Abstract:
:Background and purpose - Modular-neck hip stems have been identified with corrosion-related problems from the neck-stem junction. We report an ongoing varus deformity of modular-neck hip stems with simultaneous metal ion release observed during a study comparing the migration of modular vs. standard hip stems. Patients and methods - We followed 50 patients with modular and 25 with standard neck stems using radiostereometry (RSA). At 5-year follow-up, we noted a compromised integrity of the modular stem with varus deformity in the neck-stem interface. Changes in head-tip distance as well as whole-blood ion concentration and MRI findings were analyzed. The modular stems were followed further up to 8 years. Results - The head-tip distance decreased continuously by 0.15 mm per year resulting in 1.2 (95% CI 1.0-1.4) mm at 8 years for modular stems, while for the standard stems at 5 years, the decrease was 0.09 (CI 0.0-0.2) mm or 0.02 mm/year. For the modular stems, the reduction in head-tip distance correlated to the increase in whole-blood cobalt concentration at 8 years but not to the MRI grading of tissue reactions. At 5 years, cobalt levels were 4.9 µg/L for modular stems and at 8 years 4.8 µg/L, whereas for standard stems this was 1.0 µg/L. After 8 years, 9 of 72 stems had been revised for different reasons, but only 1 with obvious adverse local tissue reaction (ALTR). Interpretation - We present a surprisingly large progressive deformation at the modular neck-stem junction, but so far without a definite clinical problem. Even the femoral head seems to show slight compression onto the taper over time. A high rate of revisions for the modular type of this stem has raised general concerns, and it has been recalled from the market.
journal_name
Acta Orthopjournal_title
Acta orthopaedicaauthors
Kiernan S,Kaptein B,Flivik C,Sundberg M,Flivik Gdoi
10.1080/17453674.2020.1853387subject
Has Abstractpub_date
2020-12-10 00:00:00pages
1-7eissn
1745-3674issn
1745-3682pub_type
杂志文章abstract::Background and purpose - When nonoperative treatment of proximal humerus fracture (PHF) fails, shoulder arthroplasty may be indicated. We investigated risk factors for revision and evaluated patient-reported outcome 1 year after treatment with either stemmed hemiarthroplasty (SHA) or reverse total shoulder arthroplast...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.1080/17453674.2020.1730660
更新日期:2020-06-01 00:00:00
abstract:BACKGROUND:The etiology of osteoarthritis (OA) is multifactorial and current research attributes it to a complex network of biochemical factors. We attempted to identify important molecules in OA joint destruction. PATIENTS AND METHODS:Synovium was collected from 2 women with hip OA. Total RNA was extracted from the c...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.1080/17453670710014400
更新日期:2007-10-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Following transtibial amputation, a rigid dressing of plaster of Paris has been reported to have advantages over a soft dressing regarding wound healing and reduction of edema, but use of the former may be limited by difficulties in application and in gaining access to the wound. An easily applic...
journal_title:Acta orthopaedica
pub_type: 杂志文章,随机对照试验
doi:10.1080/17453670710015265
更新日期:2008-06-01 00:00:00
abstract:BACKGROUND AND PURPOSE:This randomized study compared clinical results after surgery for posttraumatic shoulder instability with either an anatomical repair or an older, less anatomical but commonly used method. The less anatomical procedure has been considered quicker and less demanding, but it has been questioned reg...
journal_title:Acta orthopaedica
pub_type: 杂志文章,随机对照试验
doi:10.3109/17453670902988345
更新日期:2009-06-01 00:00:00
abstract::Background and purpose - Most guidelines use patient age as a primary decision factor when choosing between osteosynthesis or arthroplasty in displaced femoral neck fractures. We evaluate reoperation and death risk within 1 year after osteosynthesis, and estimate the influence of age, sex, degree of displacement, and ...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.1080/17453674.2019.1698503
更新日期:2020-02-01 00:00:00
abstract::Background and purpose - The additional effects of a continuous adductor canal block (ACB) compared with a single-dose local infiltration anesthesia (LIA) after total knee arthroplasty (TKA) has not been widely researched. Both methods have good effect individually. We hypothesized that a continuous ACB added to a sin...
