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Ion-Confinement-Assisted Erasure Purifies Oxidized MXene for Reuse.

Titanium carbide (Ti3C2Tx) MXene has attracted broad interest owing to its versatile functional properties. However, its intrinsic instability in aqueous environments drives spontaneous surface oxidation to insulating TiO2, resulting in pronounced performance degradation and posing a major obstacle to practical utilization. Here, we propose an erasure-purification strategy that selectively targets surface-derived oxide phases on oxidized MXene. By constructing an ion-confined interfacial environment followed by a brief acid-washing step, further oxidation is mitigated while pre-existing TiO2 i…

Hidden Functional Nanoparticles in Semiconductor Crystals.

Controlling the internal placement of functional metals within single-crystalline semiconductors remains a formidable challenge, because lattice mismatch and thermodynamic limitations generally preclude additive incorporation. Here, we show a general strategy to embed polymer-stabilized Au nanoparticles within single-crystalline anatase titanium dioxide (TiO2) while preserving its long-range lattice order. Interfacial polymer engineering overcomes intrinsic metal-oxide incompatibility, directing Au nanoparticles into the crystal interior with spatial precision. The resulting Au-TiO2 nanocompos…

Lactic acid photosynthesis via C-C cross-coupling over atomically dispersed Ba.

Photocatalytic carbon-carbon coupling offers a route for converting plastic-derived chemicals into valuable multi-carbon products, yet uncontrolled coupling of intermediate limits efficiency and selectivity. Here, we report atomically dispersed barium species on titanium dioxide that act as frustrated Lewis pairs, enabling efficient and selective generation intermediates during the co-oxidation of ethylene glycol and methanol toward lactic acid. The barium species create interstitial states near the Fermi level, enhancing charge separation and surface redox activity. Meanwhile, barium sites pr…

Metal hypersensitivity in spinal surgery: mechanisms, diagnosis, and management - a narrative review.

Metal hypersensitivity in spinal surgery is an immune-mediated reaction to metal ions released from implants like pedicle screws and rods, p … trategies focus on preoperative risk assessment, selection of hypoallergenic materials like PEEK or titanium, and revision surgery when hypersensitivity is confirmed. Multidisciplinary collaboration involving spine surgeons, allergists, and dermatologists is crucial for accurate diagnosis, effective treatment, and improved patient outcomes, emphasizing the …

Operative management of unstable sternal fracture in polytrauma: a case report and literature review.

Sternal fractures are uncommon but clinically relevant injuries, most often resulting from blunt thoracic trauma in motor vehicle collisions … islocation. Surgical management included open reduction and internal fixation of the sternum with 2 titanium plates, haematoma evacuation, and orthopaedic intervention. The postoperative course was initially uneventful; however, the patient was readmitted 1 month later with a surgical site infection caused by Proteus mirabilis.

Engineering bio-selectivity: Novel denture coatings for targeted inhibition of denture-associated pathogens.

The increasing prevalence of denture use, particularly among the elderly population, necessitates effective strategies against Candida-conta … nd colony-forming unit (CFU) counting. Results demonstrated that poly(ethylene glycol) diacrylate / titanium dioxide (PEGDA/TiO2) and Sealant/TiO2 formulations exhibited significant, selective antimicrobial activity. This efficacy is attributed to altered surface hydrophilicity and the specific mechanisms of incorporated agents. These findings underscore t …

Single-Stage Rigid Midfacial Reconstruction Using Split Calvarial Bone after Anterior Skull Base Surgery: A Case Report.

Reports of frontal and nasal bone-involving composite midfacial bone defect reconstruction after anterior skull base tumor resection remain scarce. Here, we present the case of a 75-year-old man with recurrent ethmoid sinus carcinoma who underwent combined transcranial and endonasal endoscopic resection. The resulting defects included the anterior skull base and frontal and nasal bones. A pericranial flap was used for skull base closure, achieving rigid midfacial reconstruction in a single stage using the split outer and inner cranial bone tables harvested during craniotomy. Titanium plates we…

Managing Complex Malocclusion Following Childhood Odontoma: An Interdisciplinary Approach.

