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Dive into the research topics where Rebecca A Loredo is active.

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Featured researches published by Rebecca A Loredo.


Journal of Bone and Joint Surgery - Series A | 2012

Total shoulder arthroplasty with an all-polyethylene pegged bone-ingrowth glenoid component: A clinical and radiographic outcome study

Michael A. Wirth; Rebecca A Loredo; Glen Garcia; Charles A. Rockwood; Carleton Southworth; Joseph P. Iannotti

BACKGROUNDnLoosening of the glenoid component continues to be the foremost cause of medium and long-term failure of shoulder replacements. The purpose of this study was to evaluate the clinical and radiographic results of a minimally cemented all-polyethylene pegged glenoid component designed for biologic fixation.nnnMETHODSnForty-four shoulders in forty-one patients with a mean age of sixty-six years underwent total shoulder arthroplasty with a pegged bone-ingrowth glenoid component. Outcome data included the American Shoulder and Elbow Surgeons questionnaire, the Simple Shoulder Test, and visual analog scales. A detailed radiographic analysis was performed by two board-certified musculoskeletal radiologists who were blinded to clinical and patient-reported outcomes. The radiographs were evaluated with regard to the presence of radiolucent lines at the bone-cement interface, implant seating, and the radiodensity between the flanges of the central peg.nnnRESULTSnThe mean duration of clinical follow-up was four years and the mean duration of radiographic follow-up was three years. Twenty shoulders had perfect seating and radiolucency grades, thirty had increased radiodensity between the flanges of the central peg, and three demonstrated osteolysis. Radiodensity about the uncemented central peg at the time of the latest follow-up was positively associated with perfect seating and radiolucency grades on the initial postoperative radiographs (p = 0.03, Fisher exact test). The Simple Shoulder Test score, the American Shoulder and Elbow Surgeons score, and all visual analog scale scores had improved significantly (p < 0.01) at the time of the latest follow-up.nnnCONCLUSIONSnTotal shoulder arthroplasty with a minimally cemented, all-polyethylene, pegged glenoid implant can yield stable and durable fixation at short to medium-term follow-up (mean, four years).


Clinics in Sports Medicine | 2001

Imaging of osteochondral injuries

Rebecca A Loredo; Timothy G. Sanders

Acute injuries can produce fragments consisting of cartilage alone or cartilage and underlying bone. A purely cartilaginous fragment creates no direct radiographic abnormalities, whereas one containing calcified cartilage and bone appears as a radiodensity. The advent and refinement of MR imaging have led to the detection of occult injuries of subchondral bone and cartilage that can escape identification on routine radiographic analysis. The available data appear to indicate a substantial role for MR imaging in the analysis of lesion stability in cases of osteochondritis dissecans; however, further studies are required to determine its advantages over other methods, in particular, arthroscopy. Indirect evidence of cartilage abnormality on MR images relates to the identification of fluid at the interface between the fragment and the parent bone. The MR imaging technique influences dramatically whether such fluid is identified. MR arthrography employing the intra-articular injection of gadolinium compounds can be advantageous in the delineation of the chondral surface and in the detection of intraarticular bodies. Optimally, MR imaging would allow direct analysis of the cartilage surface, and specific imaging sequences that are most suited to this analysis are still evolving.


Foot and Ankle Specialist | 2010

Imaging of the Diabetic Foot Diagnostic Dilemmas

Rebecca A Loredo; Andres Rahal; Glenn M. Garcia; Darlene Metter

Multiple diagnostic imaging modalities are available and beneficial for the evaluation of the diabetic foot. There is not yet “one best test” for sorting out the diagnostic dilemmas commonly encountered. The differentiation of cellulitis alone from underlying osteomyelitis and the early detection of abscesses remain important diagnostic goals. Equally important, differentiation of osteomyelitis and neuroarthropathy remains a difficult job. This is often compounded by postoperative diabetic foot states status after reconstruction. Diagnostic evaluation often involves multiple studies that are complementary and that include conventional radiography, computed tomography, nuclear medicine scintigraphy, magnetic resonance imaging, ultrasonography, and positron emission tomography.


Journal of Bone and Joint Surgery, American Volume | 2007

Compaction Bone-Grafting in Prosthetic Shoulder Arthroplasty

Michael A. Wirth; Moon Sup Lim; Carleton Southworth; Rebecca A Loredo; T. Kenneth Kaar; Charles A. Rockwood

BACKGROUNDnCompaction bone-grafting has been suggested as a means of improving the stability of the humeral component in shoulder arthroplasty, but the clinical and radiographic results of the procedure have not been reported in the literature, to our knowledge. To address this deficit, we report on a series of shoulder arthroplasties performed with compaction bone-grafting to secure humeral component fixation. These prostheses were implanted in shoulders demonstrating a suboptimal interference fit of the humeral component.nnnMETHODSnFifty-eight shoulders in fifty-three patients were treated with prosthetic shoulder arthroplasty that included compaction bone-grafting. Clinical assessments were performed at regular intervals with use of visual analog scales for pain, shoulder comfort and function, and overall quality of life, and with use of patient self-assessments including the American Shoulder and Elbow Surgeons Score and the validated Simple Shoulder Test. A detailed radiographic analysis was performed by three raters to determine whether radiolucent lines were present immediately postoperatively and at a later follow-up interval. The humeral tilt angle was determined by measuring the angle between the humeral axis and the component. Subsidence was also evaluated. The mean of the raters measurements was used in the analysis.nnnRESULTSnThe mean duration of follow-up was sixty-nine months (range, twenty-six to 148 months). No loose stems were observed, and no humeral component was revised. At the time of follow-up, there was significant improvement in the Simple Shoulder Test scores and all visual analog scores (p < 0.0001 in each instance). Thirty-four stems had no radiolucent line at the time of follow-up, and the mean maximum thickness of the lucent lines was 0.21 mm in the entire group of fifty-eight shoulders. Most lucent lines occurred near the distal stem tip. The mean tilt of the valgus and varus humeral components was 2.2 degrees and 2.6 degrees , respectively, on the immediate postoperative radiographs. No humeral component shifted from varus to valgus or vice versa. The duration of follow-up was not correlated with the maximum thickness of the humeral component lucency, and the presence or absence of a prosthetic glenoid was also unrelated to the maximum thickness of the lucency.nnnCONCLUSIONSnCompaction bone-grafting in shoulder arthroplasty can yield stable and durable fixation of the humeral component, as seen clinically and radiographically, without use of cement. Our findings provide evidence that compaction bone-grafting in shoulder arthroplasty is an option to ensure intermediate-term fixation (at a mean of five years) of humeral components that have a suboptimal fit.


