Screw positioning and lag screw
cut-out reasons are discussed in many studies.
[6,16] Nevertheless, the lag screw
has potential to rotate the rotationally unstable femoral head during its insertion [14,25], a factor that may increase the incidence of aseptic necrosis and nonunion .
Sunderamoorthy, "Anterior or posterior obliquity of the lag screw
in the lateral view-Does it affect the sliding characteristics on unstable trochanteric fractures?" Injury, vol.
The second method of bone healing is direct bone healing, and is facilitated in an environment of absolute stability provided by lag screws
and compression plating.
In order to ensure failure would occur in the bolt or lag screw
, oversized fasteners were used to attach the joist hangers.
* Lag Screws
. The lag screw
is a large-diameter long screw used for anchoring structural members.
The wooden mailbox pictured at right, purchased at a Bay Area nursery, is mounted atop a 6-foot-tall 4-by-4 redwood post and secured with a 3-inch-long lag screw
. Tucked in a perennial bed within easy reach of a path, it keeps tools close by when spent blooms need clipping.
fixation has been advocated when the tuberosity fragment is large enough to allow the placement of at least two screws .
A 5-hole barrel plate fixed to lag screw
and fixed to shaft of femur using cortical screws in 2nd and 5th hole of plate.
The major development is the unique design and thread spacing of the lag screw
which provides better resistance to cutout.
The system provides for lag screw
fixation for comminuted patterns, non-locking screws to obtain compression across simple patterns and locking fixation in osteopenic bone and multi-fragmentary fracture patterns.
After reduction and fixation of the talus with cancellous lag screws
was achieved, the medial malleolus fracture was fixed with a combination of a distal lag screw
followed by the application of the anti-glide plate situated over the apex of the fracture.