Michel van den Bekerom

OLVG · Department of Orthopaedics

Purpose: To review athletes’ reasons not to return to sport (RTS) after surgical treatment of anterior shoulder instability, comparing capsulolabral repair and bony reconstruction procedures. The hypothesis is that the most common reason for patients unable to RTS is not due to physical inability of the shoulder. Methods: A systematic review was pe...

Introduction The effectiveness of rotator cuff tear repair surgery is influenced by multiple patient-related, pathology-centred and technical factors, which is thought to contribute to the reported retear rates between 17% and 94%. Adequate patient selection is thought to be essential in reaching satisfactory results. However, no clear consensus ha...

Background: Even though many studies have been published regarding return to sport (RTS) rates following arthroscopic Bankart repair (ABR), evidence regarding prognostic factors for which patient do not RTS is limited. The aim of this study was to identify prognostic factors that are associated with failure to RTS and failure to RTPS following pri...

Aims: This study aimed to answer the following questions: do 3D-printed models lead to a more accurate recognition of the pattern of complex fractures of the elbow?; do 3D-printed models lead to a more reliable recognition of the pattern of these injuries?; and do junior surgeons benefit more from 3D-printed models than senior surgeons? Methods:...

PurposeBone augmentation techniques show a relatively high complication rate, which might be due to graft non-union and resorption. It is unclear which augmentation techniques demonstrate the highest amount of non-union and resorption and whether this leads to worse clinical or functional outcomes. Therefore, the aim of this review was (i) to compa...

Background Acromioclavicular dislocations with a concomitant fracture of the coracoid process are rare and there is ambiguity on treatment options . This systematic review was performed to address the clinically relevant question: what are the shoulder functions, union rates, and expected time until return to daily life in patients with a dislocati...

Background Distinguishing a complete from a partial distal biceps tendon rupture is essential, as a complete rupture may require repair on short notice to restore function, whereas partial ruptures can be treated nonsurgically in most cases. Reliability of physical examination is crucial to determine the right workup and treatment in patients with...

(400/400 words) Background On-track lesions with a short distance from the medial edge of the Hill-Sachs lesion to the medial edge of the glenoid track (nearly off-track) may predispose recurrence following arthroscopic Bankart repair (ABR) in the general population. The aim of this study was to determine if a shorter distance between the medial e...

on behalf of the Science of Variation Group § Purpose Stable fixation of distal humerus fracture fragments is necessary for adequate healing and maintenance of reduction. The purpose of this study was to measure the reliability and accuracy of interpretation of postoperative radiographs to predict which implants will loosen or break after operative...

Introduction Shoulder instability is a common injury, with a reported incidence of 23.9 per 100 000 person-years. There is still an ongoing debate on the most effective treatment strategy. Non-operative treatment has recurrence rates of up to 60%, whereas operative treatments such as the Bankart repair and bone block procedures show lower recurrenc...

Introduction It is unclear if the collar and cuff treatment improve alignment in displaced surgical neck fractures of the proximal humerus. Therefore, this study evaluated if the neckshaft angle and extent of displacement would improve between trauma and onset of radiographically visible callus in non-operatively treated surgical neck fractures (Bo...

Objective Radiographic osteoarthritis of the acromioclavicular joint (ACJ OA) is a common incidental finding and an uncommon reason for people to seek care for shoulder symptoms. We reviewed the published evidence regarding the age-specific prevalence of ACJ OA to establish the base rate of pathophysiology. Methods A total of 10 studies including...

Background: In LE (Lateral Epicondylitis) otherwise known as Tennis Elbow, the Extensor Carpi Radialis Brevis (ECRB) tendon is most commonly involved. In the majority of studies, injections are performed with a lack of standardization. The Instant Tennis Elbow Cure (ITEC) device has been developed to perform reproducible and standardized perforati...

Background: Pediatric supracondylar humerus fractures (pSCHFs) may be challenging injuries to treat because of the potential residual deformity. There is debate regarding the technical aspects of adequate closed reduction and crossed Kirschner wire (K-wire) fixation. Purpose: Do surgeons have an agreement on the aspects of the fixation of pSCHFs...

Background There is uncertainty with regard to the optimal revision procedure after failed labral repair for anterior shoulder instability. An overview of outcomes of these procedures with quantitative analysis is not available in literature. The aim of this review is 1) to compare recurrence rates after revision labral repair (RLR) and revision bo...

Purpose Magnetic resonance imaging (MRI) is used widely for complete ruptures of the distal biceps tendon. The validity of this investigation for bicipital bursitis and tendinosis is unknown. The purpose of present study was to assess the prevalence of incidental (asymptomatic) signal changes in the distal biceps tendon in patients who underwent MR...

