Bio-medical materials and engineering最新文献

{"title":"Experimental and numerical failure analysis of Thompson hip prosthesis.","authors":"Ali Motameni, Ömer Can Farukoğlu, Rıza Gürbüz, İhsan Korkut","doi":"10.1177/09592989251353462","DOIUrl":"https://doi.org/10.1177/09592989251353462","url":null,"abstract":"<p><p>BackgroundThere are different surgical procedures to fix femoral head-neck fractures, such as total hip arthroplasty and hemiarthroplasty. Under optimal conditions, the inserted prosthesis should last a long time, possibly a lifetime, with only trace amounts of wear each year due to the friction between the femur bone and the prosthesis stem. However, in some cases, failure due to excessive wear, creep, fatigue, corrosion, etc., can occur.ObjectiveThis study investigates the failure causes of a Thompson hip prosthesis both experimentally and numerically.MethodsThe stem of the prosthesis, which is inserted into the femur, broke inside a patient's body over time. Following the removal surgery, the severely damaged and fractured stem was examined to determine the root causes of the failure. For this purpose, fractographic examination of the fractured surfaces was conducted with scanning electron microscope (SEM). Microstructural analyses were performed using optical microscope, and the chemical composition of the prosthesis was analyzed with energy dispersive spectroscopy (EDS). Vickers hardness (HV30) test was conducted on the femoral stem. Additionally, finite element method (FEM) was applied to estimate the forces acting on the prosthesis.ResultsIt was observed that fatigue cracks initiated and propagated from the outer surface of the femoral stem at locations very close to the maximum von Mises stresses observed in the FEM analysis. However, the load magnitudes in the FEM analysis were not high enough to initiate any cracks.ConclusionIt is considered that crack initiation occurred due to material defects from the prosthesis manufacturing process, and the cyclic loading during body motion propagated these cracks. Ultimately, the fracture of the Thompson hip prosthesis occurred.</p>","PeriodicalId":9109,"journal":{"name":"Bio-medical materials and engineering","volume":" ","pages":"9592989251353462"},"PeriodicalIF":1.0,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144526410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detection of breast cancer using fractional discrete sinc transform based on empirical Fourier decomposition.","authors":"Mohamed Moustafa Azmy","doi":"10.1177/09592989251351608","DOIUrl":"10.1177/09592989251351608","url":null,"abstract":"<p><p>Breast cancer is the most common cause of death among women worldwide. Early detection of breast cancer is important; for saving patients' lives. Ultrasound and mammography are the most common noninvasive methods for detecting breast cancer. Computer techniques are used to help physicians diagnose cancer. In most of the previous studies, the classification parameter rates were not high enough to achieve the correct diagnosis. In this study, new approaches were applied to detect breast cancer images from three databases. The programming software used to extract features from the images was MATLAB R2022a. Novel approaches were obtained using new fractional transforms. These fractional transforms were deduced from the fraction Fourier transform and novel discrete transforms. The novel discrete transforms were derived from discrete sine and cosine transforms. The steps of the approaches were described below. First, fractional transforms were applied to the breast images. Then, the empirical Fourier decomposition (EFD) was obtained. The mean, variance, kurtosis, and skewness were subsequently calculated. Finally, RNN-BILSTM (recurrent neural network-bidirectional-long short-term memory) was used as a classification phase. The proposed approaches were compared to obtain the highest accuracy rate during the classification phase based on different fractional transforms. The highest accuracy rate was obtained when the fractional discrete sinc transform of approach 4 was applied. The area under the receiver operating characteristic curve (AUC) was 1. The accuracy, sensitivity, specificity, precision, G-mean, and F-measure rates were 100%. If traditional machine learning methods, such as support vector machines (SVMs) and artificial neural networks (ANNs), were used, the classification parameter rates would be low. Therefore, the fourth approach used RNN-BILSTM to extract the features of breast images perfectly. This approach can be programed on a computer to help physicians correctly classify breast images.