Risk factors for rupture of extensor tendons in the rheumatoid wrist.

This study assessed the risk factors for spontaneous extensor tendon rupture in the rheumatoid wrist. The rupture group consisted of 25 wrists that had rupture of the extensor tendons and later received tendon reconstruction. The non-rupture group included 77 rheumatoid wrists without extensor tendon rupture.

A magnetoencephalographic study of longitudinal brain function alterations following carpal tunnel release.

We investigate changes in brain function before and after carpal tunnel release. Magnetoencephalography (MEG), during which we recorded somatosensory evoked cortical magnetic fields (SEFs), and a clinical evaluation were performed before surgery and 6 months after. The distance on the vertical axis between the equivalent current dipoles (ECDs) for the first and third digits before surgery was significantly less than after surgery.

Glomus Tumor Originating from a Digital Nerve.

Glomus tumors are relatively rare benign neoplasms that most commonly occur in the hand. They arise from the normal glomus body, which is an arteriovenous shunt related to thermoregulation. Glomus tumors in nerves are an extremely rare occurrence, as normal glomus bodies have not been found in nerves.

Incomplete Ossification of the Scaphoid Mimicking Obvious Radiographic Scapholunate Dissociation: A Case Report.

We report a patient of Scapholunate (SL) injury in which radiography revealed obvious SL dissociation with dorsal intercalated segment instability deformity, but arthroscopy showed a SL gap of less than 2 mm. Radiographs of the uninjured wrist showed a SL interval of 3.0 mm and a SL angle of 80°.

Wrist Swelling in Kienböck's Disease.

 Wrist swelling is a frequent clinical manifestation of Kienböck's disease, but no study has reported the site and pathology of wrist swelling in this disease. The aim of this study is to elucidate the site and pathology of wrist swelling in Kienböck's disease.  Dorsal and palmar soft tissue thicknesses of the wrist were measured on standard lateral radiographs of the wrist in 26 patients with Kienböck's disease and 30 subjects without intra-articular lesion.

Distal radius nonunion after volar locking plate fixation of a distal radius fracture: a case report.

We describe a 59-year-old man who had nonunion of a right distal radius fracture after volar locking plate fixation. He underwent open reduction and internal fixation with a volar locking plate system for a dorsally displaced, unstable distal radius fracture at a previous hospital 5 months ago. Radiographs of the injured wrist showed nonunion of the distal radius with 1.

Anterior interosseous nerve palsy mimicking rupture of the index flexor digitorum profundus after volar locking plate fixation of a distal radius fracture.

We describe the case of a patient with distal radius fracture who became unable to flex the distal interphalangeal joint of the index finger after internal fixation using a volar locking plate. There was palpable crepitus with active thumb motion, and wrist radiographs showed prominence of the volar plate at the watershed line. Therefore, our initial diagnosis was plate-induced closed rupture of the flexor digitorum profundus tendon of the index finger.

Carpal tunnel syndrome associated with Kienböck disease.

We retrospectively reviewed 12 patients (3 men and 9 women, with a mean age of 72 years) who were surgically treated for carpal tunnel syndrome associated with Kienböck disease. All patients except 1 were incidentally diagnosed with Kienböck disease and had little or no wrist pain. Radiographic tests revealed advanced Kienböck disease in all patients.

Mid- to long-term outcomes after surgical treatment of chronic anterior dislocation of the radial head in children.

Background: To evaluate the mid- to long-term clinical and radiographic outcomes after surgical treatment of chronic anterior dislocation of the radial head in children.

Methods: Open reduction was performed in 16 children (mean age, 9.3 years [range, 2.

Clinical effects of internal fixation for ulnar styloid fractures associated with distal radius fractures: A matched case-control study.

Background: Ulnar styloid fractures are often associated with distal radius fractures. However, controversy exists regarding whether to treat ulnar styloid fractures. This study aimed to evaluate clinical effects of internal fixation for ulnar styloid fractures after distal radius fractures were treated with the volar locking plate system.

Recovery function of somatosensory evoked brain response in patients with carpal tunnel syndrome: A magnetoencephalographic study.

Objective: The recovery function of somatosensory evoked magnetic fields (SEFs) was recorded to investigate excitatory and inhibitory balance in the somatosensory cortex of patients with carpal tunnel syndrome.

Methods: SEFs were recorded in patients and controls. Recordings were taken following median nerve stimulation with single and double pulses with interstimulus intervals of 10-200ms.

Ulnar impaction syndrome: incidence of lunotriquetral ligament degeneration and outcome of ulnar-shortening osteotomy.

Purpose: We hypothesized that most patients with ulnar impaction syndrome have degenerative changes of the proximal lunotriquetral (LT) membrane and that ulnar-shortening osteotomy is an effective procedure in these patients.

Methods: We retrospectively reviewed 50 wrists of 49 patients with idiopathic ulnar impaction syndrome who underwent an arthroscopic evaluation at the time of ulnar-shortening osteotomy, and subsequently at plate removal. Based on the Geissler classification, patients were divided into group A, normal, and group B, grades I to IV.

Mechanical advantages of a truss-structure-based fracture fixation system--a novel fracture fixation device "PinFix".