Current Problems in Diagnostic Radiology | 2008

Understanding Hallux Valgus Deformity: What the Surgeon Wants to Know from the Conventional Radiograph

Samir A. Chhaya; Melissa Brawner; Paul Hobbs; Neal Chhaya; Glenn M. Garcia; Rebecca A Loredo

Hallux valgus deformity is a common and a significant source of symptoms. It can interfere with daily activities and affects the quality of life of many people. Imaging evaluation is performed almost exclusively by conventional radiography and systematic evaluation of the conventional radiograph can provide the clinician with the necessary information to choose the correct surgical procedure. The radiologist should appreciate the various sites of angular deformity that can be associated with hallux valgus deformity, the nature of the articulations within the first ray, the presence of a bunion, the degree of sesamoid subluxation, and the quality of the bone stock. Systematic radiographic evaluation is vital for ensuring a good surgical outcome. All the conventional radiographic features that influence management are defined and quantified within this review and, importantly, their clinical significance is highlighted, allowing for a more purposeful radiographic interpretation.


Journal of Arthroplasty | 1998

Total hip arthroplasty in an adult with proximal femoral focal deficiency

Nusret Köse; Robert M. Campbell; Rebecca A Loredo; Lisa A. Wammack; Jay D. Mabrey

A 40-year-old woman with isolated unilateral proximal femoral focal deficiency presented with 2 years of gradually increasing left hip pain that interfered with her activities of daily living. A total hip arthroplasty was performed through a posterior approach. At 12 months, she had minimal discomfort about the hip, a markedly increased level of activity, and improved gait, and she required no ambulatory aids. This procedure is cautiously recommended for use in selected patients with proximal femoral focal deficiency.


Current Problems in Diagnostic Radiology | 2008

Understanding Hallux Valgus Deformity

Samir A. Chhaya; Melissa Brawner; Paul Hobbs; Neal Chhaya; Glenn M. Garcia; Rebecca A Loredo

Hallux valgus deformity is a common and a significant source of symptoms. It can interfere with daily activities and affects the quality of life of many people. Imaging evaluation is performed almost exclusively by conventional radiography and systematic evaluation of the conventional radiograph can provide the clinician with the necessary information to choose the correct surgical procedure. The radiologist should appreciate the various sites of angular deformity that can be associated with hallux valgus deformity, the nature of the articulations within the first ray, the presence of a bunion, the degree of sesamoid subluxation, and the quality of the bone stock. Systematic radiographic evaluation is vital for ensuring a good surgical outcome. All the conventional radiographic features that influence management are defined and quantified within this review and, importantly, their clinical significance is highlighted, allowing for a more purposeful radiographic interpretation.


Current Problems in Diagnostic Radiology | 2008

Original articleUnderstanding Hallux Valgus Deformity: What the Surgeon Wants to Know from the Conventional Radiograph

Samir A. Chhaya; Melissa Brawner; Paul Hobbs; Neal Chhaya; Glenn M. Garcia; Rebecca A Loredo

Hallux valgus deformity is a common and a significant source of symptoms. It can interfere with daily activities and affects the quality of life of many people. Imaging evaluation is performed almost exclusively by conventional radiography and systematic evaluation of the conventional radiograph can provide the clinician with the necessary information to choose the correct surgical procedure. The radiologist should appreciate the various sites of angular deformity that can be associated with hallux valgus deformity, the nature of the articulations within the first ray, the presence of a bunion, the degree of sesamoid subluxation, and the quality of the bone stock. Systematic radiographic evaluation is vital for ensuring a good surgical outcome. All the conventional radiographic features that influence management are defined and quantified within this review and, importantly, their clinical significance is highlighted, allowing for a more purposeful radiographic interpretation.


The Journal of Nuclear Medicine | 1998

Imaging experimental osteomyelitis using radiolabeled liposomes

Vibhudutta Awasthi; Beth Goins; Robert Klipper; Rebecca A Loredo; Donna L. Korvick; William T. Phillips


Seminars in Roentgenology | 2005

Radiographic evaluation of the wrist: a vanishing art.

Rebecca A Loredo; David G. Sorge; Glenn M. Garcia

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Glenn M. Garcia

University of Texas Health Science Center at San Antonio

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Samir A. Chhaya

University of Texas Health Science Center at San Antonio

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Melissa Brawner

University of Texas Health Science Center at San Antonio

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Paul Hobbs

University of Texas Health Science Center at San Antonio

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Neal Chhaya

Royal National Orthopaedic Hospital

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Andres Rahal

University of Texas Health Science Center at San Antonio

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Beth Goins

University of Texas Health Science Center at San Antonio

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Charles A. Rockwood

University of Texas Health Science Center at San Antonio

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Darlene Metter

University of Texas Health Science Center at San Antonio

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