Minimum Thickness Research Articles

A fully coupled finite element solution for the mixed elastohydrodynamic lubrication of finite line contacts

A fully coupled FE model for mixed EHL of finite line contacts is proposed, integrating all of the governing equations into a monolithic system. The solution reveals the fully coupled model achieves 5% higher accuracy and 50% greater efficiency compared to the weakly coupled one. Additionally, there is evidence to support the assertion that profiling contributes to the mitigation of surface roughness contact. Logarithmic profiling can increase the minimum film thickness by a factor of 30, resulting in a reduction of up to 64.6% in the maximum asperity contact pressure, and thus, the boundary friction force is decreased by more than 19%, under heavy-load low-velocity condition. This contributes to the reduction of abrasive wear.

Lightweight graphene foam composites with enhanced electrical conductivity and microwave absorption for electromagnetic interference shielding

Next-generation flexible electronics call for high-performance electromagnetic interference (EMI) shielding materials with lightweight and multifunctionality. Here, the chemical vapor deposition (CVD) graphene foam (GF) composites, containing flexible polymer matrix and magnetic Fe3O4 nanoparticles, are reported. The systematic manipulation of GF growth condition and the content of Fe3O4 reveals the effect of graphene thickness and integration of Fe3O4 on improving the electromagnetic shielding performance of composites. Owing to abundant internal interfaces, high conductivity from the three-dimensional interconnected graphene, and magnetic loss from Fe3O4, the ternary composites exhibit substantial improvement in microwave absorption, resulting in a superior EMI shielding effectiveness (SE) and absolute EMI SE up to 71 dB and 3641 dB·cm2/g, respectively, at a low density of 0.65 g/cm3 and minimal thickness of 0.3 mm. Moreover, the flexible composites display great EMI shielding stability after repeatedly bending, validating the composites as promising materials for practical applications in aerospace and flexible electronics.

Mangroves as Coastal Protection for Restoring Low-Energy Waterfront Property

Mangroves offer vital ecological advantages including air and water filtration, coastal and estuarine habitat provision, sediment stabilization, and wave energy dissipation. Their intricate root systems play a key role in safeguarding shorelines from tsunamis and erosive storms by dissipating wave energy. Moreover, mangroves shield against boat wakes and wind-waves, thus naturally bolstering shoreline defense. Wave dissipation is a function of forest width, tree diameter, and forest density. Restoration efforts of juvenile mangroves in Florida’s Indian River Lagoon (IRL) aim to reduce wave energy in areas vulnerable to erosion. Physical model testing of wave dissipation through mangroves is limited due to the complexity in representing the mangrove structure, where prop roots are non-uniform in both diameter and location. Previous studies have quantified wave-dissipating effects through the use of scaled and parameterized mangrove structures. This study measures the dissipation effects of live mangroves in a wave flume, forced by conditions representative of the IRL. These measurements are used to validate a parameterized dowel model. Error between wave attenuation factors for the live mangrove and dowel system was on average 2.5%. Validation of the modularized dowel system allowed for further parameterized testing to understand forest structure effects, such as sediment stabilization and wave attenuation. Maximum wave attenuation achieved in this study was 27–35% corresponding to a 40–60% reduction in wave energy depending on the configuration of the system. The wave reduction resulted in a 50–70% decrease in sediment erosion from the berm. The dowel tests indicate a target minimum thickness for mangrove root systems of 0.6 m for shoreline stabilization and restoration in the IRL.

In-hospital initiation of a PCSK9 inhibitor in patients with acute coronary syndrome: A systematic review and meta-analysis of randomized controlled trials.

Proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitors have been shown to be effective and safe in patients with stable angina and previous myocardial infarction. However, evidence for initiating their use in patients hospitalized with acute coronary syndrome (ACS) is limited. This systematic review and meta-analysis was performed to provide more clinical evidence. PubMed, Embase, OVID, Cochrane Library and ClinicalTrials.gov were systematically searched for eligible randomized controlled trials up to March 20, 2023. The risk ratios, standardized mean differences and 95% confidence intervals were calculated for primary and secondary outcomes. The bias risk of the included studies was assessed using the Cochrane RoB 2 criteria. About 8 randomized controlled trials involving 1255 inpatients with ACS were included. PCSK9 inhibitor treatment significantly reduced low-density lipoprotein cholesterol (LDL-C) (SMD -1.28, 95% CI -1.76 to -0.8, P = .001), triglycerides (TG) (SMD -0.93, 95% CI -1.82 to -0.05, P = .03), total cholesterol (SMD -1.36, 95% CI -2.01 to -0.71, P = .001), and apolipoprotein B (Apo B) (SMD -0.81, 95% CI -1.09 to -0.52, P = .001) within approximately 1 month. PCSK9 inhibitor treatment significantly reduced the total atheroma volume (TAV) (SMD -0.33, 95% CI -0.59 to -0.07, P = .012). It also significantly increased minimum fibrous cap thickness (FCT) (SMD 0.41, 95% CI 0.22-0.59, P = .001) in long-term follow-up (>6 months). PCSK9 inhibitor treatment significantly reduced the risk of readmission for unstable angina (RR 0.32, 95% CI 0.12-0.91, P = .032) in short-term follow-up (<6 months). There were no significant differences in all-cause mortality, cardiovascular death, myocardial infarction, ischemic stroke, coronary revascularization or heart failure. Only nasopharyngitis (RR 1.71, 95% CI 1.01-2.91, P = .047) adverse events were significantly observed in the PCSK9 inhibitor group. Application of a PCSK9 inhibitor in hospitalized patients with ACS reduced lipid profiles and plaque burdens and was well tolerated with few adverse events.

Fundamental absorption bandwidth to thickness limit for transparent homogeneous layers

Abstract Past work has considered the analytic properties of the reflection coefficient for a metal-backed slab. The primary result established a fundamental relationship for the minimal layer thickness to bandwidth ratio achievable for an absorber. There has yet to be establishment of a similar relationship for non-metal-backed layers, and here we present the universal result based on the Kramers–Kronig relations. Our theory is validated with transfer matrix calculations of homogeneous materials, and full-wave numerical simulations of electromagnetic metamaterials. Our results place more general fundamental limits on absorbers and thus will be important for both fundamental and applied studies.

Non-Destructive Testing of a Fiber-Web-Reinforced Polymethacrylimide Foam Sandwich Panel with Terahertz Time-Domain Spectroscopy.

Terahertz (THz) non-destructive testing can detect internal defects in dielectric materials. However, this technology is mainly used for detecting thin and simple structures at present, lacking validations for the detection effectiveness of internal defects in thicker and more complex structures, such as fiber-web-reinforced composite sandwich panels. In this study, samples of fiber-web-reinforced polymethacrylimide foam sandwich panels, which are, respectively, 20 mm and 30 mm thick, were made to detect the internal debonding, inclusion, pore, and crack defects by the THz time-domain spectroscopy system (THz-TDS). The peak-to-peak-imaging algorithm, maximum-amplitude-imaging algorithm, minimum-amplitude-imaging algorithm, pulse-width-imaging algorithm, and time-of-flight-imaging algorithm were used to process and image the collected THz signals. The results showed that the peak-to-peak-imaging algorithm had the best performance. To address the low imaging resolution of THz-TDS, a block-based super-resolution reconstruction method-SSSRGAN-is proposed, which can improve image resolution while maintaining the clear edge contours of defects. The defect-detection results of the samples showed that THz-TDS could detect all pore, debonding, and crack defects, with a minimum size of 3 mm for pores and debonding and a minimum thickness of 1 mm for cracks. The method showed poor detection performance for inclusions with a thickness of 0.053 mm, but could still extract the defect features. Based on the THz-TDS reflection mode measurement principle, the thickness information of the panel, foam core, and web of the samples was calculated: the measurement error was no more than 0.870 mm for Sample #1 and no more than 0.270 mm for Sample #2, demonstrating the accuracy of THz-TDS in measuring the dimensions of sandwich panel structures. In general, THz technology shows potential for detecting internal defects and performing dimensional measurements in complex structures. With the advancement of portable devices and enhancements in detection speed, real-time on-site detection is anticipated in the future.

IMPROVEMENT OF A POP-UP BOOM CAPABLE OF OPERATING IN ICE CONDITIONS ON RIVERS

The article discusses the relevance of using pop-up booms on rivers, including in the presence of ice cover. An assessment of existing solutions was carried out and an improved model of a pop-up boom with increased holding capacity was proposed. The work provides a calculation to determinethe shape of a pop-up boom to avoid the formation of unacceptable «pockets», and also derives the relationship between the diameter of the buoyancy chamber of a pop-up boom and the minimum permissible thickness of the ice cover to prevent mixing of ice and oil.