</p>","PeriodicalId":9109,"journal":{"name":"Bio-medical materials and engineering","volume":" ","pages":"9592989251351608"},"PeriodicalIF":1.0,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of artificial tooth root materials on temperature distribution in peri-implantitis for photothermal therapy.","authors":"Donghyuk Kim, Hyunjung Kim, Hee-Sun Kim","doi":"10.1177/09592989251346472","DOIUrl":"https://doi.org/10.1177/09592989251346472","url":null,"abstract":"<p><p>BackgroundA representative method for compensating for tooth loss is implant placement. Dental implants consist of a crown, an abutment, and an artificial tooth root, and are made of various materials. Proper care is essential for the long-term use of implants, and negligence in care can lead to inflammation around the implant. The most representative inflammation that occurs around implants is peri-implantitis, and various laser treatments are being studied recently to eliminate it.ObjectiveIn this study, the effect of implant materials on temperature rise within inflamed tissue was analyzed both theoretically and numerically in removal of peri-implantitis using photothermal therapy.MethodsThe temperature distribution in tissue for various artificial root materials, laser irradiation angles, and intensities was calculated, and degree of tissue death was determined using the Arrhenius damage integral. Furthermore, percentage of tissue death was analyzed using the Arrhenius thermal damage ratio and the normal tissue Arrhenius thermal damage ratio to identify trends in the results based on treatment conditions.ResultsConsequently, with regard to materials used for artificial tooth roots, the prevailing trend in treatment indicates that zirconia is the most effective material, followed by Ti-6Al-4V, titanium, and tantalum. The efficacy of laser irradiation increases as the angle approaches vertical.ConclusionThe findings indicate that increasing laser power and reducing the irradiation angle are beneficial when focusing solely on inflammation.</p>","PeriodicalId":9109,"journal":{"name":"Bio-medical materials and engineering","volume":" ","pages":"9592989251346472"},"PeriodicalIF":1.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144315884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retraction: Mesenchymal Stem Cells Derived from Human Adipose Tissue Exhibit Significantly Higher Chondrogenic Differentiation Potential Compared to Those from Rats'.","authors":"","doi":"10.1177/09592989251347678","DOIUrl":"https://doi.org/10.1177/09592989251347678","url":null,"abstract":"","PeriodicalId":9109,"journal":{"name":"Bio-medical materials and engineering","volume":" ","pages":"9592989251347678"},"PeriodicalIF":1.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144282373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel fem framework for correlative study of mechanical properties of normal and osteoporotic human bone.","authors":"Sanvi Pranav Bhise, Raviraj H Havaldar","doi":"10.1177/09592989251346476","DOIUrl":"https://doi.org/10.1177/09592989251346476","url":null,"abstract":"<p><p>BackgroundOsteoporosis is a prevalent bone disease which results in increased bone porosity and decreased bone density, which in turn raises the risk of fractures. A conflict between bone formation (the process of creating new bone tissue) and bone resorption (the degradation and removal of old bone tissue) causes the disorder. This imbalance causes the process of bone remodelling to be disrupted, which weakens the bone structures.ObjectiveDue to intrinsic anatomical differences, previous research on the prediction of bone failure has been imprecise. It requires improvement for load scenarios and validation for various demographics, ultimately leading to low accuracy.MethodsTo overcome these limitations, this study proposes a novel Finite Element analysis framework for predicting osteoporosis with the mechanical properties of human bone for stress, strain estimation.ResultsAs a result of this proposed framework proves its significance with stress in healthy bones is 2.557541680090727e-04 and bones with osteoporosis is 1.814480251460656e-03, young's modulus of healthy bones and unhealthy bones are 7.019135266051970e + 10 and 0.6158529354739577e + 10, the von Mises stress for healthy bone is 2.4897e + 07, and for the unhealthy bone is 2.8638e + 07, finally, the maximum deflection in healthy bone is 1.0235e-03, for unhealthy bone is 2.1182e-03.ConclusionThus the proposed model provides significant results in the presence or absence of osteoporosis disease.</p>","PeriodicalId":9109,"journal":{"name":"Bio-medical materials and engineering","volume":" ","pages":"9592989251346476"},"PeriodicalIF":1.