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Abstract Objectives To identify highly-ranked features related to clinicians' diagnosis of clinically relevant knee osteoarthritis (OA). Methods General practitioners (GPs) and secondary care physicians (SPs) were recruited to evaluate 5-10 years follow-up clinical...

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Abstract PURPOSE: Meniscus tears are one of the most frequent orthopedic knee injuries, which are currently often treated performing meniscectomy. Clinical concerns comprise progressive degeneration of the meniscus tissue, a change in knee biomechanics, and an early...

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Abstract Background: Anterior cruciate ligament (ACL) rupture is a very common knee injury in the sport active population. There is much debate on which treatment (operative or non-operative) is best for the individual patient. In order to give a more personalized...

Abstract Background: Diagnosing anterior cruciate ligament (ACL) injuries in children and adolescents are more challenging compared to adults. Delayed diagnosis may result in meniscal or chondral injuries. The aim of this study was to deter- mine the diagnostic values...

Abstract OBJECTIVE: To compare outcomes from arthroscopic partial meniscectomy versus physical therapy in young patients with traumatic meniscal tears. METHODS: We conducted a multicentre, open-labelled, randomised controlled trial in patients aged 18-45 years, with a...

Abstract Purpose: To evaluate the effectiveness of a tailored intervention to reduce low value MRIs and arthroscopies among patients ≥ 50 years with degenerative knee disease in 13 Dutch orthopaedic centers (intervention group) compared with all other Dutch...

Abstract Background: Early diagnosis of knee osteoarthritis (OA) is important in managing this disease, but such an early diagnostic tool is still lacking in clinical practice. The purpose of this study was to develop diagnostic models for early stage knee OA based on...

Integration of an implant with the surrounding tissue is a major challenge in cartilage regeneration. It is usually assessed with in vivo animal studies at the end-stage of implant development. To reduce animal experimentation and at the same time increase screening...

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Abstract Purpose The purpose of this study was to assess in which proportion of patients with degenerative knee disease aged 50+ in whom a knee arthroscopy is performed, no valid surgical indication is reported in medical records, and to explore pos- sible...

Abstract Objective: Osteoarthritis (OA) is a chronic joint disease characterized by progressive degradation of cartilage. It affects more than 10% of the people aged over 60 years-old worldwide with a rising prevalence due to the increasingly aging population. OA...

After anterior cruciate ligament (ACL) rupture, reconstructive surgery with a hamstring tendon autograft is often performed. Despite overall good results, ACL re-rupture occurs in up to 10% of the patient population, increasing to 30% of the cases for patients aged...

The purpose of this investigation was to evaluate systematically the literature concerning biopsy, MRI signal to noise quotient (SNQ) and clinical outcomes in graft-maturity assessment after autograft anterior cruciate ligament reconstruction (ACLR) and their possible...

Abstract Objectives: Although there is a general focus on early diagnosis and treatment of hip osteoarthritis, there are no validated diagnostic criteria for early-stage hip OA. The current study aimed to take the first steps in developing diagnostic criteria for...

Abstract: Objective: The purpose of this study was to evaluate the added value of radiographs for diagnosing knee osteoarthritis (KOA) by general practitioners (GPs) and secondary care physicians (SPs). Methods: Seventeen GPs and nineteen SPs were recruited to...

Abstract Objective Sodium concentration is responsible for (at least part of) the stiffness of articular cartilage due to the osmotic pressure it generates. Therefore, we hypothesized that we could use sodium MRI to approximate the stiffness of cartilage to assess...

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Abstract Background: Physiotherapy is a proven effective treatment strategy after total knee and hip arthroplasty (TKA/THA), however there is considerable practice variation regarding its timing, content and duration. This study aims to compare the (cost-)...

Abstract To reduce animal experimentation and to overcome translational issues in cartilage tissue engineering, there is a need to develop an ex vivo human tissue-based approach. This study aims to demonstrate that a human osteochondral explant at different...

Abstract Purpose: Upon anterior cruciate ligament (ACL) rupture, reconstruction is often required, with the hamstring tendon autograft as the most widely used treatment. Post-operative autograft remodeling enhances the risk of graft rupture, which occurs in up to...

Abstract BACKGROUND:  One of the main determinants of treatment satisfaction after total knee arthroplasty (TKA) is the fulfillment of preoperative expectations. For optimal expectation management, it is useful to accurately predict the treatment result. Multiple...

Abstract The management of anterior cruciate ligament (ACL) injuries in the skeletally immature patient is an area of controversy. The purpose of this survey is to inventory the current state of care for pediatric ACL injuries in the Netherlands. This survey was...

