Orthopedics
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Skeletal osteochondromas or osteocartilaginous exostoses represent the most common of all benign bone tumors and 10% to 15% of all bone tumors. Osteochondromas are solitary or multiple, pedunculated or sessile exophytic outgrowths from the bone surface that are composed of cortical and medullary bone with an overlying hyaline cartilage cap. ⋯ After adolescence and skeletal maturity, osteochondromas usually exhibit no further growth. In adults, growth or imaging alterations of an osteochondroma suggest the rare diagnosis of malignant transformation; however, extensive growth of osteochondromas without histological evidence of malignancy has been reported
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Comparative Study Controlled Clinical Trial
Comparison between pointer-based and ultrasound-based navigation technique in THA using a minimally invasive approach.
The use of navigation techniques in primary total hip arthroplasty improves the position of endoprosthetic components, especially cup positioning. An intraoperative registration of the anterior pelvic plane is necessary to define the anteversion and inclination angles on the acetabular side. ⋯ Findings show more accurate postoperative radiographic anteversion with ultrasound navigation, although both manual pointer palpation and ultrasound registration techniques show a very small standard deviation in anteversion, inclination, and leg length difference. In conclusion, we recommend navigation as a very reliable tool for the positioning of implants.
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Controlled Clinical Trial
Morcellized bone grafting for acetabular deficiency in cementless total hip arthroplasty.
Morcellized bone grafting was performed to significant acetabular deficiency in 35 hips of 29 patients in cementless total hip arthroplasty (THA). Bridging trabeculation across the graft-host interface, remodeling of the graft, and trabecular reorientation were observed at 4 weeks, 3.7 months, and 10.7 months postoperatively, respectively. These remodeling processes were observed in all cases. Morcellized bone grafting for acetabular deficiency in cementless THA stock, which is necessary to make the cup stable, revealed encouraging early trabecular reorientation and recovery of acetabular bone even in cases in which structural bone grafting is needed.
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Comparative Study
Biomechanical stability of different fixation constructs for ORIF of radial neck fractures.
Radial head and neck fractures are common and at times require operative fixation. There is no consensus on the ideal fixation construct for unstable radial neck fractures. Using 7 fresh frozen cadaveric radii, fractures of the radial neck were created 2 cm from the articular surface. ⋯ In this model, plating showed an increase in stiffness in torsional loading as compared to K-wires. The addition of a lag screw across the neck fracture consistently showed an increase in torsional and bending stiffness of the constructs. These data may assist orthopedic surgeons in determining the best fixation for radial neck fractures.