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Efficacy of graphene nanocomposites for air disinfection in dental clinics: A randomized controlled study

World Journal of clinical Cases 2024年第28期12卷 6173-6179页

作者： Ya-Qiong Ju Xiang-Hua Yu Jing Wu Ying-Hui Hu Xiang-Yong Han Dan Fang Department of Nursing Minhang District Dental ClinicShanghai 201107China Department of Medical Sciences Minhang District Dental ClinicShanghai 201107China Department of orthopedics Center for Spinal Minimally Invasive ResearchShanghai Jiao Tong UniversityShanghai 201107China

BACKGROUND Aerosols containing disease-causing microorganisms are produced during oral diagnosis and treatment can cause secondary *** To investigate the use of graphene material for air disinfection in dental clinics by leveraging its adsorption and antibacterial *** Patients who received ultrasonic cleaning at our hospital from April 2023 to April *** were randomly assigned to three groups(n=20 each):Graphene nanocomposite material suction group(Group A),ordinary filter suction group(Group B),and no air suction device group(Group C).The air quality and air colony count in the clinic rooms were assessed before,during,and after the ***,bacterial colony counts were obtained from the air outlets of the suction devices and the filter screens in Groups A and *** Before ultrasonic cleaning,no significant differences in air quality PM2.5 and colony counts were observed among the three ***,significant differences in air quality PM2.5 and colony counts were noted among the three groups during ultrasonic cleaning and after ultrasonic ***,the number of colonies on the exhaust port of the suction device and the surface of the filter were significantly lower in Group A than in Group B(P=0.000 and P=0.000,respectively).CONCLUSION Graphene nanocomposites can effectively sterilize the air in dental clinics by exerting their antimicrobial effects and may be used to reduce secondary pollution.

关键词： Graphene Nanocomposites Oral clinic Air disinfection Secondary contamination

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Blood metal concentrations and cardiac structure and function in total joint arthroplasty patients

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World Journal of orthopedics 2024年第8期15卷 773-782页

作者： Peter C Brennan Stephanie M Peterson Thomas J O'Byrne Mariana L Laporta Cody C Wyles Paul J Jannetto Garvan C Kane Maria Vassilaki Hilal Maradit Kremers Department of Orthopedic Surgery Mayo ClinicRochesterMN 55905United States Department of Quantitative Health Sciences Mayo ClinicRochesterMN 55905United States Department of Anesthesiology and Perioperative Medicine Mayo ClinicRochesterMN 55905United States Department of Laboratory Medicine and Pathology Mayo ClinicRochesterMN 55905United States Department of Cardiovascular Diseases Mayo ClinicRochesterMN 55905United States

BACKGROUND There is concern regarding potential long-term cardiotoxicity with systemic distribution of metals in total joint arthroplasty(TJA)*** To determine the association of commonly used implant metals with echocardiographic measures in TJA *** The study comprised 110 TJA patients who had a recent history of high chromium,cobalt or titanium *** underwent two-dimensional,three-dimensional,Doppler and speckle-strain transthoracic echocardiography and a blood draw to measure metal *** and sex-adjusted linear and logistic regression models were used to examine the association of metal concentrations(exposure)with echocardiographic measures(outcome).RESULTS Higher cobalt concentrations were associated with increased left ventricular end-diastolic volume(estimate 5.09;95%CI:0.02-10.17)as well as left atrial and right ventricular dilation,particularly in men but no changes in cardiac *** titanium concentrations were associated with a reduction in left ventricle global longitudinal strain(estimate 0.38;95%CI:0.70 to 0.06)and cardiac index(estimate 0.08;95%CI,-0.15 to-0.01).CONCLUSION Elevated cobalt and titanium concentrations may be associated with structural and functional cardiac changes in some *** studies are warranted to better understand the systemic effects of metals in TJA patients.

关键词： Total joint arthroplasty Metal-on-metal Cardiotoxicity Heart failure Echocardiography Cobalt

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Alterations in Serum Lipids and Lipoproteins Induced by Neoadjuvant Chemotherapy in Patients with Osteosarcoma around the Knee Joint:A Retrospective Analysis

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Current Medical Science 2024年第4期44卷 741-747页

作者： Su-guo WANG Yong-gang WANG Guo-wei QIAN Li-na TANG Xin ZHOU Dong-dong CHENG Chen-liang ZHOU Qing-cheng YANG Zan SHEN Gao-zhong HUANG Hong-tao LI Department of General Medicine Shenzhen Third People's HospitalShenzhen 518112China Department of VIP clinic Shanghai Jiao Tong University Afiliated Sixth People's HospitalShanghai 200233China Department of Oncology Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai 200233China Cancer Research Institute of Jilin University the First Hospital of Jilin UniversityChangchun 130021China Department of orthopedics Shanghai Jiao Tong University Afiliated Sixth People's HospitalShanghai 200233China

