Results 31 to 40 of about 55,903 (167)

Lumbar pedicle cortical bone trajectory screw

Chinese Medical Journal, 2014
Objective The purpose of this study was to demonstrate the lumbar pedicle cortical bone trajectory (CBT) screw fixation technique, a new fixation technique for lumbar surgery. Data sources The data analyzed in this review are mainly from articles reported in PubMed published from ...
Tengfei, Song, Wellington K, Hsu, Tianwen, Ye   +2 more
openaire   +2 more sources

Effects of Immediate Orthodontic and Orthopedic Forces on Peri-Miniscrew Bones: Histomorphologic and Histomorphometric Assessment in Dogs

International Journal of Dentistry, 2012
Aim. The aim of this study was histomorphologic and histomorphometric evaluation of peri-screw bone after immediate orthodontic and orthopedic forces and comparing them with a control group. Materials and Methods.
Mansour Rismanchian, Sayed Hamid Raji, Danesh Teimori Rik, Sayed Mohammad Razavi, Navid Khalighinejad, Hossein Goroohi, Hamid Badrian   +6 more
doaj   +1 more source

Lateral migration resistance of screw is essential in evaluating bone screw stability of plate fixation

Scientific Reports, 2021
Conventional evaluation of the stability of bone screws focuses on pullout strength, while neglecting lateral migration resistance. We measured pullout strength and lateral migration resistance of bone screws and determined how these characteristics ...
Xiaoreng Feng, Weichen Qi, Teng Zhang, Christian Fang, Hongfeng Liang, Bin Chen, Frankie Leung   +6 more
doaj   +1 more source

Proposal of a method for evaluating the bone affinity of pedicle screws and considering differences in bone affinity between carbon-fiber-reinforced plastic and titanium alloy pedicle screws

Discover Applied Sciences
Bone affinity for materials is important for success of bone implants, including pedicle screws. Therefore, regarding medical devices using new materials, evaluating the biocompatibility and bone affinity for our recently developed posterior internal ...
Hiroki Ohashi, Kohei Morita, Satoshi Yamana, Kenji Tsuchida, Yasuhiro Furuta, Tomoko Mizushima, Yuki Hishinuma, Shunsuke Katsumi, Akira Shinohara, Satoshi Tani, Yuichi Murayama   +10 more
doaj   +1 more source

A Novel Screw Drive for Allogenic Headless Position Screws for Use in Osteosynthesis—A Finite-Element Analysis

Bioengineering, 2021
Due to their osteoconductive properties, allogenic bone screws made of human cortical bone have advantages regarding rehabilitation compared to other materials such as stainless steel or titanium.
Sebastian Lifka, Werner Baumgartner
doaj   +1 more source

Are continuous locking headless bone screws with locking plate fixation effective for bridging fracture gaps in far cortical locking constructs? An in vitro biomechanical and finite element study under simplified axial loading

Frontiers in Bioengineering and Biotechnology
IntroductionLocking screws typically provide more stable fixation than conventional cortical screws. However, the rigid connection between the locking screw head and plate hole can cause stress concentrations and lead to early failure under cyclic ...
Chen-Chiang Lin, Ya-Han Chan, Po-Feng Su
doaj   +1 more source

Use of Eggshells as Bone Grafts around Commercially Pure Titanium Implant Screws Coated with Nano Calcium Sulfate

International Journal of Biomaterials, 2022
Background. Implant insertion in regions with poor bone quantity, such as the posterior maxilla, is potentially associated with an increased rate of implant failure. Calcium sulfate can be used as the coating material for commercially pure titanium (CpTi)
Dher Riyadh Kadhim, Thekra Ismael Hamad, Abdalbseet A. Fatalla   +2 more
doaj   +1 more source

Does the Miniscrew Length, Insertion Level, and Insertion Force Make a Difference on the Stress and Strain Distribution Across the Alveolar Bone? A Finite Element Study

Journal of Indian Orthodontic Society
Objective The aim of this study was to evaluate, using the finite element method (FEM), the stresses generated on various parts of the mini-screw and on the bone resulting from the insertion of mini-screws of varying lengths and under different forces ...
Anand Marya, Matthew Angelo Mina Eugenio, Adith Venugopal, Narayan Gandedkar, Nasim Mesgarzadeh   +4 more
doaj   +1 more source

Plate osteosynthesis combined with bone cement provides the highest stability for tibial head depression fractures under high loading conditions

Scientific Reports, 2022
Older patients sustaining tibial head depression fractures often cannot follow the post-operative rehabilitation protocols with partial weight-bearing of the affected limb, leading to osteosynthesis failure, cartilage step-off and arthritis development ...
Philipp Heilig, Lars-Christopher Faerber, Mila M. Paul, Eva Kupczyk, Rainer H. Meffert, Martin C. Jordan, Stefanie Hoelscher-Doht   +6 more
doaj   +1 more source

Enhanced bone screw fixation with biodegradable bone cement in osteoporotic bone model

Journal of Applied Biomaterials & Biomechanics, 2012
Purpose The purpose of this study was to study the potential of novel biodegradable PCL bone cement to improve bone screw fixation strength in osteoporotic bone. Methods The biomechanical properties of bone cement (ε-polycaprolactone, PCL) and fixation strength were studied using biomechanical tests and bone screws fixed in an osteoporotic bone model ...
Tiina, Juvonen, Arto, Koistinen, Heikki, Kröger, Reijo, Lappalainen   +3 more
openaire   +2 more sources