Results 31 to 40 of about 4,946 (135)

Pullout strengths of orthodontic palatal mini-implants tested in vitro

open access: yesJournal of Dental Sciences, 2011
Background/purpose: New modified mini-implants are used in orthodontic practice to reinforce palatal anchorage. The aim of this study was to evaluate the anchorage strengths of palatal mini-implants in terms of their vertical and horizontal pullout ...
Ju-Hui Wu   +6 more
doaj   +1 more source

Biomechanical comparison of pedicle screw fixation strength in synthetic bones: Effects of screw shape, core/thread profile and cement augmentation.

open access: yesPLoS ONE, 2020
Pedicle screw loosening resulting from insufficient bone-screw interfacial holding power is not uncommon. The screw shape and thread profile are considered important factors of the screw fixation strength. This work investigated the difference in pullout
Mu-Yi Liu   +5 more
doaj   +1 more source

A Mohr-Coulomb-Vilar model for constitutive relationship in root-soil interface under changing suction

open access: yesSoils and Foundations, 2021
Understanding mechanical interactions at the root-soil interface is essential to predict the erosion of vegetated slopes. Recently, the shear strength of vegetatedil under changing hydraulic conditions has been measured and modeled; however, root-soil ...
Haruka Tomobe   +2 more
doaj   +1 more source

Experimental and FDM Study on Geogrid-Soil Interaction by Reformed Direct Shear Test Apparatus [PDF]

open access: yesJournal of Rehabilitation in Civil Engineering, 2019
This paper presents the effect of geogrid tensile strength by computing the pullout resistance and the geogrid-soil interaction mechanism. In order to inquire this interface, a series of pullout tests have been conducted by a large scale reformed direct ...
Ali Namaei   +2 more
doaj   +1 more source

Experimental Investigation into Pull-Out Strength of Foamed Concrete Using Different Types of Screw

open access: yesMATEC Web of Conferences, 2014
This study focuses on the results of the comprehensive strength test to quantify the mechanical properties of the screw’s pullout strength on foamed concrete.
Othuman Mydin M.A.   +4 more
doaj   +1 more source

Experimental study on the pullout characteristics of toothed warp knitted geogrid in different sand fillers

open access: yesFrontiers in Materials, 2023
In order to investigate the pullout characteristics of a toothed geogrid, a commercialized warp-knitted geogrid was combined with rigid angle aluminum to form a qualified toothed geogrid and used to perform pullout model tests in which four different ...
Fu Yawei, Fang Wei
doaj   +1 more source

Biomechanical Comparison of Salvage Pedicle Screw Augmentations Using Different Biomaterials

open access: yesApplied Sciences, 2022
Allograft bone particles, hydroxyapatite/β-hydroxyapatite-tricalcium phosphate (HA/β-TCP), calcium sulfate (CS), and polymethylmethacrylate (PMMA) bone cement are biomaterials clinically used to fill defective pedicles for pedicle screw augmentation. Few
Yun-Da Li   +6 more
doaj   +1 more source

Strength Performance of the Connection between Brick and SPF Lumber

open access: yesBuildings, 2022
There are many ways to strengthen an unreinforced brick masonry wall. One of the strengthening methods applies timber, which is a lightweight and easy installation. The connection between the timber and the brick masonry wall plays an important role.
Ariunaa Ganbaatar   +3 more
doaj   +1 more source

Determination of Pullout Strength of Geogrid in Sandy Soil

open access: yesInternational Journal of Engineering and Advanced Technology, 2020
Geogrid reinforcement of soil has been successfully used for many years in a wide variety of applications. This paper presents data obtained from a series of laboratory tests performed on the geogrid. The tests were conducted to determine the mechanical property including the tensile strength of the geogrid and its corresponding pullout test.
Tushita Naidu K   +3 more
openaire   +2 more sources

Craniocaudal cyclic load improves risk assessment of lumbar pedicle screw loosening: finite element analysis based on computer tomography

open access: yesFrontiers in Bioengineering and Biotechnology
BackgroundPedicle screw loosening (PSL) is a frequent complication in osteoporotic patients undergoing spinal fixation, yet effective risk assessment methods are limited.
Chenyu Jiang   +8 more
doaj   +1 more source

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