Palladium-Catalyzed C-H Olefination of Imidazo[1,2a] pyridine Carboxamide in Aqueous Ethanol under Oxygen.

The advancement of sustainable chemistry and changes in the economy are strongly intertwined. Reaction time, cost savings, moderate temperatures, and generation of the fewest byproducts are frequently achieved by using catalytic processes. Herein, we report the C-H olefination of imidazo[1,2a] pyridine carboxamides with various acrylates in the presence of Pd (OAc)2 with O2 as the oxidant in aqueous ethanol rather than using non-ecofriendly solvents. The C-H activation features most user-friendly reaction conditions, excellent yield as well as plenty substrate scope and applicable for C-H deuteriation of the corresponding heteroarenes with D2O. Experimental mechanistic studies indicate that C-H activation step succeeded after formation of tetra coordinated square planer Pd-substrate adduct.

Predicting the Electrophoretic Mobility of Charged Particles in an Aqueous Medium.

Electrophoresis of charged particles has important applications in biochemical separation processes. The mobility of these particles depends on the surrounding electric double layer (EDL), which is impacted by solvent restructuring because of hydration interactions. Nevertheless, most theoretical estimates ignore such interactions during computation of the electrophoretic mobility. Here, we employ a complementary blend of mean-field analysis and molecular dynamics simulations performed for a peptide-G-quadruplex complex to assess how hydration interactions alter the mobility of a charged particle in an aqueous medium. These interactions are seen to stabilize the EDL, resulting in more significant localized counterion concentrations while strengthening the ensuing electrokinetic flow. The ordering of ions near the particle surface is obtained only upon including hydration interaction, revealing that the hydration water molecules act as a glue for forming a stable EDL, a key finding of this work. Conversely, the observed microstructure of ions near the charged surface as obtained from our theory establishes a bridge link between the micro and continuum model. The presence of larger counter ions enhances the drag on the particle, thus restricting its mobility. The mobility also becomes dependent on size, which may be useful for isolating a wide array of biomolecules. The impact of hydration interactions intensifies with increases in particle size, surface charge density, and bulk ion concentration.

Comparison of endoscopic decompression to open laminectomy in patients with thoracic ossified ligamentum flavum - a systematic review and meta-analysis.

In recent years, there has been growing interest in an alternative approach for treating TOLF, such as endoscopic decompression, which minimizes the disruption of surrounding tissues. It is important to understand the advantages, disadvantages, and potential differences in outcomes associated with each approach. This comparative study aims to evaluate and contrast the effectiveness, safety, and outcomes of these two surgical techniques, open laminectomy and endoscopic decompression, in the management of thoracic OLF. The literature review was conducted on Embase, PubMed, Scopus and Google Scholar databases. After a thorough screening of all search results, 14 studies were shortlisted, from which data was extracted, and statistical analysis was done. Pooled analysis was done to ascertain the intra-operative and post-operative outcomes after surgery for TOLF. Overall, 351 patients were included in the study for evaluation. 174 patients were operated on by open laminectomy, and 177 patients were seen in the endoscopy group. Decreased operative time was seen in the endoscopic subgroup. The mean length of hospital stay of 6.6 days. Both groups showed improvement in mJOA and VAS score. The recovery rate for the reported study cohort was 66.8%, with the Endoscopic surgical approach showing a positive correlation with the mean recovery rate. The dural tear was the most common complication, with a rate of 6.6%. The mean estimated infection rate was 2.7% and postoperative CSF leak was 3.7%, with a trend of significantly higher rates in the open subgroup. Both of the groups showed improvement in functional scores, VAS scores, and cross-sectional area. However, the Endoscopic decompression group experienced reduced hospital stays, operating times, and intraoperative blood loss. The most frequent side effects were CSF leak and dural tear. A few cases showed revision and infection. None of the problems differed between the groups.

Surgical techniques and perioperative surgical outcomes after discectomy for calcified lumbar disc herniation: a review and meta-analysis.

