cancellous screw

cancellous screw

Orthopedics A screw with relatively coarser thread and often with a smooth, unthreaded portion, which allows it to act as a lag screw and to anchor in soft medullary bone. See Screw.
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Tenders are invited for 4.0Mm Cancellous Screw: Imported Make, Intended For Definitive Fixation Of Fractures, Made Of High Tensile Strength Medical Grade Stainless Steel, Fully Threaded,4.0Mm Diameter, Length 10-35Mm Interchangeable,Exact Proportion Of Various Lengths To Be Supplied Must Be Verified From Matron Ot After The Issue Of Po,
* Those fractures treated by closed reduction and percutaneous pin fixation, osteosutures and cancellous screw fixation.
The Olecranon osteotomy was then reduced under direct vision and fixed by figure-of-eight tension band wiring or 6.5 cancellous screw. After fixation of the osteotomy, the elbow was again put through the range of motion to test the stability of fixation.
Nowadays it includes use of tubular external fixator in combination with k wire and cancellous screw fixation and bone grafting1.
Percutaneous cancellous screw fixation was done in 8 cases, cancellous screw and bone grafting in 2 cases, ORIF with buttress plate and screws in 15 cases, ORIF with buttress plate and bone graft in 6 cases and ORIF with buttress plate and external fixator in one patient.
The SEH is designed according to the physiologic micro-movement feature of the syndesmosis, including resilient serpentine linker, fork-like pickpocket across the fibula end, and single cancellous screw hole of the distal tibial end, which can not only effectively fix the distal injured tibiofibular syndesmosis, but also retain the micro-movable feature of it.
(1) Surgeries included coracoclavicular fixation with a cancellous screw or transfixation of the AC joint with Steinmann pins or Kirschner wires.
In the intermediate-sized fragments, a hole for a 4.0-mm partially threaded cancellous screw or malleolar screw is prepared by using one wire and 2.0-or 2.5-mm drill bit [Figures 4-6].
At present the cannulated screw the cancellous screw and cortical screw could all be chosen for the fixation of sustentaculum tali.
In view of the small size of the fragment, it was stabilised with one partially threaded cancellous screw. As the ankle remained unstable on stressing the syndesmosis, a syndesmosis screw was inserted from the fibula engaging the tibia.
The controversial factors in cancellous screw fixation are: method of reduction-open or closed; number of screws used --two, three or four; the configuration of screws -parallel or non-parallel, vertical or triangular fashion; the positioning of screws in the head-centre of head or in the periphery and the addition of bone grafting-free fibula or quadratus femoris muscle pedicle grafting.
The free suture ends were then passed through the tibial tunnel and tied over a 4.5 mm partially threaded bicortical cancellous screw, with a washer on the anteromedial aspect of the tibia (Fig.