The hand x-rays of group of patients with generalised osteoarthrosis alone were compared with those patients with generalised osteoarthrosis and chondrocalcinosis (CC). An arthropathy seemingly specific for CC could be identified in the metacarpophalangeal (MCP) and carpal joints. In the MCP joints it was characterised by subchondral rarefactions, deviation of the joint axis, joint space narrow...

Sixty Duroc pigs, representing offspring of three lines from the fifth generation of divergent selection for leg weakness, were examined to determine correlated responses in joint angularity. The lines were low, control, and high, with the latter having superior front leg structure. At approximately 100 kg, 10 pigs of each sex and line were scored for front and rear leg structure and movement. ...

Limb skeletal elements are connected by distinct synovial joints, but the mechanisms regulating joint formation, diversity, and organization remain unclear. Previous studies showed that Hox11 mouse mutants have severe developmental defects in radius and ulna and tibia and fibula, but wrist and ankle joint formation and characteristics were not examined in detail. We now find that E11.5 and E12....

AIMS To determine the frontal plane position of the ground reaction force vector at its centre of pressure under the hoof of walking horses, and its projection through the distal limb joints, and to relate this to hoof geometric measurements. METHODS Reflective markers were glued to the forelimb hooves and skin of 26 horses, over palpable landmarks representing centres of the coffin, fetlock ...

OBJECTIVE To present the characteristics and create awareness of symptomatic carpal bossing and discuss potential etiologies and the role of conservative management through the presentation of an athlete with traumatic onset of symptomatic carpal bossing. CLINICAL FEATURES This case report outlines the presentation and conservative management of an elite eighteen year old hockey player with s...

Cadaver forearms were tested to measure carpal bone separation and wrist ligament tension in response to MTS-based incremental wrist distraction. Distraction of 2 mm separated the proximal carpal row from the radius and transmitted an average tension of 8 N. The mid-carpal joint also began to widen at this level of distraction. Distraction of 4 mm resulted in an average tension of 20 N. At this...

anglion cysts are common wrist masses and may cause median neuropathy. The great majority of volar wrist ganglia arise from the radioscaphoid or scaphotrapezial joint, with a smaller percentage originating from the pisotriquetral joint. 1,2 The car-pometacarpal joints are uncommon locations for ganglia, especially for cysts causing median nerve compression. A literature review of ganglia within...

osteoid osteoma is a benign bone tumor that rarely involves joints. although there are several reports of arthroscopic osteoid osteoma excisions, to our knowledge, there are no reports of this type of treatment for osteoid osteoma in carpal bones. we report two cases of arthroscopic (a person who had a pain in the left wrist and the other one with carpal tunnel syndrome) with excision of osteoi...

Change in carpal arch width (CAW) is associated with wrist movement, carpal tunnel release, or therapeutic tunnel manipulation. This study investigated the angular rotations of the distal carpal joints as the CAW was adjusted. The CAW was narrowed and widened by 2 and 4 mm in seven cadaveric specimens while the bone positions were tracked by a marker-based motion capture system. The joints main...

dislocations are common wrist injuries. Perilunate injuries, as described by Mayfield,1 are most common and perhaps best understood. Disruption of the carpal ligaments or fractures of the carpal bones can occur in almost any combination. The injury occurs as a result of extreme hyperextension, ulnar deviation, and internal carpal supination. As the deforming force increases, the ligaments and b...