Search results for "Intramedullary rod"
showing 10 items of 39 documents
Kuntscher nailing of femoral shaft fractures in children and adolescents.
1993
We have reviewed 29 cases of very unstable diaphyseal fractures of the femur in children and adolescents treated by Kuntscher nailing. Follow up was for at least 5 years, and in most cases until after the end of growth. There were no post-operative complications, and the mean overgrowth of the femur was 7.06 mm. There was growth disturbance of the proximal femur in one case, but this did not interfere with function. We believe that Kuntscher nailing is indicated in children and adolescents with unstable high velocity fractures of the femoral shaft.
Intraosseous Fixation Compared to Plantar Plate Fixation for First Metatarsocuneiform Arthrodesis
2014
Background: Metatarsocuneiform (MTC) fusion is a treatment option for management of hallux valgus. We compared the biomechanical characteristics of an internal fixation device with plantar plate fixation. Methods: Seven matched pairs of feet from human cadavers were used to compare the intramedullary (IM) device plus compression screw to plantar plate combined with a compression screw. Specimen constructs were loaded in a cyclic 4-point bending test. We obtained initial/final stiffness, maximum load, and number of cycles to failure. Bone mineral density was measured with peripheral quantitative computed tomography. Performance was compared using time to event analysis with number of cycles …
Pathogenesis and prophylaxis of circulatory reactions during total hip replacement
1993
Circulatory reactions such as a drop in blood pressure, bradycardia, cardiac arrest, and even intraoperative death after insertion of the stem are well known events during total hip replacement. The present paper reports bone marrow intravasation after rise of intramedullary pressure in the femoral cavity during insertion of hip prostheses, demonstrated by intraoperative transesophageal echocardiography. In an animal study, the ultrasound echoes were identified as "mixed emboli" consisting of a core of bone marrow surrounded by thrombus. These results suggested the use of an intramedullary plug to restrict the intravasation of bone marrow. A trial was undertaken in 60 total hip replacement …
Effect of intramedullary gradual elongation of the shorter limb on gait patterns
2003
Background: Seven young patients were followed 52 weeks after intramedullary lengthening for limb length discrepancy (LLD). The mean LLD before surgery was 3.0 ± 1.1 cm and 1 year after surgery at the time of the nail-removal it was 0.3 ± 0.3 cm. Methods: The plantar pressures and the ground reaction forces (GRF) were recorded simultaneously with electromyographic (EMG) activities at normal and fast walking speeds. Results: Bilateral comparison indicated that the uncorrected LLD resulted in asymmetrical gait patterns. The peak pressures were higher in the lateral heel and in the medial forefoot in the longer limb as compared to the shorter limb at normal walking speed. At fast walking speed…
Nachweis von Markembolien wÄhrend Oberschenkelmarknagelungen mittels transösophagealer Echokardiographie
1989
Kardiopulmonale Komplikationen nach Marknagelosteosynthesen, insbesondere am Oberschenkel, sind bekannt. WAhrend der Nagelung einer Oberschenkelquerfraktur mit einem, geschlossenen distalen Fragment konnten durch transsophageale Echokardiographie im rechten Herzen durchstromende echogene Partikel nachgewiesen werden. Das intrakardiale Auftreten dieser Partikel stand in engem zeitlichen Zusammenhang mit dem Aufbohren der femoralen Markhohle und kann als Nachweis verschleppter Marksubstanz gedeutet werden. Die intraoperative Echokardiographie bietet sich an, Untersuchungen uber die Pathophysiologie kardiopulmonaler VerAnderungen nach Marknagel osteosynthesen durchzufuhren und die EffektivitAt…
Dynamische Analyse von Osteosynthesen am Olecranon: ein in-vitro Vergleich zweier Osteosynthesesysteme / Dynamic analysis of olecranon osteosyntheses…
2008
INTRODUCTION The aim of the present study was to develop a test setup with continuous angle alteration to imitate elbow joint motion for the mechanical evaluation of tension band wiring and a newly designed intramedullary nail. MATERIALS AND METHODS The servo-pneumatical test stand worked with a rotational angle-adjusted and a linear force-adjusted engine. The fracture model was dynamically tested under cyclic loading imitating elbow joint motion. In total, 14 fresh cadaver upper extremities underwent olecranon fracture by means of transverse osteotomy and were assigned to two groups: tension band wiring and intramedullary nailing. There was a continuous angle alteration between 0 and 1000 …
A Clinical Comparison between the Gamma® and the Claufitt® Nails in Unstable Proximal Femoral Fractures
2007
Purpose To assess the differences that exist between two intramedullary osteosynthesis systems for the treatment of unstable proximal femoral fractures in an attempt to find out whether the use of an antirotation screw improves the final result. Materials and methods A retrospective study was carried out to analyze the plcement and clinical evolution of both intramedullary nailing systems (Gamma ® y Claufitt ® ). The patients’ medium-term functional status was evaluated and benchmarked against the characteristics of the population served by our University Hospital. A final database was obtained made up of 43 cases of Claufitt ® that met the criteria of our study. A functional assessment sys…
Intramedullary nailing vs. palmar locked plating for unstable dorsally comminuted distal radius fractures: A biomechanical study
2010
Abstract Background The purpose of this study was to compare the stability of a 2.4 mm palmar locking compression plate and a new intramedullary nail-plate-hybrid Targon DR for dorsally comminuted distal radius fractures. Methods An extraarticular 10 mm dorsally open wedge osteotomy was created in 8 pairs of fresh frozen human radii to simulate an AO–A3-fracture. The fractures were stabilized using one of the fixation methods. The specimens were loaded axially with 200 N and dorsal-excentrically with 80 N. 2000 cycles of dynamic loading and axial loading-to-failure were performed. Findings Axial loading revealed that intramedullary osteosynthesis (Targon DR: 369 N/mm) was significantly ( p …
Concentration of chromium and nickel in serum of patients with orthopedic implant: An analysis
2021
Introduction: Surgical corrections of fracture using fixation devices made from various alloys (stainless steel, cobalt-chromium alloys, and titanium) carry a risk of these alloys leaching into circulation, potentially causing undesired health effects. Hence, monitoring the levels of metal ions in the serum of postoperative patients with metal implants is mandated. Materials and Methods: Blood samples from seventy patients with orthopedic metal implants was collected after a minimum postoperative period of 1 year. The samples were subjected to triple acid digestion and serum levels of chromium and nickel were analyzed using inductively coupled plasma-mass spectrometry. Results: The concentr…
Experimentelle Bestimmung der Gleitreibungskräfte beim Einschlagen von Oberschenkelmarknägeln
1990
No data have published concerning the procedure of driving in intramedullary nails. An extensive experimental device consisting of a contact-free distance measurement, a dynamograph connected to strain gages and an accelerometer now enabled this investigation. Among other things we determined the range of sliding friction for each stroke at different levels of nail-progression. Depending of the depth of nail-progression forces between 200 N und 400 N were measured. When the nail is stuck these values rise to over 1000 N. The sliding-process lasted between 10 ms and 20 ms. Knowledge of these data is of major importance for improvement of surgical technique and possible development of mechani…