A small, light, ball-joint device called PinFix, which can instantly convert a simple percutaneous cross pin fracture fixation system into a rigid external fracture fixation system based on truss structure, was developed. The purpose of this study was to compare the mechanical load and breaking strength of this truss-structure-based fixation system to that of the conventionally used external cantilever structure-based fixation system. Three types of mechanical loading tests, axial, bending, and torsion, were performed on an artificial fractured bone treated with either three-dimensional PinFix fixation, two-dimensional PinFix fixation, or conventional external fixation.

Sonography-assisted arthroscopic resection of volar wrist Ganglia: a new technique.

Although satisfactory arthroscopic resection of volar wrist ganglia has been reported recently, the risk of damage to arteries, nerves, and tendons remains. Furthermore, ganglia and their stalks cannot be visualized arthroscopically in many cases, and surgeons must perform a blind resection of the joint capsule until ganglion cysts or their stalks appear. Sonography has limited resolution, but recent improvements in hardware and software have made it an excellent noninvasive and dynamic imaging technique for assessing the musculoskeletal system.

Stabilizing incomplete reduction of the radial head using a hinged splint: conservative treatment for a Monteggia equivalent lesion.

Radial head dislocation associated with plastic bowing of the ulna is classified as a Monteggia equivalent lesion. This injury in children can be treated by closed reduction, but manipulative reduction may not completely correct plastic bowing of the ulna. We encountered two cases of incomplete reduction in which the radial head was reduced in a supination position, but redislocated during rotation from neutral to a pronation position.

A surface-based hemangioma of the radius which posed radiological diagnostic difficulties.

Surface-based bone hemangiomas are uncommon, mostly occurring in long bones of the lower extremities. Radiographic surface-based bone hemangioma images may present various features that provide a diagnostic challenge. We report a case of surface-based hemangioma of the radius that posed radiological diagnostic difficulties.

Results of ulnar shortening osteotomy for ulnocarpal abutment after malunited distal radius fracture.

Surgical correction for ulnocarpal abutment syndrome after malunited distal radius fracture remains controversial. We reviewed sixteen patients (7 men, 9 women) who underwent isolated ulnar-shortening osteotomy for ulnar wrist pain as their main complaint. Mean age was 48 years.

Arthroscopically assisted repair of triangular fibrocartilage complex foveal tears.

Purpose: To give a detailed clinical outcome analysis of a consecutive series of patients treated arthroscopically for traumatic triangular fibrocartilage complex (TFCC) foveal tears.

Methods: This study was a consecutive case series of 11 patients who underwent arthroscopically assisted repair for traumatic TFCC foveal lesions. The mean age at the time of surgery was 27 years.

Clinical, radiographic, and arthroscopic outcomes after ulnar shortening osteotomy: a long-term follow-up study.

Purpose: Previous studies have investigated the long-term outcomes of ulnar shortening osteotomy (USO) in the treatment of ulnocarpal abutment syndrome (UCA), but none have used arthroscopic assessments. The purpose of this study was to investigate the long-term clinical outcomes of USO with patient-based, arthroscopic, and radiographic assessments.

Methods: We retrospectively reviewed 30 patients with UCA after a minimum follow-up of 5 years, with arthroscopic evaluations at the time of both USO and plate removal.

Residual wrist pain after volar locking plate fixation of distal radius fractures.

A prospective multicenter clinical study evaluated, using the Hand20 and hand diagram, the disability, incidence, location, and predictive factors of residual wrist pain 18 months after volar locking plate fixation of distal radius fracture in 122 patients. The average Hand20 score and numeric rating scores for pain were 13.1 +/- 18.

Favorable effects of explanatory illustrations attached to a self-administered questionnaire for upper extremity disorders.

Purpose: The Hand10 is a self-administered questionnaire for upper extremity disorders. This questionnaire consists of 10 short, easy-to-understand questions and explanatory illustrations. In the shortening and validation process, the Hand10 demonstrated high acceptability and reliability among elderly individuals, with the advantage of being compact.

Arthroscopic lunate morphology and wrist disorders.

Purpose: The lunate is classified into two types, one with a single distal facet and the other with two distal facets. The effect of lunate type on the incidence of wrist disease and trauma remains unclear. The purpose of this study is to evaluate a potential association between lunate morphology and wrist disorders.

Sonography-guided arthroscopy for wrist ganglion.

Purpose: To describe how to combine the complementary features of sonography and arthroscopy to make the arthroscopic resection of wrist ganglions a safer and more reliable surgery.

Methods: A total of 22 patients with wrist ganglions had sonography-assisted arthroscopic resection. Sonographic visualization of ganglions, adjacent structures (ie, vessels, nerves, and tendons), and the cycling tip of the arthroscopic shaver was assessed.

Tilt of the radius from forearm rotational axis reliably predicts rotational improvement after corrective osteotomy for malunited forearm fractures.

Forearm rotation occurs around an axis connecting the center of the radial head and the fovea of the distal ulna. The purpose of the present study was to demonstrate the usefulness of the difference between forearm and proximal radial axis in the treatment of malunited forearm fractures. We reviewed the results of eight corrective osteotomies for malunited fractures of the forearm without dislocations of the wrist or elbow.