The Experts below are selected from a list of 22641 Experts worldwide ranked by ideXlab platform
Yukihide Iwamoto - One of the best experts on this subject based on the ideXlab platform.
-
bone spect ct of Femoral Head subchondral insufficiency fracture
Clinical Nuclear Medicine, 2015Co-Authors: Goro Motomura, Takuaki Yamamoto, Kazuyuki Karasuyama, Yukihide IwamotoAbstract:Subchondral insufficiency fracture of the Femoral Head may be confused with osteonecrosis, mainly because of radiological overlap. SPECT/CT with Tc-99 m hydroxymethylene diphosphonate images in 7 patients with subchondral insufficiency fracture were retrospectively reviewed and compared with those from 11 patients with symptomatic early osteonecrosis. In all of the hips with subchondral insufficiency fracture, SPECT/CT showed increased uptake at the subchondral lesions of the Femoral Head. On the other hand, in all of the hips with osteonecrosis, absence of uptake was confirmed at the subchondral lesions. SPECT/CT may assist in differentiating subchondral insufficiency fracture from osteonecrosis.
-
subchondral insufficiency fracture of the Femoral Head after internal fixation for Femoral neck fracture histopathological investigation
Skeletal Radiology, 2014Co-Authors: Kazuhiko Sonoda, Goro Motomura, Takuaki Yamamoto, Hidehiko Kido, Yukihide IwamotoAbstract:Late segmental collapse after internal fixation for Femoral neck fracture is the phenomenon observed in post-traumatic osteonecrosis of the Femoral Head (ON), which has generally been reported to occur over a year or more after internal fixation. Subchondral insufficiency fracture of the Femoral Head (SIF) has also been recognized to cause Femoral Head collapse, however, only two cases of SIF after internal fixation for Femoral neck fracture have been reported. We report a case with Femoral Head collapse observed 5 months after internal fixation for Femoral neck fracture, which was histopathologically diagnosed as SIF. Clinically, differentiating SIF from ON is important because some cases of SIF have been reported to heal without surgical treatments. The timing of Femoral Head collapse after Femoral neck fracture may be different between SIF and post-traumatic ON.
-
subchondral insufficiency fracture of the Femoral Head and acetabulum a case report
Journal of Bone and Joint Surgery American Volume, 2002Co-Authors: Goro Motomura, Takuaki Yamamoto, Keita Miyanishi, Kenzo Shirasawa, Yasuo Noguchi, Yukihide IwamotoAbstract:Subchondral insufficiency fracture of the Femoral Head generally occurs in elderly patients, who tend to have osteopenic bone and/or to be overweight. It characteristically presents as acute pain in the hip without obvious antecedent trauma1. Some subchondral insufficiency fractures of the Femoral Head resolve spontaneously2,3, but several have shown progressive collapse requiring surgical intervention1. Findings on magnetic resonance imaging are characterized by a subchondral linear or serpiginous pattern of very low signal intensity on T1-weighted images with an associated bone-marrow edema pattern. This subchondral low-intensity band has been shown histologically to be a fracture line4. In a recent study, eleven subchondral insufficiency fractures of the Femoral Head were associated with rapid destruction of the hip joint similar to that seen in rapidly destructive arthrosis of the hip joint5. The prognosis for subchondral insufficiency fractures of the Femoral Head thus remains unclear. Previous investigators have examined histological specimens obtained from the Femoral Head1-5. We describe a case of an early-stage subchondral insufficiency fracture in which histological sections were obtained from both the Femoral Head and the acetabulum. We found a subchondral fracture on the acetabular side as well as in the Femoral Head. A sixty-four-year-old woman had a sudden onset of severe pain in the right hip when she bent to pick up something from the floor. The pain persisted, even at night, and a limp developed. There was no history of steroid therapy or alcoholism. The patient's height was 157 cm, she weighed 82 kg, and the body mass index (33.3) indicated obesity. On examination, the range of motion of the right hip was slightly limited (115° of flexion, 40° of abduction, 20° of adduction, 15° of external rotation, and 20° of internal rotation). …
Hee Joong Kim - One of the best experts on this subject based on the ideXlab platform.