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144282372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Upper airways modelling and validation of mandibular advancement surgery.","authors":"Mohd Faruq Abdul Latif, Nik Nazri Nik Ghazali, M F Abdullah, Norliza Binti Ibrahim, Roziana Mohd Razi, Tmys Tuan Ya, Irfan Anjum Badruddin, Sarfaraz Kamangar, Asa Zedan, Abdul Azeem Khan","doi":"10.1177/09592989251341127","DOIUrl":"https://doi.org/10.1177/09592989251341127","url":null,"abstract":"<p><strong>Background: </strong>Most Obstructive Sleep Apnoea (OSA) treatments use cross-sectional examination of the Upper Airways (UA) to determine decreasing gap and UA length. Surgery is detrimental to all OSA patients, stressing the need for better assessment.ObjectiveThis study integrates Computational Fluid Dynamics (CFD) with physical model validation to improve OSA prediction and turbulence model accuracy and dependability.MethodsThe k-omega SST turbulence model is used to analyse OSA using CFD. SLS is used to build a physical model of the UA for CFD simulations. The UA's physical model is then compared to the OSA-recommended CFD turbulence model to verify simulation-physical reality coherence.ResultThe average UA pressure differential decreases considerably after mandibular advancement surgery. The Turbulent Kinetic Energy (TKE) increases after surgery, indicating more turbulence. Cross-validation of the physical model confirms the OSA CFD turbulence simulation's validity.ConclusionThe study concludes that matching UA simulations with physical models improves OSA assessments. CFD with established physical models is a reliable method for assessing OSA therapy, especially surgical operations. The post-surgery increase in TKE needs more study to determine its effects on OSA treatment outcomes.</p>","PeriodicalId":9109,"journal":{"name":"Bio-medical materials and engineering","volume":" ","pages":"9592989251341127"},"PeriodicalIF":1.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144282374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design strategies for titanium surfaces to adsorb and release drugs: An in vitro study.","authors":"Pablo Yael Carrazco Ávila, Juan Ignacio Rosales Leal, Miguel Ángel Rodríguez Valverde, María Encarnación Morales Hernandez","doi":"10.1177/09592989251346461","DOIUrl":"https://doi.org/10.1177/09592989251346461","url":null,"abstract":"<p><strong>Background: </strong>During the early postoperative period, it is important that the patient recovers without pain and inflammation, while preserving their quality of life. In this sense, coated titanium surfaces have been designed to release anti-inflammatory and analgesic drugs during the first postoperative hours.</p><p><strong>Objective: </strong>Evaluate the adsorption capacity and release profile of different bioactive titanium surfaces treated with three different drugs: acetaminophen, doxepin and ibuprofen.</p><p><strong>Methods: </strong>Four bioactive surfaces (polished, oxidized, hydroxyapatite precipitate, and polyvinyl alcohol coating surfaces) were physiochemically treated and analyzed.</p><p><strong>Results: </strong>Hydroxyapatite coatings were the roughest, while PVA coating was the softest. Acetaminophen was the only drug detected on all the surfaces. In contrast, higher drug doses were loaded into the PVA coatings, showing a satisfactory release profile.</p><p><strong>Conclusion: </strong>The results suggest that a rougher or ionically charged surface does not guarantee drug adsorption. In contrast, the use of a transport vehicle such as a polyvinyl coating ensures the release of the drug, initiating its therapeutic effect within the first minutes, and maintained for a period of between 120 and 180 min.</p>","PeriodicalId":9109,"journal":{"name":"Bio-medical materials and engineering","volume":" ","pages":"9592989251346461"},"PeriodicalIF":1.0,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144257321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"BMP-2 enhanced new bone formation of calcium phosphate-based composites in mice.","authors":"Liuxing He, Xue Wang, Nana Xiong, Zhihong Dong, Lijia Cheng","doi":"10.1177/09592989251346468","DOIUrl":"https://doi.org/10.1177/09592989251346468","url":null,"abstract":"<p><strong>Background: </strong>Autologous bone grafting, particularly using iliac crest bone grafts, historically been considered the gold standard for bone grafting. However, its limited availability and secondary surgical trauma associated with the procedure have restricted its widespread application.</p><p><strong>Objective: </strong>To investigate the osteogenic potential of calcium phosphate-based composites with or without the addition of bone morphogenetic protein-2 (BMP-2).</p><p><strong>Methods: </strong>The BMP-2/calcium phosphate (CaP)/temperature-sensitive hydrogel (BCT) composite was synthesized, while the CaP/temperature-sensitive hydrogel (CT) composite was prepared as control group. The surface morphology of the composites was observed using scanning electron microscope (SEM). Subsequently, the composites were co-cultured with mouse bone marrow mesenchymal stem cells (BMSCs), and the cell proliferation, alkaline phosphatase (ALP) activity and extracellular matrix (ECM) mineralization were assessed. The composites were injected into the muscle of mice, and the samples underwent hematoxylin and eosin (HE), Masson-trichrome, and safranin and fast green staining. Immunohistochemistry for BMP-2 and type I collagen (ColI) was performed at weeks 8 and 12.