Loss of the maxillary anterior teeth in childhood following an odontoma can set the stage for a complex malocclusion with enduring effects on facial esthetics, function, and psychosocial health. We report the management of a 15-year-old boy who presented 8 years after odontoma excision with an anterior maxillary defect, rightward dental midline deviation, crowding, and a crossbite. Treatment combined passive self-ligating brackets with customised torque, nickel-titanium open-coil springs for controlled space regaining, and an infrazygomatic crest temporary anchorage device to drive asymmetric …

Graphene Oxide-Silver-Coated Sulfonated Polyetheretherketone (Ag/GO-SPEEK): A Broad-Spectrum Antibacterial Artificial Bone Implants.

Polyetheretherketone (PEEK), particularly its sulfonated form (SPEEK), has emerged as a promising synthetic biomaterial for artificial bone implants, providing an alternative to conventional titanium metal. However, postoperative infections pose a critical challenge, driven by diverse and antibiotic-resistant bacteria. To address this issue, we propose the modification of the SPEEK surface using a thin graphene oxide (GO) film containing silver (Ag) ions. The resulting coating exhibits substantial antibacterial effects against various pathogens, including Staphylococcus aureus, Escherichia col…

Fracture strength of implant-supported hybrid abutment crowns in premolar region fabricated using different restorative CAD/CAM materials.

The present study investigated the fracture strength of hybrid abutment crowns (HACs) in the premolar region that were fabricated with different restorative computer-aided design/computer-aided manufacturing (CAD/CAM) materials. The abutment-implant structures were randomly assigned into four groups (n=11 per group): bi-layered zirconia restorations (BL), translucent zirconia (4Y-PSZ) restorations (TZ), lithium disilicate ceramic restorations (LD), and dispersed nanoparticle-filled composite resin restorations (CM). All restorations were adhesively bonded to the titanium abutments. After the r…

[Elastic, stable intramedullary nailing of pertrochanteric femoral fractures in children (<6-8 years)].

OBJECTIVE: Minimally invasive, sufficiently stable for movement and partial weight bearing, osteosythesis of pertrochanteric femoral fractures in children < 6-8 years using elastic, stable intramedullary nailing (ESIN). INDICATIONS: Proximal, pertrochanteric femoral fractures Delbet type IV in children < 6 years. CONTRAINDICATIONS: Comminuted fractures, femoral neck fractures. SURGICAL TECHNIQUE: By inserting three elastic titanium nails (TEN), prebent in the proximal third, retrograde into the femur, a stable 3‑point support stabilizes the proximal fragment. For further improvement of stab…

[Differential approach for chest wall reconstruction for pectus excavatum in adults].

AIM: To perform the prospective non-randomized single-center trial of pectus excavatum correction in adults. MATERIAL AND METHODS: For the period March 2012 - March 2016 64 patients aged 18-44 years were treated. Median age was 23 years. Male/female ratio was 41/23. All patients were included into standard survey protocol: chest MDCT, MRI of thoracic spine, pulmonary function test, echocardiography. Quality of life and complications rate after the Nuss procedure (n=50, 78.1%, group 1) and radical thoracoplasty using nikelid-titanium bar (n=14, group 2) were evaluated. RESULTS: There was earl…

Debilitating lung disease among surface coal miners with no underground mining tenure.

OBJECTIVE: To characterize exposure histories and respiratory disease among surface coal miners identified with progressive massive fibrosis … sis and interstitial accumulation of macrophages containing abundant silica, aluminum silicate, and titanium dust particles. CONCLUSIONS: Overexposure to respirable silica resulted in progressive massive fibrosis among current surface coal miners with no underground mining tenure. Inadequate dust control during drilling/blasting is likely an important eti …

Rare giant frontal sinus osteoma mimicking fibrous dysplasia.