Objective To investigate the serum lipid profiles of patients with localized osteosarcoma around the knee joint before and after neoadjuvant *** After retrospectively screening the data of 742 patients between January 2007 and July 2020,50 patients aged 13 to 39 years with Enneking stage II disease were included in the *** lipid levels,including total cholesterol(TC),triglycerides(TG),high-density lipoprotein cholesterol(HDL-C),low-density lipoprotein cholesterol(LDL-C),lipoprotein-α[Lp(a)],and apolipoprotein A1,B,and E(ApoA1,ApoB,and ApoE),and clinicopathological characteristics were collected before and after neoadjuvant *** The mean levels of TC,TG,and ApoB were significantly increased following neoadjuvant chemotherapy(16%,38%,and 20%,respectively,*** values;P<0.01).The mean levels of LDL-C and ApoE were also 19%and 16%higher,respectively(P<0.05).No correlation was found between the pretreatment lipid profile and the histologic response to *** increase in Lp(a)was strongly correlated with the Ki-67 index(R=0.31,P=0.023).Moreover,a trend toward longer disease-free survival(DFS)was observed in patients with decreased TG and increased LDL-C following chemotherapy,although this difference was not statistically significant(P=0.23 and P=0.24,respectively).Conclusion Significant elevations in serum lipids were observed after neoadjuvant chemotherapy in patients with localized *** was no prognostic significance of pretreatment serum lipid levels on histologic response to neoadjuvant *** scale of increase in serum Lp(a)might have a potential prognostic role in *** with increased LDL-C or reduced TG after chemotherapy seem to exhibit a trend toward favorable DFS.

关键词： osteosarcoma neoadjuvant chemotherapy serum lipids

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Exertional calf pain at kilometer five - Finding the cause

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Sports Medicine and Health Science 2024年第1期6卷 89-93页

作者： Samuel A.Renier Angela M.Voight Emilee J.Trost William O.Roberts St.John's Hospital Family Medicine Residency Department of Family Medicine and Community HealthUniversity of Minnesota Medical SchoolMinneapolisMNUSA Summit orthopedics Woodbury Clinic2090 Woodwinds Dr.WoodburyMN55125USA Minnesota Distance Elite 4007Forest RdMinneapolisMN55416USA Department of Family Medicine and Community Health University of Minnesota Medical School516 Delaware St.SE6-240 Phillips-Wangensteen BuildingMinneapolisMN55455USA

A 23-year-old professional distance runner with several years of exertional calf pain was diagnosed with a unique mixed type III and functional popliteal artery entrapment syndrome(PAES).Surgical reduction of the obstructing tissue allowed her to return to professional *** case highlights the importance of including PAES in the differential for chronic intermittent lower extremity claudication and outlines the work-up required to diagnose this vascular obstruction in younger athletes.

关键词： Claudication Lower leg pain Vascular imaging PAES FPAES Popliteal entrapment

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Sciatic nerve repair using adhesive bonding and a modified conduit

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Neural Regeneration Research 2014年第6期9卷 594-601页

作者： Xiangdang Liang Hongfei Cai Yongyu Hao Geng Sun Yaoyao Song Wen Chen Department of orthopedics General Hospital of Chinese PLA Wei Zikeng clinic of General Armament Department of Chinese PLA Department of orthopedics 252 Hospital of Chinese PLA

When repairing nerves with adhesives, most researchers place glue directly on the nerve stumps, but this method does not fix the nerve ends well and allows glue to easily invade the nerve ends. In this study, we established a rat model of completely transected sciatic nerve injury and re- paired it using a modified 1 cm-length conduit with inner diameter of 1.5 mm. Each end of the cylindrical conduit contains a short linear channel, while the enclosed central tube protects the nerve ends well Nerves were repaired with 2-octyl-cyanoacrylate and suture, which complement the function of the modified conduit. The results demonstrated that for the same conduit, the av- erage operation time using the adhesive method was much shorter than with the suture method. No significant differences were found between the two groups in sciatic function index, motor evoked potential latency, motor evoked potential amplitude, muscular recovery rate, number of medullated nerve fibers, axon diameter, or medullary sheath thickness. Thus, the adhesive method for repairing nerves using a modified conduit is feasible and effective, and reduces the operation time while providing an equivalent repair effect.

