1,721,037 research outputs found
Can Normal Fracture Healing Be Achieved When the Implant Is Retained on the Basis of Infection? An Experimental Animal Model
No full textInfection after open fractures is a common complication. Treatment options for infections developed after intramedullary nailing surgery remain a topic of controversy. We therefore used a rat fracture model to evaluate the effects of infection on osseous union when the implant was maintained
Analysis of degradation failure of poly L-lactic acid fixators used in meniscus tears
Get PDFObjectives: Biodegradable poly L-lactic acid (PLLA) fixators used in the repair of meniscal tears may cause adverse reactions inside the knee due to delayed degradation. This Study was designed to determine the reasons for late degradation of PLLA fixators. Methods: Three unused and three used meniscal PLLA fixators (BioStinger) were analyzed. The latter were removed from three patients due to persisting symptoms within six months after knee arthroscopy. Fourier transform infrared (FTIR) spectroscopy was performed and external and internal surfaces of the samples were examined by scanning electron microscopy (SEM) and C X-ray fluoroscopy (XRF). Chemical structural analyses of two samples (one from each group) were made by H-1-nuclear magnetic resonance (H-1-NMR) spectroscopy. Degradation times of two samples (one from each group) by oxidative hydrolysis in hydrogen peroxide solution were recorded. Results: Chemical structure of used and unused fixators did not differ in FTIR analysis. With increasing temperatures. unused and used fixators showed degradation with and without melt flow, respectively. In SEM analysis. inner sections of unused fixators were homogeneous. whereas those of the used ones exhibited crystals which were found to be sodium and potassium chloride salts in XRF analysis. The H-1-NMR spectrum of used and unused samples showed the normal pattern of lactic acid polymer. The unused and used fixators degraded in hydrogen peroxide solution in 10 days and 30 days, respectively. Conclusion: Both fixators had the same chemical structure in FTIR and NMR analyses. Formation of salt crystals seemed to be the most important cause of degradation failure, while changes in the physical properties of fixators were thought to be associated with delayed degradation
Pure elbow dislocation in a child wrestler with underlying hyperlaxity: what is the optimal time to return to competition?
No full textElbow dislocations are often considered serious injuries that can cause a child athlete to miss the entire season in wrestling. It was reported that the return to sports after the elbow dislocation was between 6-12 months in child wrestlers. In some cases, underlying hyperlaxity may have an essential role in the occurrence of pure elbow dislocation without any ligament injury. We report the case of a 10-year-old boy patient who had pure elbow dislocation following falling onto an outstretched hand in a wrestling match. Because of the physical examination findings of the patient indicated the presence of hyperlaxity, the patient was treated by closed reduction, short-term immobilization, and early strengthening of the dynamic stabilizers. This case report's findings suggest that detecting the presence of hyperlaxity in this specific patient group is crucial since this patient group has the potential to return to competitions 6 weeks after injury, unlike patients without hyperlaxity.Keywords:pure elbow dislocation, child wrestler, hyperlaxity, return to competition, return to sport
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
COMPARISON OF MATRIX RHYTHM THERAPY AND STRETCHING EXERCISES ON FROZEN SHOULDER: RANDOMISED CONTROLLED TRIAL
No full textPurpose: To compare the short-term effectiveness of Matrix Rhythm Therapy and stretching exercises in patients with frozen shoulder
An unusual cause of shoulder pain: stress fracture of the clavicle
No full textWe report a case of stress fracture of the clavicle in which diagnosis was delayed due to the unusual localization of pain and absence of predisposing risk factors. A 34-year-old woman presented with severe right-sided pain in the shoulder, arm, neck, and hemithorax, and numbness in her right upper extremity. Systemic radiographs, cervical and brachial plexus magnetic resonance imaging (MRI) and thorax computed tomography (CT) did not show any pathology. In a retrospective review of the shoulder MRI sections, an edematous appearance was noted in the right clavicle and adjacent soft tissues, suggesting a stress fracture of the clavicle. The patient was followed-up with activity limitation and analgesic treatment and her complaints subsided gradually. Control radiographs obtained 10 months later showed fracture healing with atypical callus formation. Stress fractures of the clavicle must be kept in mind in the differential diagnosis of shoulder pain presenting as an atypical severe arm pain radiating to the upper extremity and hemithorax. In suspected cases, it may be helpful to obtain CT and MRI sections parallel to the long axis of the clavicle
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