Results 161 to 170 of about 11,405 (203)
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[Research on Self-tapping Performance Test of Self-tapping Bone Screws].
Zhongguo yi liao qi xie za zhi = Chinese journal of medical instrumentation, 2022To 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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Simulation of a Screw Self-tapping Process
2019With 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 +3 more
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Pullout Strength of Self-Tapping Screws Inserted to Different Depths
Journal of Orthopaedic Trauma, 2005The 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 +2 more
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Comparison of Compression and Torque Measurements of Self-Tapping and Pretapped Screws
Plastic and Reconstructive Surgery, 1989The 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
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Journal of Oral and Maxillofacial Surgery, 1990
Multiple systems for internal screw fixation are presently in use in oral and maxillofacial surgery. These systems differ in screw diameter, material, and design. This study evaluated the uniaxial pullout strength of five screw systems. Two-millimeter, 2.7-mm, and 3.5-mm screws were initially evaluated for pullout strength.
W L, Foley, D E, Frost, M R, Tucker
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Multiple systems for internal screw fixation are presently in use in oral and maxillofacial surgery. These systems differ in screw diameter, material, and design. This study evaluated the uniaxial pullout strength of five screw systems. Two-millimeter, 2.7-mm, and 3.5-mm screws were initially evaluated for pullout strength.
W L, Foley, D E, Frost, M R, Tucker
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Veterinary Surgery, 2012
ObjectiveTo compare the incidence of radiographically apparent transcortical diaphyseal tibial fractures between self‐tapping screws (STS) and non‐self‐tapping screws (NSTS) in a canine tibial plateau leveling osteotomy (TPLO) model.Study DesignCase series.AnimalsDogs (n = 106) that had TPLO.MethodsNSTS (n = 107), STS titanium (n = 104), or STS ...
Christina, Boekhout, Alan, Cross
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ObjectiveTo compare the incidence of radiographically apparent transcortical diaphyseal tibial fractures between self‐tapping screws (STS) and non‐self‐tapping screws (NSTS) in a canine tibial plateau leveling osteotomy (TPLO) model.Study DesignCase series.AnimalsDogs (n = 106) that had TPLO.MethodsNSTS (n = 107), STS titanium (n = 104), or STS ...
Christina, Boekhout, Alan, Cross
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Theoretical modelling of the self-tapping screw fastening process
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2001The results of a theoretical study of the self-tapping screw insertion process are presented. Fundamental concepts of engineering mechanics are employed to analyse the axial torque required to complete a general self-tapping screw insertion operation.
Seneviratne, L D +3 more
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Joining polymer parts with self-tapping screws: an improvement of the screw thread geometry
International Journal of Material Forming, 2020In the present article, the influence of the self-tapping screw’s geometry during the thread forming processes in polymer types used in several industries was studied and analysed using experimental measurement and the finite element method. A number of parameters, such as assembly, type of materials and geometry, were studied. Several commercial screw
Wilmer E. Cumbicus +3 more
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1999
The invention pertains to a screw produced by cold rolling, designed to be screwed into plastic material, and having a self tapping thread, the fillets (3) of which are formed, in a sectional view, like a knife blade. The fillet flank surface (6, 8) features an inward curve (5) in its central third and forms an outer thread flank angle ( alpha ) of ...
EJOT VERBINDUNGSTECH GMBH & CO +2 more
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The invention pertains to a screw produced by cold rolling, designed to be screwed into plastic material, and having a self tapping thread, the fillets (3) of which are formed, in a sectional view, like a knife blade. The fillet flank surface (6, 8) features an inward curve (5) in its central third and forms an outer thread flank angle ( alpha ) of ...
EJOT VERBINDUNGSTECH GMBH & CO +2 more
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Self-tapping screw fixation of the Austin osteotomy.
The Journal of foot surgery, 1990The authors present an alternative method of fixation for the Austin bunionectomy using the Richards self-tapping screw. A description of the screw and method of application is included. In more than 250 osteotomies fixated by this technique, no complications inherent to the self-tapping screw have been encountered.
M S, Klein +3 more
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