journal_title:Acta orthopaedica
pub_type: 杂志文章,随机对照试验
doi:10.1080/17453674.2017.1342184
更新日期:2017-10-01 00:00:00
abstract::Background and purpose - About one-fourth of hip fracture patients have cognitive impairment. We investigated whether patients' cognitive function affects surgical treatment, risk of reoperation, and mortality after hip fracture, based on data in the Norwegian Hip Fracture Register (NHFR).Patients and methods - This p...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.1080/17453674.2019.1709712
更新日期:2020-04-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Deep vein thrombosis is common after total joint replacement. It is frequently asymptomatic, and it is unclear whether this leads to longer-term problems such as post-thrombotic syndrome and leg ulceration. We investigated whether the postoperative prevalence of ulceration in patients who had und...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.3109/17453674.2011.596064
更新日期:2011-08-01 00:00:00
abstract:BACKGROUND AND PURPOSE:We have previously reported that the first 10 years of hip arthroplasty in Lithuania resulted in a higher cumulative revision rate than that observed in Sweden. We thus compared the corresponding results after introduaction of total knee replacement in Lithuania. METHODS:The 10-year revision rat...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.1080/17453670902804984
更新日期:2009-02-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Most patients with femoroacetabular impingement (FAI) have a cam deformity, which may be quantified by measuring the alpha angle and anterior offset ratio (AOR). Knowledge of what constitutes a "normal" alpha angle and AOR is limited. We defined the reference intervals of these measurements from ...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.3109/17453671003619011
更新日期:2010-02-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Cementless total hip arthroplasty is currently favored by many orthopedic surgeons. The design of the porous surface is critically important for long-term fixation. We examined the clinical and radiographic outcome of the cementless titanium hip implant with a bottom coating of apatite-wollastoni...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.3109/17453674.2012.736173
更新日期:2012-12-01 00:00:00
abstract:BACKGROUND:The coronal alignment of the lower limb is important for knee reconstruction procedures. However, normal alignment is hard to define because of its wide variation among normal individuals. Our hypothesis was that the variation in the normal anatomy as assessed by radiography is greater than commonly accepted...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:
更新日期:2005-06-01 00:00:00
abstract::Perspective Orthopaedic training in the United Kingdom has changed little from the Halstedian apprenticeship model of graduated responsibility, with the mantra "see one, do one, teach one". Whilst still relevant in surgical teaching, the current and ongoing disruption to surgical training secondary to the coronavirus ...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.1080/17453674.2020.1845437
更新日期:2020-11-11 00:00:00
abstract::Background and purpose - A 2-stage revision is the most common treatment for late deep prosthesis-related infections and in all cases of septic loosening. However, there is no consensus about the optimal interval between the 2 stages. Patients and methods - We retrospectively studied 120 deep infections of total hip (...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.3109/17453674.2016.1142305
更新日期:2016-08-01 00:00:00
abstract::Background and purpose - The uncemented Symax hip stem has shown early proximal ingrowth as result of the BONIT-hydroxyapatite (HA) coating and the distal DOTIZE surface treatment. We evaluated 2-year postoperative radiostereometric analysis (RSA) migration of the Symax hip stem in THA patients. We also investigated t...
journal_title:Acta orthopaedica
pub_type: 杂志文章,随机对照试验
doi:10.1080/17453674.2019.1709956
更新日期:2020-04-01 00:00:00
abstract:BACKGROUND:When surgical treatment of dysplastic hip osteoarthrosis is necessary, osteotomy is preferable to fusion or THR. We evaluated periacetabular osteotomy as a method of choice. PATIENTS AND METHODS:We treated 36 symptomatic dysplastic hip joints (32 patients) with the Bernese periacetabular osteotomy (PAO) bet...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.1080/00016470510030346
更新日期:2005-02-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Multimodal techniques can aid early rehabilitation and discharge of patients following primary joint replacement. We hypothesized that this not only reduces the economic burden of joint replacement by reducing length of stay, but also helps in reduction of early complications. PATIENTS AND METHO...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.3109/17453674.2011.618911
更新日期:2011-10-01 00:00:00
abstract:BACKGROUND AND PURPOSE:We have previously shown that during the first 2 years after total hip arthroplasty (THA), periprosthetic bone resorption can be prevented by 6 months of risedronate therapy. This follow-up study investigated this effect at 4 years. PATIENTS AND METHODS:A single-center, double-blind, randomized ...
