The range of motion (ROM) of flexion and extension of the radiocarpal joint
was measured using a digital Saunders inclinometer.
(1) In an ulnar neutral wrist, approximately 80% of the axial load is transmitted through the radiocarpal joint
. (12) As this force is transmitted proximally, the IOM transfers some of this load from the radius to the ulna so that at the elbow 60% of the load is received by the radiocapitellar joint and 40% by the ulnohumeral joint.
At the carcasses, five development values were taken: carcass length (distance between the cranial medial edge of the pubis bone and the cranial medial edge of the first rib); leg length (distance between the cranial medial edge of the pubis and the radiocarpal joint
); arm length (distance between the olecranon tuberosity and the radiocarpal joint
); arm perimeter (obtained by surrounding it with a metric tape) in the median region of the arm, and the thigh thickness (measured with the help of a compass, perpendicular to the carcass length, taking the greatest distance between the cut that separates the two half-carcasses and the lateral muscles of the thigh) .
A dorsal approach was used to access the radiocarpal joint
. The scapholunate joint was completely disrupted and the lunotriquetral joint was found to be unstable as well.
The patient underwent MRI of the right hand, which showed synovial thickening of the radiocarpal joint
and MCP joints with flexor tendon tenosynovitis, compatible with inflammatory arthropathy (Figure 1).
A fat cushion (FC) can be observed dorsally to the joint capsule of the radiocarpal joint
, in longitudinal images; it is hypoechogenic and triangular in shape.
The including standards of the healthy volunteers were as following: no history of traumatic injury on the wrist, no osteoarthritis of the radiocarpal joint
, free of wrist pain, and with a normal range of motion in wrist.
At the level of the middle third of the forearm it continues with its tendon, wide and flat (Testut & Latarjet), which accompanies the ECRL muscle tendon until the radiocarpal joint
, where both pass through the second tendinous compartment of the retinaculum of the extensor muscles (Llusa Perez et al, 2004; Lippert; Moore et al.).
Intra-articular fractures with a step of over 2mm in the radiocarpal joint
inevitably result in osteoarthritis and functional impairment.
Later on osteoarthritis changes at radiocarpal joint
Care was taken to avoid excessive palmar flexion of the radiocarpal joint
, which can result in an acute carpal tunnel syndrome.
At the wrist, RA leads to soft-tissue swelling around the radiocarpal joint
and may result in prominence of the ulna styloid and the dinner-fork deformity (due to volar subluxation of the carpus in relation to the radius).