The chip generation and removal mechanisms of thermal-assisted polishing monocrystalline 4 H-SiC

The chip generation and removal characteristic of SiC in thermal-assisted nano-abrasion are investigated using molecular dynamics simulation. Varieties of minimum uncut chip thickness (MUCT) with different thermal-assisted conditions are inferred. Thermal-assisted extreme manufacturing is additional considered. The simulation results reveal that the atomic removal of 4 H-SiC substrates is easier with the thermal-mechanical coupling effect in nano-abrasion, however, not change significantly in compound thermal-assisted nano-abrasion. The removal efficiency witnesses a rise as the thickness of thermal affected region increases, while tends to be stable at a higher thickness. MUCT decreases with increasing the external temperature in coupling thermal-assisted processing, while keep stable in compound thermal-assisted processing. Chip generation and damage-free features of 4 H-SiC are observed in coupling thermal-assisted extreme manufacturing.

Design and Simulation of Hydraulic Integrated Valve based on SLM Technology

Intelligent robots put forward the need for miniaturization and integration of hydraulic systems. Based on SLM technology, this paper designs a hydraulic integrated valve, integrates flow channels, adapters and other facilities on the valve body, replaces the original linear movement scheme with a rotating spool scheme, studies parameters such as runner diameter and minimum wall thickness, and simulates and analyzes the flow performance of liquid when the main control runner and a single valve work. The results show that the integrated valve has the advantages of light weight, small size and good performance.

Measurement of Nuchal Translucency Thickness in First Trimester Ultrasound Foetal Images Using Markov Random Field

Background The first-trimester ultrasound assessment of nuchal translucency (NT) thickness has lately been recommended as the most helpful sign in early screening for prenatal chromosomal disorders. Increased foetal NT thickness between 11 and 13+6 weeks of gestation is a frequent phenotypic manifestation of chromosomal abnormalities as well as a variety of foetal deformities and genetic disorders. Purpose At the moment, clinicians conduct the measurement manually. The measurement may take a long time to complete, requires highly competent operators, and is susceptible to mistakes. So, an automatic method is required for NT measurement. Materials and Methods This study proposes a Markov random Field-based approach for contextually segmenting the NT area from foetal pictures and offering a quick and inexpensive diagnostic even during the early stages of pregnancy. Results Proposed method gives maximum NT thickness error 0.03 and minimum NT thickness error 0.04. Conclusion The proposed research work developed a prototype for an automated NT thickness measuring system. This study proposes an MRF-based model for segmentation and detection of NT area from foetal pictures which gives error is less than other methods.

Resistance of thin sheets lap joints connected by spot welding and brazing

AbstractThe results of an experimental program on lap joints of thin gauge sheets connected by spot welding and MIG brazing are compared to the design code provisions. The results show the dependency of the spot weld lap joints resistance on the thickness of the connected sheets, while the MIG brazed lap joints resistance depends on the minimum thickness of the steel sheets connected. A statistical interpretation of the results shows the accuracy of the joint resistance. The coefficient of variation of the spot weld specimen is smaller than the one for the MIG brazed specimen, while the resistance of the spot weld is higher than the MIG brazed specimen when compared to the nominal resistances.

Avaliação do endotélio corneano através de microscopia especular em participantes com edema macular diabético

Introduction: While the morphological and functional integrity of the corneal endothelium, which is essential for corneal transparency, is affected by diabetes mellitus (DM), its relationship with the severity of diabetic retinopathy and the presence of diabetic macular edema is unclear. Aims: To assess the morphological characteristics of the corneal endothelium in patients with Type 2 Diabetes Mellitus (T2DM) with different therapeutic response profiles to diabetic macular edema (DME). Methods: With a cross-sectional approach, 24 participants with T2DM were divided into 2 groups (without DME versus with DME). Subsequently, the group with DME was subdivided according to the type of therapeutic response (responder versus persistent). Parameters obtained through specular microscopy (endothelial cell density, coefficient of variation, hexagonality, and central corneal thickness) and optical coherence tomography (minimum foveal thickness, central 1mm thickness, macular ganglion cell layer thickness, and peripapillary retinal nerve fiber layer thickness) were analyzed and compared in the different groups. Results: No significant changes were found in the corneal endothelium between the groups with and without DME (p&gt;0.05). However, differences were found in the density of endothelial cells (p=0.04) in participants with persistent DME (1900.3 ± 270.1) compared to participants with responding DME (2307.9 ± 121.2) and control group (2191.7 ± 165.5). Conclusion: There were no differences in the different parameters of the corneal endothelium between participants with and without DME. However, the kind of therapeutic response to DME seems to be associated with a decrease in endothelial cell density.

