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Trochlear dysplasia

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https://www.readbyqxmd.com/read/28104937/the-correlation-between-medial-plica-and-trochlear-dysplasis-an-mri-study
#1
Elif E Ekin, Hülya K Yildiz, Harun Mutlu, Engin Çetinkaya
BACKGROUND: Trochlear dysplasia is the most commonly encountered congenital etiologic factor of anterior knee pain. AIMS: The purpose of this study was to evaluate the relationship between trochlear dysplasia with medial patellar plica as well as to investigate the distribution of plica types according to types of dysplasia. SETTINGS AND DESIGN: This is a retrospective case-control study. MATERIALS AND METHODS: This study was conducted among 138 knee magnetic resonance imaging (MRI) scans...
October 2016: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/28028569/functional-testing-and-return-to-sport-following-stabilization-surgery-for-recurrent-lateral-patellar-instability-in-competitive-athletes
#2
Aaron J Krych, Michael P O'Malley, Nick R Johnson, Rohith Mohan, Timothy E Hewett, Michael J Stuart, Diane L Dahm
PURPOSE: Medial patellofemoral ligament (MPFL) reconstruction and tibial tubercle osteotomy are commonly used to treat recurrent lateral patellar instability, yet there are limited available data on return to sport (RTS) following these procedures. The purpose of this study is to evaluate patient factors associated with excellent functional outcomes, including successful RTS, following surgical stabilization including MPFL reconstruction in competitive athletes with recurrent lateral patellar instability...
December 27, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28005405/patellofemoral-arthritis-after-lateral-patellar-dislocation
#3
Thomas L Sanders, Ayoosh Pareek, Nicholas R Johnson, Michael J Stuart, Diane L Dahm, Aaron J Krych
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...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27999505/osteochondral-allograft-transplantation-for-femoral-trochlear-dysplasia
#4
Dharmpal V Vansadia, James R Heltsley, Scott Montgomery, Misty Suri, Deryk G Jones
BACKGROUND: The risk factors for patellofemoral joint instability include laxity of medial patellar restraints, abnormal limb geometry, femoral and tibial malrotation, patella alta, and trochlear dysplasia. Femoral trochlear dysplasia is characterized by a hypoplastic or shallow trochlear groove. CASE REPORT: We report the case of a 31-year-old female with trochlear dysplasia and recurrent patella dislocations, laxity of the medial patellofemoral ligament (MPFL), and high-grade chondromalacia of the trochlea and the patella...
2016: Ochsner Journal
https://www.readbyqxmd.com/read/27988165/increased-femoral-anteversion-influence-over-surgically-treated-recurrent-patellar-instability-patients
#5
Carlos Eduardo Franciozi, Luiz Felipe Ambra, Leonardo José Bernardes Albertoni, Pedro Debieux, Fernando Cury Rezende, Mauricio Ayres de Oliveira, Marcio de Castro Ferreira, Marcus Vinícius Malheiros Luzo
PURPOSE: To verify the influence that increased femoral anteversion (FA) has on patients with recurrent patellar instability (RPI) treated by anteromedialization tibial tubercle osteotomy (TTO) combined with medial patellofemoral ligament reconstruction (MPFLR) and to present the midterm outcomes of these patients. METHODS: From January 2008 to August 2013, skeletally mature patients with RPI and tibial tubercle (TT)-trochlear groove (TG) ≥ 17 mm who underwent anteromedialization TTO combined with MPFLR were evaluated for J sign, patellar glide, apprehension test, increased FA, Caton index, trochlea dysplasia, TT-TG, Kujala, International Knee Documentation Committee subjective knee evaluation form, and Tegner...
