematoxylin-eosin(HE)staining was used to detect the morphology of cardiac tissue and cellular hy-pertrophy,Masson staining was used to detect col-lagen deposition in cardiac tissue,and Western blot to detect the expression of heat shock protein(HSP90AA1),mammalian target of rapamycin(mTOR),peroxisome proliferator-activated receptor y(PPARG),and tumor necrosis factor(TNF-α)in car-diac tissue.RESULTS:A total of 56 potential active ingredients were identified in XMJ,and 5,492 tar-gets related to hypertensive cardiac hypertrophy were obtained.The targets in the core network were ranked according to their Degree values,and four main targets were selected:HSP90AA1,mTOR,PPARG,and TNF-α.The results of HE staining showed that compared with the normal group,the average area of cardiomyocytes in the SHR group increased significantly(P<0.05),while there was no significant change in the XMJ group.The hypertro-phy in the SHR+XMJ group was significantly alleviat-ed(P<0.05).The results of Masson staining showed that compared with the normal group,the levels of interstitial fibrosis and perivascular fibrosis in the SHR group rats increased significantly(P<0.01),and XMJ could significantly reduce the fibrosis levels in the SHR group rats(P<0.01).The results of Western blot showed that compared with the normal group rats,the expression of HSP90AA1 and PPARG in the myocardial tissue of SHR group rats was downregu-lated,mTOR phosphorylation was downregulated,and TNF-α was significantly upregulated(P<0.01).In the SHR+XMJ group,the expression of HSP90AA1,PPARG,and TNF-α in the myocardial tis-sue of rats returned to normal levels,and mTOR phosphorylation returned to normal levels.In the XMJ group,there were no significant changes in the above indicators compared with the normal group rats.CONCLUSION:The mechanism underly-ing the inhibitory effect of XMJ on myocardial cell hypertrophy in hypertension involves a comprehen-sive action through multiple components,multiple targets,and multiple pathways.
7.Establishment and Preliminary Application Analysis of A Multiplex Detection Method for Influenza A and B Virus Antigen Based on Quantum Dot-encoded Microsphere Flow Cytometry Technology
Chengjing XIA ; Baohua LI ; Yanni GUO ; Xiaohe ZHOU ; Runling ZHANG ; Yingbo NIU
Journal of Modern Laboratory Medicine 2024;39(1):126-130
Objective To establish a multiplex assay method for the simultaneous detection of FluA and FluB virus(IBV)antigen based on the flow cytometry(FCM)quantum dot-encoded bead technologies,laying the foundation for the assay of multiple respiratory virus biomarkers.Methods Coupling was performed for FluA and FluB nucleoprotein(NP)monoclonal antibodies using self-made quantum dot-encoded beads,separately.FCM was used to detect known concentrations of FluA and FluB antigens separately and simultaneously,optimize the detection conditions,and establish a joint detection method for FluA and FluB antigens.Compared with the quantitative real-time PCR(qPCR)method,clinical samples were used to evaluate the clinical performance of this joint detection method.Results The joint detection method for FluA and FluB antigens was established,with detection limits of 26.1 pg/ml and 10.7 pg/ml,respectively,and measurement ranges of 15.3~250 000 pg/ml.The joint detection method for clinical sample evaluation was well correlated with the qPCR,with a positive coincidence rate of 57.4%,a negative coincidence rate of 100%,and a total coincidence rate of 71.6%.In addition,the joint detection method was superior to colloidal gold immunochromatographic strip assay commonly used in clinical practice(positive coincidence rate of 56.49%,negative coincidence rate of 99.75%).Conclusion The FCM quantum dot-encoded bead multiplex assay can be used for the joint detection of FluA and FluB antigens,which have a high sensitivity,good specificity and wide detection range.It may lay a good foundation for the multiplex detection of common respiratory viruses,and has clinical application prospects.
8.Psychological defense mechanism and coping style of parents of children with early diagnosis of autism spectrum disorder
Haimei WANG ; Huaying YIN ; Yan LI ; Shuang LUO ; Chengjing OUYANG
Chinese Journal of Modern Nursing 2023;29(8):1075-1080
Objective:To explore the characteristics and correlation of psychological defense mechanism and coping style of parents of children with autism spectrum disorder (ASD) .Methods:This study is a cross-sectional study. From March to August 2021, 223 parents of children with ASD in the Child Healthcare Department of Children's Hospital of Chongqing Medical University were selected by convenient sampling. The parents of the children were investigated with the General Information Questionnaire, the Defense Style Questionnaire (DSQ) and the Simplified Coping Style Questionnaire (SCSQ) . Pearson correlation was used to analyze the correlation between psychological defense mechanism and coping style. Multiple linear stepwise regression was used to analyze the impact of defense styles on coping styles. A total of 223 questionnaires were issued, 210 were recovered, and 206 were valid, with an effective recovery rate of 98.10% (206/210) .Results:Among 206 parents of children with ASD, the scores of mature, intermediate and immature defense types were (4.85±1.20) , (4.33±0.90) and (3.98±1.43) respectively. The scores of positive and negative coping in SCSQ were (1.76±0.53) and (1.18±0.58) respectively. Pearson correlation analysis showed that mature defense mechanism was positively correlated with positive coping ( r=0.26, P<0.01) and negatively correlated with negative coping ( r=-0.22, P<0.01) , and the immature and intermediate defense mechanisms were negatively correlated with positive coping ( r=-0.38, -0.22; P<0.01) and positively correlated with negative coping ( r=0.52, 0.43; P<0.01) . The multiple linear stepwise regression analysis showed that the four defense styles of complaint, expectation, sublimation and dissociation were the influencing factors of parents' positive coping in children with ASD ( P<0.05) , and projection, consumption tendency and passive aggression were the influencing factors of parents' negative coping in children with ASD ( P<0.05) . Conclusions:Although parents of children with ASD mainly use positive coping styles, they often use expectation, avoidance, fantasy and other defensive styles in psychological defense. There is a correlation between defense mechanism and coping styles. We should provide targeted social support for parents of children, improve their psychological defense and maintain positive coping styles.
