Results 41 to 50 of about 4,946 (135)

Quantitative comparison of a laterally misplaced pedicle screw with a re-directed screw. How much pull-out strength is lost?

Acta Orthopaedica et Traumatologica Turcica, 2018
Objective: Redirecting of a laterally misplaced pedicle screw into the accurate position decreases the pull-out strength due to the reinsertion, lateral wall cortical perforation and widening of the pedicle hole.
Murat Korkmaz, Kerim Sarıyılmaz, Okan Ozkunt, Halil Can Gemalmaz, Turgut Akgül, Mustafa Sungur, Fatih Dikici, Murat Baydoğan   +7 more
doaj   +1 more source

Tensile behavior of FRP anchors made from CFRP ropes epoxy-bonded to uncracked concrete for flexural strengthening of RC columns

Case Studies in Construction Materials, 2020
One of the major problems with using fiber reinforced polymer (FRP) in strengthening reinforced concrete (RC) structures is FRP premature debonding. Anchoring FRP materials to concrete has become associated with most of the strengthening techniques.
Yasir M. Saeed, Wisam A. Aules, Franz N. Rad, Anis M. Raad   +3 more
doaj   +1 more source

A COMPARISON OF PULLOUT STRENGTH OF PEDICULAR SCREWS BETWEEN DIFFERENT METHODS OF SCREW INSERTION IN POSTERIOR FIXATION OF THORACIC SPINE [PDF]

Acta Medica Iranica, 2008
Pedicle screws provide rigid fixation for instabilities in the lumbar and lumbosacral spine. Anatomical consideration and potential risk of neurologic complications are the reasons to hesitate using pedicle screws in the thoracic spine.
P Habib-Allah -Zadeh, B Mirzashahi, M Sadat, B Siavashi, B Mohammad-Hosseini, S Mohammad-Hosseini, A Ziaei-Moayyed   +6 more
doaj   +1 more source

Comparison of the Pullout Strength of Pedicle Screws According to the Thread Design for Various Degrees of Bone Quality

Applied Sciences, 2019
Although dual-threaded pedicle screws have been developed, the advantages over single-threaded screws remain controversial. We aimed to investigate the biomechanical performance of two types of dual-threaded pedicle screw by comparing their pullout ...
Feng Shen, Ho-Joong Kim, Kyoung-Tak Kang, Jin S. Yeom   +3 more
doaj   +1 more source

Evaluating seismic stability of reinforced soil slopes using the limit equilibrium method: influence of geosynthetic strength indicators

Frontiers in Physics
Seismic stability of soil slopes is a critical issue within engineering geology, with a particular emphasis on understanding how geosynthetic strength indicators influence the stability of reinforced slopes.
Xin Chen, Zheng Zhou, Yuming Zhu, Shikun Pu, Dengke Zhang, Erbing Li   +5 more
doaj   +1 more source

The Relationship Between Bone Quality and Biomechanical Strength of All-Suture Anchors Utilized in Rotator Cuff Repairs

Orthopaedic Journal of Sports Medicine
Background: All-suture anchors (ASAs) are increasingly used in arthroscopic rotator cuff repair and rely on cortical bone for strength. No study has compared ASA pullout strength in relation to bone mineral density (BMD) in the different quadrants of the
Andrew D. Posner MD, Dave T. Huang MS, Andrew Nakla MD, Ajith Malige MD, Thay Q. Lee PhD, Orr Limpisvasti MD, Melodie F. Metzger PhD   +6 more
doaj   +1 more source

Experimental Study on the Pullout Strength of Bonded Rebar Under Fire (High Temperature)

工程科学与技术, 2009
:In order to investigate the working behaviors of bonded rebar under fire (high temperature), 25 specimens were designed for the test of pullout strength including those working in the ambient circumstance.Two embedment depths (10 d, 15 d) were ...
doaj  

Biomechanical study of the fixation stability of broken pedicle screws and subsequent strategies.

PLoS ONE, 2019
Pedicles are often broken when screws are inserted into hard pedicles with small diameters or when the diameter of the screw itself is inadequate. However, there is a lack of biomechanical literature that addresses screw loosening as a result of broken ...
Ming-Kai Hsieh, Mu-Yi Liu, Jin-Kai Chen, Tsung-Ting Tsai, Po-Liang Lai, Chi-Chien Niu, Ching-Lung Tai   +6 more
doaj   +1 more source

Experimental study on geogrid-soil interface properties based on pullout tests: A case study

Case Studies in Construction Materials
The geogrid-soil interaction, which is crucial to the safety and stability of reinforced soil structures, is determined by the key variables of both geogrids and soils.
Zhijie Wang, Guowei Zhang, Guangqing Yang, Yan Qin, Shiguang Zhou   +4 more
doaj   +1 more source

Screw Pullout Strength After Pedicle Screw Reposition: A Finite Element Analysis. [PDF]

Spine (Phila Pa 1976), 2023
Ye YX, Huang DG, Hao DJ, Liu JY, Ji JJ, Guo JN.   +5 more
europepmc   +1 more source