(n.) The quality or condition of being unstable; want of stability, firmness, or steadiness; liability to give way or to fail; insecurity; precariousness; as, the instability of a building.
(n.) Lack of determination of fixedness; inconstancy; fickleness; mutability; changeableness; as, instability of character, temper, custom, etc.
Example Sentences:
(1) (4) Despite the removal of the cruciate ligaments and capsulo-ligamentous slide, no significant residual instability was found in either plane.
(2) By measurement and analysis of the changes in carpal angles and joint spaces, carpal instability was discovered in 41 fractures, an incidence of 30.6%.
(3) Unrecognized flexion injuries of the cervical spine may lead to late instability and neurologic damage.
(4) Hypermobility and instability following injury and degenerative joint disease is poorly understood and often not recognized as the cause of the patients symptoms.
(5) In these three patients, laxity of the knee in flexion was so severe that posterior instability could not be corrected merely by patellar relocation.
(6) Cubitus valgus or instability due to a pseudarthrosis of the lateral epicondyle or to ligamentous injury may stretch the nerve.
(7) The hypothesis that this instability would lead to more errors and longer decision times for distinguishing left-right mirror-image figures was not supported.
(8) 93 knees in 74 patients between 9 and 20 years of age were operated because of patello-femoral instability.
(9) Whereas in flexion stress all methods showed a sufficient stability, the rotation tests proved, that in case of a dorsal instability of the lower cervical spine, posterior interlaminar wiring or anterior plate stabilization showed no reliable stabilization effect.
(10) There is a paucity of informative data on the potentially important role of specific sites of chromosomal instability in oncogenic processes.
(11) "In-gel renaturation" analysis did not show any DNA amplification of high degree in AT22IJE-T. Cytogenetic analysis showed considerable chromosomal instability in the new cell line, and medium conditioned by these cells contained the clastogenic activity which is characteristic of the parental strain as well.
(12) Instability or a return to violence could follow the imposition of measures that would threaten the ability of the PA to govern in the West Bank.
(13) This approach was used in 42 shoulders with rotator cuff tears or posterior instability without complications of infection, failure of deltoid healing, or compromise of suprascapular or axillary nerves.
(14) Sixteen patients who remained wet had detrusor instability; 9 of these were cured by anticholinergic medications.
(15) Atlantoaxial instability, defined as a gap of over 4 mm, was present in seven (10%) children and two (2%) adults.
(16) With these scores we expect to facilitate the diagnostic screening, to indicate the way of therapy and to avoid unnecessary surgery for urinary incontinence in cases of motor-urge-incontinence (detrusor instability, unstable bladder), as long as a urodynamic examination is not feasible on every incontinent women.
(17) Midcarpal instability occurs at the triquetral-hamate joint and is characterized by a dynamic subluxation of the joint.
(18) Structural instability of pZG1 could therefore be due at least in part to the presence of single-stranded DNA.
(19) Oxidative stress is now shown to occur in BS cells and may be responsible for the observed chromosomal instability.
(20) It is therefore unlikely that the tyrosinylation status directly affects the intrinsic stability of assembled microtubules since the rate of length redistribution is both a sensitive assay and a function of the kinetic parameters governing dynamic instability.
Subluxation
Definition:
(n.) An incomplete or partial dislocation.
Example Sentences:
(1) We performed a combined one-stage approach for the treatment of eighteen spastic subluxated or dislocated hips in eleven children who had cerebral palsy.
(2) Patellar subluxation may improve substantially following either lateral release or anteromedial tibial tubercle transfer, but this study suggests that correction of subluxation is less consistent than reduction of abnormal tilt with tibial tubercle transfer or lateral release alone.
(3) Failure was more likely with a subluxated, tilted, or excessively thick patella or flexed femoral component.
(4) Midcarpal instability occurs at the triquetral-hamate joint and is characterized by a dynamic subluxation of the joint.
(5) Volar subluxation of the tendons of the first dorsal compartment of the wrist occurred in two patients after surgery for treatment of de Quervain's stenosing tenosynovitis.
(6) We also examined the effect of an external restraining force on tibial subluxation in the ACL deficient knee.
(7) If not enough styloid is excised, osteophytic overgrowth will occur; if too much is excised, the carpus will sublux radially.
(8) A higher incidence of lens subluxation, lens repositioning, corneal edema, and elevated intraocular pressure was observed in the eyes receiving STAAR silicone implants than in the eyes receiving IOLAB PMMA implants.
(9) A radiographic diagnosis of subluxation was made in five dogs.
(10) In thirty patients with subluxation of the patella, the lines were parallel in twenty-four and formed an angle open medially in six.
(11) The combination of triradiate epiphyseal closure and abductor muscle weakness secondary to superior gluteal nerve damage contributed to subsequent femoral head subluxation.
(12) The most common radiological abnormality was anterior subluxation of C1.
(13) Subluxation and luxation of the ulnar nerve are normally congenital and can result in not only an irritation of the nerve but also sensory loss and motor weakness.
(14) Five cases of subluxation and six of secondary displacement of the tubercles were noted.
(15) These external rotational deformities are due to two unrecognized and untreated combined deformities within the hindfoot and mid-foot: hindfoot varus and talo-navicular subluxation.
(16) The cause for this condition, we think, is laxity of the ulnar part of the lateral collateral ligament, which allows a transient rotatory subluxation of the ulnohumeral joint and a secondary dislocation of the radiohumeral joint.
(17) Only twelve (16 per cent) of the seventy-four shoulders (sixty-eight patients) that had traumatic subluxation had a good or excellent result from the exercises, compared with fifty-three (80 per cent) of the sixty-six shoulders that had atraumatic subluxation.
(18) Fracture-subluxation of the distal interphalangeal joint, avulsion fractures of the extensor tendon, and distal phalangeal epiphyseal injuries are excluded to regidly control the data interpretation.
(19) All calcaneal fractures with no Tc fractures had a plantar proximal intertarsal subluxation.
(20) When subluxation is suspected, an examination under anesthesia and orthroscopy are the most helpful next step.