China 
Africa 
Explore chapters and articles related to this topic
Orthopaedic Emergencies
Published in Anthony FT Brown, Michael D Cadogan, Emergency Medicine, 2020
Anthony FT Brown, Michael D Cadogan
Request X-rays that are easy to misinterpret as ‘normal’ in lunate dislocation, but look particularly for: The normal curved joint space between the distal radius and the scaphoid and lunate is disrupted on the anteroposterior view, so the lunate looks triangular instead of quadrilateral.The dislocated lunate lies anteriorly on the lateral view, in the shape of the letter ‘C’.
A to Z Entries
Published in Clare E. Milner, Functional Anatomy for Sport and Exercise, 2019
The wrist is formed primarily between the distal end of the radius of the forearm and the carpal bones of the hand (radiocarpal joint) and indirectly with the ulna of the forearm (ulnocarpal joint); the ulna is separated from the carpal bones by an articular disc, although it is connected to them via ligaments. The carpal bones involved in the wrist joint are the scaphoid, lunate, and triquetral. These three bones together form a convex surface that articulates with the concave surface of the distal radius, forming a condyloid joint. The joint is supported by the palmar and dorsal radiocarpal and ulnar and radial collateral ligaments. The wrist is capable of flexion, extension, abduction, adduction, and circumduction movements. Extension is the largest movement occurring at the wrist, followed by flexion, then adduction, and abduction. Circumduction is achieved as a combination of these movements. No axial rotation is possible at the wrist; instead, this movement occurs through pronation and supination of the radius and ulna in the forearm (see elbow and forearm – joints).
Extremity trauma
Published in Professor Sir Norman Williams, Professor P. Ronan O’Connell, Professor Andrew W. McCaskie, Bailey & Love's Short Practice of Surgery, 2018
Professor Sir Norman Williams, Professor P. Ronan O’Connell, Professor Andrew W. McCaskie
The most commonly involved carpal bone is the lunate. A lunate dislocation is where the lunate bone dislocates out of the radiocarpal joint. In a perilunate dislocation the lunate remains in the radiocarpal joint and the rest of the carpus dislocates around the lunate. Lunate and perilunate dislocations are easily missed unless careful attention is paid to carpal alignment on the lateral radiograph (Figure28.19). Review of the radiographs should particularly ensure the anatomical location of the lunate in the radiocarpal fossa and that the capitate in the ‘cup' of the lunate is maintained.
Successful closed reduction of a trans-scaphoid perilunate dislocation in a 11-year-old boy: a case report
Published in Acta Chirurgica Belgica, 2023
Pierre Meynard, Audrey Angelliaume, Luke Harper, Gilles Mouret, Eric Hammel
The stability of the carpus is ensured by intrinsic ligaments (mainly the scapholunate and the lunotiquetral ligament) and by extrinsic ligaments (mainly the volar ligament: the radioscaphocapitate, the radiotriquetral and the ulnotriquetral). Perilunate dislocation begins on the radial side of the wrist and progresses in a sequential injury around the lunate [12]. Johnson [13] used the notion of lesser and a greater arc. The lesser arc injury is only ligamentous whereas the greater arc injury includes both ligament and bone lesions. In greater arc injury, the lesion can include:A scaphoid fracture with or without a scapholunate interosseous ligament disruptionA capitate fracture or a radioscaphocapitate ligament disruptionA Triquetrum fracture or a radiotriquetral ligament disruptionAn ulnar styloid fracture or an ulnotriquetral and/or ulnar collateral ligament.
A case of scaphocapitate arthrodesis for a failed lunate prosthesis in kienbock disease – 35 year follow up
Published in Case Reports in Plastic Surgery and Hand Surgery, 2022
The treatment of Kienbock disease continues to be a challenging endeavor, since it’s recognition as osteonecrosis of the lunate in the early 1900s. The most commonly used classification system is that which was described by Lichtman et al. [1]. This radiographic based system, along with magnetic resonance imaging (MRI) and arthroscopy [2], have helped to guide the surgical treatment decision making process after non-operative options have been exhausted. Partial wrist arthrodesis (PWA), in particular, scaphocapitate (SC) arthrodesis, was first described as a treatment option for Kienbock disease by Pisano et al. in 1991 [3]. Currently, SC arthrodesis has been indicated for those with Lichtman stage IIIB disease, stage IIIA disease without negative ulnar variance, and failure of prior ‘joint leveling’ procedures [4–5]. Although its use has gained in popularity, long-term outcome results of SC arthrodesis are lacking. In this case report, we present the 35 year follow-up of a young, male laborer with early stage Kienbock disease after undergoing a scaphocapitate arthrodesis for a failed silicone lunate prosthesis.
Manual therapy for work-related wrist pain in a manual physical therapist
Published in Physiotherapy Theory and Practice, 2021
Alexandra R. Anderson, Craig P. Hensley
The patient presented with ulnar-sided wrist pain and a history of wrist instability and pain. Current complaints were postulated to be a result of repetitive non-thrust techniques to patients’ lumbar and thoracic spine, which had become problematic 6 months prior to evaluation. The clinical impression was LT joint pain secondary to repetitive microtrauma from her gymnastics history and current repetitive performance of manual therapy. Some pathologies could not be ruled out completely after the exam. For instance, Kienböck’s disease, or avascular necrosis of the lunate, requires imaging to make a diagnosis, but the patient had no systemic diseases that would increase her risk (Porteous, Harish, and Parasu, 2012). If conservative management failed, radiographs and/or further medical workup could be ordered to assist in the diagnosis process. Mobility at other intercarpal joints was deemed a contributing factor. The mechanism of injury from performing manual therapy was described in a position of repetitive wrist extension with compressive forces through the ulnar-side of the wrist.