OBJECTIVE: To evaluate the early effectiveness of navigation-free robot-assisted total knee arthroplasty (TKA) compared to traditional TKA in the treatment of knee osteoarthritis combined with extra-articular deformities. METHODS: The clinical data of 30 patients with knee osteoarthritis combined with extra-articular deformities who met the selection criteria between June 2019 and January 2024 were retrospectively analyzed. Fifteen patients underwent CORI navigation-free robot-assisted TKA and intra-articular osteotomy (robot group) and 15 patients underwent traditional TKA and intra-articular osteotomy (traditional group). There was no significant difference in age, gender, body mass index, affected knee side, extra-articular deformity angle, deformity position, deformity type, and preoperative knee range of motion, American Knee Society (KSS) knee score and KSS function score, and lower limb alignment deviation between the two groups ( P>0.05). The operation time, intraoperative blood loss, and complications of the two groups were recorded and compared. The knee range of motion and lower limb alignment deviation were recorded before operation and at 6 months after operation, and the knee joint function was evaluated by KSS knee score and function score. RESULTS: There was no significant difference in operation time between the two groups ( P>0.05); the intraoperative blood loss in the robot group was significantly less than that in the traditional group ( P<0.05). Patients in both groups were followed up 6-12 months, with an average of 8.7 months. The incisions of all patients healed well, and there was no postoperative complication such as thrombosis or infection. At 6 months after operation, X-ray examination showed that the position of the prosthesis was good in both groups, and there was no loosening or dislocation of the prosthesis. The knee joint range of motion, the lower limb alignment deviation, and the KSS knee score and KSS function score significantly improved in both groups ( P<0.05) compared to preoperative ones. The changes of lower limb alignment deviation and KSS function score between pre- and post-operation in the robot group were significantly better than those in the traditional group ( P<0.05), while the changes of other indicators between pre- and post-operation in the two groups were not significant ( P>0.05). CONCLUSION Compared to traditional TKA, navigation-free robot-assisted TKA for knee osteoarthritis with extra-articular deformities results in less intraoperative blood loss, more precise reconstruction of lower limb alignment, and better early effectiveness. However, long-term effectiveness require further investigation.
Humans ; Arthroplasty, Replacement, Knee/methods* ; Osteoarthritis, Knee/surgery* ; Robotic Surgical Procedures/methods* ; Male ; Female ; Retrospective Studies ; Range of Motion, Articular ; Middle Aged ; Aged ; Treatment Outcome ; Osteotomy/methods* ; Knee Joint/physiopathology* ; Operative Time

Objective:To compare the efficacy of cannulated screw internal fixation combined with quadratus femoris bone flap with preservation of the posterior superior retinaculum and cannulated screw internal fixation alone in the treatment of femoral neck fracture in young and middle-aged patients.Methods:A retrospective cohort study was conducted to analyze the clinical data of 83 young and middle-aged patients with femoral neck fracture admitted to the 920th Hospital of Joint Logistic Support Force of PLA from January 2018 to January 2023, including 56 males and 27 females, aged 28-55 years [(42.7±3.2)years]. According to Garden classification, the fractures were classified as type III in 22 patients and type IV in 61. Based on Pauwels classification, the fractures were classified as type I in 15 patients, type II in 38 and type III in 30. Forty patients were treated with cannulated screw internal fixation combined with modified quadratus femoris bone flap (cannulated screw combined with bone flap group) and 43 with cannulated screw internal fixation alone (cannulated screw group). The two groups were compared in terms of the operation time, intraoperative blood loss, time to weight-bearing, length of hospital stay, and wound healing. The visual analogue scale (VAS) scores and Harris hip function scores at 1, 3, 6, 12 months after surgery and at the last follow-up. The postoperative complication rate was detected.Results:All the patients were followed up for 20-70 months [(40.0±1.2)months]. The operation time and intraoperative blood loss were (105.2±2.7)minutes and (100.6±16.3)ml in the cannulated screw combined with bone flap group, which were longer or more than (92.4±4.7)minutes and (92.5±14.6)ml in the cannulated screw group ( P<0.01). The time to weight-bearing was (12.1±1.4)weeks in the cannulated screw combined with bone flap group, shorter than (23.6±1.2)weeks in the cannulated screw group ( P<0.01). There was no statistically significant difference in the length of hospital stay between the two groups (P>0.05). The incisions in both groups were healed by first intention. At 1 month after surgery, no statistically significant difference was observed in VAS scores between the two groups ( P>0.05); at 3, 6, 12 months after surgery and at the last follow-up, the VAS scores were (6.6±0.2)points, (4.5±0.3)points, (3.2±0.5)points, and (2.6±0.4)points in the cannulated screw combined with bone flap group, lower than (7.0±0.1)points, (5.2±0.2)points, (3.9±0.4)points, and (3.3±0.1)points in the cannulated screw group ( P<0.05 or 0.01). At 1 and 3 months after surgery, no statistically significant difference was observed in the Harris hip function scores between the two groups ( P>0.05); at 6, 12 months after surgery and at the last follow-up, the Harris hip function scores were (82.2±1.7)points, (90.0±1.4)points, and (91.6±1.0)points in the cannulated screw combined with bone flap group, higher than (75.2±1.7)points, (83.4±1.9)points, and (85.2±0.7)points in the cannulated screw group ( P<0.01). At the last follow-up, in the cannulated screw combined with bone flap group, the Harris hip function was rated excellent in 32 patients, good in 5, and fair in 3, with an excellent and good rate of 92.5%, while in the cannulated screw group, the Harris hip function was rated excellent in 20 patients, good in 13, and fair in 10, with an excellent and good rate of 76.7% ( P<0.05). The postoperative complication rate was 5.0% (2/40) in the cannulated screw combined with bone flap group, significantly lower than 23.2% (10/43) in the cannulated screw group ( P<0.05). Conclusion:Compared with cannulated screw internal fixation alone, cannulated screw internal fixation combined with quadratus femoris bone flap with preservation of the posterior superior retinaculum has the advantages of earlier weight-bearing, less pain, better recovery of hip joint function, and lower incidence of postoperative complications in the treatment of femoral neck fracture in young and middle-aged patients, despite longer operation time and more intraoperative blood loss.

