Physical therapy(PT) is an integral component in the management of musculoskeletal conditions. On the other hand, there have been few reports exclusively dedicated to studying PT interventions on the same day of total hip arthroplasty(THA). In this study, we investigate the role of rehabilitation in the early postoperative period on length of stay (LOS), total medical cost, and physical recovery following total hip arthroplasty. A prospective cohort study was carried out 104 consecutive patients who underwent 107 primary THA performed by two surgeons. Data were gathered on all patients who underwent operative management from June2016 to June 2017. Institutional review board approval was obtained before performing this study. Patient demographic, physical, and clinical dates were collected for all patients, including age, gender, body mass index (BMI), diagnosis, Japan Orthopedic Association (JOA) hip score, Japanese Orthopedic Association Hip-Disease Evaluation Questionnaire (JHEQ) score, 3min walk test, and Timed up and go (TUG) test. The patient population consisted of 5men and 99women, with an average age of 66.0 years (range, 50–84 years). There were no statistically significant differences between patients who did and did not receive PT with regard to demographic, medical, and surgical data, including gender, age, BMI, JOA hip score, JHEQ score, preoperative 3min walk test, preoperative TUG test(Table 1). All patients underwent direct anterior approach THA through navigation system. Postoperative day (POD) 0 was defined as the same day of surgery. There were no standardized criteria by which patients were selected for participation in rehabilitation with physical therapists. Patient selection for POD 0 rehabilitation was based on the end of surgery time. For instance, when the end of surgery time was in the forenoon, the patients were received POD 0 PT. In contrast, patients who ended operation in the afternoon were classified POD 1 PT. Rehabilitation protocol was adjusted based on surgical approach, and all patients were weight bearing as tolerated. TUG test and 3min walk test was done by a physiotherapist on the seventh day postoperatively.INTRODUCTION
METHODS
In gap balancing technique, we decided the femoral component rotation according to the ligament balance in flexion. Component and limb alignment are important considerations during TKA. Three-dimensional positioning of TKA implants and exact mechanical axis has an effect on implant loosening, polyethylene stresses, and gait. According to the recent report, the navigation system made it possible to achieve aligned implants more than conventional TKA. Hybrid Navigation technique which is our procedure is combination of navigation system and modified gap technique. In other words, exact mechanical axis is gained by navigation system, stable stability of knee joint is gained by modified gap technique. The purpose of this study is to carry out clinical evaluation and image evaluation of the patients who underwent hybrid navigation technique TKA.INTRODUCTION
PURPOSE
Soft-tissue balancing of the knee is fundamental to the success of total knee arthroplasty(TKA). Preparing rectangular extension and flexion joint gaps in the most important goal in TKA, because it facilitates functional stability of the knee. In gap balancing technique, we decided the femoral component rotation according to the ligament balance in flexion. Component and limb alignment are important considerations during TKA. Three-dimensional positioning of TKA implants and exact mechanical axis has an effect on implant loosening, polyethylene stresses, and gait. According to the recent reports, the navigation system made it possible to achieve aligned implants more than conventional TKA. Hybrid Navigation technique which is our procedure is combination of navigation system and modified gap technique. In other words, exact mechanical axis is gained by navigation system, stable stability of knee joint is gained by modified gap technique. The purpose of this study is to carry out clinical evaluation and image assenssment using computed tomography (CT) of the patients who underwent hybrid navigation technique TKA.INTRODUCTION
PURPOSE
Instability following total hip arthroplasty (THA) is an unfortunately frequent and serious problem that requires through evaluation and preoperative planning before surgical intervention. Prevention through optimal index surgery is of great importance, as the management of an unstable THA is challenging even for an experienced joints surgeon. However, even after well-planned surgery, a significant incidence of recurrent instability still exists. As you know Sir John Charnley is one of the first orthopaedic surgeons to address the issue of soft-tissue tensioning (STT) in the THA. Moreover leg-length discrepancy (LLD) after THA can pose a substantial problem for the orthopaedic surgeon. Such discrepancy has been associated with complications including nerve palsy, low back pain, and abnormal gait. The objective of this study is to assess hip instability of three different FOs in same patient undergoing THA during an operation. We performed 70 patients who had undergone unilateral THA using CT based navigation system at a single institution for advanced osteoarthoritis from May 2013 to May 2014. We used postero-lateral approach in all patients. After cup and stem implantation, we assessed soft tissue tensioning in THA during operation. Trial necks were categorized into one of three groups: standard femoral offset (sFO), high femoral offset (hFO, +4mm compared to sFO) and extensive high femoral offset (ehFO, +8 mm compared to sFO). We measured distance of lift-off about each of three femoral necks using CT based navigation system and a force gauge with hip flexed at 0 degrees and 30 degrees under a traction of lower extremity. Traction force was 40% of body weight.Purpose