9.In vitro biomechanical analysis of the second-generation dynamic anterior plate-screw system for quadrilateral area
Haiyang WU ; Xianhua CAI ; Qipeng SHAO ; Ranran SHANG ; Chengjing SONG ; Ximing LIU ; Guodong WANG ; Yanjin LI ; Ruibing FENG ; Hongqi ZHANG
Chinese Journal of Orthopaedics 2021;41(21):1569-1578
Objective:To introduce the standard screw implantation methods and to analyze the biomechanical stability of the second-generation dynamic anterior plate-screw system for quadrilateral area (DAPSQ).Methods:Six adult formalin-preserved corpses were selected to make a complete pelvic specimen. Further, the left high double-column fracture models were made and randomly fixed with second-generation DAPSQ or anterior reconstruction titanium plate and 1/3 tube buttress-plate (ARTPB). The specimens of intact pelvis (IP) group, DAPSQ group and ARTPB group were fixed on a Zwick Z100 material machine and loaded vertically with 200 N, 300 N, 400 N, 500 N, 600 N, 700 N, and 800 N in a simulated sitting position, respectively. The axial displacement and strain changes in the anterior and posterior columns were tested in the three groups. The stiffness was calculated accordingly.Results:The axial compression displacement in the three groups showed an increase trend as well with the vertical load increased from 200 N to 800 N ( F=68.581, P<0.001; F=91.795, P<0.001; F=33.819, P=0.002). The axial displacement in ARTPB group was significantly larger than that in DAPSQ group and IP group ( P<0.05), while the difference between DAPSQ and IP groups was not significant ( P>0.05). Under the vertical load of 600 N, the pelvic axial stiffness of IP group, DAPSQ group, and ARTPB group were 220.72±70.33 N/mm, 185.68±48.49 N/mm and 135.83±60.58 N/mm, respectively. The axial stiffness of ARTPB group was significantly lower than that in DAPSQ group and IP group ( t=5.345, P=0.003; t=6.443, P=0.001), while the difference between DAPSQ and IP groups was not significant ( t=2.138, P=0.086). There were no significant differences of the strain values in anterior column among the three groups during the load increasing from 200 N to 800 N ( P>0.05). With the load increasing from 500 N to 800 N, the strain values of the posterior column in ARTPB group were significantly greater than those of IP and DAPSQ groups ( P<0.05). However, the differences between IP and DAPSQ groups were not statistically significant in strain values of the posterior column ( P>0.05). Conclusion:Compared with anterior reconstruction titanium plate and 1/3 tube buttress-plate, acetabular double-column fracture model fixed with the second-generation DAPSQ has less axial compression displacement but with greater axial stiffness. The stress change in the posterior columns of the acetabulum is like in IP. Therefore, the second-generation DAPSQ has reliable biomechanical stability.
10.Relationship between peripheral blood neutrophil lymphocyte ratio and osteoporosis in Chinese elderly women
Yanlan QIN ; Lixin XU ; Dong PENG ; Yi WANG ; Chunfen LI ; Yanlin ZHOU ; Tian CHEN ; Peng ZHANG ; Chengjing TANG ; Juan XIA ; Yan LI
Chinese Journal of Primary Medicine and Pharmacy 2020;27(6):708-713
Objective:To explore the association of peripheral blood neutrophil lymphocyte ratio(NLR) with primary osteoporosis (POP) in Chinese elderly women.Methods:From December 2015 to April 2019, a total of 788 elderly women in Chongqing Three Gorges Central Hospital were included in this study.They were divided into three groups according to bone mineral density: 242 cases of osteopenia, 206 cases of normal bone mineral density and 340 cases of osteoporosis.Their height, weight, statuses of bone of left femoral neck and results of blood tests were recorded, and the values of BMI, NLR and OSTA were calculated.The SPSS statistics software was used to analyze the differences of parameters among the three groups.Logistic regression analysis was used to get significant independent related factors for osteoporosis.The relationship of NLR and OSTA with T-score of left femoral neck was confirmed by Pearson correlation test.ROC curves were used to define the values of NLR and OSTA in diagnosis of osteoporosis.Results:There were statistically significant differences in age(median values: 66, 68 and 70, χ 2=71.596, P<0.001), BMI(median values: 23.46, 24.04 and 25.415, χ 2=64.936, P<0.001) and NLR(median values: 1.97, 2.435 and 2.84, χ 2=106.218, P<0.001) among the three groups(all P<0.01). Logistic regression analysis demonstrated that age, BMI and NLR were all independent significant related factors.There was correlation of NLR, OSTA with T-score of left femoral neck.In diagnosis of osteoporosis, the cut-off value, maximum Youden index, sensitivity and specificity were 2.395, 0.299, 70.3%, 59.6% for NLR, and -1.315, 0.174, 73.6%, 43.5% for OSTA. Conclusion:NLR has intermediate sensitivity and specificity in screening POP in Chinese elderly women, and deserves future researches.

Result Analysis
Print
Save
E-mail