کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3242761 1206127 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Relationship between locking-bolt torque and load pre-tension in the Ilizarov frame
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی طب اورژانس
پیش نمایش صفحه اول مقاله
Relationship between locking-bolt torque and load pre-tension in the Ilizarov frame
چکیده انگلیسی

SummaryThe wire–bolt interface in an Ilizarov frame has been mechanically tested. The optimal torque to be applied to the frame locking-bolts during physiological loading has been defined. The set-up configuration was as is used clinically except a copper tube was used to simulate bone. The force–displacement curves of the Ilizarov wires are not altered by locking-bolt torque. The force in the bone model at which pre-tension is lost increases as the locking-bolts are tightened to 14 Nm torque, but decreases if torque exceeds 14 Nm. Thus, 14 Nm is the optimal locking-bolt torque in frame. The relationship between pre-tension versus load for different locking-bolt torques arises because at low and high clamping torques poor wire holding and plastic deformation respectively occur. Wire damage was seen under light and electron microscopy. Clinically, over or under-tightening locking-bolts will cause loss of pre-tension, reduction in frame stiffness and excessive movement at the fracture site, which may be associated with delayed union.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Injury - Volume 37, Issue 10, October 2006, Pages 941–945
نویسندگان
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