Determination of Yield Parameters and Quality Traits of Tomato (Solanum lycopersicum L.) Genotypes

The experiment was done to evaluate the performance of twenty genotypes of tomato in the Horticulture Research Farm of the Department of Horticulture, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh during Rabi Season of the year 2021-2022. Observations were recorded on five randomly selected competitive plants per replication for each entry on five randomly selected competitive plants per replication for each entry on nineteen quantitative and qualitative traits viz, plant height at 30, 60 and 90 days after transplanting (cm), number of primary branches, days to first flowering (days), days to 50 % flowering (days), days to maturity (days), number of flowers/cluster, number of clusters (truss) per plant, number of locule per fruit, pericarp thickness (mm), number of fruits per truss, number of fruits per plant, average single fruit weight (g), yield / plant (kg), fruit length (cm), fruit diameter (cm), total soluble solids (oBrix) and acidity (%). Among the genotypes used for evaluation Pusa Ruby (8.01 kg/plant) were observed to have higher yield per plant followed by Pusa Divya (7.33 kg/Plant) and Himsona (6.32 kg/plant), while the minimum was recorded in genotype Pusa Sadabahar (1.25kg/plant) followed by Kashi Sarad (1.57kg /plant) and Pusa Gaurav (2kg/plant). The minimum Pericarp thickness was found in genotype Pusa Upkar (3.25 mm), whereas maximum Pericarp thickness were observed in genotype Pusa Ruby (7.42 mm). For the minimum TSS (total soluble solids) was found in genotype Kashi Sarad (3.33) whereas, maximum TSS were observed in genotype Pusa Upkar (8.42). For the minimum Acidity % was recorded in genotype Kashi Amul (0.18%), whereas, the maximum Acidity % were observed in genotype Kashi Hemant (0.86%).

Optimizing Load Capacity Predictions in Gas Foil Thrust Bearings: A Novel Full-Ramp Model

Gas film thickness significantly influences the performance prediction of Gas Foil Thrust Bearings (GFTB). However, the Classical Model (CM) for GFTBs exhibits inaccuracies in describing gas film thickness. In this paper, we explore the differences in the details of gas film thickness modeling and propose a Parallel Segmentation Model (PSM), which fixes the errors of the CM in describing the gas film thickness in the ramp section, and a Full-Ramp Model (FRM), to which a more realistic description of the gas film in the flat section is also added. Comparative analysis, utilizing a publicly available test dataset based on the open-source GFTB structure, establishes that the FRM surpasses the CM and PSM in accurately predicting load capacity. In-depth analysis shows that the location of the minimum gas film thickness for determining the load capacity is located at the innermost circle of the free end of the top foil, whereas the FRM is subjected to the same load with a larger film thickness at this location, which may be due to the unique geometry of the top foil of the FRM. Subsequently, employing the FRM, a parametric study explores load capacity in GFTB, considering variables such as ramp height, top foil thickness, bump foil stiffness, ramp section extent, and top foil area. The results demonstrate that GFTB load capacity exhibits a linear increase with the expansion of the top foil area. Moreover, the load capacity increases with augmented top foil thickness and bump foil stiffness, albeit at a decreasing rate. Additionally, an increase in ramp section extent initially enhances load capacity, reaching a maximum value before declining. Similarly, an increase in ramp height initially augments load capacity, attaining a maximum before subsequent diminution.

Microcomputed tomographic evaluation of 6 NiTi files on the pericervical dentin and the smallest dentin thickness zones in mesial root canals of mandibular molars: an in vitro study.

