abstract background: the varieties of treatment methods for the scaphoid non::::union:::: have always been a discussable issue for orthopaedic surgeons. the current study, considered to be review for treatment results of the patients who sustained the scaphoid non::::union:::: with or without avascular necrosis and compared these two groups clinically and radiologically. methods: the clinical a...

Steroid induced osteonecrosis is a devastating injury that usually requires rebuild of the joint, with the femoral and the humeral head being most commonly affected. Steroid therapy is the most common reported cause of atraumatic osteonecrosis. The Collaborative Osteonecrosis Group Study confirmed that steroids are the primary cause of multi-focal osteonecrosis in 91% of the cases. Osteonecrosi...

OBJECTIVE The pathophysiology of non-traumatic osteonecrosis (ON) or avascular necrosis (AVN) of the femoral head remains poorly understood. Some studies have suggested the contribution of underlying thrombophilia as a mechanism; however, no specific thrombophilic factor has been consistently found in association with the disease. We are presenting data suggesting a role for endothelial cell ac...

No consensus regarding optimal treatment or etiology of Preiser disease exists. We described the epidemiology,classification and treatment characteristics of 18 patients with Preiser disease. Patients with changes related to previoustrauma, and without radiographs were excluded. Based on the radiographs at diagnosis, we classified 13 scaphoids asHerbert Lanzetta stage II, four...

Introduction: The avascular osteonecrosis of the femoral head (AOFH) is a common complication sickle cell disease (SCD). It exposes to lameness and sometimes very debilitating handicap. source desocialization, particularly in developing countries where prosthetic surgery remains inaccessible majority. This survey aimed identify risk occurence AOFH.
 Materials Methods: was case-control stud...

 Abstract Background: The varieties of treatment methods for the scaphoid non:::union::: have always been a discussable issue for orthopaedic surgeons. The current study, considered to be review for treatment results of the patients who sustained the scaphoid non:::union::: with or without avascular necrosis and compared these two groups clinically and radiologically. Methods: The clinical and ...

Posttraumatic osteonecrosis of the femoral head (ONFH) is the most serious complication after fracture dislocation of the femoral head. The rate of this complication was reported to range from 1.7% to 40%. Although the development of posttraumatic osteonecrosis normally occurs within 2 years of injury, there are some reports of the late development ONFH. The authors encountered a case of posttr...

Osteonecrosis or avascular osteonecrosis (AVN) of the femoral head is a devastating multifactorial disease that affects 20 000 persons each year in the United States. The purpose of this systematic review was to determine the efficacy and safety of alendronate for adult AVN during short- and long-term follow-up. Electronic databases were searched for randomized or nonrandomized clinical trials,...

BACKGROUND Surgically, it is difficult to achieve union of a scaphoid nonunion that is associated with osteonecrosis of the proximal pole, and those with carpal collapse are especially difficult to treat. A variety of vascularized bone grafts can be used. The purpose of this study was to compare the effectiveness of two types of vascularized bone graft -- a distal radial pedicle graft and a fre...

One hundred patients irradiated for cancers of the oral cavity, oropharynx, and nasopharynx were evaluated for the occurrence of osteonecrosis and associated predisposing factors. Selection was based on availability of complete dental records, a minimum of six months follow-up, and treatment fields, which included maxilla and/or mandible. Bone doses were calculated by using radiotherapy treatme...