BACKGROUND Isolated radial head dislocation is a rare injury with an unclear pathomechanism, and the treatment is controversial. The purpose of the present study was to investigate the biomechanical contributions of the annular ligament, quadrate ligament, interosseous membrane, and annular ligament reconstructions to proximal radioulnar joint stability. METHODS Five fresh frozen cadaveric up...

BACKGROUND Knee laxity measurements have been shown to be associated with some medical conditions such as chronic joint pain and collagen tissue diseases. The aim of this study was to determine the effects of demographic factors and anthropometric measures on knee laxity. MATERIALS AND METHODS Data were collected from 521 visitors, staffs and students from the University Malaya Medical Centre...

CONTEXT Lateral ankle sprains can manifest into chronic mechanical joint laxity when not treated effectively. Joint laxity is often measured through the use of manual stress tests, stress radiography, and instrumented ankle arthrometers. PURPOSE To systematically review the literature to establish the influence of chronic ankle instability (CAI) on sagittal and frontal plane mechanical joint ...

OBJECTIVE Although it is a cause of osteoarthritis (OA) in animal models, laxity in human knee OA has been minimally evaluated. Ligaments become more compliant with age; whether this results in clinical laxity is not clear. In theory, laxity may predispose to OA and/or result from OA. Our goals were to examine the correlation of age and sex with knee laxity in control subjects without OA, compa...

Unlike anterior cruciate ligament (ACL) injury, disability from isolated posterior cruciate ligament (PCL) injury varies from no interference with life style to severe impairment of daily activities. Therefore, management of isolated PCL injuries remains controversial. High-energy vehicular accidents often cause more-serious PCL injuries, while less-severe injuries result from low-energy trauma...

The increase in the number of available internal fixation devices for the cervical spine has promoted innovative stabilization of traumatic instability of the craniocervical junction. Traumatic injuries involving the craniocervical junction vary widely because of the complex osseous and ligamentous anatomy. These injuries can be purely ligamentous, such as occipitocervical dislocation, or can i...

Laxity testing is an important part of the examination of any joint. In the shoulder, it presents unique challenges because of the complexity of the interactions of the glenohumeral and scapulothoracic joints. Many practitioners believe that laxity testing of the shoulder is difficult, and they are unclear about its role in evaluation of patients. The objectives of the various laxity and instab...

BACKGROUND An increase in knee laxity during the menstrual cycle may increase the risk of anterior cruciate ligament injury. OBJECTIVE To investigate whether changing knee laxity during the menstrual cycle correlates with changing knee joint loads in a cutting manoeuvre. DESIGN Cross-sectional study. SETTING Laboratory testing. PARTICIPANTS 25 healthy women, with a normal menstrual cycl...

Skin laxity is an unavoidable consequence of aging and chronic sun exposure. Patients are increasingly turning to non-surgical skin tightening measures for a more youthful look. Non-surgical methods can be effective in treating mild moderate laxity, while offering decreased downtimes fewer serious complications than surgical interventions. This article reviews the major interventions laxity: ab...

We study the effect of laxity, or slack time, on the online scheduling of broadcasts with deadlines. The laxity of a request is defined to be the ratio between its span (difference between release time and deadline) and its processing time. All requests have a minimum guaranteed laxity. We give different algorithms and lower bounds on the competitive ratio for different ranges of values of laxi...