The aim of this study was to evaluate six files on the pericervical dentin (PCD) and the smallest dentin thickness zones (SDTZ) in mesial root canals of mandibular molars. Sixty mandibular molars with two mesial canals and Vertucci configuration were aleatory allocated in 6 experimental groups of 10 molars and 20 root canals. Specimens were scanned before instrumentation using the SkyScan 1275 (Bruker microCT, Kontich, Belgium). Group 1 was treated with WaveOne Gold (WG), group 2 with Reciproc Blue (RB), group 3 with TRUShape (TS), group 4 with XP-endo Shaper (XP), group 5 with iRace (IR), and group 6 with TruNatomy (TN). After instrumentation, the molars were scanned again and the images recorded were reconstructed with the NRecon v.1.7 (Bruker micro-CT) and analyzed with CTAn v.1.20.8 software (Bruker micro-CT) quantifying the changes produced in the surface, volume, structure thickness, SMI, and centroids at the Pericervical Dentin area of the root canals (PCD) located from the root canal orifices at the floor of the pulp chamber to 4 mm in the apical direction, and the changes in the Smallest Dentin Thickness Zones (SDTZ) located (from the furcation to 4 mm and 7 mm in the apical direction. The data obtained were compared using Wilcoxon and ANOVA with a 5% significance level. XP and TN were similar in all the parameters (P >.05) at the PCD, but TN showed significant differences from WG, RB, TS, and IR (P <.05), while XP showed significant differences from WG (P <.05) in volume, surface, and structure thickness. Regarding the changes in the SDTZ, the amount of dentin removed was similar between the groups in both canals at the middle 1/3, at the cervical 1/3 for MB canals, and in ML canals for RB, TS, XP, IR, and TN (P>.05). The action of WG was significantly different from that of XP and TN in the cervical 1/3 of the ML canal (P <.05). XP and TN rotatory files with small taper and volume maintained better with minor changes at the PCD and SDTZ, while WG reciprocation file produced the largest change. All the files were maintained centered at the PCD, and their performances were safe with a minimal thickness higher 0.5 mm at the SDTZ, and without risk of perforation. No clinical trials were indicated in this study. The choice of endodontic files is a relevant factor in the conservative performance of root canal treatments.

Research on the lubrication performance of circular tilting pad thrust bearings for large wind turbines

AbstractIn view of the large temperature rise and impact load of thrust bearings in the main shaft system of large wind turbines, this article takes the circular tilting pad thrust bearings in large wind turbines as the research object, and analyses the basic theory of bearing lubrication. The lubrication performance calculation model established for this bearing includes the Reynolds equation, energy equation, film thickness equation, and elastic deformation equation. Theoretically analysing and calculating the lubrication performance of the circular tilting pad thrust bearing, the key performance parameters have identified such as minimum film thickness (hmin), temperature rise (ΔT), power consumption (W), and flow rate (Q). The calculation results show that the eccentricity ratio has a significant impact on the lubrication performance of the circular tilting pad thrust bearing. When both radial and circumferential eccentricity ratios are around 0.5, the bearing exhibits a high temperature rise, leading to a potential risk of bearing burnout. The results also show that at a radial eccentricity ratio of approximately 0.54, the minimum film thickness reaches its maximum value of 10.34 μm. Similarly, at a circumferential eccentricity ratio of about 0.60, the minimum film thickness reaches its peak value of 21.89 μm. This indicates that the eccentricity ratio plays a crucial role in the lubrication performance. In addition, the lubrication performance of the bearing under varying loads has been calculated at a speed of 9.5 r/min. The results demonstrated that the applied load significantly impacts the thrust bearing's performance. The findings elucidate the critical role of considering the eccentricity ratio and operational external load during the bearing design process. This study validates the potential of replacing rolling bearings with sliding bearings in wind turbine main shafts. It also provides a theoretical reference for the future design of sliding bearings.

Study on Heat Transfer Characteristics of High-Speed Herringbone Gear in Meshing Process Under Oil Injection Lubrication

Abstract To quantify the relationship between the total frictional heat and the absorbed heat by the oil film in the herringbone gear transmission, this article investigates the lubrication status and thermal characteristics of the tooth meshing point under the fuel injection condition. First, the contact analysis of the herringbone gears is carried out—studying the variation pattern of the maximum pressure, highest temperature rise, and minimum film thickness of different oil films at various mesh points along the meshing line. Second, the friction coefficient and frictional power for the meshing points on the tooth surface are calculated to determine the ratio of oil film pressure to total pressure distribution. This completes the allocation of frictional power for the meshing points of the driving and driven gears. Finally, by comparing the total heat generated by frictional shear with the heat absorbed by the oil film, the numerical relationship between the two can be quantified.

