Andrew D Pearle

..Further insight into the basic science of cartilage and OA is necessary to develop diagnostic and treatment strategies for this pervasive disease...

..The objective of this study was to analyze 2 different single-bundle anterior cruciate ligament (ACL) reconstruction procedures and compare their ability to reduce the pivot-shift phenomenon with an anatomic double-bundle (DB) technique...

..This, in turn, could lead to a better understanding of the kinematics in play during the pivot shift phenomenon...

..This vertical mismatch position may significantly influence the ability of an ACL graft to stabilize the knee...

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..Biomechanical differences between anatomical double-bundle and central single-bundle anterior cruciate ligament reconstruction using the same graft tissue have not been defined...

..The pivot shift is a dynamic test of knee stability that involves a pathologic, multiplanar motion path elicited by a combination of axial load and valgus force during a knee flexion from an extended position...

..The purpose of this study was to objectively evaluate the anatomic and biomechanical outcomes of anterior cruciate ligament (ACL) reconstruction with transtibial versus anteromedial portal drilling of the femoral tunnel...

..Recent laboratory and clinical studies report no difference between single-bundle (SB) and double-bundle (DB) anterior cruciate ligament (ACL) reconstruction...

..The current investigators hypothesized that in a knee with UKA, single-bundle ACL reconstruction would restore tibiofemoral translation to levels similar to those of the intact ACL...

..The use of adjustable cutting blocks simplifies navigated procedures and may reduce the time required to perform a navigated total knee arthroplasty...

..The current authors report on a clinical application of a novel minimally invasive fixator-assisted correction of a posttraumatic distal femoral varus deformity after total knee arthroplasty with combined navigated measurements...

..Single-bundle ACL reconstructions using graft placement within the anterior footprint on the tibia may reduce rotational instability when compared with more vertical configurations...

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..The effect of proximal tibial slope on rotational stability of the knee is unknown...

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..By reconstructing the original anatomy, one hopes to eliminate issues related to graft elongation, impingement, and excessive tension while achieving ideal knee kinematics...

..The grading is subjective due to the broad range of examination techniques and lack of tibiofemoral motion quantification. The goal of this study was to develop and evaluate a mechanized device for quantitative assessment of the PST...

..Consequently, more reproducible and clinically meaningful quantification of the pivot-shift phenomenon may allow for more accurate evaluation of various anterior cruciate ligament reconstruction techniques in the future...

..This setup may increase consistency of clinical grading of the pivot shift test...

..To compare the time-zero stability of an anatomic anteromedial (AM) single-bundle ACL reconstruction to an anatomic central (CTR) single-bundle ACL reconstruction...

..The potentially mitigating effect of anatomic femoral socket position, however, has not been evaluated...

..With 8° of tibial slope leveling, anterior tibial translation during the Lachman test decreased by approximately 5mm. However, no variation in slope altered the pivot shift kinematics in the ACL deficient knees...

..Although osseous reference marker fixation is the current standard technique, this case underscores the need for non-invasive reference markers...

..We suggest that fluoroscopy-based navigation may improve the precision of long bone fracture reduction and reduce radiation exposure...

..There are other factors contributing to the magnitude of the pivot shift, such as concomitant generalized laxity, injury to the knee joint capsule, and size/or injury of other soft tissue structures that were not analyzed in this study...

..The postoperative long leg axis radiographs were within 1.6 degrees. Haptic guidance in combination with a navigation module allows for precise planning and execution of both inlay components in UKA...

..Clinical and basic-science research is necessary to better define technical specifications for navigated procedures...

..The aim of this study was to quantify the effects of distal femoral cut height on maximal knee extension and coronal plane knee laxity...

..Care should be taken when executing the cuts, which can affect precision in the sagittal plane more than actual positioning of the jig...

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..The quantitative effects of medial bone loss of the knee on both leg alignment and coronal plane stability are poorly understood...

..Prior studies have excluded such patients as confounding groups...

..However, normative anisometry and obliquity measurements for different single-bundle anterior cruciate ligament graft positions are not well described...

..5 mm. Everting the patella and resecting the PCL influenced gap balance and symmetry. Surgeons should be aware of how these conditions affect gaps during assessment and balancing...

..We also describe the distinct aspects of preoperative, intraoperative, and postoperative pain management and of intraoperative anesthesia and blood management...

..Minimal attention has been directed toward tibial tunnel position and the native tibial anterior cruciate ligament (ACL) footprint...

..The aim of this study was to evaluate the use of ACB in vivo...

..The purpose was to evaluate the relationship between native proximal tibial anatomy and knee kinematics in the anterior cruciate-deficient knee...

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..Computerized navigation has the potential for increasing precision in fracture reduction while minimizing fluoroscopic requirements...

..These advances may lead to a method of quantifying the pivot shift for research purposes and, ultimately, to ACL reconstruction that is tailored specifically to each patient's objectively measured rotational instability...

..Clinical examination remains empirical and may be confusing in the setting of rotatory knee instabilities. Computerized navigation systems provide the ability to visualize and quantify coupled knee motions during knee stability examination...

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..Computer navigation has been gaining popularity in orthopaedic surgery to improve accuracy and precision...

..Early protection of articular cartilage, before degenerative changes appear on radiographs, should result in better long-term results, but scientific evidence regarding the effectiveness of meniscal transplantation is lacking...

..The purpose of the present cadaveric study was to examine surgically relevant relationships for latissimus dorsi and teres major tendon transfers...

..This article will review the evolution of surgical techniques in TKA, the development of patient-specific cutting blocks, surgical considerations, and the literature associated with this new technology...

..The induction of T cell activation by titanium particles suggests lymphocytes may contribute to the inflammation that mediates osteolysis in patients with metallic particulate debris after total joint replacement...

..The patient was treated by open irrigation, debridement, removal of allograft and prosthesis, intravenous antibiotics, and implantation of an antibiotic impregnated cement spacer utilizing an intramedullary rod...

..There is also potential for these variables to be measured intraoperatively and guide ACL reconstruction when computer navigation is employed...