Rodrigo M. Mardones

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BACKGROUND In patients with symptomatic hip impingement, surgical resection of the femoral head-neck junction may improve the range of motion and relieve pain. A risk of this procedure is fracture. We evaluated the amount of resection of the anterolateral aspect of the femoral head-neck junction that can be done safely. METHODS Cadaveric proximal femoral(More)
PURPOSE The purpose of this study was to determine if the use of platelet concentrate (PC) and bone plug (BP) does accelerate the healing process in anterior cruciate ligament (ACL) reconstruction. METHODS One hundred and eight patients requiring ACL reconstruction were prospectively randomized into 4 groups: control (27 patients), PC (26 patients), BP(More)
Seventy-five revision total hip arthroplasties (73 patients) performed using an extended greater trochanteric osteotomy for exposure and an extensively porous-coated uncemented stem were reviewed after 2 years (range, 1 to 5). The mean osteotomy length was 14 cm (range, 7 to 19 cm) and fixation was with at least 2 cables. One stem was revised at 4 months(More)
PURPOSE Our purpose was to develop an alternative method to divide the acetabulum and femoral head into different zones based on anatomic landmarks clearly visible during arthroscopy to facilitate reporting the geographic location of intra-articular injuries. METHODS Two vertical lines are positioned across the acetabulum aligned with the anterior and(More)
PURPOSE The goal of this study was to compare open and arthroscopic surgical techniques for "cam-type" femoroacetabular impingement in terms of feasibility and reliability. METHODS We used 5 fresh-frozen cadaver specimens (10 hips). Anteroposterior and cross-table radiographs were taken for each. The head-neck union diameter was measured for each. The(More)
Some surgeons have suggested that a minimally invasive two-incision approach allows total hip arthroplasty to be done without cutting or damaging any muscle or tendon. To our knowledge that claim has not been supported by any published clinical or basic science data. Our purpose in doing this study was to quantify the extent and location of damage to the(More)
Minimal information exists regarding early complications after operatively treated proximal humeral fractures. Of the 82 shoulders that had osteosynthesis, 42 had a (nonmedical) complication, with 21 requiring further surgery. Of 42 shoulders with complications, 12 were related to incomplete reduction, 16 had loss of anatomic fracture fixation, 9 had(More)
Currently, various techniques are in use for the repair of osteochondral defects, none of them being truly satisfactory and they are often two step procedures. Comorbidity due to cancellous bone harvest from the iliac crest further complicates the procedure. Our previous in vitro studies suggest that porous tantalum (TM) or poly-epsilon-caprolactone(More)
OBJECT Several reports have shown that nonsteroidal antiinflammatory drugs (NSAIDs) have an inhibitory effect in osteogenesis and reduce heterotopic ossification in humans. A deleterious effect of NSAIDs in posterolateral intertransverse process fusion has also been suggested. The authors used a validated rabbit model to try to determine the influence of(More)
Articular cartilage injuries caused by traumatic, mechanical and/or by progressive degeneration result in pain, swelling, subsequent loss of joint function and finally osteoarthritis. Due to the peculiar structure of the tissue (no blood supply), chondrocytes, the unique cellular phenotype in cartilage, receive their nutrition through diffusion from the(More)