关键词： nerve regeneration nerve repair adhesive anastomosis cyanoacrylate nerve conduits sciatic nerve electrophysiology muscle recovery the International Technology Cooperation Program neural regeneration

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Classification of femoral neck fractures according to pauwels: interpretation and confusion ——Reinterpretation: a simplified classification based on mechanical considerations

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Journal of Biomedical Science and Engineering 2010年第6期3卷 638-643页

作者： Andrej Maria Nowakowski Peter Emil Ochsner Martin Majewski Orthopedic Department University of Basel clinic for orthopedics lucerne Klinik St. Anna

ABSTRACT The Pauwels Classification of femoral neck fractures, initially published in 1935, is used world-wide. Unfortunately, modern textbooks give varying angle and anatomic specifications between the classified fracture grades. This inconsistency is perpetuated in the literature, so that it is difficult to compare conclusions made by different authors. Pauwels himself left room for interpretation. He published two studies, one in 1935 and one in 1973, each including 3 diagrams. The 1935 version cited an angle of 8° representing the vector of static forces acting on the femoral head. The 1973 diagrams, however, cited an angle of 16° to represent dynamic forces, without changing the angle from horizontal. This already complex sche- me is complicated by the fact that it depends on other factors such as femoral neck shaft (CCD) angle, femoral neck and head diameter, and/or distance of the fracture from the center of the femoral head. The multitude of factors argues against a rigid classification based on fixed angles from horizontal. Pauwels himself did not establish fixed critical angles between the fracture grades. In his own explanation of the system, he placed more value on mechanical considerations such as compression stress, shear stress, tensile force, shearing force, and torque. We propose therefore a simplified version of the Pauwels Classification: Grade I for fractures impacted in valgus, Grade II for fractures without free torque, and Grade III for fractures with free torque.

关键词： Pauwels Garden Classification Femoral Neck Fracture

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RANK-ligand and osteoprotegerin as biomarkers in the differentiation between periprosthetic joint infection and aseptic prosthesis loosening

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World Journal of orthopedics 2017年第4期8卷 342-349页

作者： Max J Friedrich Matthias D Wimmer Jan Schmolders Andreas C Strauss Milena M Ploeger Hendrik Kohlhof Dieter C Wirtz Sascha Gravius Thomas M Randau Department of orthopedics and Trauma Surgery University Clinic of Bonn

AIM To assess serum levels of RANK-ligand(RANKL) and osteoprotegerin(OPG) as biomarkers for periprosthetic joint infection(PJI) and compare their accuracy with standard *** One hundred and twenty patients presenting with a painful total knee or hip arthroplasty with indication for surgical revision were included in this prospective clinical trial. Based on standard diagnostics(joint aspirate, microbiological, and histological samples) and Musculoskeletal Infection Society consensus classification,patients were categorized into PJI, aseptic loosening,and control groups. Implant loosening was assessed radiographically and intraoperatively. Preoperative serum samples were collected and analyzed for RANKL, OPG, calcium, phosphate, alkaline phosphatase(AP), and the bone-specific subform of AP(b AP). Statistical analysis was carried out, testing for significant differences between the three groups and between stable and loose implants. RESULTS All three groups were identical in regards to age, gender, and joint distribution. No statistically significant differences in the serum concentration of RANKL(P = 0.16) and OPG(P = 0.45) were found between aseptic loosening and PJI, with a trend towards lower RANKL concentrations and higher OPG concentrations in the PJI group. The RANKL/OPG ratio was significant for the comparison between PJI and non-PJI(P = 0.005). A ratio > 60 ruled out PJI in all cases(specificity: 100%, 95%CI: 89, 11% to 100.0%) but only 30% of non-PJI patients crossed this threshold. The positive predictive value remained poor at any cut-off. In the differentiation between stable and loose implants, none of the parameters measured(calcium, phosphate, AP, and b AP) showed a significant difference, and only AP and b AP measurements showed a tendency towards higher values in the loosened group(with P = 0.09 for AP and P = 0.19 for b AP). CONCLUSION Lower RANKL and higher OPG concentrations could be detected in PJI, without statistical significance.