INTRODUCTION: Calcified lumbar disc herniation (CLDH) poses surgical challenges due to longstanding disease and adherence of herniated disc to the surrounding neural structures. The data regarding outcomes after surgery for CLDH are limited. This review was conducted to analyse the surgical techniques, perioperative findings and the postoperative clinical outcomes after surgery for CLDH. METHODS: PRISMA guidelines were followed whilst conducting this systematic review and meta-analysis. The literature review was conducted on 3 databases (PubMed, EMBASE, and CINAHL). After thorough screening of all search results, 9 studies were shortlisted from which data were extracted and statistical analysis was done. Pooled analysis was done to ascertain the perioperative and postoperative outcomes after surgery for CLDH. Additional comparative analysis was done compared to CLDH with non-calcified lumbar disc herniation (NCLDH) cases. RESULTS: We included 9 studies published between 2016 and 2022 in our review, 8 of these were retrospective. A total of 356 cases of CLDH were evaluated in these studies with a male preponderance (56.4%). Mean operative time was significantly lower in NCLDH cases compared to CLDH cases. The mean estimated blood loss showed a negative correlation with the percentage of males. Satisfactory clinical outcomes were observed in majority of patients. The risk of bias of the included studies was moderate to high. CONCLUSION: Surgical difficulties in CLDH cases leads to increase in operative time compared to NCLDH. Good clinical outcomes can be obtained with careful planning; the focus of surgery should be on decompression of the neural structures rather than disc removal.

Virtual reality is effective in the management of chronic low back ache in adults: a systematic review and meta-analysis of randomized controlled trials.

BACKGROUND: Chronic low back ache (CLBA) is a common condition that is conventionally managed with physical therapy and analgesics. Recently, virtual reality-based interventions have been tried out in the management of CLBA. Their effectiveness, however has not been established. This meta-analysis aims to find out if the application of VR will lead to better pain relief, as compared to conventional techniques in adults with CLBA. METHODS: The literature search was carried out in three online databases for potential randomized controlled trials that compared VR-based interventions with conventional treatment in CLBA. Data on outcome parameters were recorded. Meta-analysis was carried out with the help of appropriate software. RESULTS: Seven studies having data on 507 subjects were included in the meta-analysis. Their mean ages were 48.4 years. There were 252 subjects in the VR group and 255 in the control group. VR-based interventions were found to have a statistically significant improvement in the pain intensity compared with conventional techniques (p - 0.005). CONCLUSION: VR-based interventions are effective in the management of CLBA in the short term. Further research with longer follow-up is required to evaluate if these improvements are persistent in the long term.

Management of mild degenerative cervical myelopathy and asymptomatic spinal cord compression: an international survey.

STUDY DESIGN: Cross-sectional survey. OBJECTIVE: Currently there is limited evidence and guidance on the management of mild degenerative cervical myelopathy (DCM) and asymptomatic spinal cord compression (ASCC). Anecdotal evidence suggest variance in clinical practice. The objectives of this study were to assess current practice and to quantify the variability in clinical practice. METHODS: Spinal surgeons and some additional health professionals completed a web-based survey distributed by email to members of AO Spine and the Cervical Spine Research Society (CSRS) North American Society. Questions captured experience with DCM, frequency of DCM patient encounters, and standard of practice in the assessment of DCM. Further questions assessed the definition and management of mild DCM, and the management of ASCC. RESULTS: A total of 699 respondents, mostly surgeons, completed the survey. Every world region was represented in the responses. Half (50.1%, n = 359) had greater than 10 years of professional experience with DCM. For mild DCM, standardised follow-up for non-operative patients was reported by 488 respondents (69.5%). Follow-up included a heterogeneous mix of investigations, most often at 6-month intervals (32.9%, n = 158). There was some inconsistency regarding which clinical features would cause a surgeon to counsel a patient towards surgery. Practice for ASCC aligned closely with mild DCM. Finally, there were some contradictory definitions of mild DCM provided in the form of free text. CONCLUSIONS: Professionals typically offer outpatient follow up for patients with mild DCM and/or asymptomatic ASCC. However, what this constitutes varies widely. Further research is needed to define best practice and support patient care.

