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Naoto Saito - One of the best experts on this subject based on the ideXlab platform.
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what components comprise the measurement of the tibial tuberosity trochlear groove distance in a Patellar Dislocation population
Journal of Bone and Joint Surgery American Volume, 2015Co-Authors: Keiji Tensho, Yusuke Akaoka, Hiroki Shimodaira, Seiji Takanashi, Shota Ikegami, Hiroyuki Kato, Naoto SaitoAbstract:Background: The tibial tuberosity-trochlear groove distance is used as an indicator for medial tibial tubercle transfer; however, to our knowledge, no studies have verified whether this distance is strongly affected by tubercle lateralization at the proximal part of the tibia. We hypothesized that the tibial tuberosity-trochlear groove distance is mainly affected by tibial tubercle lateralization at the proximal part of the tibia. Methods: Forty-four patients with a history of Patellar Dislocation and forty-four age and sex-matched controls were analyzed with use of computed tomography. The tibial tuberosity-trochlear groove distance, tibial tubercle lateralization, trochlear groove medialization, and knee rotation were measured and were compared between the Patellar Dislocation group and the control group. The association between the tibial tuberosity-trochlear groove distance and three other parameters was calculated with use of the Pearson correlation coefficient and partial correlation analysis. Results: There were significant differences in the tibial tuberosity-trochlear groove distance (p < 0.001) and knee rotation (p < 0.001), but there was no difference in the tibial tubercle lateralization (p = 0.13) and trochlear groove medialization (p = 0.08) between the Patellar Dislocation group and the control group. The tibial tuberosity-trochlear groove distance had no linear correlation with tubercle lateralization (r = 0.21) or groove medialization (r = −0.15); however, knee rotation had a good positive correlation in the Patellar Dislocation group (r = 0.62). After adjusting for the remaining parameters, knee rotation strongly correlated with the tibial tuberosity-trochlear groove distance (r = 0.69, p < 0.001), whereas tubercle lateralization showed moderate significant correlations in the Patellar Dislocation group (r = 0.42; p = 0.005). Conclusions: Because the tibial tuberosity-trochlear groove distance is affected more by knee rotation than by tubercle malposition, its use as an indicator for tibial tubercle transfer may not be appropriate. Clinical Relevance: Surgical decisions of tibial tubercle transfer should be made after the careful analysis of several underlying factors of Patellar Dislocation.
Aaron J Krych - One of the best experts on this subject based on the ideXlab platform.
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incidence of first time lateral Patellar Dislocation a 21 year population based study
Sports Health: A Multidisciplinary Approach, 2018Co-Authors: Thomas L Sanders, Ayoosh Pareek, Michael J Stuart, Diane L Dahm, Timothy E Hewett, Aaron J KrychAbstract:Background:First-time lateral Patellar Dislocation is a common orthopaedic injury. The purposes of this study were to (1) evaluate the incidence of first-time lateral Patellar Dislocation in a geog...
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patellofemoral arthritis after lateral Patellar Dislocation a matched population based analysis
American Journal of Sports Medicine, 2017Co-Authors: Thomas L Sanders, Ayoosh Pareek, Nick R Johnson, Michael J Stuart, Diane L Dahm, Aaron J KrychAbstract:Background:The rate of patellofemoral arthritis after lateral Patellar Dislocation is unknown.Purpose/Hypothesis:The purpose of this study was to compare the risk of patellofemoral arthritis and knee arthroplasty between patients who experienced a lateral Patellar Dislocation and matched individuals without a Patellar Dislocation. Additionally, factors predictive of arthritis after Patellar Dislocation were examined. The hypothesis was that the rate of arthritis is likely higher among patients who experience a Patellar Dislocation compared with those who do not.Study Design:Cohort study; Level of evidence, 3.Methods:In this study, 609 patients who had a first-time lateral Patellar Dislocation between 1990 and 2010 were compared with an age- and sex-matched cohort of patients who did not have a Patellar Dislocation. Medical records were reviewed to collect information related to the initial injury, recurrent Dislocation, treatment, and progression to clinically significant patellofemoral arthritis (defined...
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high rate of recurrent Patellar Dislocation in skeletally immature patients a long term population based study
Knee Surgery Sports Traumatology Arthroscopy, 2017Co-Authors: Thomas L Sanders, Ayoosh Pareek, Michael J Stuart, Diane L Dahm, Timothy E Hewett, Aaron J KrychAbstract:Purpose Patellar Dislocation can occur in isolation or be associated with chronic instability. The goals of this study are to describe the rate and factors associated with additional Patellar instability events (ipsilateral recurrence and contralateral Dislocation), as well as the development of patellofemoral arthritis in patients who are skeletally immature at the time of first Patellar Dislocation.