Methods
The alumina on alumina articulation in THA has induced less macrophage reaction and cytokine section than polyethylene bearings. Thus THA using alumina on almina articulation has induced little periprosthetic osteolysis. However alumina fracture is still a concern. We had underwent 100 THAs that it was a cemented polyethylene backed acetabular component with an alumina inlay(ABS Cup; Kyocera, Kyoto, Japan), PHS stem(Kyocera) and 28mm alumina femoral head. This system was formerly used in only Japan, over 10 years results have not reported yet. We retrospectively reviewed 94 patients(100 hips) with cemented alumina on alumina THAs to identify factors relating to alumina failure, and to evaluate mid-term(>10years) results. 16 patients died from unrelated causes within 10 years of the operation and 14 patients was lost to follow up. The remaining 70 patients(79 Hips) were evaluated after a mean follow-up of 10 years. We performed clinical evaluation using the JOA score, and radiological evaluation was performed that inclination and anteversion angle of cup measurement with 2D template system at anteroposterior radiograph. On the radiographs at the final examination, radiolucency and osteolysis were evaluated around the acetabular component, and around the femoral component. These evaluations were scheduled for 3,6,9, and 12 months and yearly thereafter. All the operations were performed by same surgeon, at same center. Cumulative survival rates were calculated using the Kaplan-Meier method with failure defined as the end point of revision for alumina failure or for any reason. To compare groups with and without alumina failures in age, BMI, gender, activity, function, abduction angle, size of component, or existence of radiolucent lines, we used the nonparametric Mann-Whitney U-test. The mean age of the patients at surgery was 63.0 years. The mean follow up term was 13.8 years. Inclination and anteversion mean angle of cup were 45.6°and 14.2°.ã��Revision surgery was performed because of alumina inlay failure in 4hips(2 fractures and 2 dissociation;5.1%), loosening in 2 hips(2 cup loosenings; 2.5%) recurrent dislocation in 1 hip, and femoral fracture in 1 hip, no deep infection and DVT. The 10-year survival rate was 92.4% with revision for any reason and 95.9% with revision for alumina failure as the end point. We detected 3 ceramic failures at a mean of 8.9 years(4.1ï¼ï¿½12.5) after the index operation. There were no differences in BMI, function, cup angles(inclination and anteversion), and cup loosening among the 4hips with alumina failure. But there were differences in age, gender, and activity with alumina failure. This alumina on alumina THA yielded passably mid-term results, but it was occurred a high rate of catastrophic alumina inlay failure. In July 2000, we discontinued use of this type of THA to avoid alumina failure. This ABS cup was banned in 2002, because of numerous alumina failures. We suggest all patients with this type of acetabular component be followed carefully. Cemented polyethylene-backed alumina-on-alumina THA with a composite of alumina inlay had a relatively high rate of catastrophic alumina inlay failure(5.1ï¼ï¿½) during a mean of 13.8 years' follow up. There were differences in age, gender, and activity with alumina failure.
There are few reports on total hip arthroplasty (THA) for hip osteoarthritis associated with so-called Perthes-like change including high great trochanter, short neck hip or flattened femoral head (hereinafter called “Perthes-like change”) as the operative procedures are difficult. We studied THA for “Perthes-like change” carried out in our department. We covered 14 cases (15 hips), which underwent THA for “Perthes-like change” (hereinafter called “Perthes-like change group,” operated from 2008 to September 2011. The average age at the operation was 62 (53 to 83 years old), 7 males and 7 females, and the average follow-up period was 21.8 months (6 to 48 months). For these cases we studied the clinical items and further made a comparative review of the 258 hips as a control group (Group C), which underwent THA during the same period for osteoarthritis (OA) originating in DDH (developmental dysplasia of the hip) (Crowe type 1 and 2), excluding the “Perthes-like change group.” The items reviewed include the age at the operation, operation time and intraoperative blood loss.Objectives
Methods