OBJECTIVE: To present the first report of a giant frontal sinus osteoma treated by excision and single-stage reconstruction with custom-made titanium cranioplasty and left orbital roof prostheses. CASE REPORT: A 31-year-old man with a history of chronic frontal sinusitis presented with a deforming, painless, midline forehead swelling of 11 years' duration, which had been treated unsuccessfully in Nigeria. Differential diagnosis included both benign and malignant bony tumours. Computerised tomography revealed a giant bony frontal sinus tumour extending beyond the sinus roof and breaching the l…

Углеродные бриллиантовые покрытия для хирургических инструментов сокращают количество белков и прионово-амилоидных биообращений и улучшают последующую очистку.

Углеродные углеродные покрытия (DLC) могут быть противообрастающими поверхностями против микробных и белковых соединений. В частности, хирургические инструменты из нержавеющей стали подвергаются воздействию тканевого белка и стойкого прионного белка, что делает неэффективными методы обеззараживания, используемые в стерильных отделениях обслуживания, что потенциально повышает риск ятрогенического креуцфельда-Якоба во время хирургических операций. В ходе этого исследования были проанализированы адсорбция белков и амилоидов, связанных с прионом, на поверхностях ДКН и эффективность коммерческих чи

Совпадение в аннотации оригинала
Doped diamond-like carbon (DLC) coatings offer potential antifouling surfaces against microbial and protein attachment. In particular, stain … s and the efficacy of commercial cleaning chemistries applied to these spiked surfaces, compared to titanium nitride coating and stainless steel. Surfaces inoculated with ME7-infected brain homogenate were visualised using SYPRO Ruby/Thioflavin T staining and modified epi-fluorescence microscopy before and after cleaning. Reduced protein and prion amyloid …

Lung pathologic findings in a local residential and working community exposed to World Trade Center dust, gas, and fumes.

OBJECTIVE: To describe pathologic findings in symptomatic World Trade Center-exposed local workers, residents, and cleanup workers enrolled … fringent particles within macrophages, and examined particles contained silica, aluminum silicates, titanium dioxide, talc, and metals. CONCLUSIONS: In symptomatic World Trade Center-exposed individuals, pathologic findings suggest a common exposure resulting in alveolar loss and a diverse response to injury.

Primary oromandibular reconstruction using free flaps and thorp plates in cancer patients: a 5-year experience.

BACKGROUND: Low-profile second-generation THORP titanium plates combined with soft tissues free flaps (forearm or TRAM) can be used for oromandibular reconstruction in patients with SCC in advanced stage (stage III-IV). METHODS: To evaluate long-term stability and possible complications of this reconstructive technique, we recorded, retrospectively, data of 25 patients with posterolateral oromandibular defects after tumor resection collected during a 5-year period. RESULTS: All free flaps were successfully transferred, although eight patients were initially seen with delayed hardware-related…

Dispersion-Contrasting Dual-Layer Metalens for Hybrid Chromatic-Aberration Correction in the Visible.

Metalenses offer a pathway toward flat, wafer-level optics, but their translation to mobile imaging has been hindered by the difficulty of achieving broadband performance at millimeter-scale apertures. Here we report a visible metalens that imparts a wavelength-invariant phase profile in a hybrid configuration with refractive elements. Central to this advance is a dispersion-contrasting metasurface that achieves broadband phase control using simple, photolithography-compatible nanostructures. Built from stacked silicon nitride nanohole and titanium dioxide nanopost arrays with opposite dispers…

Homotopic Vortex Lasing Mediated by a Resonant Geometric Phase in a Bound States in the Continuum Cavity.

Geometric phases are fundamental to wave physics and underpin a broad range of optical phenomena. The most prominent example, the Pancharatn … BIC resonances. To experimentally validate this concept, we realize metasurface lasers composed of titanium dioxide hole arrays integrated with CdSe/CdxZn1-xS core/shell colloidal quantum wells as the gain medium. Our results reveal a previously unexplored form of spin-orbit interaction in BIC cavities under oblique incidence and provide a versatile route …