A systematic review of pelvic infective osteomyelitis in children: current state of evidence.

Musculoskeletal infection of pelvis can be confused with septic arthritis of the hip, irritable hip, sacroiliitis, and spondylodiscitis in the initial period. This study aimed to present the complete clinical picture of pelvic infective osteomyelitis (PIO) in children along with its natural course. Two researchers independently used PubMed and Scopus electronic databases for the literature review. This review includes all studies reporting PIO in the pediatric age group. The final inclusion of 11 eligible studies was done. A total of 277 patients were analyzed from the included studies with the majority of males (158/242, 65.2%). Hip and groin pain (147/195, 75.3%) and limp (155/249, 62.2%) were the common presenting symptoms. Increased systemic temperature (83/103, 80.5%) and localized tenderness at the hip joint area (90/121, 74.3%) were among the commonest signs. Magnetic resonance imaging was an investigation of choice for diagnosis (89/93, 95.6%). Blood culture showed growth in 47.6% (119/250) patients with Staphylococcus aureus (83/102, 81.3%) being the most common isolated organism. Treatment with sensitive antibiotics was the mainstay of management with surgery for debridement or biopsy being required in only 16.1% (23/142) of the patients. PIO in children is a rare condition mimicking several other disease processes affecting the neighboring tissues the diagnosis of which gets limited in low-resource settings. Further prospective clinical studies are the need of the hour to validate the guideline proposed. Explorative studies to define a clinical scoring system to differentiate septic arthritis of the hip from PIO may be considered.

Exploring the natural efficacy of spirulina powder for combating obesity, diabetes, and inflammation.

BACKGROUND: An increasing incidence of metabolic disorders emphasizes the need to explore natural treatments. Spirulina, a microalga with a rich nutrient profile, offers a promising solution for obesity, diabetes, and inflammation. This study provides a meticulous analysis of spirulina powder, evaluating its physicochemical attributes and technofunctional properties through the use of advanced analytical techniques. RESULTS: Spirulina powder demonstrated strong flowability, substantial water and oil absorption capacity, and moderate foaming characteristics. The ethanolic extract of spirulina was found to be a repository of phenolic (6.93 mg GAE/g) and flavonoid (7.17 mg QE/g) compounds, manifesting considerable antioxidant activity with a 58.49 g kg-1 inhibition of 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals. The extract also exhibited pronounced inhibitory effects on lipase and amylase enzymes, with inhibition percentages of 72.05 g kg-1 and 70.28 g kg-1, respectively, and displayed a glucose retention capacity of 1.28 mg dL-1 (68.52 g kg-1) in a dialysis membrane assay. These results suggest its efficacy in modulating obesity and glycemic control. The powder also showed a potent anti-inflammatory response by mitigating protein denaturation. CONCLUSION: Spirulina powder is a potent natural agent with multiple health benefits, meriting its incorporation into functional foods. It could be suitable for application in the food industry, offering a natural strategy to combat metabolic diseases. This research adds to the scientific literature on spirulina, paving the way for future research into its utilization. © 2024 The Author(s). Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

Ferulic acid: extraction, estimation, bioactivity and applications for human health and food.

Ferulic acid ((E)-3-(4-hydroxy-3-methoxy-phenyl) prop-2-enoic acid) is a derivative of caffeic acid found in most plants. This abundant phenolic compound exhibits significant antioxidant capacity and a broad spectrum of therapeutic effects, including anti-inflammatory, antimicrobial, anticancer, antidiabetic, cardiovascular and neuroprotective activities. It is absorbed more quickly by the body and stays in the bloodstream for a longer period compared with other phenolic acids. It is widely used in the food (namely whole grains, fruits, vegetables and coffee), pharmaceutical and cosmetics industries. The current review highlights ferulic acid and its pharmacological activities, reported mechanisms of action, food applications (food preservative, food additive, food processing, food supplements and in food packaging in the form of edible films) and role in human health. In the future, the demand for ferulic acid in the food and pharmaceutical industries will increase. © 2024 The Author(s). Journal of the Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

Biomarkers of Hepatic Toxicity: An Overview.

