Survival and clinical results of a modified "crosse de hockey" procedure for chronic isolated patellofemoral joint osteoarthritis: mid-term follow-up.

Background: The optimum treatment for isolated patellofemoral joint osteoarthritis (PFJ-OA) remains controversial. The aim of this study was to assess the mid-term clinical results of a modified crosse de hockey procedure for the treatment of isolated PFJ-OA.

Materials And Methods: We assessed 37 knees in 31 patients treated by a modified crosse de hockey procedure.

Total hip arthroplasty using a Kerboull-type plate for rapidly destructive coxarthrosis: comparison with uncemented acetabular component.

Introduction: Clinical outcomes of total hip arthroplasty (THA) to treat rapidly destructive coxarthrosis (RDC) have been reported, but to our knowledge, there have been no studies comparing implants. The aim of this study was to examine the effectiveness of acetabular reconstruction for RDC by comparing the clinical results of THA using a Kerboull-type plate with an uncemented cup.

Patients And Methods: Among 921 primary THAs performed between 2006 and 2014, 27 were performed for the treatment for RDC using a Kerboull-type plate or a conventional uncemented cup.

The fracture sites of atypical femoral fractures are associated with the weight-bearing lower limb alignment.

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 related to the fracture site of AFFs. In this study, we investigated the radiographs of fourteen AFFs (four bilateral fractures among ten patients) treated at six hospitals associated with our university between 2005 and 2010.

The incidence of and risk factors for developing atypical femoral fractures in Japan.

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 in ten patients (four bilateral fractures) among 2,238 hip and femoral shaft fractures treated in our associated hospitals between 2005 and 2010; this incidence (0.

Bipolar hemiarthroplasty for femoral neck fracture using the direct anterior approach.

Aim: To evaluate whether walking ability recovers early after bipolar hemiarthroplasty (BHA) using a direct anterior approach.

Methods: Between 2008 and 2010, 81 patients with femoral neck fracture underwent BHA using the direct anterior approach (DAA) or the posterior approach (PA). The mean observation period was 36 mo.

Comparison of therapeutic outcomes of periprosthetic femoral fracture between treatments employing locking and conventional plates.

Introduction: Locking plate is considered biomechanically advantageous for porotic bone, compared with conventional plate. However, clinical evaluations of locking and conventional plates for periprosthetic femoral fracture are still controversial. Thus, we investigated the usefulness of a locking plate compared with the conventional plate for treatment for this fracture.

Pathological fracture due to vertebral osteonecrosis associated with pancreatitis.

A 50-year-old man with a history of alcohol-induced pancreatitis was admitted to a hospital with swelling and pain of the right ankle, and fever, and was suspected to have osteomyelitis. Radiographs of the fingers, ankles, and feet, in which pain and swelling were present, revealed multiple pathological fractures. The histological examination of the tissue sample in the right radius showed sequestrated fat necrosis.

Seven years of chronological changes of serum chromium levels after Metasul metal-on-metal total hip arthroplasty.

Although many authors have reported the serum concentrations of metal ions in patients who had metal-on-metal coupling prostheses, most of the studies were not longitudinal, and the follow-up periods were short. We evaluated the longitudinal changes of serum chromium levels in 44 patients who had undergone unilateral metal-on-metal total hip arthroplasty for a minimum of 7 years postoperatively. Although there was a consistent increase in the mean serum chromium level until 3 years after implantation, there was little difference in the levels from years 3 to 7 postoperatively.

Rotational acetabular osteotomy for secondary osteoarthritis after surgery for developmental dysplasia of the hip.

The treatment of residual deformity following surgery for developmental dysplasia of the hip remains controversial. The rationale for the use of the rotational acetabular osteotomy (RAO) is that it increases the weight-bearing area by shifting the osteotomized acetabulum to cover the femoral head. This can improve joint function as well as achieve relief of pain.

Revision of total hip arthroplasty using the Kerboull and KT plates.

We reviewed 42 hips which had undergone revision THA between 1995 and 2005 (the Kerboull plate in 24 hips, and the KT plate in 18 hips). Patients were followed-up for a mean of 7.5 years (range 3-13).

Rotational acetabular osteotomy for advanced osteoarthritis of the hip joint with acetabular dysplasia.

Between August 1986 and July 1997, we performed rotational acetabular osteotomy (RAO) according to the methods of Ninomiya and Tagawa in 161 patients (179 hips). Among them, 63 patients (68 hips) had advanced osteoarthritis. We assessed the outcome at a mean of 12 years after rotational acetabular osteotomy was performed for the treatment of advanced osteoarthritis in a series of patients with acetabular dysplasia.

Rotational acetabular osteotomy for osteonecrosis of the femoral head after intracapsular fracture of the neck of the femur.

The treatment of osteonecrosis of the femoral head in younger patients varies among orthopaedic surgeons. In particular, the optimal treatment of extensive osteonecrosis associated with femoral head collapse remains controversial. Since 1995, we have performed rotational acetabular osteotomy on 70 hips, including those of 3 patients with extensive osteonecrosis of the femoral head after intracapsular fracture of the neck of the femur.

