Late-stage Freiberg disease treated by osteochondral plug transplantation: a case series.

Background: The purpose of this study was to investigate the clinical, radiological and arthroscopic results of osteochondral plug transplantation for late-stage Freiberg disease.

Materials And Methods: We examined 4 consecutive cases of late-stage Freiberg disease of the second metatarsal head. All 4 patients were female with an average age of 12.

Spontaneous oscillation and mechanically induced calcium waves in chondrocytes.

The characteristics of spontaneous calcium (Ca(2+)) oscillation and mechanically induced Ca(2+) waves in articular chondrocytes were studied. In some, but not all, chondrocytes in sliced cartilage and primary cultures, we observed spontaneous oscillation of intracellular Ca(2+) that never spread to adjacent cells. In contrast, a mechanical stimulus to a single cell by touching with a glass rod induced an increase of intracellular Ca(2+) that spread to neighboring cells in a wave-like manner, even though there was no physical contact between the cells.

Arthroscopic treatment for anterior impingement exostosis of the ankle: application of three-dimensional computed tomography.

The purpose of this study was to evaluate the operative results of excision of anterior impingement exostoses of the ankle. Preoperative three-dimensional computed tomography (3DCT) was used to make the diagnoses. The authors evaluated 16 ankles of 16 patients who underwent arthroscopic resection of the osteophytes of their anterior distal tibia or dorsal talus.

Osteochondral lesions of the talar dome associated with trauma.

Purpose: The purpose of this study was to clarify the differences in the causes of osteochondral lesions (OCL) of the ankle based on the presence of distal fibular fractures and lateral instability of the ankle.

Type Of Study: Case series.

Methods: We evaluated 92 cases of distal fibular fractures and 86 cases of lateral instability of the ankle, including 36 feet with subacute lateral instability of the ankle and 50 feet with chronic lateral instability of the ankle.

Arthroscopic drilling for chondral, subchondral, and combined chondral-subchondral lesions of the talar dome.

Purpose: We investigated the efficacy of drilling as a treatment for chondral (C), subchondral (S), and combined chondral-subchondral (CS) lesions of the talar dome associated with trauma, using magnetic resonance imaging (MRI), ankle arthroscopy, and the ankle-hindfoot scale of the American Orthopaedic Foot and Ankle Society (AOFAS score).

Type Of Study: Case series study.

Methods: Arthroscopic drilling was performed on 72 patients whose lesions were less than 7 mm in diameter.

Injury of the tibiofibular syndesmosis: value of MR imaging for diagnosis.

Purpose: To compare the use of magnetic resonance (MR) imaging with the use of arthroscopy for the diagnosis of tibiofibular syndesmotic injury.

Materials And Methods: This study involved 58 patients who had ankle sprains or distal fibular fractures and underwent surgery. All patients were examined with MR imaging for diagnosis of tibiofibular syndesmotic injury.

Symptomatic os subfibulare caused by accessory ossification: a case report.

Separated ossicles at the tip of the lateral malleolus, the condition known as os subfibulare, are sometimes a cause of ankle pain. There are two theories regarding the origin of os subfibulare. One theory proposes that it is caused by an avulsion fracture attributable to pull of the anterior talofibular ligament, whereas the other theory proposes that it is the result of an accessory ossification center.