December 14, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27973951/patient-specific-modeling-of-the-trochlear-morphologic-anomalies-by-means-of-hyperbolic-paraboloids
#6
Pietro Cerveri, Guido Baroni, Norberto Confalonieri, Alfonso Manzotti
Diagnostic and therapeutic purposes are issuing pressing demands to improve the evaluation of the dysplasia condition of the femoral trochlea. The traditional clinical assessment of the dysplasia, based on Dejour classification, recognized 4 increasing (A, B, C, D) levels of severity. It has been extensively questioned in the literature that this classification methodology can be defective suggesting that quantitative measures can ensure more reliable criteria for the dysplasia severity assessment. This study reports on a novel technique to model the trochlear surface (TS), digitally reconstructed by 3D volumetric imaging, using three hyperbolic paraboloids (HP), one to describe the global trochlear aspect, two to represent the local aspects of the medial and lateral compartments, respectively...
December 2016: Comput Assist Surg (Abingdon)
https://www.readbyqxmd.com/read/27904790/current-concepts-in-the-treatment-of-gross-patellofemoral-instability
#7
Grant Buchanan, LeeAnne Torres, Brian Czarkowski, Charles E Giangarra
: Patellofemoral instability is a painful and commonly recurring condition, which often must be managed surgically. Diagnosis can be aided by the use of a variety of physical exam signs, such as the Q angle, Beighton hypermobility score, glide test, J sign, patellar tilt test, and apprehension test. Imaging modalities including x-ray, CT, and MRI guide both diagnosis and management by revealing trochlear dysplasia, bony malalignment, and ligamentous injury that contribute to instability...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27849106/computed-tomography-and-radio-graphic-assessment-of-congruity-between-the-ulnar-trochlear-notch-and-humeral-trochlea-in-large-breed-dogs
#8
Sofia Alves-Pimenta, Mário M Ginja, Armando M Fernandes, António J Ferreira, Pedro Melo-Pinto, Bruno Colaço
OBJECTIVE: Assess the fit between the ulnar trochlear notch (UTN) and humeral trochlea (HT) in elbow radiographs and computed tomography (CT) images by measuring the curvature radii in normal joints. METHODS: Mediolateral extended view (MLE) and CT were performed on 16 elbows from cadaveric dogs weighing over 20 kg. Curves were traced at the subchondral level from the UTN central ridge and the HT sagittal groove related to the UTN on ~132° joint extension. Curvature radii were achieved using appropriate computer software...
November 16, 2016: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/27826597/are-the-current-classifications-and-radiographic-measurements-for-trochlear-dysplasia-appropriate-in-the-skeletally-immature-patient
#9
Matthew Stepanovich, James D Bomar, Andrew T Pennock
BACKGROUND: The assessment and classification of trochlear dysplasia in pediatric patients has yet to be well documented or validated. PURPOSE: To examine several different measurements/classifications of trochlear dysplasia in skeletally immature patients to assess inter- and intraobserver reliability and to determine which best correlates with patellar instability. STUDY DESIGN: Cohort study (diagnosis); Level of evidence, 3. METHODS: Radiographs and magnetic resonance imaging (MRI) scans of 36 skeletally immature patients undergoing surgery for patellar instability were compared with 27 age-matched cohort patients who had similar imaging for an acute knee injury but no clinical evidence of patellar instability...
October 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27796419/results-of-medial-patellofemoral-ligament-reconstruction-compared-with-trochleoplasty-plus-individual-extensor-apparatus-balancing-in-patellar-instability-caused-by-severe-trochlear-dysplasia-a-systematic-review-and-meta-analysis
#10
REVIEW
Peter Balcarek, Stephan Rehn, Nick R Howells, Jonathan D Eldridge, Keisuke Kita, David Dejour, Manfred Nelitz, Ingo J Banke, Delphine Lambrecht, Markus Harden, Tim Friede
PURPOSE: Many studies have reported satisfactory clinical outcomes and low redislocation rates after reconstruction of the medial patellofemoral ligament (MPFL) for the treatment of lateral patellar instability. Despite uncorrected severe trochlear dysplasia (Dejour type B to D) being acknowledged as a major reason for less favourable clinical outcomes and a higher incidence of patellar redislocations after an isolated MPFL reconstruction, the evidence for a deepening trochleoplasty procedure remains scarce in the current literature...
