Treatment of acromioclavicular joint separations in Japan: a survey.

Background: Treatment options for acromioclavicular joint (ACJ) separations are highly dependent on severity, as well as the patient's background. Furthermore, some patients can be switched from conservative to surgical treatment. In this study, we conducted a mail-based questionnaire survey of members of the Japan Shoulder Society on the administration of treatments for ACJ separations.

Methods used to assess the severity of acromioclavicular joint separations in Japan: a survey.

Background: In acromioclavicular joint (ACJ) separations, patient characteristics determine the indications for surgery. However, in Japan, classification methods used to assess the severity of ACJ separations differ between institutions, and even within a classification method, different interpretations can lead to different assessments of severity. Therefore, in this study, we conducted an email survey of Japan Shoulder Society (JSS) members regarding their assessment methods for ACJ separation severity.

Outcomes and function of conoid ligament on the basis of postoperative radiographic findings of arthroscopic stabilization for the distal clavicle fractures.

Purpose: Distal clavicle fractures are divided into three types according to Neer's classification. These fractures are usually treated with a sling to immobilize the upper extremity, however, the treatment of type 2 fractures remain controversial. We focused on the anatomical basis of these fractures in which disruptions in the conoid ligament led to the distraction between the two bony fragments.

Representative survey of frozen shoulder questionnaire responses from the Japan Shoulder Society: What are the appropriate diagnostic terms for primary idiopathic frozen shoulder, stiff shoulder or frozen shoulder?

Background: Primary frozen shoulder has unknown etiology and significant restriction of active and passive motion. The distinction between frozen shoulder and stiff shoulder has been unclear. Therefore, the purposes of this study were to perform a survey regarding definition and classification of frozen shoulder proposed by the American Academy of Orthopedic Surgeons (AAOS) among the members of the Japan Shoulder Society (JSS) and to compare the results with those obtained among the members of the American Shoulder and Elbow Surgeons (ASES).

Isolated Tear of the Teres Major Muscle.

Rotator cuff tears are frequently treated in daily clinical practice. However, there have been few reports of tears around the shoulder involving the latissimus dorsi and teres major muscles. The author reports the rare case of an isolated tear of the teres major muscle with symptom onset during ordinary sports activities without a clear traumatic mechanism.

Changes in surgical procedures for acromioclavicular joint dislocation over the past 30 years.

Generally, surgical treatment is recommended for Rockwood type 5 traumatic acromioclavicular joint dislocations. Since 1980, the authors have performed the modified Dewar procedure, the modified Cadenat procedure, and anatomical reconstruction of the coracoclavicular ligaments for this injury. The goal of this study was to determine the ideal surgical procedure for acromioclavicular joint dislocations by comparing these 3 procedures.

A case of acute dorsal radiocarpal dislocation with radial styloid fracture.

We describe a case report of dorsal radiocarpal dislocation with fracture of the radial styloid process. A 21-year-old right-handed male was injured in a fall while snowboarding. Plain radiographic findings revealed dorsal dislocation of radiocarpal joint with fracture of the radial styloid process; we performed CT studies to examine the radius fracture in greater detail.

Arthroscopic stabilization for Neer type 2 fracture of the distal clavicle fracture.

The distal clavicle fractures are divided into three types according to Neer's classification. Types 1 and 3 fractures are treated with a sling to immobilize the upper extremity. However, the treatment of type 2 fractures is controversial.

Osteoid osteoma of the great toe.

Osteoid osteoma is a relatively common osteoblastic lesion of benign skeletal neoplasms and occurs most commonly in the cortex of long bones, especially the femur and the tibia. Radiological characteristics are a nidus that appears as a small, relatively radiolucent zone within an area of extensive reactive sclerosis. Clinically, the lesion presents with increasing pain, is worse at night, and is relived by nonsteroidal anti-inflammatory drugs (NSAIDs).

Irreducible dislocation of the radial head with undisplaced olecranon fracture in a child: a case report.

Irreducible isolated dislocation of the radial head is a rare injury. In this study, we describe a patient with irreducible dislocation of the radial head associated with an undisplaced fracture of the olecranon. A 6-year-old girl fell down while walking and suffered injury to the posterior aspect of the proximal ulnar shaft with the right elbow in a slightly flexed position.