-
collapsed subchondral fatigue fracture of the Femoral Head
Orthopedic Clinics of North America, 2009Co-Authors: Youngkyun Lee, Jeong Joon Yoo, Kyunghoi Koo, Kang Sup Yoon, Byung Woo Min, Hee Joong KimAbstract:Several etiologies can lead to a subchondral fracture of the Femoral Head, which may result in Femoral Head collapse and degenerative change. This article evaluates the follow-up results of subchondral fatigue fractures of the Femoral Head in which Femoral Head collapse occurred. The study shows that collapsed subchondral fatigue fractures of the Femoral Head have a benign clinical course quite unlike that of collapsed osteonecrosis of the Femoral Head.
-
subchondral fracture of the Femoral Head in healthy adults
Clinical Orthopaedics and Related Research, 2007Co-Authors: Jong Won Kim, Jeong Joon Yoo, Byung Woo Min, Sung Hwan Hong, Hee Joong KimAbstract:UNLABELLED Subchondral fracture of the Femoral Head has been reported to occur as an insufficiency fracture associated with poor bone quality or as a fatigue fracture in young military recruits. Transient osteoporosis of the hip has clinical and imaging findings that resemble those of a subchondral fracture, but it usually occurs in healthy middle-aged people not involved in sports or similar activities. The clinical aspects of five cases of subchondral fracture of the Femoral Head occurring in four healthy adults without antecedent trauma were evaluated. Of particular interest were whether subchondral fracture of the Femoral Head could occur without a sudden increase in daily activity and what differences could be detected from the imaging and clinical courses between subchondral fracture of the Femoral Head and transient osteoporosis of the hip. Three cases of subchondral fracture of the Femoral Head occurred without an increase in daily activity. The only difference in imaging findings between subchondral fracture of the Femoral Head and transient osteoporosis of the hip was the existence of a subchondral fracture line seen on magnetic resonance images of a subchondral fracture of the Femoral Head. The clinical courses of these disorders were similar. These findings suggest transient osteoporosis of the hip and subchondral fracture of the Femoral Head are subchondral bone injuries of different severity. LEVEL OF EVIDENCE Level IV, prognostic study. See the Guidelines for Authors for a complete description of levels of evidence.
-
subchondral fatigue fracture of the Femoral Head in military recruits
Journal of Bone and Joint Surgery American Volume, 2004Co-Authors: Won Seok Song, Jeong Joon Yoo, Kyunghoi Koo, Kang Sup Yoon, Youngmin Kim, Hee Joong KimAbstract:BackgroundSubchondral stress fracture of the Femoral Head is a rare condition that usually occurs as an insufficiency fracture in people with poor bone quality. We evaluated the clinical characteristics of subchondral fatigue fractures of the Femoral Head that occurred in young, healthy military rec
Michael D Ries - One of the best experts on this subject based on the ideXlab platform.
-
effect of Femoral Head size and abductors on dislocation after revision tha
Clinical Orthopaedics and Related Research, 2007Co-Authors: Peter L Kung, Michael D RiesAbstract:Dislocation is a common complication after revision total hip arthroplasty, particularly if the abductor mechanism is deficient. Use of a large Femoral Head may reduce the incidence of dislocation. However, it is not clear if the large Femoral Head is effective in controlling dislocation when the abductor mechanism is deficient. We separated 230 patients who underwent revision total hip arthroplasty into four groups: Group 1 (159 patients) had an intact abductor mechanism and a 28-mm Femoral Head, Group 2 (20 patients) had an absent abductor mechanism (trochanteric nonunion or complete segmental proximal Femoral bone loss) and a 28-mm Femoral Head, Group 3 (42 patients) had an intact abductor mechanism and a 36-mm Femoral Head, and Group 4 (nine patients) had an absent abductor mechanism and a 36-mm Femoral Head. The minimum followup was 6 months (mean, 27 months; range, 6 months to 7 years). A 36-mm Head was associated with a lower dislocation rate after revision total hip arthroplasty than a 28-mm Head with an intact abductor mechanism; the rate of dislocation was 12.7% for Group 1, 40.0% for Group 2, 0% for Group 3, and 33.3% for Group 4. However, the use of a large-diameter Head does not reduce the rate of dislocation if the abductor mechanism is absent.