Abstract PURPOSE:  The purpose of this study was to assess which factors were associated with the implementation of "Choosing Wisely" recommendations to refrain from routine MRI and arthroscopy use in degenerative knee disease. METHODS: ...

Abstract Unfulfilled preoperative expectations have a strong influence on the outcome after total knee arthroplasty (TKA). More insight into determinants of the level of expectations is useful in identifying patients at risk for having expectations of the treatment...

Abstract BACKGROUND:  The Pedi International Knee Documentation Committee (IKDC) and Knee Injury and Osteoarthritis Outcome Score (KOOS) child are validated questionnaires for children with knee disorders. The aim of this study was to translate these...

Abstract Background and purpose - Improvement of physical function is one of the main treatment goals in severe hip osteoarthritis (OA) patients. The Osteoarthritis Research Society International (OARSI) has identified a core set of performance-based tests to assess...

Abstract Background: One out of five patients is unsatisfied to some extent after total knee arthroplasty (TKA). Unmet expectations are the main driver of post-operative dissatisfaction. Improved pre-operative education on realistic expectations for long-term...

Abstract  Purpose The Osteoarthritis Research Society International has identi ed a core set of performance-based tests of physi- cal function for use in people with knee osteoarthritis (OA). The core set consists of the 30-second chair stand test (30-s...

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Abstract PURPOSE:  To determine the face and construct validity as well as educational value and user-friendliness of the Simendo knee arthroscopy virtual reality simulator. METHODS:  Sixty participants were recruited and equally divided into novices (0...

Abstract Introduction The rate of satisfaction after total knee arthroplasty (TKA) is consistently reported around 80%, leaving 1 in 5 patients unsatisfied to some extent. Fulfillment of expectations is reported as the strongest predictor of treatment satisfaction. In...

The Pellegrini-Stieda lesion is a calcification on the medial side of the knee. The origin of this tissue is controversial. The purpose of our study is to investigate the origin of the Pellegrini-Stieda lesion using conventional radiography as to recreate the...

ABSTRACT OBJECTIVE: To investigate the clinical outcomes after hamstring tendon autograft ACL reconstruction with accelerated, brace-free rehabilitation. DESIGN: Systematic review according to PRISMA guidelines. DATA SOURCES: Embase, Medline Ovid, Web...

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AIMS: The aim of this study was to assess the current available evidence about when patients might resume driving after elective, primary total hip (THA) or total knee arthroplasty (TKA) undertaken for osteoarthritis (OA). MATERIALS AND METHODS: In February 2016,...

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  ABSTRACT Purpose: Prediction of hamstring tendon autograft size facilitates preoperative planning of knee ligament surgery and may reduce the need for allografts in complex knee reconstructions. The aim of this study was to analyze whether length and diameter...

E-learning module for physiotherapists on anterior cruciate ligament anatomy, diagnosis, rehabilitation and return to sports (Dutch only).

This article describes the role of gait analysis and gait training in the treatment of patients with osteoarthritis based on international guidelines. It is the first piolt study of PhD students J. Tolk and F. Brooymans on gait in osteoarthritis. 

Purpose: A review is provided on the existing knowledge about the specific healing phases of the intra-articular hamstring tendon graft used for ACL reconstruction. Differences between human and animal in-vivo studies are explained and implications for the...

Preoperative planning in total knee arthroplasty with intramedullary guiding systems requires the measurement of the femoral mechanical–anatomical angle (FMAA) for optimal alignment correction. The main goal of this study was to assess the agreement between two...

In 2012, the National Anterior Cruciate Ligament Committee was founded. RPA Janssen M.D., represented the Dutch Orthopaedic Society (NOV) in this committee. Other participating partners were the Dutch Arthroscopy Society (Nederlandse Vereniging voor...

The journal Physios has invited RPA Janssen to write a review article on the subject of anterior cruciate ligament and knee osteoarthritis. Physios is an independent journal with e-learning credits. The article is only available in Dutch.

An 8 year old boy ruptures his anterior cruciate ligament in sports. MRI demonstrates the lesion. He is treated conservatively with a brace. At the age of 14, MRI shows an anatomic healing of the anterior cruciate ligament. He has no more subjective nor objective...

The study has been awarded Best Poster Award MMC 2011 (see Archives: March 4th, 2011). Out of a consecutive series, 50 conventional TKA were compared with 50 computer assisted TKA.. Except for the use of CAS, all peri- and postoperative interventions were comparable....