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medial patellofemoral ligament repair for recurrent Patellar Dislocation
American Journal of Sports Medicine, 2010Co-Authors: Christopher L Camp, Aaron J Krych, Diane L Dahm, Bruce A Levy, Michael J StuartAbstract:Background: The medial patellofemoral ligament (MPFL) is the primary restraint to extreme lateral displacement and is typically disrupted with an acute lateral Patellar Dislocation. Patients who fail a comprehensive nonoperative program and experience recurrent lateral Patellar instability episodes are candidates for surgical treatment. Current surgical procedures include a variety of proximal realignment techniques, including repair or reconstruction of the MPFL along with distal realignment of the tibial tubercle when indicated.Purpose: The objective of this study was to review the clinical, functional, and radiographic outcomes of isolated MPFL repair for recurrent lateral Patellar Dislocation.Study Design: Case series; Level of evidence, 4.Methods: The records of all patients undergoing MPFL repair for recurrent Patellar Dislocation at the Mayo Clinic from 2001 to 2006 were retrospectively reviewed. Twenty-seven patients (29 knees) with an average age of 19 years (range, 11-32 years) were included in ...
Philip Gartside Turner - One of the best experts on this subject based on the ideXlab platform.
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management of the first time lateral Patellar Dislocation
Knee, 2019Co-Authors: David Sands Johnson, Philip Gartside TurnerAbstract:Abstract Background Little guidance exists on the management of the first-time Patellar Dislocation. The aim of this article was to review current guidance for management of this condition. Methods Recent meta-analyses, systematic reviews and current consensus documents relating to first-time Patellar Dislocation were sourced. An instructional lecture was then created and delivered at the acute knee injuries session at the British Orthopaedic Association 2019 annual conference, which was presented on behalf of the British Association for Surgery of the Knee. This article has been written based on this lecture. Results There is a paucity of literature relating to management of the first-time Patellar Dislocation. Many studies are of poor design, with inadequate follow-up, making it difficult to draw conclusions from them. However, based upon available information and consensus from working groups it is recommended that patients presenting with first-time Dislocation should be assessed to ensure they have not sustained an alternative or associated injury that may require surgical intervention, be assessed and counselled for the risk of recurrent Dislocation, and be referred for initial conservative treatment. Surgical stabilisation should be reserved for patients with recurrent instability. Conclusions Most patients with a first-time Patellar Dislocation can be managed conservatively, having excluded associated injuries. Due to the poor quality of the literature, care must be taken interpreting the results of studies. It is clear that further research is required in this field.
Michael J Stuart - One of the best experts on this subject based on the ideXlab platform.
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incidence of first time lateral Patellar Dislocation a 21 year population based study
Sports Health: A Multidisciplinary Approach, 2018Co-Authors: Thomas L Sanders, Ayoosh Pareek, Michael J Stuart, Diane L Dahm, Timothy E Hewett, Aaron J KrychAbstract:Background:First-time lateral Patellar Dislocation is a common orthopaedic injury. The purposes of this study were to (1) evaluate the incidence of first-time lateral Patellar Dislocation in a geog...
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patellofemoral arthritis after lateral Patellar Dislocation a matched population based analysis
American Journal of Sports Medicine, 2017Co-Authors: Thomas L Sanders, Ayoosh Pareek, Nick R Johnson, Michael J Stuart, Diane L Dahm, Aaron J KrychAbstract:Background:The rate of patellofemoral arthritis after lateral Patellar Dislocation is unknown.Purpose/Hypothesis:The purpose of this study was to compare the risk of patellofemoral arthritis and knee arthroplasty between patients who experienced a lateral Patellar Dislocation and matched individuals without a Patellar Dislocation. Additionally, factors predictive of arthritis after Patellar Dislocation were examined. The hypothesis was that the rate of arthritis is likely higher among patients who experience a Patellar Dislocation compared with those who do not.Study Design:Cohort study; Level of evidence, 3.Methods:In this study, 609 patients who had a first-time lateral Patellar Dislocation between 1990 and 2010 were compared with an age- and sex-matched cohort of patients who did not have a Patellar Dislocation. Medical records were reviewed to collect information related to the initial injury, recurrent Dislocation, treatment, and progression to clinically significant patellofemoral arthritis (defined...