</p><p><strong>Results: </strong>There was no significant difference in cell proliferation between the BCT and CT groups. However, the relative ALP activity and ECM mineralization were significantly higher in BCT group compared to the CT group (<i>P</i> < 0.05). BMP-2 accelerated the osteoinduction process and promoted the formation of more new bone tissue and bone marrow in group BCT. The number of osteocytes and the collagen area ratio were significantly higher in group BCT than that in group CT (<i>P</i> < 0.05).</p><p><strong>Conclusion: </strong>BMP-2 and CaP synergistically accelerated the initiation of osteoinduction, and promoted increased bone formation. The temperature-sensitive hydrogel made the material injectable, expanding its range of applications. The BCT composite shows promise as an artificial bone material.</p>","PeriodicalId":9109,"journal":{"name":"Bio-medical materials and engineering","volume":" ","pages":"9592989251346468"},"PeriodicalIF":1.0,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrically stimulated drug release using conductive GelMA/k-carrageenan/rGO blended hydrogel for enhanced biomedical applications.","authors":"Jong Min Lee","doi":"10.1177/09592989251343077","DOIUrl":"https://doi.org/10.1177/09592989251343077","url":null,"abstract":"<p><p>BackgroundHydrogels are hydrophilic polymers with high water content and a porous structure, making them suitable for incorporating water-soluble drugs and functioning as drug delivery systems. Their structural similarity to living tissues renders them valuable for applications in tissue engineering, pharmaceuticals, and medical treatments.ObjectiveThis study aimed to develop a blended hydrogel with improved mechanical strength and biocompatibility, and to enhance its drug release capabilities through electrical stimulation.MethodA conductive hydrogel was synthesized by blending gelatin methacrylate (GelMA), kappa carrageenan (k-carrageenan), and reduced graphene oxide (rGO). The hydrogel's physical integrity, biocompatibility, and drug release performance under electrical stimulation were evaluated.ResultsThe GelMA/k-carrageenan/rGO hydrogel retained its structural stability, demonstrated excellent biocompatibility, and effectively released drugs in response to electrical stimulation.ConclusionThe developed conductive hydrogel presents strong potential for advanced drug delivery systems utilizing electrical stimulation, with promising implications across biomedical and pharmaceutical fields.</p>","PeriodicalId":9109,"journal":{"name":"Bio-medical materials and engineering","volume":" ","pages":"9592989251343077"},"PeriodicalIF":1.0,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144075984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of electrospun membranes of polylactic acid and polypyrrole as a biosensor for the detection of cholesterol.","authors":"Claudia G Ramírez-Mendoza, Lorena Armenta-Villegas, Jesús M Quiroz-Castillo, Angel U Orozco-Valencia, Dora E Rodríguez-Félix, Rafael Ramírez-Bon, David A Fernández-Benavides, José R Flores-León, Guillermo Suarez-Campos, Ana D Cabrera-González, Damian F Plascencia-Martínez, María M Castillo-Ortega","doi":"10.1177/09592989251341131","DOIUrl":"https://doi.org/10.1177/09592989251341131","url":null,"abstract":"<p><strong>Background: </strong>Hydrogen peroxide (H₂O₂) plays a crucial role in various industries and enzymatic reactions, including cholesterol oxidation. Cholesterol, vital for physiological functions, can lead to cardiovascular and hepatic diseases when present in excess. Accurate detection is crucial, yet current techniques are costly and time-consuming. Biosensors offer a promising alternative due to their sensitivity, speed, and portability in detecting H₂O₂. <b>Objective:</b> This study aims to develop a sensitive, simple, rapid, and cost-effective biosensor for H₂O₂ detection using electrospun membranes coated with polypyrrole (PPy). <b>Methods:</b> Poly(lactic acid) (PLA) membranes were prepared using the electrospinning technique. Subsequently, these membranes were coated with polypyrrole (PPy) through in situ chemical polymerization. The obtained materials were characterized using SEM, contact angle measurements, XPS, and their electrical properties were analyzed. <b>Results</b>: PLA/PPy composite membranes exhibited electrical conductivities on the order of 10^-2 S cm^-1. Upon exposure to H₂O₂ and enzymatic reaction, a significant decrease in their electrical properties was observed, indicating their potential as sensors for detecting this analyte. <b>Conclusions:</b> Electrospun PLA/PPy membranes demonstrate high potential for H₂O₂ detection, owing to their large surface area and high reactivity, thereby enhancing sensor sensitivity. These characteristics make this material a promising option for H₂O₂ detection applications across various industries.</p>","PeriodicalId":9109,"journal":{"name":"Bio-medical materials and engineering","volume":" ","pages":"9592989251341131"},"PeriodicalIF":1.0,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144075981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}