Relationship between clamp force and pull-out strength in lag screw timber joints
نویسندگان
چکیده
منابع مشابه
Triangulated pedicle screw construct technique and pull-out strength of conical and cylindrical screws.
To compare the mechanical effectiveness of a new conical screw design with a conventional cylindrical screw design, the screw insertion time, torque, and pull-out strength of single-pedicle screw and triangulated-pedicle screw constructs of each type of screw were compared in human cadaveric vertebral bodies. The time required to insert the conical screws was less than that required for cylindr...
متن کاملThe effect of lateral wall perforation on screw pull-out strength: a cadaveric study
BACKGROUND Lateral pedicle wall perforations occur frequently during pedicle screw insertion. Although it is known that such an occurrence decreases the screw pull-out strength, the effect has not been quantified biomechanically. MATERIALS AND METHODS Twenty fresh cadaveric lumbar vertebrae were harvested, and the bone mineral density (BMD) of each was evaluated with dual-energy radiography a...
متن کاملA combined partially threaded cancellous lag screw for achieving maximum compressive force without compromising pullout strength.
OBJECTIVE The partially threaded cancellous lag screw (PTLS) could not provide maximum compressive force (C(MAX)) for compression due to compromised pullout strength (POS). The combined partially threaded cancellous lag screw (CPTLS) could provide higher C(MAX) than PTLS. However, the change of POS at the point of C(MAX) when using CPTLS for compression has never been explored. The aim of this ...
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We discuss theoretically the force F between two colloidal particles, each of them carrying one single strand DNA. The two strands are complementary only on a finite sequence of (`) consecutive base pairs. We define an adjustment length κ−1 (a few base pairs): in the adjustment regions near both ends of the paired region, the tension is still mainly on one single strand. But in the central part...
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چکیده شخصیت به مجموعه عوامل روانی، عقلی، احساسی، و فیزیکی تشکیل دهنده یک فرد اطلاق میشود، خصوصا فرد ازدیدگاه دیگران ( مرجع). تدابیر یاد گیری سعی در اگاهی از اقدامات زبان اموزان موفق زبان دوم یا یک زبان بیگانه را دارد که توسط خود زبان اموزان گزارش میشود،یا حین یادگیری زبان دوم یا زبان بیگانه از انها قابل مشاهده است( روبین و وندن 1987). همچنین تدابیر ارتباطی به زبان اموزان کمک می کند تا بر مشکلا...
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ژورنال
عنوان ژورنال: Journal of Wood Science
سال: 2017
ISSN: 1435-0211,1611-4663
DOI: 10.1007/s10086-017-1660-1