(v. t.) To chamfer or form a depression around the top of (a hole in wood, metal, etc.) for the reception of the head of a screw or bolt below the surface, either wholly or in part; as, to countersink a hole for a screw.
(v. t.) To cause to sink even with or below the surface; as, to countersink a screw or bolt into woodwork.
(n.) An enlargement of the upper part of a hole, forming a cavity or depression for receiving the head of a screw or bolt.
(n.) A drill or cutting tool for countersinking holes.
Example Sentences:
(1) Countersinking implants in extraction sites was critical; labial bone implant defects should be grafted with particulate HA.
(2) Screws will give a firm hold though you’ll need to pre-drill a hole with the 2mm drill bit and countersink the hole for a flush finish.
(3) With countersinking 55% of the 2.7 mm and 27% of the 2.0 mm screws had no threads engaged in the buccal cortical plate.
(4) Conical countersink showed plastic deformations of an average of 1300 N whereas with spherical countersink they did not occur at the same load.
(5) In case of bone cysts and thin corticalis they should provide further support against countersinking.
(6) The percussive patterning of the words serves to reinforce their meaning and to countersink them within the memory.
(7) After reaching the load of 2000 N and keeping the deformation constant we saw a significantly stronger reduction of force with the conical countersink then with the spherical type.
(8) You will need : Talc or chalk Drill 2mm and countersink wood bits 4mm x 50mm countersunk slothead screws Screwdriver Floorboard brads Hammer Punch 1) First lift any coverings there may be on top (carpets, vinyl etc).
(9) In vitro examinations on deformation and relaxation were carried out on cortical countersink of different geometry under a compression load of up to 2000 N through a screw head.
(10) As far as fracture fixation is concerned a smaller postoperative reduction of screw force can be expected if applying a cortical screw with a spherical head in a spherical countersink.
Screw
Definition:
(n.) A cylinder, or a cylindrical perforation, having a continuous rib, called the thread, winding round it spirally at a constant inclination, so as to leave a continuous spiral groove between one turn and the next, -- used chiefly for producing, when revolved, motion or pressure in the direction of its axis, by the sliding of the threads of the cylinder in the grooves between the threads of the perforation adapted to it, the former being distinguished as the external, or male screw, or, more usually the screw; the latter as the internal, or female screw, or, more usually, the nut.
(n.) Specifically, a kind of nail with a spiral thread and a head with a nick to receive the end of the screw-driver. Screws are much used to hold together pieces of wood or to fasten something; -- called also wood screws, and screw nails. See also Screw bolt, below.
(n.) Anything shaped or acting like a screw; esp., a form of wheel for propelling steam vessels. It is placed at the stern, and furnished with blades having helicoidal surfaces to act against the water in the manner of a screw. See Screw propeller, below.
(n.) A steam vesel propelled by a screw instead of wheels; a screw steamer; a propeller.
(n.) An extortioner; a sharp bargainer; a skinflint; a niggard.
(n.) An instructor who examines with great or unnecessary severity; also, a searching or strict examination of a student by an instructor.
(n.) A small packet of tobacco.
(n.) An unsound or worn-out horse, useful as a hack, and commonly of good appearance.
(n.) A straight line in space with which a definite linear magnitude termed the pitch is associated (cf. 5th Pitch, 10 (b)). It is used to express the displacement of a rigid body, which may always be made to consist of a rotation about an axis combined with a translation parallel to that axis.
(n.) An amphipod crustacean; as, the skeleton screw (Caprella). See Sand screw, under Sand.
(v. t.) To turn, as a screw; to apply a screw to; to press, fasten, or make firm, by means of a screw or screws; as, to screw a lock on a door; to screw a press.
(v. t.) To force; to squeeze; to press, as by screws.
(v. t.) Hence: To practice extortion upon; to oppress by unreasonable or extortionate exactions.
(v. t.) To twist; to distort; as, to screw his visage.
(v. t.) To examine rigidly, as a student; to subject to a severe examination.
(v. i.) To use violent mans in making exactions; to be oppressive or exacting.
(v. i.) To turn one's self uneasily with a twisting motion; as, he screws about in his chair.
Example Sentences:
(1) Total excision and immediate reconstruction were done with alloplastic material fixated with microplates and screws.
(2) Two hundred and forty root canals of extracted single-rooted teeth were prepared to the same dimension, and Dentatus posts of equal size were cemented without screwing them into the dentine.
(3) The committee's findings include that the attacks were not extensively planned by the perpetrators; the intelligence community did a good job of warning about the risk of an attack but a bad job of summarizing the attack when it happened; the state department screwed up by not beefing up security at the mission; nobody blocked any military response; and that the Obama administration was slow to produce a paper trail but was generally not a sinister actor in the episode.
(4) The pedicle screw systems were always the most rigid.
(5) Closure is accomplished by suture of soft tissues and reattachment of the posterior trochanteric fragment with bone screws.
(6) Two of the 7 sets of iliosacral screws failed postoperatively (28%).
(7) An algorithm is implemented to determine the form and phase shift for inconsistent type II quadrupoles for any space group having glide or screw-axis translations which are not a consequence of lattice centering.
(8) It constitutes an alternative to Ender nailing, screw-plate, and nail-plate.
(9) Changes in radiostrontium clearance (SrC) and bone formation (tetracycline labeling) were observed in the femurs of skeletally mature dogs following the various operative steps involved in bone screw fixation.
(10) Several conventional internal fixation techniques and a three converging screw method were used.
(11) The criteria of failure of pedicular instrumentation or "death" of an implant were defined as 1) screw bending, 2) screw breakage, 3) infection, 4) loosening of implants, 5) any rod or plate hardware problems, or 6) removal of hardware due to a neurologic complication.
(12) Cadaver studies have been carried out and transpedicular screw position has been confirmed by computed tomography scan.
(13) In this study, we performed a series of in vitro tests to compare the breaking strength of plated bone analogues that used either unicortical or bicortical end screws.
(14) Successful treatment of scaphoid nonunions with screw fixation and cast-free after-treatment does not depend on the implant used but rather on careful case selection and precise surgical technique.
(15) The Herbert bone screw was initially developed for management of fractures of the carpal scaphoid.
(16) Plus, unlike planet-screwing fossil fuels, solar could actually be subsidy-free in a few years.
(17) The intensity-measuring device in both apparatuses has a mobile disk attached to a motionless axis by a spiral spring; the clamps have fixing screws in the butts of a spong.
(18) A variety of quality tests, of biomechanical screws, are used, before performing the operations, that flaws may be detected.
(19) Most fractures were fixed with interfragmentary screws and external fixators.
(20) To give variations in the peak flow-rate (from pulsatile to intermediate to non-pulsatile), three types of blood pump (piston-bellows, screw, and centrifugal) were applied to dogs.