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PURPOSE Atypical femoral fractures (AFFs) are stress-related fractures that are speculated to associate with long-term treatment with bisphosphonates for osteoporosis. A history of AFF is a high risk factor for the development of a subsequent AFF in the same location of the contralateral femur, suggesting that a patient's individual anatomical factor(s) are(More)
The long-term treatment with anti-resorptive drugs for osteoporotic patients is suggested to be associated with an increase in atypical femoral fractures (AFFs). However, their incidence, patient characteristics, and risk factors have not been fully elucidated especially in Asian countries. This retrospective observational cohort study found fourteen AFFs(More)
In total hip arthroplasty of the acetabular roof fixed by press-fit without screw fixation, there is little possibility for loosening to occur, because it is difficult for wear debris to enter between the cup and the acetabular roof, as screw holes are not present. However, stability is provided only by contact. In the case of acetabular dysplasia, it is(More)
The initial solid fixation of an uncemented acetabular component affects the amount of bone ingrowth. We had several problems with broken screws in cases of acetabular revision. In recent years, the development of uncemented components without screws has attempted to improve these problems. We started to use "press-fit"-type acetabular shells in November(More)
We report an unusual case of open posterolateral dislocation of the ankle without fracture following a motor vehicle accident. Most of previously reported cases are posteromedial dislocation. The anterolateral, posterolateral, and purely superior dislocations of the talus make up smaller percentage. The mechanism of this injury appears to be forced eversion(More)
The authors report an unusual case of hip subluxation after internal fixation without associated sepsis. We report one recently treated case in which a 75-year-old female experienced subluxation of her hip joint after open reduction and internal fixation for a trochanteric fracture. In this paper, we describe a case of progressive, spontaneous subluxation(More)
Calcification around the cervical spine is thought to be relatively rare case, among these conditions the calcification at the longus colli muscle is called retropharyngeal tendinitis and only several cases were reported in the literature. In this disease, the three characteristic clinical features are acute severe posterior neck pain without any trigger,(More)
This report describes a case of lunatomalacia associated with congenital synostosis between the capitate and the hamate, an association not previously reported. The case was examined in detail, and compared to the findings in the literature including observation regarding prognosis of lunatomalacia.
The patella plays an important role in the knee joint extension, and a patella fracture requires surgical treatment when it is accompanied by displacement of bone fragments and a joint surface gap. In patella fractures, there is disruption of the soft tissue structures that support the knee extension mechanism. We use a method of percutaneous cerclage(More)
Femoral head fracture associated with hip dislocation is relatively rare but very severe injury. Due to its severity and the need of joint exposure for the reduction of femoral head fracture, the surgical treatment cannot but accompany many complications, including the osteonecrosis of the femoral head, heterotopic ossification, and post-traumatic(More)