Purpose: The extent of shoulder instability and the indication for surgery may be determined by the prevalence or size of associated lesions. However, a varying prevalence is reported and the actual values are therefore unclear. In addition, it is unclear whether these lesions are present after the first dislocation and whether or not these lesion...

Background As nonoperative treatment of Neer type II distal clavicle fractures is associated with nonunion rates up to 33%, operative treatment is frequently advocated. However, evidence is lacking regarding which operative treatment to perform and whether this is superior to nonoperative treatment in terms of functional outcome and complication ra...

A visible mass around the sternoclavicular (SC) joint may be explained by a wide variety of diagnoses, each with its own diagnostic pathway and treatment options. Here we report three cases: a 56-year-old male with an anterior luxation of the right SC joint, a 59-year-old male with osteomyelitis of the left SC joint and a 78-year-old male with a pa...

Aims The aim of this study was to investigate whether on-demand removal (ODR) is noninferior to routine removal (RR) of syndesmotic screws regarding functional outcome. Methods Adult patients (aged above 17 years) with traumatic syndesmotic injury, surgically treated within 14 days of trauma using one or two syndesmotic screws, were eligible (n =...

Background The clinical diagnosis of partial distal biceps tendon ruptures or tendinosis can be challenging. Three clinical tests have been described to aid in an accurate and timely diagnosis: the biceps provocation test, the TILT sign and the resisted hook test. However, not much is known about the sensitivity, specificity and inter-rater reliabi...

Background: There is an ongoing debate about whether to perform operative or nonoperative treatment following a first-time anterior dislocation or wait for recurrence before operating. The aim of this systematic review is to compare recurrence rates following operative treatment following first-time anterior dislocation (OTFD) with recurrence rate...

Background: Reliably recognizing the overall pattern and specific characteristics of proximal humerus fractures may aid in surgical decision-making. With conventional onscreen imaging modalities, there is considerable and undesired interobserver variability, even when observers receive training in the application of the classification systems used...

Purpose Determining the risk of recurrent instability following an arthroscopic Bankart repair can be challenging, as numerous risk factors have been identified that might predispose recurrent instability. However, an overview with quantitative analysis of all available risk factors is lacking. Therefore, the aim of this systematic review is to ide...

Background: The incidence of triceps insufficiency after total elbow arthroplasty (TEA) varies in the literature, and a consensus on treatment strategy is lacking. We review the incidence, the risk factors, the clinical presentation, and the diagnosis and treatment of triceps insufficiency after TEA. Based on this information, we have formulated r...

Background: Our aim is to determine the interobserver reliability for surgeons to detect Hill-Sachs lesions on magnetic resonance imaging (MRI), the certainty of judgement, and the effects of surgeon characteristics on agreement. Methods: Twenty-nine patients with Hill-Sachs lesions or other lesions with a similar appearance on MRIs were present...

Background: Injection therapy around the distal biceps tendon insertion is challenging. This therapy may be indicated in patients with a partial distal biceps tendon tear, bicipitoradial bursitis and tendinopathy. The primary goal of this study was to determine the accuracy of manually performed injections without ultrasound guidance around the bi...

Background: New surgical approaches have been developed to optimise elbow function after total elbow arthroplasty (TEA). Currently, there is no consensus on the best surgical approach. This study aims to investigate the functional outcomes, prosthetic component position and complication rates after a triceps-sparing and a triceps-detaching approac...

Background and purpose: Humeral shaft fractures are often associated with radial nerve palsy (RNP) (8-16%). The primary aim of this systematic review was to assess the incidence of primary and secondary RNP in closed humeral shaft fractures. The secondary aim was to compare the recovery rate of primary RNP and the incidence of secondary RNP betwee...

Purpose To determine the definitions for recurrence used in the literature, assess the consensus in using these definitions, and determine the impact of these definitions on recurrence rates. Methods A literature search was performed in PubMed and EMBASE including studies from 2000 to 2020 reporting on recurrence rates after anterior arthroscopic...

Background Lesser tuberosity fractures are relatively rare, with an incidence of 0.46 per 100,000 persons per year. This systematic review was performed to address patient reported outcomes (PROMs), shoulder function and complications after lesser tuberosity fractures in pediatric and adult patients, as well as patients with an associated posterior...

Aims This study evaluated variation in the surgical treatment of stable (A1) and unstable (A2) trochanteric hip fractures among an international group of orthopaedic surgeons, and determined the influence of patient, fracture, and surgeon characteristics on choice of implant (intramedullary nailing (IMN) versus sliding hip screw (SHS)). Methods A...