Gibberellic Acid and Planting Time Influence on the Growth and Yield of Cabbage (Brassica oleracea var. capitata L.)

The experiment was conducted at the Horticulture Farm of Sher-e-Bangla Agricultural University, Dhaka during the period from October 2018 to March 2019. The goal of this study was to determine when to sow cabbage and how much gibberellic acid to use in order to maximize growth and yield. The experiment consisted of two factors: Factor A: Planting time (three different times) as - T1= 05 November; T2= 20 November and T3= 05 December and Factor B: Gibberellic acid (four levels) as- G0= 0 ppm (control); G1= 75 ppm; G2= 95 ppm and G3= 115 ppm GA3, respectively. The two factors experiment was laid out in Randomized Complete Block Design with three replications. Due to the combined effect of Gibberellic acid and planting time, the maximum thickness of head (14.5 cm) and the highest marketable yield (59.4 t/ha) was found from T2G2 whereas the minimum thickness of head (10.8 cm) and the lowest marketable yield (37.1 t/ha) was found from T3G0. The economic analysis revealed that T2G2 gave the maximum benefit cost ratio (2.57). That’s why we can consider that 20thNovember planting time along with 95 ppm GA3 was the best combination for growth and yield of cabbage.

Does palynotaxonomy contribute to the systematics of the genus? The section Multicaulia of the genus Hedysarum (Fabaceae) example in Türkiye

The purpose of the current work was to assess the systematic and taxonomic significance of the pollen morphological characteristics of the Multicaulia section of Hedysarum species found throughout Türkiye using scanning electron microscopy (SEM) and light microscopy (LM) techniques. For this reason, seven different species currently classified in the Multicaulia section were collected from various localities. The pollen grains were nonacetolyzed, prepared and directly measured according to the Wodehouse method. Pollen grains were found to be subprolate in H. nitidum but prolate in others and the exine sculpturing pattern was determined to be microreticulate-perforate in six taxa while only H. varium subsp. syriacum had reticulate-perforate sculpture. The minimum exine thickness was measured at 0.96 μm in H. varium subsp. varium, while among the investigated species, H. nitidum had an exine measurement of 1.38 μm. In this study, multivariate analysis was used to investigate nine qualitative and quantitative features. Data cluster analysis revealed that the pollen characteristics were important in helping to distinguish the different species from one another. The results demonstrated that the genus Hedysarum of the section Multicaulia was divided into two major groups based on variations in pollen dimensions. The usefulness of certain pollen morphological traits was assessed, and the congruency of the palynomorphological investigations was examined. The findings demonstrated the significance of pollen micromorphology in precisely identifying and categorizing the Multicaulia section.

ОПТИМИЗАЦИЯ ЗАКЛЮЧИТЕЛЬНОГО ЭТАПА ПОДГОТОВКИ ЗУБНОГО ПРОТЕЗА НА ОСНОВЕ ДИОКСИДА ЦИРКОНИЯ К ФИКСАЦИИ ВО РТУ ПАЦИЕНТА

Laboratory study of the acid etching impact on the surface of domestic ceramic translucent zirconium dioxide-based samples by special acid composition has been conducted in order to improve the esthetic qualities of ceramic dentures based on zirconium dioxide as well as to reduce the risk of their breakage and debonding by improving the final treatment methods of the prosthesis surface before fixation in the oral cavity, namely special acid etching of the internal surface and fluorescent glaze applied only to the prosthesis areas visible at a wide smile. The adhesive strength to composite resin cement has been assessed and three different dental fluorescent glazes have been studied for bending strength of zirconium dioxide samples depending on the coating area. The issue of combined effect of the zirconium dioxide-based ceramic’s surface chemical preparation has been studied with a view to increasing both the adhesive strength and the esthetic characteristics. A conclusive reduction in the strength of zirconium dioxide-based ceramic samples after the ceramic coating of each of the studied fluorescent glazes and a significant increase in the adhesive strength of ceramic with composite resin cement after etching with a special composition are shown. To improve the esthetics of zirconium dioxide dental prostheses, prevent the fractures of prostheses and reduce the possibility of their debonding in the oral cavity, it is recommended to apply fluorescent glaze with a minimum sufficient thickness and only on the vestibular and partially occlusal zones, and before fixing to composite resin cement in the oral cavity it is advisable to carry out chemical treatment of the ceramics’ bonded surface with a special etching solution.