A deep learning-based method for recognizing the minutiae in fingerprint,as well as a Python programming-based evaluation system for quantifying the evidence value of fingerprint was proposed.Firstly,latent fingerprints,which were developed using a series of fluorescent nanomaterials synthesized by chemical methods,were used as unknown fingerprint(UKFP),while ink impressed fingerprints were used as known fingerprint(KFP).Then,the bifurcations and terminations in minutiae were recognized using the improved YOLOv8 deep learning model.After that,the similarity index(Sim.)of UKFP vs KFP were calculated by analyzing the angle similarity factor(α)and the curve similarity factor(β)between UKFP and KFP,meanwhile,the sensitivity index(Sen.)were calculated by analyzing the fineness factor(γ)between UKFP and KFP.The evidence value(EV)of fingerprint was thus obtained by the combination of Sim.and Sen..The calculation formulas for above evaluation factors(i.e.α,β and γ),evaluation indexes(i.e.Sim.and Sen.),and EV were also put forward.Finally,the evaluation system for quantifying the evidence value of fingerprint was established,the feasibility and reliability of this system were verified,and the external factors that impacted on Sim.,Sen.,and EV were investigated in detail.The Python-based evaluation system for quantifying the evidence value of fingerprint could achieve the goals objectively,comprehensively,accurately and efficiently,exhibiting easy operability,high efficiency,responsiveness and reliability.This research was expected to provide beneficial references for quantitatively evaluating and thoroughly developing the evidence value.

The influence of material properties on fingerprint development effects were systematically studied.Firstly,carbon dots/NaYF4 and Cu nanoclusters/starch nanocomposites respectively possessing different fluorescent intensities and dual fluorescent colors,as well as NaYF4 micro-/nano-materials exhibiting different morphologies,sizes,and surface properties were chemically synthesized and further used for latent fingerprint development.Then,the developing effects were comprehensively evaluated by visual analysis combining with spectral characterization and Python-based calculation.Finally,the influences of material properties on latent fingerprint development were quantitatively evaluated from three dimensions including contrast,sensitivity,and selectivity.The fluorescence properties of developing materials and substrates could significantly affect the developing contrast,namely,the stronger the developing signal,the higher the contrast;the weaker the background noise,the higher the contrast.The sizes and morphologies of the developing materials could respectively influence the quantity and quality of developed minutiae,and significantly affect the developing sensitivity,namely,the smaller the particle size of developing materials,the more the quantity of developed minutiae and the higher the sensitivity;the smaller the surface area of developing materials,the higher the quality of developed minutiae and the higher the sensitivity.The surface properties together with the sizes and morphologies of developing materials could influence their adsorption performances,and significantly affect the developing selectivity,namely,the stronger the specific adsorption of developing materials with fingerprint substance,and the weaker the non-specific adsorption of developing materials with substrate,the higher the selectivity.Moreover,the fingerprint development using the materials with suitable surface area and appropriate mass would have a high selectivity.

