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and structural damage were observed from basalt rock near the interface with cement (Figure 2.7). Sample #8 showed major initial fractures along the interface between cement and basalt almost from top to bottom, indicating a weak bond between cement and basalt, which is similar to sample #7.
was no difference in constraint of implant (P = 0.818), cement type (P = 0.340), patella resurfacing (P = 0.286), age (P = 0.984), (P = 0.376) or initial mechanical axis deviation (P = 0.054) between groups. Discussion The main findings of this study were that there was a high preva-lence of early PPRL at the implant–cement interface ...
Factors affecting the cement-post interface. Dent Mater. 2012; 28(3):287-97 (ISSN: 1879-0097) Zicari F; De Munck J; Scotti R; Naert I; Van Meerbeek B. OBJECTIVES: To evaluate the effect of different factors on the push-out bond strength of glass fiber posts luted in simulated (standard) root canals using different composite cements.
May 18, 2018· Stresses in the cement‐cup interface were generally higher than the stress in the trabecular bone‐cement interface (by 17.6%, 17.6%, and 11% for the 28, 32, and 36 mm head sizes respectively for the average weight patient and by 14.7%, 11.4%, and 14.3% for the 28, 32, and 36 mm head sizes respectively for the overweight patient) but lower ...
Jul 01, 2020· The casing-cement-formation interface radial bond strength was tested. • The tensile stress on the casing-cement-formation interface was studied by ABAQUS. • The experiment and simulation results were combined to provide suggestions and measures for ensuring the integrity of cement ring interface.
The porosity of the bone cement interface in hip resurfacing was calculated from digitised black and white photographs using MatLab software. Results: The mean porosity was 0.63. Increased porosity was associated with larger femoral heads in both the coronal and sagittal dimensions and cysts in the femoral head. It was not associated with ...
debonding of the implant-cement interface [2]. Failure of the implant-cement bond causes the implant to become mechanically loose, resulting in unintended micromotion at the cement-bone interface [3]. This movement between the cement and bone will initiate bone resorption and lead to gross loosening of the implant. It is therefore critical to have
Aug 27, 2019· Shear experiments were conducted on the cement mortar–sandstone bonding interface and the materials themselves to investigate their loss of shear strength and the deterioration mechanism caused by freezing and thawing cycles. The experimental results show that the shear strength of the bonding interface is much lower than that of the original materials themselves under the same normal .
Cement-soil mixture is generally produced in situ by wet/dry soil mixing or jet grouting. Fig. 1a illustrates the phase composition for typical cement-soil mixtures.It is noteworthy that the water content of cement-soil mixture depends on three factors: (a) the method of cement introduction (dry powder or slurry); (b) the moisture condition of the natural soil; (c) the undergoing degree of the ...
ABB is at the center of the digital transformation with its system, ABB Ability™ Expert Optimizer, part of its dedicated digital portfolio of solutions for the cement industry. Other systems include ABB Ability™ Cement Optimize, as well as its ready-to-use tailor-made automation solution for mining and cement, ABB Ability™ System ...
The absence of adhesive failure between cement and PMMA block used in this study suggested that the model used in the current study was reliable in testing the post-cement interface. To our knowledge, the PMMA blocks used in this study have not been used in any previous study to investigate the bond strength of the post-cement interface.
Jan 10, 2008· Introduction. The cement–bone interface is one of the critical factors for the longevity of cemented THA. Cementing technique has improved with the advent of cement guns, pulsatile lavage, and intramedullary bone plugs for the femur [12–14], and flanged sockets for the acetabulum [].Multiple small anchoring holes in the acetabulum improve the mechanical bonding at the cement–bone interface.
cement interface [9,10]. Variable intrinsic bone cement properties as well as extrinsic differ-ences from varying cement preparation and application techniques are among many factors that effect the strength and stability of the bone– cement–implant construct. Polymerization of bone cement progresses
Effect of nanofiller on interface between aggregate and cement mortar were studied. • Nanofillers can effectively modify interfacial bond strength and microstructures. • Adding nanofillers can lead to an increase of 2.56 MPa/42.8% in bond strength. • Local nanofiller content in interface is higher than that in bulk cement mortars. •
The fracture toughness of implant/cement interfaces is a mechanical property that measures the resistance to propagation of a crack originated at the interface. Our previous research [ 6 ] reported that the addition of the micron and nano sized MgO particles to PMMA improved the fracture toughness of bone/cement union due to increased surface ...
The tailored samples containing cement-mudcake interface were mounted on ESEM stubs (enabling the inspection of the relevant area of interest), sputter-coated with 10 nm of gold and were finally examined by ESEM (QUANTA 200; FEI, USA). Specific surface areas were considered, focusing with different magnifications at an accelerating voltage of ...
The densities inside the bone-cement interface at −3 mm are significantly lower for the void-creating procedures: 5.9% ± 8.6% for vertebral stenting and 2.9% ± 4.4% for balloon kyphoplasty compared with 9.9% ± 3.2% for RF kyphoplasty and 8.8% ± 7.6% for shield kyphoplasty (P < .0001) . It is noteworthy that no trabecular structures are ...
Too high, and the risk of thermal necrosis 4 and BCIS 5 increase; too low, and the cement-bone interface provides more reduced shear strength, as well as a higher risk of aseptic loosening and revision over time. 6 High intrusion also reduces the amount of bone stock remaining in the event of revision. 7 Importantly, the high intrusion of ...
cement indiasand cement interface . cement grinding process in gwalior india cement grinding process in gwalior india cement mill at bhatinda grinding mill equipment cement grinding process in gwalior india Ltd and 2 50 000 No of equity shares to the Gwalior Rayon Silk Mfg WVG -A new cement grinding mill of 1 25 MTPA was commissioned in 2014 .
We investigated the adherence of two cementitious materials, calcium phosphate cement (CPC) and silica flour‐filled class G cement (CGC), to metal substrates, such as cold‐rolled steel (CRS), stainless steel (SS), electroplated zinc‐coated steel (EZS), and zinc phosphate‐coated steel (ZPS) after autoclaving at 200°C.
Jul 15, 2020· In this study, a method is proposed for modifying aggregate with Bayer red mud (RM), and the bond strength and microstructure of the interfacial trans.
Beck, J, Feng, R, Hall, DM, Buyuksagis, A, Ziomek-Moroz, M & Lvov, SN 2016, Effects of H 2 S and CO 2 on cement/casing interface corrosion integrity for cold climate oil and gas well applications. in RG Buchheit & S Virtanen (eds), Corrosion General Session. 17 edn, ECS Transactions, no. 17, vol. 72, Electrochemical Society Inc., pp. 107-122 ...
Farran (1) was among the first to note that the interface formed between aggregate and '_ulk" cement paste was not sharp, and that the cement paste in contact with the a_m'egate differed from the '_ulk" cement paste. Barnes et al. (2,3) and more recently Yuan and Odler
The cement–bone interface plays an important role in load transfer between cemented implant systems and adjacent bone, but little is known about the micromechanical behavior of this interface following in vivo service. Small samples of postmortem‐retrieved cement–bone specimens from cemented total hip replacements were prepared and ...
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