Purpose To investigate the occurrence of heat-related complications from radiofrequency and electrocautery devices in patients undergoing arthroscopic surgery. Methods A systematic review was performed using the PubMed/Medline, Embase, CINAHL (Cumulative Index to Nursing and Allied Health Literature), and Cochrane databases, in accordance with the...

Background Rockwood I and II acromioclavicular joint injuries are generally treated nonoperatively. The long-term outcome is considered to be good but has not yet been properly investigated. Purpose To assess the long-term outcome after nonoperative therapy for Rockwood I and II acromioclavicular joint injuries regarding functional and radiologic...

Stemless shoulder arthroplasty relies solely on cementless metaphyseal fixation and is designed to avoid stem-related problem such as intraoperative fractures, loosening, stress shielding or stress-risers for periprosthetic fractures. Many designs are currently on the market, although only six anatomic and two reverse arthroplasty designs have resu...

The radiographic appearance of calcific tendinitis of the rotator cuff varies according to the stage of the disease. We compared currently used classification systems in a large group of observers to identify the most reliable classification system. Thirty-seven orthopaedic surgeons evaluated shoulder radio-graphs of 25 patients to classify the sta...

- Primary osteoarthritis (OA) of the elbow can cause disabling symptoms of pain, locking, stiffness, and a limitation in the range of motion. There is no consensus regarding the role of open and arthroscopic debridement in the treatment of symptomatic primary elbow OA. The aim of this study is to systematically review the outcome of surgical debrid...

Background The Popeye sign is a frequently reported finding following LHB surgery and may be more often detected by doctors than by patients. This study investigates agreement between patients and doctors regarding the presence of a Popeye sign following LHB surgery. Method This Inter-observer study investigates agreement between patients and cons...

Background: Intra-articular hyaluronic acid (IAHA) can be injected into an osteoarthritic hip joint to reduce pain and to improve functionality. Several studies report IAHA to be safe, with minor adverse effects that normally disappear spontaneously within a week. However, intra-articular corticosteroids prior to total hip arthroplasty (THA) have b...

Purpose To examine the impact of rotator cuff calcific tendinitis on patients’ self-reported work ability and sick leave, to compare work ability and sick leave with shoulder function after minimally invasive treatment, and to assess which prognostic factors influence the change in work ability. Methods A prospective cohort was analyzed in this st...

This classic discusses the original publication “Treatment of acromioclavicular injuries, especially complete acromioclavicular separation” by Weaver and Dunn, which collaborated to develop a technique for acromioclavicular joint reconstruction in 1972. Their surgical technique described resection of 2 cm of the distal clavicle and transfer of the...

Purpose: Age at primary dislocation, recurrence, and glenoid bone loss are associated with development of osteoarthritis (OA). However, an overview of OA following traumatic anterior shoulder instability is lacking and it is unclear to what degree type of surgery is associated with development of OA in comparison to non-operative treatment. The aim...

Background Hegemann disease and fishtail deformity are classified as growth disturbances in the physeal plate of the humeral trochlea. It is questionable if these two diseases should be considered as two distinct conditions. The aims of this study are to (1) point out similarities between both conditions, (2) discuss etiology and (3) provide diagno...

Purpose Ulnar nerve injury is the most common neurological complication of elbow arthroscopy. The purpose of this cadaveric study was to quantify the ability of surgeons to locate the ulnar nerve behind the posteromedial capsule during elbow arthroscopy using sole arthroscopic vision. Methods Twenty-one surgeons were asked to pin the ulnar nerve a...

Background Suprapectoral long head biceps (LHB) tenodesis and subpectoral LHB tenodesis are both commonly performed surgical procedures. Due to the more proximal position of the suprapectoral tenodesis site this technique may be accompanied with more postoperative pain in the bicipital groove and cramping pain in the biceps muscle. We hypothesized...

Background: Medical students and residents rely increasingly on web-based education. Online videos provide unique opportunities to share knowledge. The objective of this study was to investigate the accuracy and quality of instructional videos on the physical examination of the elbow and identify factors influencing educational usefulness. Methods...

Background Suprapectoral long head biceps (LHB) tenodesis and subpectoral LHB tenodesis are both commonly performed surgical procedures. Due to the more proximal position of the suprapectoral tenodesis site this technique may be accompanied with more postoperative pain in the bicipital groove and cramping pain in the biceps muscle. We hypothesized...

Introduction It is common practice to obtain follow-up radiographs of non-operatively treated isolated greater tuberosity (GT) fractures 1 to 2 weeks after trauma. However, the majority of non-operatively treated GT fractures remain stable and do not require reconsideration of the initial treatment decision. Radiological follow-up therefore might b...