A mounting body of research suggests that circRNAs significantly contribute to the develop-ment of myocardial fibrosis.The microarray results of human circular RNA expression profile indicated that circHERC4_041 expression increased in the myocardium of patients with heart failure,RT-qPCR a-nalysis confirmed that the myocardial expression level of circHERC4_041 in individuals with heart failure were considerably elevated compared to that in healthy organ donors.Fluorescence in situ hybridization(FISH)confirmed that circHERC4_041 was abundant in the cytoplasm of human cardiomyocyte AC16.Overexpression of circHERC4_041 in mouse myocardial fibroblasts(mCFs)mediated by adenovirus in-hibited the expression of fibrosis-related proteins in mCFs.Experiments involving cell proliferation,wound healing,and Transwell assays demonstrated that overexpression of circHERC4_041 suppressed the growth and mobility of mCFs(P＜0.001).Sequence analysis results suggested that circHERC4_041 con-tains potential ribosome entry sequence(IRES)and open reading frame(ORF).Western blot confirmed that circHERC4_041 could translate the 516 amino acid HERC4-516aa protein,which was mainly located in the cytoplasm of the cell.Cell functional experiments confirmed that circHERC4_041 inhibited the fi-brotic phenotype of mCFs by specifically translating HERC4-516aa(P＜0.05).The specific interaction between HERC4-516aa and transglutaminase 2(TGM2)was confirmed by IP-MS screening and Co-IP i-dentification.Further results found that the degradation of TGM2 was promoted through proteasome path-way.The overexpression of TGM2 in mCFs facilitated by adenoviral vectors could counteract the suppres-sive effects of HERC4-516aa on the fibrotic phenotype of mCFs.Therefore,this study confirmed that the HERC4-516aa protein translated by circHERC4_041 can specifically bind to TGM2 to inhibit the fibrotic phenotype of myocardial fibroblasts.

Objective:To compare the efficacy of cannulated screw internal fixation combined with quadratus femoris bone flap with preservation of the posterior superior retinaculum and cannulated screw internal fixation alone in the treatment of femoral neck fracture in young and middle-aged patients.Methods:A retrospective cohort study was conducted to analyze the clinical data of 83 young and middle-aged patients with femoral neck fracture admitted to the 920th Hospital of Joint Logistic Support Force of PLA from January 2018 to January 2023, including 56 males and 27 females, aged 28-55 years [(42.7±3.2)years]. According to Garden classification, the fractures were classified as type III in 22 patients and type IV in 61. Based on Pauwels classification, the fractures were classified as type I in 15 patients, type II in 38 and type III in 30. Forty patients were treated with cannulated screw internal fixation combined with modified quadratus femoris bone flap (cannulated screw combined with bone flap group) and 43 with cannulated screw internal fixation alone (cannulated screw group). The two groups were compared in terms of the operation time, intraoperative blood loss, time to weight-bearing, length of hospital stay, and wound healing. The visual analogue scale (VAS) scores and Harris hip function scores at 1, 3, 6, 12 months after surgery and at the last follow-up. The postoperative complication rate was detected.Results:All the patients were followed up for 20-70 months [(40.0±1.2)months]. The operation time and intraoperative blood loss were (105.2±2.7)minutes and (100.6±16.3)ml in the cannulated screw combined with bone flap group, which were longer or more than (92.4±4.7)minutes and (92.5±14.6)ml in the cannulated screw group ( P<0.01). The time to weight-bearing was (12.1±1.4)weeks in the cannulated screw combined with bone flap group, shorter than (23.6±1.2)weeks in the cannulated screw group ( P<0.01). There was no statistically significant difference in the length of hospital stay between the two groups (P>0.05). The incisions in both groups were healed by first intention. At 1 month after surgery, no statistically significant difference was observed in VAS scores between the two groups ( P>0.05); at 3, 6, 12 months after surgery and at the last follow-up, the VAS scores were (6.6±0.2)points, (4.5±0.3)points, (3.2±0.5)points, and (2.6±0.4)points in the cannulated screw combined with bone flap group, lower than (7.0±0.1)points, (5.2±0.2)points, (3.9±0.4)points, and (3.3±0.1)points in the cannulated screw group ( P<0.05 or 0.01). At 1 and 3 months after surgery, no statistically significant difference was observed in the Harris hip function scores between the two groups ( P>0.05); at 6, 12 months after surgery and at the last follow-up, the Harris hip function scores were (82.2±1.7)points, (90.0±1.4)points, and (91.6±1.0)points in the cannulated screw combined with bone flap group, higher than (75.2±1.7)points, (83.4±1.9)points, and (85.2±0.7)points in the cannulated screw group ( P<0.01). At the last follow-up, in the cannulated screw combined with bone flap group, the Harris hip function was rated excellent in 32 patients, good in 5, and fair in 3, with an excellent and good rate of 92.5%, while in the cannulated screw group, the Harris hip function was rated excellent in 20 patients, good in 13, and fair in 10, with an excellent and good rate of 76.7% ( P<0.05). The postoperative complication rate was 5.0% (2/40) in the cannulated screw combined with bone flap group, significantly lower than 23.2% (10/43) in the cannulated screw group ( P<0.05). Conclusion:Compared with cannulated screw internal fixation alone, cannulated screw internal fixation combined with quadratus femoris bone flap with preservation of the posterior superior retinaculum has the advantages of earlier weight-bearing, less pain, better recovery of hip joint function, and lower incidence of postoperative complications in the treatment of femoral neck fracture in young and middle-aged patients, despite longer operation time and more intraoperative blood loss.

