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Surgical correction of pectus excavatum and carinatum.

This paper contains an analysis of the long-term results in 85 patients who had pectus excavatum or carinatum deformities repaired at the North Middlesex Hospital between 1951 and 1977. Seventy-seven patients had operations for correction of pectus excavatum and eight for pectus carinatum. A variety of surgical techniques was used. In the excavatum deformities the best results were obtained by the extensive resection of all deformed cartilages, the correction of the sternal deformity by a simple transverse wedge osteotomy, and by stabilising the chest with a stainless steel plate. For pectus c…

Evaluation of foreign bodies in the maxillofacial region with cone beam computed tomography and ultrasonography: an ex vivo study.

BACKGROUND: When foreign bodies in the human body are not diagnosed (detected), it can cause various inflammatory reactions. Therefore, they … tooth, graphite, composite, plastic, and stone) and orthodontic materials (Elgiloy wire, TMA wire, stainless steel wire, stainless steel bracket, and ceramic bracket) with different sizes were placed on the mandibular cortical bone and in the tongue of a sheep's head. Foreign bodies' visibility and diameter measurements were made with CBCT and US. Data were stat …

During which stage does maximum expansion occur in the passive self-ligating system?

OBJECTIVES: To evaluate the stage-specific contribution of each archwire to transverse arch development in a passive self-ligating (PSL) system using multilandmark digital measurements. MATERIALS AND METHODS: Twenty-one adults with mild-to-moderate crowding were treated with a PSL system using a standardized archwire sequence: 0.013-inch CuNiTi (S1), 0.014 × 0.025-inch CuNiTi (S2), 0.018 × 0.025-inch CuNiTi (S3), and 0.019 × 0.025-inch stainless steel (S4). Transverse measurements were made at cuspal, centroid, and palatal/lingual landmarks on digital models at baseline (S0) and after each ar…

Biocompatibility, Durability, and Stability Assessment of an Unconstrained Metacarpophalangeal Joint Prosthesis With Zirconia (ZrO2) Crowns at Metacarpal and Polyether-Ether-Ketone at Proximal Phalanx.

PURPOSE: Rheumatoid arthritis often affects the metacarpophalangeal (MCP) joints, resulting in pain, deformity, and loss of hand function. In advanced disease, arthroplasty provides superior functional outcomes compared with arthrodesis. The development of small joint prostheses remains a challenge, particularly in terms of long-term durability, biocompatibility, and stability. METHODS: A novel unconstrained MCP joint prosthesis was designed with zirconia crowns on the metacarpal side and polyether-ether-ketone (PEEK) crowns on the proximal phalanx, each supported by stainless steel stems. Bi…

Orthodontic appliances and MR image artefacts: An exploratory in vitro and in vivo study using 1.5-T and 3-T scanners.

PURPOSE: The aim of this study was to assess the artefacts of 12 fixed orthodontic appliances in magnetic resonance images obtained using 1.5-T and 3-T scanners, and to evaluate different imaging sequences designed to suppress metal artefacts. MATERIALS AND METHODS: In vitro, study casts of 1 adult with normal occlusion were used. Twelve orthodontic appliances were attached to the study casts and scanned. Turbo spin echo (TSE), TSE with high readout bandwidth, and TSE with view angle tilting and slice encoding for metal artefact correction were used to suppress metal artefacts. Artefacts were

[Research of the peak force of pullout about different thoracic hemi-epiphyseal compression staples in animal].

OBJECTIVE: To evaluate the initial dislocation resistance of the pullout force of different material or different type of goats thoracic hemi-epiphyseal compression staples. METHODS: According to the measuring anatomic data of thoracic vertebra (T6 approximately T11) specimens in goats (age 2 approximately 3 months), we designed stainless steel staple whose original distances between two opened prone were 10 mm and three kinds of shape memory alloy (SMA) staples whose original distances between two opened prone were respectively 5.0, 6.5 and 8.0 mm. Four specimens were used and each was cut i…

Covalent attachment of proteins to functionalized polypyrrole-coated metallic surfaces for improved biocompatibility.