October 27, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27717972/assessment-of-demographic-and-pathoanatomic-risk-factors-in-recurrent-patellofemoral-instability
#11
Laurie Anne Hiemstra, Sarah Kerslake, Mark Lafave
PURPOSE: The WARPS/STAID classification employs clinical assessment of presenting features and anatomic characteristics to identify two distinct subsets of patients within the patellofemoral instability population. The purpose of this study was to further define the specific demographics and the prevalence of risky pathoanatomies in patients classified as either WARPS or STAID presenting with recurrent patellofemoral instability. A secondary purpose was to further validate the WARPS/STAID classification with the Banff Patella Instability Instrument (BPII), the Marx activity scale and the Patellar Instability Severity Score (ISS)...
October 7, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27652073/patellar-malalignment-a-new-method-on-knee-mri
#12
Hülya Kurtul Yildiz, Elif Evrim Ekin
PURPOSE: The medial patellofemoral ligament (MPFLL)/lateral patellar retinaculum (LPR) ratio were assessed in knees as a means to detect patellar malalignment. We also aimed to evaluate the prevalence of the various types of trochlear dysplasia in patients with patellar malalignment. MATERIALS AND METHODS: After approval of our institutional ethics committee, we conducted a retrospective study that included 450 consecutive patients to evaluate them for the presence of patellar malalignment...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27622149/femoro-patella-vialla-patellofemoral-arthroplasty-an-independent-assessment-of-outcomes-at-minimum-2-year-follow-up
#13
Mansur Halai, Andrew Ker, Iain Anthony, Graeme Holt, Bryn Jones, Mark Blyth
AIM: To determine outcomes using the Femoro-Patella Vialla (FPV) arthroplasty and if there is an ideal patient for this implant. METHODS: A total of 41 FPV patellofemoral joint replacements were performed in 31 patients (22 females, 9 males, mean age 65 years). Mean follow-up was 3.2 years (minimum 2 years). Radiographs were reviewed preoperatively and postoperatively. We assessed whether gender, age, previous surgery, patella atla or trochlear dysplasia influenced patient satisfaction or patient functional outcome...
August 18, 2016: World Journal of Orthopedics
https://www.readbyqxmd.com/read/27613760/morphology-and-anatomic-patellar-instability-risk-factors-in-first-time-traumatic-lateral-patellar-dislocations
#14
Marie Askenberger, Per-Mats Janarv, Throstur Finnbogason, Elizabeth A Arendt
BACKGROUND: The incidence of primary lateral patellar dislocation (LPD) in children aged 9 to 14 years is 0.6 to 1.2 per 1000. Causation is assumed to be multifactorial, including anatomic variants of the patellofemoral (PF) joint that result in a higher risk of LPD. No publication has compared the morphology of the PF joint and anatomic patellar instability risk factors (APIFs) in a primary LPD population versus controls, defining children by skeletal maturity. PURPOSE: To characterize the PF morphology and APIFs (trochlear dysplasia, abnormal lateral patellar tilt, elevated tibial tubercle-trochlear groove [TT-TG] distance, patella alta) through magnetic resonance imaging (MRI) measurements in skeletally immature children with and without a primary LPD and to identify (potential) distinctive differences between these 2 groups...
January 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27590642/does-the-utilization-of-allograft-tissue-in-medial-patellofemoral-ligament-reconstruction-in-pediatric-and-adolescent-patients-restore-patellar-stability
#15
Eric Hohn, Nirav K Pandya
BACKGROUND: Medial patellofemoral ligament (MPFL) reconstruction is one of several surgical procedures used to treat patellofemoral instability. Use of allograft tissue can preserve autogenous tissue and may be preferable in patients with connective tissue disorders or ligamentous laxity. Although there are successful reports in adults, it is unclear if the use of allograft tissue in MPFL reconstruction can restore patellofemoral stability in children and adolescents. QUESTIONS/PURPOSES: (1) Does allograft tissue in MPFL reconstruction in pediatric and adolescent patients restore patellar stability? (2) What complications were associated with allograft MPFL reconstructions in children and adolescents? METHODS: Between June 2012 and August 2015, one surgeon (NKP) performed 26 MPFL reconstructions in 23 patients with gracilis allograft for traumatic patellar instability...
