lag screw


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lag screw
hexagonal head lag screw

lag screw

n.
A heavy screw used for wood and having a usually hexagonal or square head.

[From lag (from its original use in securing barrel staves).]

lag screw

n
(Building) a woodscrew with a square head
[from lag3; the screw was originally used to fasten barrel staves]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.lag screw - a heavy woodscrew with a square or hexagonal head that is driven in with a wrenchlag screw - a heavy woodscrew with a square or hexagonal head that is driven in with a wrench
woodscrew - a metal screw that tapers to a point so that it can be driven into wood with a screwdriver
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References in periodicals archive ?
Since I didn't have a big enough nail handy for this one, I used an old lag screw. Just keep in mind you don't need or even want an extremely hard bolt.
In the treatment of TFs with proximal nailing, the most frequent complications are varus collapse of the proximal femur, cut-out of the lag screw, shortening of the femur, nonunion, secondary fracture of the femur or greater trochanter, thigh pain, screw fracture, and Z-effect or reverse Z-effect of nails with two lag screws (20,21).
Advantages of the DCS plate include the relative technical ease of the procedure, as well as the ability to compress the nonunion site through the large proximal lag screw. Furthermore, at the author's institution, this plate is bent according to preoperative plans, allowing for improved contact throughout the lateral cortex after osteotomy completion [38].
However, poor fixation and loss of reduction may occur as a result of unsatisfactory control of the proximal fragment during insertion of the lag screw [16].
The Gamma nail is susceptible to fail at its weakest point, the lag screw implant interfaced [14,15,16,17,18]
The ideal position of the proximal lag screw (PLS) within the femoral head to provide optimal stability to the implant-bone structure has not been studied sufficiently for cephalomedullary nails (9-11).
The students were introduced to the concept of Interfragmentary lag screw fixation by Prof Zaki Idrees.
The TRIGEN INTERTAN Intertrochanteric Antegrade nail (Smith & Nephew, Memphis, TN) was introduced in 2005 and increases intertrochanteric rotational stability [3] and decreases lag screw cutout [4, 5].
Lag screw osteosynthesis a new procedure for treating fractures of the man-dibular angle.
Exclusion Criteria: Criteria for exclusion included intracapsular femoral neck fractures; intertrochanteric fractures in which the head-neck fragment has connection with the trochanter(s), or has inferior cortical extension which can tether it to a distal fragment and prevent its spinning around the lag screw; and patients with advanced arthritis or with a pathological fracture.
(3,4) In the majority of described cases of hip fracture related vascular complication, the injured vessel is either a branch of the profunda femoris artery due to penetration by a drill bit or screw, or an intra-pelvic vessel damaged by over-penetration of the lag screw guidewire.
The lag screw or blade with a length of 100 mm, a long barrel 135[degrees] side plate, and four conventional bicortical screws were inserted as a complete set of fixation.