'Necrotising periodontal diseases' is an umbrella term for necrotising gingivitis, periodontitis, stomatitis and noma. These rapidly destructive conditions are characterised by pain, interdental ulceration gingival necrosis which, if left untreated, can result in osteonecrosis. Research indicates that patients with a history of alcohol misuse at increased risk malnutrition, which negatively aff...

-stress fractures with surrounding bone marrow edema are most commonly seen in the medial femoral condyle and medial tibia secondary to radial or complex tears of the medial meniscus; the bone cut off from its blood supply by the subchondral fracture is at risk to develop osteonecrosis, therefore a follow-up MRI is typically useful in this setting to ensure fracture healing and exclude the deve...

Mueller-Weiss syndrome is a rare entity related to adult-onset spontaneous osteonecrosis of the navicular. It is a painful and debilitating illness, which is more frequent in women and can be either unilateral or bilateral. It was first described by Walther Mueller in 1927, who believed this condition was due to chronic compression of the navicular from the adjacent bones. In 1929, Konrad Weiss...

Bisphosphonates are a common treatment for osteoporosis. Osteonecrosis of the jaw has been associated with the use of bisphosphonates, usually when they have been used parenterally to treat malignancies. Cases associated with oral bisphosphonate as a treatment for osteoporosis are less frequent. We describe two patients exhibiting the clinical manifestations of bisphosphonate-associated osteone...

Most studies agree that the fate of femoral head osteonecrosis is associated with the size and location of the necrotic lesion. We present a volumetric method for assessment of osteonecrosis, based on magnetic resonance imaging. The method evaluates the percentage of the necrotic volume in the femoral head and in each of the head segments (octants). Along with the method, we present a classific...

Osteonecrosis of the femoral head is an uncommon complication following hip arthroscopy, generally due to an excessive traction of the limb and high intracapsular pressures of the hip. This complication entails catastrophic outcomes for the femoral head with collapse and degeneration, resulting in another surgical procedure. We present a case of a 21 year-old soccer player that underwent arthro...

Osteonecrosis of the femoral head can be caused by a variety of disorders and affects the relatively young patient. Most studies have concentrated on the femoral changes; the sites of early lesions of the labrum and acetabular cartilage have not been recorded. We studied 17 hips with osteonecrosis and a wide congruent joint space on radiographs and by direct inspection of the femoral head, labr...

We describe injuries to the posterior root of the medial meniscus in patients with spontaneous osteonecrosis of the medial compartment of the knee. We identified 30 consecutive patients with spontaneous osteonecrosis of the medial femoral condyle. The radiographs and MR imaging were reviewed. We found tears of the posterior root of the medial meniscus in 24 patients (80%). Of these, 15 were com...