Development of a new evidence-based clinical practice guidelines for treatment of "Acute Knee Injury". The latest insights and scientific evidence is provided by leading knee specialists and physiotherapists in the Netherlands. 

Analysis of long leg alignment as well as tibial slope after minimal invasive total knee arthroplasty (MIS-TKA) comparing intra- and extramedullary minimal invasive surgery (MIS) tibia instrumentation (Genesis II, Smith & Nephew, Memphis, USA). A prospective...

The primary aim of the study was to evaluate the range of motion and complications after Genesis II total knee arthroplasty with high flexion tibia insert (TKA-HF). Furthermore, difference in knee flexion between high flexion and standard inserts was compared. The...

This is a joint research project between Máxima Medical Center Eindhoven (The Netherlands) and Charité University Hospital Berlin (Germany). Remodelling of human hamstring tendons after anterior cruciate ligament (acl) reconstructions by histological analysis. 67...

Prospective analysis of regeneration of gracilis and semitendinosis tendons after anterior cruciate ligament reconstruction. MRI is performed préoperatively and at 2 weeks, 6 and 12 months postsurgery. The gracilis tendon regenerated in all 22 patients. The...

Purpose: Analysis of long-term clinical and radiological outcome after anterior cruciate ligament (ACL) reconstruction with special attention to knee osteoarthritis and its predictors. Methods: A prospective, consecutive case series of 100 patients. Arthroscopic...

Gentamycin beads are used for muskuloskeletal infections. Gentamycin is released gradually from the beads, and high gentamycin concentrations are achieved only locally. Side effects of gentamycin are rarely to be expected with gentamycin beads since only low amounts...

We present the first case of late spontaneous dislocation of a high flexion polyethylene insert after Genesis II total knee arthroplasty. Dislocation of the fixed insert occurred at 14 months post surgery while walking down a steep aircraft staircase. The total knee...

A tragic airplane crash in 1976 has led to the development of the Advanced Trauma Life Support (ATLS): the current golden standard for the treatment of trauma patients in the acute phase. The founding father of the ATLS, orthopaedic surgeon James K. Styner, has...

We present a case of a 47 year old man with persistent neck complaints after a ski accident. Diagnosis is dislocated fractures of the spinal processes of C6 and C7. The radiological work-up is illustrated.

Arterial complications after anterior cruciate ligament reconstruction (ACLR) are rare. We present a case report of a 44 year old male patient with a subtotal occlusion of the popliteal artery 17 days after anterior cruciate ligament reconstruction. Embolectomy and...

Objective: Ankle sprain is the most frequently occurring acute injury in tennis, accounting for 20–25% of all injuries. In the current paper, we assess the cause of ankle sprain and suggest possibilities to be considered during diagnosis. Methods: We assessed a...

Arterial complications after anterior cruciate ligament (ACL) reconstruction are rare. We present a case report of a 50 year old female patient with simultaneous pseudoaneurysm and thrombosis of the popliteal artery after anterior cruciate ligament reconstruction. The...

We report a case of fatal pulmonary embolus in a consecutive series of 625 anterior cruciate ligament reconstructions. An analysis of the predisposing factors is presented as well as a literature review of thromboprophylaxis in anterior cruciate ligament...

Radial head dislocations usually occur in combination with ulna fractures (Monteggia fracture). Dislocation of the radial head is to anterior, lateral or posterior. However, dislocations may be isolated lesions; usually in children betwen 2-7 years of age with an...

We present a case report of a pseudoaneurysm of the popliteal artery after anterior cruciate ligament reconstruction using a bicortical tibial screw fixation 12 days after surgery. Surgical exploration and repair of an intimal lesion of the popliteal artery was...

We reviewed 21 patients with Mason type-III fractures of the radial head treated by resection, evaluating the results at 16-30 years by a standard questionnaire and clinical and radiological examination of the elbow and wrist. Seventeen patients had an excellent...

Immobilisation of the cervical spine is mandatory in the adequate primary survey of a trauma patient. This principle is part of the Advanced Trauma Life Support (ATLS) program. The ATLS course is part of the training of surgical and orthopedic residency programs. We...

In our trauma department, pertrochanteric femoral fractures with inherent stability are treated by either a DHS (Dynamic Hip Screw) or Gamma nail osteosynthesis. There are specific indications for both implants. However, a grey area seems to exist where both implants...

Ulna fractures with dislocation of the radial head are rare injuries. They constutute less than 5% of all fractures of the upper extremity. We describe a case with an ulnar fracture, dislocation of the radial head and simultaneous fracture of the olecranon. The trauma...