September 2, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27436719/trochleoplasty-as-a-solitary-treatment-for-recurrent-patellar-dislocation-results-in-good-clinical-outcome-in-adolescents
#16
Carlo Camathias, Katrin Studer, Ata Kiapour, Erich Rutz, Patrick Vavken
BACKGROUND: The essential static patellar stabilizer is a normal-shaped trochlear groove. A dysplastic groove destabilizes the patella. Trochleoplasty approaches this underlying condition and reshapes the trochlea. However, studies have reported on trochleoplasty for revision cases or as accompanied by other interventions. The effect of trochleoplasty alone remains unexplained. PURPOSE: To introduce trochleoplasty as a stand-alone treatment for recurrent patellar dislocation and to compare its pre- to postoperative functional and clinical variables...
July 19, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27395356/morphological-classification-of-the-femoral-trochlear-groove-based-on-a-quantitative-measurement-of-computed-tomographic-models
#17
Shichang Chen, Zhe Du, Mengning Yan, Bing Yue, You Wang
PURPOSE: This study aimed to investigate the natural morphology of the femoral trochlear groove based on quantitative measurement. METHODS: Computed tomographic femur models of 50 male and 50 female healthy Chinese adults (30-60 years) were analysed using three-dimensional software. Coaxial cutting planes (15° increments) rotating about the trochlear groove axis from the proximal to distal point were created, followed by the deepest point of the trochlear groove marked at each cross section...
July 9, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27352088/injury-patterns-of-medial-patellofemoral-ligament-after-acute-lateral-patellar-dislocation-in-children-correlation-analysis-with-anatomical-variants-and-articular-cartilage-lesion-of-the-patella
#18
Guang-Ying Zhang, Lei Zheng, Hao Shi, Bing-Jun Ji, Yan Feng, Hong-Yu Ding
OBJECTIVES: To assess the relationship between injury patterns of medial patellofemoral ligament (MPFL) and anatomical variants and patellar cartilage lesions after acute lateral patellar dislocation (LPD) in children. METHODS: MR images were obtained in 140 children with acute LPD. Images were acquired and evaluated using standardised protocols. RESULTS: Fifty-eight cases of partial MPFL tear and 75 cases of complete MPFL tear were identified...
June 28, 2016: European Radiology
https://www.readbyqxmd.com/read/27274449/patellofemoral-joint-reconstruction-for-patellar-instability-medial-patellofemoral-ligament-reconstruction-trochleoplasty-and-tibial-tubercle-osteotomy
#19
Chase S Dean, Jorge Chahla, Raphael Serra Cruz, Tyler R Cram, Robert F LaPrade
Recurrent patellar instability can be very debilitating and may require surgical intervention. A thorough workup must be completed in this subset of patients. Risk factors for recurrent instability include patella alta, trochlear dysplasia, an increased tibial tubercle-trochlear groove distance, and insufficiencies in the medial retinacular structures. Necessary treatment of these risk factors, once identified, should be addressed surgically. Patellofemoral reconstruction must be individually tailored to each patient's anatomy and may necessitate medial patellofemoral ligament reconstruction, tibial tubercle osteotomy, or trochleoplasty in any combination or as a standalone procedure...
February 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27217524/effect-of-trochlear-dysplasia-on-outcomes-after-isolated-soft-tissue-stabilization-for-patellar-instability
#20
Laurie A Hiemstra, Sarah Kerslake, Michael Loewen, Mark Lafave
BACKGROUND: Trochlear dysplasia is a well-described risk factor for patellofemoral instability. Despite its clear association with the incidence of patellar instability, it is unclear whether the presence of high-grade trochlear dysplasia influences clinical outcome after patellofemoral stabilization. PURPOSE: To determine whether isolated proximal soft tissue stabilization for patellofemoral instability is as successful in patients with high-grade dysplasia compared with low-grade or no dysplasia, as measured by disease-specific quality-of-life and pain scores...
June 2016: American Journal of Sports Medicine
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