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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
debonding of the implantcement interface [2]. Failure of the implantcement bond causes the implant to become mechanically loose, resulting in unintended micromotion at the cementbone 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
Factors affecting the cementpost interface. Dent Mater. 2012; 28(3):28797 (ISSN: ) Zicari F; De Munck J; Scotti R; Naert I; Van Meerbeek B. OBJECTIVES: To evaluate the effect of different factors on the pushout bond strength of glass fiber posts luted in simulated (standard) root canals using different composite cements.
was no difference in constraint of implant (P = ), cement type (P = ), patella resurfacing (P = ), age (P = ), (P = ) or initial mechanical axis deviation (P = ) between groups. Discussion The main findings of this study were that there was a high prevalence of early PPRL at the implant–cement interface ...
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 ...
interface behavior of deformed bar in cementsoil mixture. It is known that the strength of a cementsoil mixture depends mainly on cement content, water content, and curing period with respect to a certain amount of tobetreated soft soils [1,11,16].
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 postcement 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 postcement interface.
Jun 02, 2017· The results show that the C/S ratio changes in the interface of cement and polymeric fibers and is largely affected by the functional group of the polymers. The results are then used to propose a more realistic molecular dynamics model for CSH in the vicinity of the three most used polymeric fibers: polypropylene, polyvinyl alcohol, and nylon ...
Beck, J, Feng, R, Hall, DM, Buyuksagis, A, ZiomekMoroz, 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. 107122 ...
Too high, and the risk of thermal necrosis 4 and BCIS 5 increase; too low, and the cementbone 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 ...
and structural damage were observed from basalt rock near the interface with cement (Figure ). 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.
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 readytouse tailormade automation solution for mining and cement, ABB Ability™ System ...
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 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 ...
Cementsoil mixture is generally produced in situ by wet/dry soil mixing or jet grouting. Fig. 1a illustrates the phase composition for typical cementsoil is noteworthy that the water content of cementsoil 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 ...
May 18, 2018· Stresses in the cement‐cup interface were generally higher than the stress in the trabecular bone‐cement interface (by %, %, and 11% for the 28, 32, and 36 mm head sizes respectively for the average weight patient and by %, %, and % for the 28, 32, and 36 mm head sizes respectively for the overweight patient) but lower ...
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 .
Saltbond II cement grout plug top displacements were higher than the bottom plug displacements prior to failure. The plugs contracted by up to 2 mm (8% of the plug lengths) at failure. Dissolution of the rock salt along the cement grout/salt interface is a major concern in borehole cement grouting, as well as in borehole sealing.
at the cementbone interface may appear as radiolucent lines and is usually attributed to poor penetration of the cement into the Failure for the cementimplant interface may be due to the poor interfacial strength of the cement to the Definitions • Dough time – the change in physical condition of the cement identified ...
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 .
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 MPa/% in bond strength. • Local nanofiller content in interface is higher than that in bulk cement mortars. •
cement microstructure. High frequency (1 GHz) studies identified reaction zones around bubbles, ettringite formation, and effects of aggregate composition. Lower frequency images (200–400 MHz) have been used to characterize effects of aggregate composition on cement/grain interface. The information obtained from acoustic microscopy complements
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.
The densities inside the bonecement interface at −3 mm are significantly lower for the voidcreating procedures: % ± % for vertebral stenting and % ± % for balloon kyphoplasty compared with % ± % for RF kyphoplasty and % ± % for shield kyphoplasty (P < .0001) . It is noteworthy that no trabecular structures are ...
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.
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