Background: Hepatotoxicity is the foremost issue for clinicians and the primary reason for pharmaceutical product recalls. A biomarker is a measurable and quantifiable attribute used to evaluate the efficacy of a treatment or to diagnose a disease. There are various biomarkers which are used for the detection of liver disease and the intent of liver damage. Objective: This review aims to investigate the current state of hepatotoxicity biomarkers and their utility in clinical settings. Using hepatic biomarkers, the presence of liver injury, its severity, prognosis, causative agent, and type of hepatotoxicity can all be determined. Methods: Relevant published articles up to 2022 were systematically retrieved from MEDLINE/PubMed, SCOPUS, EMBASE, and WOS databases using keywords such as drug toxicity, hepatotoxicity biomarkers, biochemical parameters, and nonalcoholic fatty liver disease. Results: In clinical trials and everyday practice, biomarkers of drug-induced liver injury are essential for spotting the most severe cases of hepatotoxicity. Hence, developing novel biomarker approaches to enhance hepatotoxicity diagnosis will increase specificity and/or identify the person at risk. Importantly, early clinical studies on patients with liver illness have proved that some biomarkers such as aminotransferase, bilirubin, albumin, and bile acids are even therapeutically beneficial. Conclusions: By assessing the unique signs of liver injury, health care professionals can rapidly and accurately detect liver damage and evaluate its severity. These measures contribute to ensuring prompt and effective medical intervention, hence reducing the risk of long-term liver damage and other major health concerns.

Posterior-only fixation in pelvic fractures: Is it sufficient in lateral compression injuries?

PURPOSE: Lateral compression (LC) injuries account for more than two-thirds of all pelvic fractures. The goal of surgical treatment is to provide adequate stability and early mobilization. The consensus on posterior fixation of such injuries is strong in the literature; however, the necessity of anterior ring fixation is not clear. Therefore, this study was formulated to determine the practicability of posterior-only fixation in LC injuries. METHODS: Between March 2015 and May 2020, all patients with LC type pelvic ring fractures who were admitted and operated upon in a single level 1 trauma center were included in this cross-sectional observational study. Demographic data, co-morbidities, treatment, types of surgical fixation, concomitant injuries and surgeries, surgical complications, length of hospital stay, injury to weight bearing duration, and follow-up period were documented. Functional outcome and quality of life were assessed using Majeed score and SF-36 questionnaire. Non-normally distributed data were presented as median (Q1, Q3) and normally distributed data were presented as mean ± SD. Spearman's rank correlation coefficient was used for correlation analysis. RESULTS: A total of 25 patients were included, with a mean age of 29.8 years. All patients were managed operatively with posterior-only fixation. The median Majeed score was 90 (76, 95). The median physical component summary score was 69.37 (38.75, 85.62). The median mental component summary score was 63.95 (39.25, 87.87). There was no significant difference compared to population norms of both physical component summary and mental component summary. Injury to weight bearing time correlated significantly (p = 0.002) with Majeed score as well as SF-36 score (p = 0.044). No other variable had a significant association with outcomes. CONCLUSION: Posterior-only fixation is sufficient for fixing LC injuries with up to 80% of cases having good to excellent functional outcomes. However, comparative studies with larger sample sizes are needed for further validation.

The Role of Mitophagy in Various Neurological Diseases as a Therapeutic Approach.