Serum chromium levels before and after revision surgery for loosened metal-on-metal total hip arthroplasty.

We investigated the changes of serum chromium levels before and after revision surgery in 10 patients (1 male and 9 females) who underwent exchange of a metal-on-metal articulation for a metal-on-polyethylene component because of aseptic loosening of a metal-on-metal total hip prosthesis. Of the 10 patients, 2 had bilateral metal-on-metal total hip arthroplasty. In the 8 patients who had no residual metal articulation, the mean serum chromium levels before and after revision surgery were 2.

Changes of D-dimer after total hip arthroplasty in patients with and without intraoperative heparin.

Introduction: Marked activation of thrombosis is common in patients undergoing total hip arthroplasty, especially during reaming of the femur and after insertion of the femoral prosthesis. This suggests that management designed to minimize deep vein thrombosis and fatal pulmonary embolism after total hip arthroplasty should be focused on the period during insertion of the femoral component. In some previous studies, a low dose of heparin administered intraoperatively was shown to suppress the formation of fibrin.

Early failure of modern metal-on-metal total hip arthroplasty using a Wagner standard cup.

In 54 patients (1 man and 53 women), 55 hips underwent primary metal-on-metal total hip arthroplasty (Metasul) with a Wagner standard cup (44-48 mm in outer diameter) and were followed for a minimum of 3 years. All patients received the same type of cementless femoral component (Natural Hip Stem) and femoral head (28 mm in diameter). Twelve (21.

Original methods to move femoral head medially and caudally after rotational acetabular osteotomy: especially to use ceramic spacer.

The operative procedures chosen to treat arthrosis in patients with severe acetabular dysplasia vary among orthopaedic surgeons, particularly in younger patients. We operated on 450 hips with acetabular dysplasia by using the rotational acetabular osteotomy (RAO) method of Ninomiya and Tagawa by Ninomiya (Clin Orthop 247:127-137, 1989). In this report, we describe our technique of performing RAO with hydroxyapatite tricalcium phosphate-composite (HAP-TCP) blocks to achieve good acetabular coverage and the results of this procedure in 16 hips with severe dysplasia, including nine with advanced arthrosis.

Rotational acetabular osteotomy for osteonecrosis with collapse of the femoral head in young patients.

Background: While rotational acetabular osteotomy has been reported to be successful for the treatment of osteoarthritis of the dysplastic hip, little is known about its efficacy in the treatment of osteonecrosis of the femoral head.

Methods: We retrospectively reviewed the results for a consecutive series of twenty-one patients (twenty-five hips) who had undergone rotational acetabular osteotomy between 1995 and 2001 for the treatment of extensive osteonecrosis of the femoral head associated with collapse. All but two of the patients had a history of steroid therapy as part of a treatment regimen for various diseases.

Stress fractures of the femoral neck in child with open capital femoral epiphysis.

Stress fracture of the femoral neck has been considered a typical injury of two age groups: active youths and elderly people with osteoporosis. Its occurrence in children with an open capital femoral epiphysis is rare, and only 11 cases have been reported. Here we report two cases, in a 12-year-old boy and a 5-year-old girl (among the youngest patients on record).

Chronological changes of serum chromium levels after modern metal-on-metal total hip arthroplasty.

We determined changes in serum chromium concentration every 6 months up to 3 years after implantation in 44 patients (mean age 63 (49-79) years, 35 women) who underwent modern metal-on-metal total hip arthroplasty (Metasul). The serum chromium levels increased between the first and second year after implantation (1 year: 1.05 (SD 0.

Radiographic and magnetic resonance imaging findings of polylevolactic acid screws after rotational acetabular osteotomy.

Introduction: Biodegradable polylevolactic acid implants have become more commonly used for the treatment of fractures and osteotomies over the past few years. In the present study, the biocompatibility and degradation of polylevolactide screws used for rotational acetabular osteotomy were assessed on the basis of radiographic and MRI findings.

Materials And Methods: Forty-nine hips of 47 patients were analyzed for this study.

Adult-onset intradural spinal teratoma in the lumbar spine: A case report.

Intradural spinal teratoma is a very rare tumour that can be associated with dysraphic defects. We report a case of adult-onset intradural spinal teratoma in the lumbar spine. The patient was a 54-year-old female who had chief complaints of a gait disturbance.

Comparative study of iliac bone graft and carbon cage with local bone graft in posterior lumbar interbody fusion.

We performed a comparative study of iliac bone graft (the iliac bone group) and carbon cage with local bone graft (the cage group) in PLIF to evaluate the clinical results of both methods. We examined both groups about the operating time, the estimated blood loss, the operative results using the score rating system of Japanese Orthopaedic Association (JOA score), and the presence of bone union on radiography. The operating time and the estimated blood loss of the cage group were statistically less than those of the iliac bone group.