Dupuytren's contracture limited to the distal interphalangeal joint: a case report.

Dupuytren contracture is not a rare disorder. However, the contracture limited to the DIP joint is rare conditions. In this study, we describe a case of Dupuytren contracture limited to the DIP joint occurred in the ring finger.

The coracoclavicular ligaments: an anatomic study.

Purpose: The treatment for the acromioclavicular joint dislocations has focused on anatomic restoration of the coracoclavicular ligaments. We reviewed the detailed anatomy of trapezoid ligaments and conoid ligaments using cadavers.

Methods: The subjects were 40 shoulders of the 20 cadavers.

Risk of motion loss with combined Bankart and SLAP repairs.

We have performed arthroscopic Bankart procedures using absorbable or metallic suture anchors for traumatic anterior shoulder instability for over a decade. This article describes the frequency, pathology, and therapeutic results of patients treated for superior labrum anterior and posterior (SLAP) lesions concomitant with Bankart lesions. Twenty patients (Group A) had a mean age of 33.

Triple joint injuries of the same digit.

This article presents a rare case of simultaneous triple joint injuries in the same digit. A 54-year-old, right-handed man sustained simultaneous triple joint injuries in a digit, composed of a fracture of the dorsal base of the distal phalanx involving one-third of the phalanx, dorsal dislocation of the proximal interphalangeal joint with a volar plate fracture, and ulnal dislocation of the metacarpophalangeal joint. Surgery was performed on the patient.

Dorsal transscaphoid transtriquetral perilunate dislocation with pseudoarthrosis of the scaphoidy.

All perilunate fracture-dislocations combine ligament ruptures, bone avulsions, and fractures in a variety of clinical forms. Two mechanisms of the injury may result in a carpal dislocation: direct and indirect. Most dorsal perilunate dislocations are the result of an indirect mechanism of injury, usually consisting of an extreme extension of the wrist joint, associated with variable degree ulnar deviation and radiocarpal or midcarpal supination.

A combined fracture of the greater and lesser tuberosity with head shaft continuity in the proximal humerus.

We treated a combined fracture of the greater and lesser tuberosity with head shaft continuity in the proximal humerus. This case is impossible to classify in three of the classifications, the Neer classification, AO Müller classification, or Jakob classification. However, this case has been described as fracture types in two different categories in the Codman classification.

Mechanical strength and optimal site of placement of a threaded bone screw assessed on the basis of the screw breakage for non-union of the scaphoid: a biomechanical study.

We have performed the surgical procedure on the patients with the fracture of the scaphoid using mini-acutrak screws (ACUMED, Inc.). A 25-year-old man was injured in a fall.

Unusual combined scaphoid and lunate fracture of the wrist: a case report.

All perilunate fracture-dislocations combine ligament ruptures, bone avulsions, and fractures in a variety of clinical forms. The most frequent is the dorsal trans-scaphoid perilunate dislocation. In rare cases, however, these dislocations also have been associated with capitate fractures, triquetral fractures, or lunate fracture.

Intraarticular lesions in traumatic anterior shoulder instability: a study based on the results of diagnostic imaging.

Background: Diagnostics of intraarticular lesions is important in the treatment of traumatic anterior shoulder instability.

Patients And Methods: We studied 30 patients: 26 men and 4 women. For all patients preoperative examinations involved arthrography, CT arthrography, MR arthrography, and 3D-CT.

Histological and ultrastructural changes in the undersurface of the acromion with subacromial impingement.

Background: We examined histological changes in the undersurface of the acromion in patients with symptoms of subacromial impingement, in order to clarify whether or not these changes are the main cause of rotator cuff tear.

Methods: We studied 39 shoulders. The undersurface of the acromion and the coracoacromial ligament were examined by light microscopy and transmission electron microscopy.

[Therapeutic results of the proximal humeral neck fractures].

Good therapeutic results can be obtained by conservative treatments for the proximal humeral neck fractures. However, surgical treatment is sometimes required in patients with 2- or 3-part fractures (Neer's classification) in whom the reduction of the fracture is unable to be maintained by conservative treatments. In this study, we performed the surgical treatment using anatomical bone plate on these patients and evaluated the therapeutic results.