Mitochondria are critical to multiple cellular processes, from the production of adenosine triphosphate (ATP), maintenance of calcium homeostasis, synthesis of key metabolites, and production of reactive oxygen species (ROS) to maintain necrosis, apoptosis, and autophagy. Therefore, proper clearance and regulation are essential to maintain various physiological processes carried out by the cellular mechanism, including mitophagy and autophagy, by breaking down the damaged intracellular connections under the influence of various genes and proteins and protecting against various neurodegenerative diseases such as Parkinson disease (PD), amyotrophic lateral sclerosis (ALS), Alzheimer disease (AD), and Huntington disease (HD). In this review, we will discuss the role of autophagy, selective macroautophagy, or mitophagy, and its role in neurodegenerative diseases along with normal physiology. In addition, this review will provide a better understanding of the pathways involved in neuron autophagy and mitophagy and how mutations affect these pathways in the various genes involved in neurodegenerative diseases. Various new findings indicate that the pathways that remove dysfunctional mitochondria are impaired in these diseases, leading to the deposition of damaged mitochondria. Apart from that, we have also discussed the therapeutic strategies targeting autophagy and mitophagy in neurodegenerative diseases. The mitophagy cycle results in the degradation of damaged mitochondria and the biogenesis of new healthy mitochondria, also highlighting different stages at which a particular neurodegenerative disease could occur.

Observing Real-Time Adhesion of Microparticles on Glass Surfaces.

Fouling on glass surfaces reduces the solar panel efficiency and increases water consumption for cleaning. Superhydrophobic coatings on glass enable self-cleaning by allowing water droplets to carry away dirt particles. Observing the interaction between charged particles and surfaces provides insights into effective cleaning. Using a high-speed camera and a long-distance objective, we analyzed the in situ deposition of variously functionalized and charged silica dust microparticles on chemically treated glass. The ambient charges for the control, hydrophobic, and positively charged particles were approximately -0.5, -0.13, and +0.5 nC, respectively. We found that a positively charged particle of 2.3 ± 1.2 µm diameter adhered to hydroxylated glass in ∼0.054 s, compared to 0.40 and 0.45 s for quaternary ammonium- and fluorosilane-functionalized hydrophobic glass. Experiments suggest that quaternary ammonium-functionalized glass surfaces are about 77.8% more resistant to soiling than bare surfaces.

Effect of long-term medium to high-dose inhaled budesonide on bone mineral density in children with asthma: a cross-sectional study.

OBJECTIVE: The objective of this study was to examine the impact of long-term medium to high-dose inhaled budesonide on bone mineral density in children with asthma. METHODS: We conducted a cross-sectional study in children aged 7-17 years with asthma, who received long-term (≥2 years), medium to high-dose inhaled budesonide (≥400µg/day in 6-11 years old; ≥800 µg/day in >11 years old). We measured bone mineral density (BMD) using dual-energy X-ray absorptiometry and compared it with reference Indian normative values. RESULTS: Thirty-five children with moderate to severe asthma receiving long-term medium to high-dose inhaled budesonide, were included in the study. We found a significantly low lumbar-spine BMD in the study population compared to reference Indian values (p-value 0.002). Eight cases had short stature. Despite the adjustment for height-age in these short-stature cases, lumbar-spine BMD remained significantly low in the study population (p-value 0.020). No significant difference was found in 25-hydroxy vitamin D levels between subjects with "low BMD" and "BMD z-score > -2". CONCLUSIONS: The findings of this study suggest that long-term medium to high-dose inhaled budesonide treatment in children with asthma is associated with decreased BMD. However, further investigation with a larger sample size is necessary to confirm this relationship.

Does robotic-assisted surgery improve outcomes of total hip arthroplasty compared to manual technique? A systematic review and meta-analysis.

BACKGROUND: Robot-assisted total hip arthroplasty (THA) is an emerging technology that claims to position implants with very high accuracy. However, there is currently limited data in literature on whether this improved accuracy leads to better long-term clinical outcomes. This systematic review compares the outcomes of THA done with the help of robotic assistance (RA) to those done with conventional manual techniques (MTs). METHODS: Four electronic databases were searched for eligible articles that directly compared robot-assisted THA to manual THA and had data on the radiological or clinical outcomes of both. Data on various outcome parameters were collected. Meta-analysis was conducted using a random-effects model with 95% CIs. RESULTS: A total of 17 articles were found eligible for inclusion, and 3600 cases were analysed. Mean operating time in the RA group was significantly longer than in the MT group. RA resulted in significantly more acetabular cups being placed inside Lewinnek's and Callanan's safe zones (p<0.001) and had significantly reduced limb length discrepancy compared with MT. There were no statistically significant differences in the two groups in terms of incidence of perioperative complications, need for revision surgery and long-term functional outcome. CONCLUSION: RA leads to highly accurate implant placement and leads to significantly reduced limb length discrepancies. However, the authors do not recommend robot-assisted techniques for routine THAs due to lack of adequate long-term follow-up data, prolonged surgical times and no significant differences in the rate of complications and implant survivorship compared with conventional MTs.

