Results 181 to 190 of about 4,576,853 (213)

Geometric Generalization of Self Tapping Screw Insertion Model

2021 43rd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), 2021
Bone screws are used in orthopaedic procedures to fix implants and stabilise fractures. These procedures require care, as improperly torquing the screws can lead to implant failure or tissue damage, potentially requiring revision surgery or causing further disability.
Jack Wilkie 0001, Paul Docherty 0001, Thomas Stieglitz, Knut Möller   +3 more
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AO/ASIF self-tapping screws (STS)

Injury, 1993
The term self-tapping screw refers to screws which are inserted into a predrilled hole directly without first tapping a thread. A self-drilling screw would refer to a screw inserted without predrilling which would function similar to a threaded K-wire. Selftapping screws are further subdivided into threadfarming and thread-cutting screws.
F W, Baumgart, J, Cordey, K, Morikawa, S M, Perren, B A, Rahn, R, Schavan, S, Snyder   +6 more
openaire   +2 more sources

Self-Drilling and Self-Tapping Screws

Journal of Craniofacial Surgery, 2010
The aim of the current study was to compare self-drilling and self-tapping screws with regard to bone contact and the production of bone debris using scanning electron microscopy.Three New Zealand rabbit calvariae were used. Self-tapping and self-drilling screws were inserted into the outer surface of the skull with and without saline solution ...
Juliana Gonçalves, Goelzer, Rafael Linard, Avelar, Rogério Belle, de Oliveira, Roberto, Hubler, Roger Lanes, Silveira, Rosilene Andrea, Machado   +5 more
openaire   +2 more sources

In vitro Evaluation of the Loosening Characteristics of Self-Tapped and Non-Self-Tapped Cortical Bone Screws

Clinical Orthopaedics and Related Research, 1981
The heads of self-tapping and non-self-tapping screws in dog femurs were exposed to a cyclic shearing force of 110 N for 200 loading cycles. This cyclic shear loading created a decrease in pull-out strength for both screw types of approximately 11% (p less than 0.01).
C T, Vangsness, D R, Carter, V H, Frankel   +2 more
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Analysis of the osseous/metal interface of drill free screws and self-tapping screws

Journal of Cranio-Maxillofacial Surgery, 2001
Aim: A comparison of metal/osseous interface and bone remodelling after insertion of different types of titanium bone screws in vivo. Material: Samples of five of each of the following bone screw types were inserted into the anterior wall of the frontal sinus of five Göttingen minipigs: self-tapping micro- (1.5 mm) and miniscrews (2.0 mm) or drill free
W, Heidemann, H, Terheyden, K L, Gerlach
openaire   +3 more sources

Simulation of a Screw Self-tapping Process

2019
With the ever-increasing demand to use lightweight materials in the automotive industry, automakers are keen on using plastics across their products. Plastics are predominantly held together using adhesives, screws, or snaps. Screws are promising when axial reinforcement between the components is desired. Self-tapping screws are now the preferred type,
Kushagr Goyal, Sivaraman Rajan, Harish Krishnamurthy, Ravindra Venkataramu   +3 more
openaire   +1 more source

[Research on Self-tapping Performance Test of Self-tapping Bone Screws].

Zhongguo yi liao qi xie za zhi = Chinese journal of medical instrumentation, 2022
To study the self-tapping performance test method of self-tapping bone screws based on the YY/T 1505 standard.With reference to the method of YY/T 1505, various factors affecting the self-tapping force test was optimised, and the self-tapping force judgment method was improved.The experimental results showed that the self-tapping force obtained by the ...
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Self-tapping Screws as Reinforcement for Structural Timber Elements

2021
The use of self-tapping screws is a state-of-the-art practice in fastener and reinforcement technologies for timber structures. The high axial stiffness and load-carrying capacity of self-tapping screws, together with their easy handling, make them one of the most economical choices for applications in both fastener and reinforcement domains.
Dietsch, Philipp, Ringhofer, Andreas
openaire   +2 more sources

Pullout Strength of Self-Tapping Screws Inserted to Different Depths

Journal of Orthopaedic Trauma, 2005
The purpose of this study was to determine whether the depth of insertion through the far cortex of self-tapping screws significantly affects pullout strength.Fifty, Synthes, 3.5-mm, self-tapping screws were inserted into synthetic bone blocks and divided into 5 groups. Group 1 had screws with their tips inserted 1 mm short of the far cortex.
Robert, Berkowitz, Glen, Njus, Gregory, Vrabec   +2 more
openaire   +2 more sources

Comparison of Compression and Torque Measurements of Self-Tapping and Pretapped Screws

Plastic and Reconstructive Surgery, 1989
The choice of an internal fixation system for maxillofacial surgery is made difficult because of lack of information with respect to functional load. This study attempted to clarify some of the controversy with respect to maxillofacial use of these implants. Maximal compressive force to torque values were measured in standardized bone thicknesses of 1,
J H, Phillips, B A, Rahn
openaire   +2 more sources