Stainless steel has been widely used as an implant material for various biomedical applications, but its biocompatibility is still a major issue. Though polymer coating is one of the solutions, biomolecule-attached polymer coating is a better alternative. In this paper, we have synthesized a biomolecule (bovine serum albumin, BSA)-derivatized polymer coating on a stainless steel (316L) surface and evaluated it for biocompatibility. The monomer used for coating was obtained by hydrolyzing 1-(2-cyanoethyl) pyrrole to 1-(2-carboxyethyl) pyrrole followed by activation with N-hydroxysuccinimide to …

A modified efficient purse-string stapling technique (mEST) that uses a new metal rod for intracorporeal esophagojejunostomy in laparoscopic total gastrectomy.

Intracorporeal esophagojejunostomy after laparoscopic total gastrectomy is technically difficult because this procedure should be performed … tapling technique (EST). More recently, we have developed a modified EST (mEST) that utilizes a new stainless steel anvil rod instead of a plastic rod. Relative to the plastic rod, the steel rod is reusable and shorter; thus, it was easier to perform anvil placement into the esophagus with the steel rod. Anvil preparation for mEST: a stainless steel rod is attach …

Some aromatic hydrazone derivatives as inhibitors for the corrosion of C-steel in phosphoric acid solution.

The effect of furfural benzoylhydrazone and its derivatives (I-VII) as corrosion inhibitors for C-steel in 1M phosphoric acid solution has been studied by weight-loss and galvanostatic polarization techniques. A significant decrease in the corrosion rate of C-steel was observed in the presence of the investigated inhibitors. This study revealed that, the inhibition efficiency increases with increasing the inhibitor concentration, and the addition of iodide ions enhances it to a considerable extent. The effect of temperature on the inhibition efficiency of these compounds was studied using weig

Mechanical effect of different patterns for preparation of orthodontic appliances: An experimental study.

Archwire bending is the key to orthodontic treatment, and multi-time bendings are inevitable during manual and robotic automated bending. The purpose of this paper is to quantitatively evaluate the mechanical effects of the different preparation modes and to compare the mechanical properties of the orthodontic loops in one and multiple bends. Three types of typical stainless steel orthodontic loops (vertical loop, T-loop, and L-loop) were used to quantify the mechanical effect of patterns for preparation by experimental comparison between loops with different bending times by using an orthodon…

The behaviour of the periodontal ligament is influencing the use of new treatment tools.

Orthodontic treatment can cause resorptions on teeth. Factors causing resorptions are forces and moments. Other factors that cause resorptions are less influenced by an orthodontic treatment. By carrying out experiments and finite element calculations, it was possible to demonstrate that forces and moments will produce stress in certain parts of the periodontal ligament and the root. This stress reaches or exceeds the blood pressure in some areas. To avoid high pressure in those areas, new treatment devices were constructed consisting of NiTi wires or a combination of NiTi and stainless steel.…

Electrode-oxygen consumption and its effects on tissue-oxygen tension. A study by mass spectrometry.

A theory for the mechanism of electrical bone stimulation proposes that passage of an electric current reduces the local PO2 and raises the pH near the cathode, thereby creating a favorable environment for osteogenesis. To study the effects of electric current passage on the PO2, PCO2 and pH in the vicinity of the electrodes in vivo, a wire electrode spiralled around the catheter of a clinical mass spectrometer was placed in dog muscle. Electrodes were made of stainless steel or platinum. With a cathode located in the tissue, a 20-microA direct constant current caused a drop in PO2 of 5-10 mmH…

Galvanized caging as a potential factor in the development of the "fading infant" or "white monkey" syndrome.