-
relationship between Femoral Head size and distance to lesser trochanter
Clinical Orthopaedics and Related Research, 2007Co-Authors: Robert C Sproul, H.m. Reynolds, Jeffrey C Lotz, Michael D RiesAbstract:Hemiarthroplasty of the hip is a common treatment for displaced fractures of the Femoral neck. However, accurate restoration of leg length may be difficult to achieve because intraoperative measurements of leg length and preoperative templating are limited by the fracture. Our primary question was whether Femoral Head diameter can be used to predict Femoral Head height. We analyzed 34 cadaveric femora to determine diameter of the Femoral Head, distance from the lesser trochanteric sulcus to the external center of the Femoral Head (Head height), lateral distance from the proximal tip of the greater trochanter to the center of the Femoral Head (offset), and the Femoral neck/shaft angle. The Femoral Head diameter had a linear correlation with Head height expressed by the following equation: Head height = 1.035 x Femoral Head diameter. Our results indicate the diameter of the Femoral Head is similar in size to the distance from the top of the lesser trochanter to the center of the Femoral Head in an average population of cadavers. This may be a helpful clinical measurement to assess leg length during surgical treatment of hip fractures.
Takuaki Yamamoto - One of the best experts on this subject based on the ideXlab platform.
-
bone spect ct of Femoral Head subchondral insufficiency fracture
Clinical Nuclear Medicine, 2015Co-Authors: Goro Motomura, Takuaki Yamamoto, Kazuyuki Karasuyama, Yukihide IwamotoAbstract:Subchondral insufficiency fracture of the Femoral Head may be confused with osteonecrosis, mainly because of radiological overlap. SPECT/CT with Tc-99 m hydroxymethylene diphosphonate images in 7 patients with subchondral insufficiency fracture were retrospectively reviewed and compared with those from 11 patients with symptomatic early osteonecrosis. In all of the hips with subchondral insufficiency fracture, SPECT/CT showed increased uptake at the subchondral lesions of the Femoral Head. On the other hand, in all of the hips with osteonecrosis, absence of uptake was confirmed at the subchondral lesions. SPECT/CT may assist in differentiating subchondral insufficiency fracture from osteonecrosis.
-
subchondral insufficiency fracture of the Femoral Head after internal fixation for Femoral neck fracture histopathological investigation
Skeletal Radiology, 2014Co-Authors: Kazuhiko Sonoda, Goro Motomura, Takuaki Yamamoto, Hidehiko Kido, Yukihide IwamotoAbstract:Late segmental collapse after internal fixation for Femoral neck fracture is the phenomenon observed in post-traumatic osteonecrosis of the Femoral Head (ON), which has generally been reported to occur over a year or more after internal fixation. Subchondral insufficiency fracture of the Femoral Head (SIF) has also been recognized to cause Femoral Head collapse, however, only two cases of SIF after internal fixation for Femoral neck fracture have been reported. We report a case with Femoral Head collapse observed 5 months after internal fixation for Femoral neck fracture, which was histopathologically diagnosed as SIF. Clinically, differentiating SIF from ON is important because some cases of SIF have been reported to heal without surgical treatments. The timing of Femoral Head collapse after Femoral neck fracture may be different between SIF and post-traumatic ON.