A mounting body of research suggests that circRNAs significantly contribute to the develop-ment of myocardial fibrosis.The microarray results of human circular RNA expression profile indicated that circHERC4_041 expression increased in the myocardium of patients with heart failure,RT-qPCR a-nalysis confirmed that the myocardial expression level of circHERC4_041 in individuals with heart failure were considerably elevated compared to that in healthy organ donors.Fluorescence in situ hybridization(FISH)confirmed that circHERC4_041 was abundant in the cytoplasm of human cardiomyocyte AC16.Overexpression of circHERC4_041 in mouse myocardial fibroblasts(mCFs)mediated by adenovirus in-hibited the expression of fibrosis-related proteins in mCFs.Experiments involving cell proliferation,wound healing,and Transwell assays demonstrated that overexpression of circHERC4_041 suppressed the growth and mobility of mCFs(P＜0.001).Sequence analysis results suggested that circHERC4_041 con-tains potential ribosome entry sequence(IRES)and open reading frame(ORF).Western blot confirmed that circHERC4_041 could translate the 516 amino acid HERC4-516aa protein,which was mainly located in the cytoplasm of the cell.Cell functional experiments confirmed that circHERC4_041 inhibited the fi-brotic phenotype of mCFs by specifically translating HERC4-516aa(P＜0.05).The specific interaction between HERC4-516aa and transglutaminase 2(TGM2)was confirmed by IP-MS screening and Co-IP i-dentification.Further results found that the degradation of TGM2 was promoted through proteasome path-way.The overexpression of TGM2 in mCFs facilitated by adenoviral vectors could counteract the suppres-sive effects of HERC4-516aa on the fibrotic phenotype of mCFs.Therefore,this study confirmed that the HERC4-516aa protein translated by circHERC4_041 can specifically bind to TGM2 to inhibit the fibrotic phenotype of myocardial fibroblasts.

A serious of rare earth luminescent micro/nano-materials with various properties were synthesized via chemical method for fluorescent development of latent fingerprints(LFPs).Three evaluation indexes namely contrast,sensitivity and selectivity were introduced to evaluate the effects of LFP development.Quantitative formulas for calculating the contrast,sensitivity and selectivity were further put forward,and a quality evaluation system based on Python was thus established.In addition,the objective evaluation value was finally confirmed to be consistent with the subjective visual judgment.The reproducibility of this evaluation method was finally confirmed.The effects of luminescence intensity and color of developing materials on the contrast,particle size of developing materials on the sensitivity,and micromorphology and surface property of developing materials on the selectivity were discussed in detail.Five effective ways were also proposed to promote the quality of LFP development,such as increasing the luminescence intensity,tuning the luminescence color,decreasing the particle size,adjusting the micromorphology,and modifying the surface property.This quality evaluation system based on Python could evaluate the effects of LFP development objectively,accurately and comprehensively,exhibiting easy operability,high efficiency,sensitive response,accurate and reliable results,and wide applicability,which would provide beneficial references for the reasonable selection of LFP development methods as well as objective evaluation of evidence value.