Four rhesus females and their infants were kept in galvanized enclosures, and three were kept in stainless steel caging. All four offspring in the galvanized enclosures developed achromotrichia, alopecia, and weakness that varied from modererate to severe while the three infants in stainless steel cages were clinically normal. Plasma copper, zinc, and iron values as well as liver copper and zinc values of the infants were compared for the two types of caging. Plasma copper values were significantly lower (p less than 0.001) in the animals housed in galvanized cages. Plasma zinc and liver zinc …

Evaluation of in vivo biocompatibility of different devices for interventional closure of the patent ductus arteriosus in an animal model.

OBJECTIVE: To evaluate the in vivo biocompatibility of three different devices following interventional closure of a patent ductus arteriosus (PDA) in an animal model. MATERIALS AND METHODS: A medical grade stainless steel coil (n = 8), a nickel/titanium coil (n = 10), and a polyvinylalcohol foam plug knitted on a titanium wire frame (n = 11) were used for interventional closure of PDA in a neonatal lamb model. The PDA had been maintained by repetitive angioplasty. Between one and 278 days after implantation the animals were killed and the ductal block removed. In addition to standard histolo…

Innovative extraction materials for fiber-in-tube solid phase microextraction: A review.

Fiber-in-tube solid-phase microextraction (fiber-in-tube SPME) with short capillary longitudinally packed with fine fibers as extraction device allows direct coupling to high performance liquid chromatography (HPLC) systems to determine weakly volatile or thermally labile compounds. This technique associates the advantages of miniaturized and analytical on-line systems. Major achievements include the use of different capillaries (fused-silica, copper, stainless steel, polyetheretherketone (PEEK), or poly(tetrafluoroethylene) (PTFE)) that are packed with neat fibers (Zylon®, silk, or Kevlar 29®…

Stability of mpox virus on different commonly contacted surfaces.

Mpox is still spreading globally and is mostly reported to be transmitted by skin and mucosal contact. However, transmission through contact with fomites, contaminated objects, or surfaces has been reported in general population. Evaluation of the stability of mpox virus (MPXV) on different surfaces is important to minimize mpox transmission. In the study, the stability of MPXV on different kinds of commonly contacted surfaces was determined. MPXV was observed to have a surface-dependent stability pattern. Viable virus was detected on both glass and stainless steel for up to 5 days, and on pla…

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, stainless steel surgical instruments are subject to tissue protein and resilient prion protein attachment, making decontamination methods used in sterile service departments ineffective, potentially increasing the risk of iat…

Detachment of an EluNIR Drug-Eluting Stent Spring Tip.

During a coronary intervention, the stainless-steel spring tip incorporated into the EluNIR drug-eluting stent detached from the delivery system while we were retrieving the balloon. The spring was captured.

Efficacy of common disinfectants used in Malaysia against isolates of vancomycin-resistant enterococci (VRE) on surfaces simulating poultry farm environment.

BACKGROUND: Vancomycin-resistant enterococci (VRE) are significant causes of hospital-acquired infections and may persist in farm environmen … s faecium isolates from chickens and healthy farm workers. METHODS: The influence of surface type (stainless steel and wood) and organic soiling on disinfectant performance was evaluated according to the European surface test protocol (EN 14349), microbiocidal effect (ME) was measured under clean and soiled conditions. RESULTS: Under clean conditions, all disin …

Phage cocktails for the disinfection of carbapenem-resistant Klebsiella pneumoniae on high-touch surfaces in intensive care units.

BACKGROUND: Carbapenem-resistant Klebsiella pneumoniae (CRKP) is a major cause of hospital-acquired infections, particularly in intensive care units (ICUs). Chemical disinfectants are widely used for environmental decontamination in ICUs. However, their long-term application is associated with bacterial tolerance, material corrosion, and reduced lifespan of frequently touched surfaces. Environmentally friendly and effective alternative disinfection strategies are therefore urgently needed. RESULTS: CRKP remained viable on high-touch ICU surfaces for at least 72 h on stainless steel and up to …