Crosstalk between phytochemicals and inflammatory signaling pathways.

Novel bioactive constituents from natural sources are actively being investigated. The phytochemicals in these phenolic compounds are believed to have a variety of beneficial effects on human health. Several phenolic compounds have been found in plants. The antioxidant potential of phenols has been discussed in numerous studies along with their anti-inflammatory effects on pro-inflammatory cytokine, inducible cyclooxygenase-2, and nitric oxide synthase. Through current study, an attempt is made to outline and highlight a wide variety of inflammation-associated signaling pathways that have been modified by several natural compounds. These signaling pathways include nuclear factor-kappa B (NF-кB), activator protein (AP)-1, protein tyrosine kinases (PTKs), mitogen-activated protein kinases (MAPKs), nuclear factor erythroid 2-related factor 2 (Nrf2) transcription factors, tyrosine phosphatidylinositol 3-kinase (PI3K)/AKT, and the ubiquitin-proteasome system. In light of the influence of natural substances on signaling pathways, their impact on the production of inflammatory mediator is highlighted in this review.

Effect of obesity on results of endoscopic versus open lumbar discectomy: a systematic review and meta-analysis.

INTRODUCTION: Lumbar disc herniation in obese individuals poses unique surgical challenges which can influence outcomes in such patients. Limited studies are available evaluating the results of discectomy in obese persons. The aim of this review was to compare outcomes in obese and non-obese individuals; and to analyse whether approach to surgery had a bearing on these outcomes. METHODS: The literature search was conducted on four databases (PubMed, Medline, EMBASE, and CINAHL) and PRISMA guidelines were followed. After screening by the authors, eight studies were shortlisted from which data were extracted and analysed. Comparative analysis was done for lumbar discectomy (microdiscectomy or minimally invasive vs. endoscopic technique) between obese and non-obese groups from the six comparative studies in our review. Pooled estimates and subgroup analysis was done to ascertain the effect of surgical approach on outcomes. RESULTS: Eight studies published between 2007 and 2021 were included. Mean age of study cohort was 39.05 years. Mean operative time was significantly shorter in the non-obese group mean difference of 15.1 min (95% CI - 0.24 to 30.5). On subgroup analysis, obese individuals operated via endoscopic approach had significantly decreased operative time as compared to open approach. Blood loss and complication rates were also lower in the non-obese groups, but not statistically significant. CONCLUSION: Significantly less mean operative time was seen in non-obese individuals and when obese patients were operated via endoscopic approach. This difference between obese and non-obese groups was significantly more in the open subgroup as compared to the endoscopic subgroup. No significant differences in blood loss, mean improvement in VAS score, recurrence rate, complication rate and length of hospital stay was found between obese and non-obese patients as well as between endoscopic versus open lumbar discectomy within the obese subgroup. The learning curve associated with endoscopy makes it a challenging procedure.

The use of the femoral neck system (FNS) leads to better outcomes in the surgical management of femoral neck fractures in adults compared to fixation with cannulated screws: A systematic review and meta-analysis.