-
subchondral insufficiency fracture of the Femoral Head and acetabulum a case report
Journal of Bone and Joint Surgery American Volume, 2002Co-Authors: Goro Motomura, Takuaki Yamamoto, Keita Miyanishi, Kenzo Shirasawa, Yasuo Noguchi, Yukihide IwamotoAbstract:Subchondral insufficiency fracture of the Femoral Head generally occurs in elderly patients, who tend to have osteopenic bone and/or to be overweight. It characteristically presents as acute pain in the hip without obvious antecedent trauma1. Some subchondral insufficiency fractures of the Femoral Head resolve spontaneously2,3, but several have shown progressive collapse requiring surgical intervention1. Findings on magnetic resonance imaging are characterized by a subchondral linear or serpiginous pattern of very low signal intensity on T1-weighted images with an associated bone-marrow edema pattern. This subchondral low-intensity band has been shown histologically to be a fracture line4. In a recent study, eleven subchondral insufficiency fractures of the Femoral Head were associated with rapid destruction of the hip joint similar to that seen in rapidly destructive arthrosis of the hip joint5. The prognosis for subchondral insufficiency fractures of the Femoral Head thus remains unclear. Previous investigators have examined histological specimens obtained from the Femoral Head1-5. We describe a case of an early-stage subchondral insufficiency fracture in which histological sections were obtained from both the Femoral Head and the acetabulum. We found a subchondral fracture on the acetabular side as well as in the Femoral Head. A sixty-four-year-old woman had a sudden onset of severe pain in the right hip when she bent to pick up something from the floor. The pain persisted, even at night, and a limp developed. There was no history of steroid therapy or alcoholism. The patient's height was 157 cm, she weighed 82 kg, and the body mass index (33.3) indicated obesity. On examination, the range of motion of the right hip was slightly limited (115° of flexion, 40° of abduction, 20° of adduction, 15° of external rotation, and 20° of internal rotation). …
-
insufficiency subchondral fracture of the Femoral Head
The American Journal of Surgical Pathology, 2000Co-Authors: Takuaki Yamamoto, Robert J Schneider, Peter G BulloughAbstract:The authors recently encountered a 65-year-old osteoporotic woman who had had intractable pain in the hip joint that was diagnosed clinically as osteonecrosis. She was treated by total hip replacement. Histopathologically, the most striking finding was the presence of a subchondral fracture with associated callus formation and granulation tissue along both sides of the fracture line. There was no evidence of antecedent osteonecrosis. This case was diagnosed histopathologically as insufficiency subchondral fracture of the Femoral Head. This is the first case report to substantiate the presence of insufficiency subchondral fracture of the Femoral Head by both gross and microscopic examination. Because the treatment and management of insufficiency subchondral fracture are entirely different from osteonecrosis, it is important to differentiate between these two conditions.
Youwen Liu - One of the best experts on this subject based on the ideXlab platform.
-
sartorius muscle pedicle bone graft for osteonecrosis of the Femoral Head
International Orthopaedics, 2016Co-Authors: Xiantao Chen, Xuyi Tan, Shutu Gao, Xiaodong Zhang, Youwen LiuAbstract:This study summarises the clinical efficacy of sartorius muscle-pedicle bone graft in osteonecrosis of the Femoral Head. A total of 58 patients, including 53 men (61 hips) and five women (6 hips) with osteonecrosis of the Femoral Head, underwent sartorius muscle-pedicle bone grafting. Association Research Circulation Osseous (ARCO) staging was performed. The ARCO staging revealed 23 hips of stage I, 36 hips of stage II and eight hips of stage III. The average surgical duration was 65 minutes (range 45–90 minutes). A total of 55 (64 hips) of the 58 patients undergoing surgery were followed up, with a mean follow-up duration of 34.48 months (range, 24–48 months) and a median of 34 months. The outcome was excellent in 27, good in 24, normal in two, and poor in 11 hips, with a total good rating of 79.68 %. The Harris score of the hip joints in the last follow-up was significantly improved compared with pre-surgical scores (P < 0.01). Imaging results showed that 21 hips were improved, 31 hips were stabilized and 12 hips were aggravated (of which 9 hips underwent total hip replacement). The survival rate of Femoral Head was 81.25 %. Sartorius muscle-pedicle bone graft significantly promotes repair of osteonecrosis of the Femoral Head, improves the Harris score of the hip joints, with good clinical efficacy. It effectively improves the survival rate of Femoral Head, delaying or preventing artificial hip replacement.