关键词： Aseptic loosening Diagnostic RANK-ligand Periprosthetic joint infection Biomarker Osteoprotegerin

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The estrogen metabolite 2-methoxyestradiol regulates eukaryotic initiation factor 4E(eIF4E)and inhibits protein synthesis in MG63 osteosarcoma cells

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Genes & Diseases 2016年第2期3卷 153-158页

作者： Avudaiappan Maran Kristen L.Shogren Michael J.Yaszemski Department of orthopedics Mayo ClinicRochesterMN 55905USA

Osteosarcoma is a primary bone tumor that affects children and young *** estrogen metabolite 2-methoxyestradiol(2-ME)induces cell death in osteosarcoma *** determine whether 2-ME actions involve the control of protein synthesis,we studied the effect of 2-ME on eukaryotic initiation factor 4E(eIF4E)and eIF4E-binding protein 1(4E-BP1)in MG63 osteosarcoma *** results show that 2-ME treatment increases the association of eIF4E with 4E-BP1 in osteosarcoma ***,2-ME decreases the binding of eIF4E protein to 7-methyl-guanosine cap structure,indicating that 2-ME treatment results in the inhibition of translational *** findings are further supported by the inhibition of protein synthesis in 2-ME-treated osteosarcoma *** together,our studies show that 2-ME-mediated antitumor effects in osteosarcoma cells involve the regulation of protein synthesis,and translational machinery could serve as a target in the treatment of osteosarcoma.

关键词： 2-Methoxyestradiol 4E-BP Estrogen metabolite eIF4E Osteosarcoma

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Exenatide promotes regeneration of injured rat sciatic nerve

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Neural Regeneration Research 2017年第4期12卷 637-643页

作者： Ersin Kuyucu Bilal Gumus Oytun Erbas Fatih Oltulu Arslan Bora Department of orthopedics and Traumatology Faculty of Medicine Istanbul Medipol University Istanbul Turkey orthopedics clinic Antalya State Hospital Antalya Turkey Department of Physiology Ege University Faculty of Medicine Izmir Turkey Department of Histology clinic Ege University Faculty of Medicine Izmir Turkey Department of orthopedics and Traumatology Izmir Ataturk Training and Educational Research Hospital Izmir Turkey

Damage to peripheral nerves results in partial or complete dysfunction. After peripheral nerve injuries, a full functional recovery usually cannot be achieved despite the standard surgical repairs. Neurotrophic factors and growth factors stimulate axonal growth and support the viability of nerve cells. The objective of this study is to investigate the neurotrophic effect of exenatide （glucagon like peptide-1 analog） in a rat sciatic nerve neurotmesis model. We injected 10 [ag/d exenatide for 12 weeks in the experimental group （n = 12） and 0.1 mL/d saline for 12 weeks in the control group （n = 12）. We evaluated nerve regeneration by conducting electrophysiological and motor functional tests. Histological changes were evaluated at weeks 1, 3, 6, and 9. Nerve regeneration was monitored using stereomicroscopy. The electrophysiological and motor functions in rats treated with exenatide were improved at 12 weeks after surgery. Histological examination revealed a significant increase in the number of axons in injured sciatic nerve following exenatide treatment confirmed by stereomicroscopy. In an experimentally induced neurotmesis model in rats, exenatide had a positive effect on nerve regeneration evidenced by electromyography, functional motor tests, histological and stereomicroscopic findings.

关键词： nerve regeneration sciatic nerve glucagon like peptid 1 electromyography stereomicroscopy histology neural regeneration

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Prevalence and classification of equinus foot in bilateral spastic cerebral palsy

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World Journal of Pediatrics 2019年第3期15卷 276-280页

作者： Axel Horsch Marco G(o)tze Andreas Geisbüsch Nicholas Beckmann Stefanos Tsitlakidis Gregor Berrsche Matthias Klotz Heidelberg University Hospital Clinic for Orthopedics and Trauma SurgerySchlierbacher Landstr.200a69118 HeidelbergGermany

Background Equinus is a common deformity in children with bilateral spastic cerebral palsy (BSCP).While dynamic equinus usually is treated by conservative therapy,fixed contractures need surgical *** choose the appropriate surgical method,it is important to discriminate between isolated gastrocnemius shortening and combined gastrosoleus complex *** In a retrospective study 938 patients with BSCP were *** underwent gait analysis and clinical examination.248 patients (496 limbs) met the inclusion *** from motion analysis and clinical examination were used to calculate the prevalence and to further classify fixed equinus *** The prevalence of equinus was 83.3%.During clinical exam 246 (59.6%) limbs showed combined gastrosoleus complex contracture and 167 (40.4%) isolated gastrocnemius *** at stance and mean DF at initial contact were significantly reduced in combined contracture,while *** was increased (P < 0.05).Conclusions Corroborating the results of previous studies,in this study there was a high prevalence of fixed equinus in patients with *** prevalence of equinus correlated with increasing *** half of the patients with fixed equinus show a different involvement of gastrocnemius and soleus muscle,we recommend to apply Silfverski(o)ld's test to discriminate between those two types to choose the appropriate surgical therapy.

关键词： Cerebral palsy Classification Equinus foot Equinus prevalence Gait analysis

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