Publications by authors named "Laurens Kaas"

Background: To evaluate predictors for effect of an intra-articular (IA) bupivacaine and corticosteroid injection in patients with femoroacetabular impingement syndrome (FAIS).

Methods: All patients between 18 and 50 years old with FAIS who received an intra-articular (IA) bupivacaine and corticosteroid injection between 2016 and 2019 were eligible for this retrospective study. Two groups were made, the non-arthroscopy group (patients for whom conservative treatment with physiotherapy and an IA bupivacaine and corticosteroid injection was sufficient) and the arthroscopy group (patients who needed an arthroscopy because conservative treatment and an IA bupivacaine and corticosteroid injection failed).

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Introduction: To date the aetiology of femoroacetabular impingement (FAI) is still not completely understood. There are mechanical theories that suggest symptomatic FAI is linked to sagittal pelvic morphology and spinopelvic-femoral dynamics. The aim of this study is to evaluate the relation of sagittal pelvic morphology and orientation to radiographic signs of FAI.

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With an incidence of 5.8 per 100,000 per year, patellar dislocations are commonly seen in the emergency department. Surprisingly, there are only a few studies available that focus on the results of the different non-surgical treatment options after first-time patellar dislocation.

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Background: Despite the expanding body of literature on radial head arthroplasty, the increasing understanding of elbow anatomy, biomechanics, and kinetics, and the evolution of surgical techniques and prosthesis designs, there is currently no evidence to support one type of radial head prosthesis over another. The purposes of the present report were to review the literature and to explore the association between prosthesis design variables and the timing of surgery and the outcome of modern radial head arthroplasty.

Methods: The literature search was limited to studies involving skeletally mature patients.

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Background: Theoretical advantages of bipolar compared with monopolar radial head arthroplasty include better accommodation of radiocapitellar malalignment, reduction of capitellar abrasion, and reduction of stress at the bone-implant interfaces. Our purpose was to report the midterm results of press-fit bipolar radial head arthroplasty.

Methods: Thirty patients were treated by press-fit bipolar radial head arthroplasty for acute fracture of the radial head, failed earlier treatment, or post-traumatic sequelae.

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Fracture of the radial head is a common injury. Over the last decades, the radial head is increasingly recognized as an important stabilizer of the elbow. In order to maintain stability of the injured elbow, goals of treatment of radial head fractures have become more and more towards restoring function and stability of the elbow.

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Background: Radial head fractures are commonly interpreted as isolated injuries, and it is assumed that the energy transferred during trauma has its influence on the risk on associated ipsilateral upper limb injuries. However, relationships between Mason classification, mechanism of injury, and associated injuries have been reported only once before in a relatively small population. The purpose of this study was to define whether trauma mechanism and patient related factors are of influence on the type of radial head fracture and associated injuries to the ipsilateral upper limb in 440 patients.

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Background: Identifying radial head fractures as fragility fractures may improve case-findings for osteoporosis and thus be an indicator other fragility fractures.

Materials And Methods: Thirty-five women aged ≥ 50 years with a radial head fracture and 57 controls were retrospectively selected and matched for age in strata of 5 years. Peripheral bone mineral density (BMD) measurement was performed at the calcaneus.

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Purpose: There is no consensus as to the best treatment of Mason type II fractures without concomitant elbow fractures or dislocation. The aim of this systematic review was to compare the results of operative and nonoperative treatment of these injuries.

Methods: We systematically screened the databases of PubMed, EMBASE, and Cochrane Library until September 2011 for studies on nonoperative or operative treatment of Mason type II fractures.

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Congenital dislocation of the radial head is rare, although it is the most common congenital anomaly of the elbow. A concomitant progressive cubitus valgus of the elbow has not previously been described in literature. We describe a case of an 8-year-old girl with an unilateral congenital radial head dislocation with a progressive cubitus valgus of 35°, caused by a prematurely closing physis of the lateral humeral condyle.

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Background: Recent studies report that magnetic resonance imaging (MRI) shows a high incidence of associated injuries in patients with a radial head fracture. This retrospective study describes the clinical relevance of these injuries.

Materials And Methods: Forty patients with 42 radial head fractures underwent a MRI scan after a mean of 7.

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Background And Purpose: Radial head fractures are common, and may be associated with other injuries of clinical importance. We present the results of a standard additional MRI scan for patients with a radial head fracture.

Patients And Methods: 44 patients (mean age 47 years) with 46 radial head fractures underwent MRI.

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Introduction: Recent literature shows an increased mean age of female patients with radial head fractures compared with male patients with radial head fractures. However, data on epidemiology of radial head fractures and specifically in relation to age distribution and male-female ratios of radial head fracture are scarce.

Materials And Methods: A retrospective database search was performed to identify all patients with a radial head fracture over a 3-year period.

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Radial head fractures are common injuries. In American publications, one-third of the patients with these fractures have been shown to have associated injuries. The aim of this retrospective study is to describe the epidemiology of radial head fractures and associated fractures of the ipsilateral upper extremity in a European population.

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