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high rate of recurrent Patellar Dislocation in skeletally immature patients a long term population based study
Knee Surgery Sports Traumatology Arthroscopy, 2017Co-Authors: Thomas L Sanders, Ayoosh Pareek, Michael J Stuart, Diane L Dahm, Timothy E Hewett, Aaron J KrychAbstract:Purpose Patellar Dislocation can occur in isolation or be associated with chronic instability. The goals of this study are to describe the rate and factors associated with additional Patellar instability events (ipsilateral recurrence and contralateral Dislocation), as well as the development of patellofemoral arthritis in patients who are skeletally immature at the time of first Patellar Dislocation.
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the sliver sign a specific radiographic sign of acute lateral Patellar Dislocation
Skeletal Radiology, 2012Co-Authors: John P Haas, Mark S Collins, Michael J StuartAbstract:Objective The objective of this work is to assess the prevalence of the sliver sign, defined as an intraarticular linear or curvilinear ossific density, in association with knee effusion in patients with acute knee trauma, as a predictor of recent lateral Patellar Dislocation (LPD).
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medial patellofemoral ligament repair for recurrent Patellar Dislocation
American Journal of Sports Medicine, 2010Co-Authors: Christopher L Camp, Aaron J Krych, Diane L Dahm, Bruce A Levy, Michael J StuartAbstract:Background: The medial patellofemoral ligament (MPFL) is the primary restraint to extreme lateral displacement and is typically disrupted with an acute lateral Patellar Dislocation. Patients who fail a comprehensive nonoperative program and experience recurrent lateral Patellar instability episodes are candidates for surgical treatment. Current surgical procedures include a variety of proximal realignment techniques, including repair or reconstruction of the MPFL along with distal realignment of the tibial tubercle when indicated.Purpose: The objective of this study was to review the clinical, functional, and radiographic outcomes of isolated MPFL repair for recurrent lateral Patellar Dislocation.Study Design: Case series; Level of evidence, 4.Methods: The records of all patients undergoing MPFL repair for recurrent Patellar Dislocation at the Mayo Clinic from 2001 to 2006 were retrospectively reviewed. Twenty-seven patients (29 knees) with an average age of 19 years (range, 11-32 years) were included in ...
Keiji Tensho - One of the best experts on this subject based on the ideXlab platform.
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what components comprise the measurement of the tibial tuberosity trochlear groove distance in a Patellar Dislocation population
Journal of Bone and Joint Surgery American Volume, 2015Co-Authors: Keiji Tensho, Yusuke Akaoka, Hiroki Shimodaira, Seiji Takanashi, Shota Ikegami, Hiroyuki Kato, Naoto SaitoAbstract:Background: The tibial tuberosity-trochlear groove distance is used as an indicator for medial tibial tubercle transfer; however, to our knowledge, no studies have verified whether this distance is strongly affected by tubercle lateralization at the proximal part of the tibia. We hypothesized that the tibial tuberosity-trochlear groove distance is mainly affected by tibial tubercle lateralization at the proximal part of the tibia. Methods: Forty-four patients with a history of Patellar Dislocation and forty-four age and sex-matched controls were analyzed with use of computed tomography. The tibial tuberosity-trochlear groove distance, tibial tubercle lateralization, trochlear groove medialization, and knee rotation were measured and were compared between the Patellar Dislocation group and the control group. The association between the tibial tuberosity-trochlear groove distance and three other parameters was calculated with use of the Pearson correlation coefficient and partial correlation analysis. Results: There were significant differences in the tibial tuberosity-trochlear groove distance (p < 0.001) and knee rotation (p < 0.001), but there was no difference in the tibial tubercle lateralization (p = 0.13) and trochlear groove medialization (p = 0.08) between the Patellar Dislocation group and the control group. The tibial tuberosity-trochlear groove distance had no linear correlation with tubercle lateralization (r = 0.21) or groove medialization (r = −0.15); however, knee rotation had a good positive correlation in the Patellar Dislocation group (r = 0.62). After adjusting for the remaining parameters, knee rotation strongly correlated with the tibial tuberosity-trochlear groove distance (r = 0.69, p < 0.001), whereas tubercle lateralization showed moderate significant correlations in the Patellar Dislocation group (r = 0.42; p = 0.005). Conclusions: Because the tibial tuberosity-trochlear groove distance is affected more by knee rotation than by tubercle malposition, its use as an indicator for tibial tubercle transfer may not be appropriate. Clinical Relevance: Surgical decisions of tibial tubercle transfer should be made after the careful analysis of several underlying factors of Patellar Dislocation.