journal_title:Acta orthopaedica
pub_type: 杂志文章,随机对照试验
doi:10.3109/17453674.2015.1041846
更新日期:2015-01-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Optical coherence tomography (OCT) is a light-based imaging technique suitable for depiction of thin tissue layers such as articular cartilage. Quantification of results and direct comparison with a reference standard is needed to confirm the role of OCT in cartilage evaluation. MATERIALS AND ME...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.3109/17453674.2014.979312
更新日期:2015-04-01 00:00:00
abstract:BACKGROUND AND PURPOSE:The PRECICE intramedullary limb lengthening system uses a new technique with a magnetic rod and a motorized external remote controller (ERC) with rotational magnetic field. We evaluated the reliability and safety of the PRECICE system. METHODS:We compared our preliminary results with PRECICE in ...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.3109/17453674.2014.913955
更新日期:2014-06-01 00:00:00
abstract::Background and purpose - The treatment of patients between 55 and 70 years with displaced intracapsular femoral neck fracture remains controversial. We compared internal fixation (IF), bipolar hemiarthroplasty (HA) and total hip arthroplasty (THA) in terms of mortality, reoperations and patient-reported outcome by usi...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.1080/17453674.2017.1376514
更新日期:2018-02-01 00:00:00
abstract::- Knee pathologies including focal cartilage injuries, osteoarthritis (OA), and ligament injuries are common. The poor regeneration and healing potential of cartilage has led to the search for other treatment modalities with improved healing capacity. Furthermore, with an increasing elderly population that desires to ...
journal_title:Acta orthopaedica
pub_type: 杂志文章,评审
doi:10.1080/17453674.2017.1368899
更新日期:2017-12-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Ultrasound is used for imaging of pseudotumors associated with metal-on-metal (MoM) hips. Ultrasound has been compared with magnetic resonance imaging, but to date there have been no studies comparing ultrasound findings and revision findings. METHODS:We evaluated the sensitivity and specificity...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.3109/17453674.2014.1001970
更新日期:2015-06-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Hospital volume has been suggested to be one of the best indicators of adverse orthopedic events in patients undergoing THR surgery. We therefore evaluated the effect of hospital volume on the length of stay, re-admissions, and complications of THR at the population level in Finland. METHODS:30,...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.3109/17453674.2010.533930
更新日期:2011-02-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Rotational osteotomies are usually necessary to correct pronounced rotational deformities in ambulant children with cerebral palsy. The effects of soft tissue surgery on such deformities are unclear. In this retrospective study, we determined whether multilevel soft tissue surgery, performed to c...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.3109/17453671003587135
更新日期:2010-04-01 00:00:00
abstract:BACKGROUND:Treatment of fractures of the humeral head remains controversial. We reviewed the outcome of our treatment of 2- and 3-part fractures of the proximal humerus using external fixation as a way of preventing damage to the vascularity of the humeral head and of reducing the risk of infection associated with open...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.1080/17453670610046028
更新日期:2006-04-01 00:00:00
abstract:BACKGROUND AND PURPOSE:In recent years several different plate designs for internal fixation of fractures of the distal radius have been developed. However, few biomechanical studies have been performed to compare these new implants. The purpose of this study was to compare the mechanical properties of 5 different comm...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.3109/17453670902947440
更新日期:2009-04-01 00:00:00
abstract::Background and purpose - The long-term outcome of pin-fixed supracondylar humerus fractures (SCHF) in children is not well known. We assessed the 7- to 12-year outcome in 168 children. Patients and methods - During 2002-2006, 210 domestic children (age 7 (1-14) years) with SCHF (Gartland III 79%, Gartland II 19%, and ...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.1080/17453674.2018.1438765
更新日期:2018-06-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Surgical correction of foot deformities as part of single-event multilevel surgery (SEMLS) to optimize postoperative training is sometimes indicated in ambulatory children with cerebral palsy. We have, however, experienced excessive postoperative pain and rehabilitation problems in a number of th...
journal_title:Acta orthopaedica
pub_type: 杂志文章
doi:10.3109/17453674.2014.960141
更新日期:2014-12-01 00:00:00
abstract:BACKGROUND AND PURPOSE:In unstable distal radial fractures that are impossible to reduce or to maintain in reduced position, the treatment of choice is operation. The type of operation and the choice of implant, however, is a matter of discussion. Our aim was to investigate whether open reduction and internal fixation ...
journal_title:Acta orthopaedica
pub_type: 杂志文章,随机对照试验
doi:10.3109/17453670903171875
更新日期:2009-08-01 00:00:00