Background Intramedullary nailing of tibial shaft fractures has been common practice for decades. Nevertheless, complications occur frequently, and subsequent surgery is often required. To improve our understanding on how we may improve trauma care for patients with tibial shaft fractures, this study systematically reviewed all currently available...

Purpose The aim of this study was to determine the accuracy of glenoid bone loss measuring methods and assess the influence of the imaging modality on the accuracy of the measurement methods. Methods A literature search was performed in the PubMed/Medline, EMBASE and Cochrane databases from 1994 to the 11th of June 2019. The guideline and algorith...

Introduction It is common practice to obtain follow-up radiographs of non-operatively treated isolated greater tuberosity (GT) fractures 1 to 2 weeks after trauma. However, the majority of non-operatively treated GT fractures remain stable and do not require reconsideration of the initial treatment decision. Radiological follow-up therefore might b...

Dear editor: A shoulder dislocation is a common diagnosis at the emergency department, showing an incidence of 23.9 per 100,000 person-years. In the current diagnostic work-up, a radiograph is often used to confirm the dislocation. As radiographs are associated with radiation exposure, the ultrasound has been proposed as an alternative. Therefore,...

Background Throwing athletes sustaining an ulnar collateral ligament (UCL) injury may recall a popping sensation originating from the medial elbow at the time of injury. There are no studies available that inform clinicians how to utilize this salient anamnestic information and what amount of diagnostic weight to afford to it. Purpose To assess th...

The aim of arthroscopic debridement is creating a stable rim and improving nutrient supply by chondral abrasion to provide an optimal environment for the cartilage to regenerate. Microfracturing can be added to further improve nutrient supply and formation of fibrocartilaginous tissue [1, 2]. Additionally, loose or fixed bodies can be removed, or i...

Since the introduction of the radial head prosthesis (RHP) in 1941, many designs have been introduced. It is not clear whether prosthesis design parameters are related to early failure. The aim of this systematic review is to report on failure modes and to explore the association between implant design and early failure. A search was conducted to i...

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 conveyed by e-mail among all members of the Dutch Arthroscopy Society (Nederlandse Vereniging va...

Background: Recognition of total elbow arthroplasties (TEAs) on plain radiographs is difficult due to a multitude of different types and models. Especially if surgery reports and documentation are not available, lost or when the primary surgery was performed in another hospital the prosthesis type may be undeterminable. Therefore we investigated i...

Background and purpose — The Australian Orthopaedic Association National Joint Replacement Registry (AOANJRR) was analyzed to determine trends in use of primary total elbow arthroplasty (TEA), the types of prostheses used, primary diagnoses, reasons for and types of revision, and whether the primary diagnosis or prosthesis design influenced the rev...

BACKGROUND: In the treatment of Lateral Epicondylitis (LE) no single intervention concerning injection therapies has been proven to be the most effective with regard to pain reduction. In this trial 3 injection therapies (perforation with application of autologous blood, perforation with application of dextrose and perforation only) will be compare...

Objective To evaluate the value of radiographs during the diagnostic work-up of rotator cuff tears, using arthroscopy as reference standard. Materials and methods This retrospective study included 236 shoulders of 236 patients. All radiographs were evaluated for inferior cortical acromial sclerosis, lateral acromial spur, superior migration of the...

Background: Artificial-intelligence algorithms derive rules and patterns from large amounts of data to calculate the probabilities of various outcomes using new sets of similar data. In medicine, artificial intelligence (AI) has been applied primarily to image-recognition diagnostic tasks and evaluating the probabilities of particular outcomes aft...

Purpose The aim of the present study was to determine the long-term outcome after the arthroscopic Bankart procedure, in terms of recurrent instability, shoulder function, glenohumeral arthropathy and patient satisfaction. Methods Patients who underwent the arthroscopic Bankart procedure between January 1999 and the end of December 2005 were invit...

Purpose: To compare the clinical and biomechanical results of an arthroscopic Bankart repair alone with an arthroscopic Bankart repair combined with remplissage. Methods: A literature search was performed on May 1, 2018, in PubMed and Embase for studies comparing an isolated arthroscopic Bankart repair and an arthroscopic Bankart repair with rem...

Background: The purpose of this study was to increase our understanding of the pathoanatomy of the ulnar collateral ligament (UCL) by performing a descriptive analysis of the surgical inspection of the anterior bundle in patients undergoing reconstruction. Methods: A single-surgeon series of 163 patients who underwent UCL reconstruction between...