Objective To investigate the preliminary clinical effect of closed reduction and cannulated nail internal fixa-tion for femoral neck fracture assisted by robot navigation and positioning system.Methods From July 2019 to January 2020,16 cases of femoral neck fracture(navigation group)were treated with closed reduction and internal fixation guided by robot system,including 7 males and 9 females,aged 25 to 72 years old with an average of(53.61±5.45)years old;Garden classification of fracture:3 cases of type Ⅰ,3 cases of type Ⅱ,8 cases of type Ⅲ,2 cases of type Ⅳ.Non navigation group(control group):20 cases of femoral neck fracture were treated with closed reduction and hollow nail internal fixation,8 males and 12 females,aged 46 to 70 years old with an average of(55.23±4.64)years old;Garden type Ⅰ in 2 cases,type Ⅱ in 4 cases,type Ⅲ in 11 cases,type Ⅳ in 3 cases.The operation time,fluoroscopy times,guide needle drilling times,screw adjustment times,intraoperative bleeding volume and other indicators of two groups were evaluated.Results Both groups were followed up for 12 to 18 months with an average of(15.6±2.8)months.The fractures of both groups were healed without delayed union and nonunion.There was no significant difference in healing time between two groups(P=0.782).There was no significant differ-ence in Harris scores between two groups at the last follow-up(P=0.813).There was no significant difference in operation time between two groups(P＞0.05).There were significant differences between two groups in fluoroscopy times,guide needle drilling times,hollow screw replacement times,and intraoperative bleeding volume(P＜0.05).Conclusion Closed reduction and hollow screw internal fixation assisted by robot navigation system for femoral neck fracture has the advantages of minimally invasive operation,precise screw placement,and reduction of X-ray radiation damage during operation.

Objective:To investigate the mid-and long-term clinical efficacy of modified Colonna arthroplasty in the treatment of unilateral dislocation type developmental dysplasia of hip (DDH) in adolescents.Methods:A total of 28 adolescent DDH patients with unilateral dislocation who underwent modified Colonna capsular arthroplasty from January 2016 to January 2018 in the 920th Hospital of Joint Logistics Support Force of People's Liberation Army were retrospectively analyzed. There were 4 males and 24 females, aged 16.5±5.0 years (range, 10-25 years). The mean body mass index was 21.2±1.1 kg/m 2 (range, 18.7-24.1 kg/m 2). According to DDH classification, 10 cases were Tonnis type III and 18 cases were Tonnis type IV. The postoperative lateral center-edge angle, acetabular coverage, femoral anteversion angle and leg length discrepancy were measured. The operation time, intraoperative blood loss, visual analogue scale (VAS) of hip pain, Harris hip score (HHS) and congenital dislocation of the hip score were recorded. Results:All patients successfully completed the operation and were followed up for 72.1±5.2 months (range, 60-84 months). The operation time was 81.6±4.3 min (range, 70-90 min), the intraoperative blood loss was 177.5±12.6 ml (range, 160-200 ml), and the hospital stay was 6.8±0.7 days (range, 6-9 days). The VAS score of the hip joint was 1.8±0.6 before operation and 2.3±0.6 at the last follow-up, and the difference was not statistically significant ( t=2.845, P=0.224). The preoperative HHS score was 57.1±5.9, and it increased to 87.3±4.0 at the last follow-up, and the difference was statistically significant ( t=-22.141, P=0.001). At the last follow-up, the femoral anteversion angle was 17.0°±1.5°, which was lower than that before operation 41.6°±2.4°, with a statistically significant difference ( t=-44.868, P=0.008). The leg length discrepancy was 10.2±2.3 mm, which was lower than that before operation (26.4±6.1 mm), with a statistically significant difference ( t=-12.892, P<0.001). The lateral center-edge angle was 28° (26°, 30°), and the acetabular coverage rate was 78% (76%, 79%). The curative effect evaluation standard score of congenital dislocation of the hip was 24 (16.7, 25.7) points, including 7 excellent cases, 14 good cases, 4 fair cases, and 3 poor cases. The excellent and good rate was 75% (21/28). Conclusion:The modified Colonna arthroplasty for the treatment of unilateral dislocation DDH in adolescents has good mid-and long-term hip function recovery and radiographic improvement.