BACKGROUND: Intracapsular femoral neck fractures are challenging to treat, with outcomes depending on the quality of reduction, and the stability of fixation. Cannulated cancellous screws (CCS) are the most commonly used implants to fix these fractures, but failure rates are significant. The recently introduced femoral neck system (FNS) may be a better option than CCS fixation and this review attempts to compare the results. METHODS: Four electronic databases were searched for eligible articles that had comparative data on the outcomes of fixation of adult femoral neck fractures with FNS and CCS. Data on various outcome parameters were collected. Meta-analysis was conducted using a random-effects model with 95% confidence intervals. RESULTS: Eight studies with 509 cases having a mean age of 50.8 years were included for final analysis. FNS was found to be associated with significantly reduced complication rates (p < 0.001), decreased incidence of postoperative femoral neck shortening (p < 0.001), quicker time to fracture union (p = 0.002), and better functional outcome scores (p < 0.001) compared to cannulated screws. FNS was also associated with a shorter operating time (mean difference 6.65 min) although not statistically significant (p = 0.24). CCS group had significantly reduced mean blood loss (p < 0.001). CONCLUSION: The available literature supports FNS as a better option for adult femoral neck fractures, with a lower complication rate, quicker union, and better clinical outcomes. LEVEL OF EVIDENCE: Level 3.

Complications and mid to long term outcomes for hip resurfacing versus total hip replacement: a systematic review and meta-analysis.

INTRODUCTION: The long-term results of total hip replacement (THR) are excellent; however, it has higher failure rates in young and active patients. Hip resurfacing arthroplasty (HRA) is an alternative in such patients and gaining popularity. This review was done to compare complications and outcomes between HRA and THA by assessing the latest level 1 studies comparing the two from the past 10 years. METHOD: A systematic review and meta-analysis was conducted using three databases (PubMed, EMBASE and SCOPUS) to compare the complications between THR and HRA in medium to long term follow up. The primary outcome of interest included the complication and revision rate between the two techniques. Functional outcomes and ionic levels at follow up were also compared as secondary outcomes. Risk of bias assessment was done using the Cochrane risk of bias tool. RESULT: The present review included 6 level 1 studies. These included 308 THR and 304 HRA. On meta-analysis, overall complications rates were significantly lower in HRA compared to the THA group with an Odds ratio (OR) of 2.17 (95% CI 1.21, 3.88; p = 0.009). No difference was seen between the two groups in terms of revision rate (OR 1.06 95% CI 0.57, 1.99; p = 0.85). Functional outcomes in both the groups were satisfactory but the Harris Hip Score was found to be significantly better in the resurfacing group (MD 2.99 95% CI - 4.01, - 1.96, p < 0.00001). There were increased cobalt and chromium ions in the resurfacing group but no detrimental effect was seen in terms of reported poisoning. CONCLUSION: Despite similar function and revision rates, HRA was seen to have lesser associated complications and ionic levels may not be a detrimental issue. Hip resurfacing provides relative ease during revisions, especially in younger patients and it may be an alternative to THR in the younger population.

Large-Area Periodic Arrays of Atomically Flat Single-Crystal Gold Nanotriangles Formed Directly on Substrate Surfaces.

The advancement of nanoenabled wafer-based devices requires the establishment of core competencies related to the deterministic positioning of nanometric building blocks over large areas. Within this realm, plasmonic single-crystal gold nanotriangles represent one of the most attractive nanoscale components but where the formation of addressable arrays at scale has heretofore proven impracticable. Herein, a benchtop process is presented for the formation of large-area periodic arrays of gold nanotriangles. The devised growth pathway sees the formation of an array of defect-laden seeds using lithographic and vapor-phase assembly processes followed by their placement in a growth solution promoting planar growth and threefold symmetric side-faceting. The nanotriangles formed in this high-yield synthesis distinguish themselves in that they are epitaxially aligned with the underlying substrate, grown to thicknesses that are not readily obtainable in colloidal syntheses, and present atomically flat pristine surfaces exhibiting gold atoms with a close-packed structure. As such, they express crisp and unambiguous plasmonic modes and form photoactive surfaces with highly tunable and readily modeled plasmon resonances. The devised methods, hence, advance the integration of single-crystal gold nanotriangles into device platforms and provide an overall fabrication strategy that is adaptable to other nanomaterials.