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Trochlear dysplasia

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https://www.readbyqxmd.com/read/28510474/increased-magnetic-resonance-imaging-signal-of-the-lateral-patellar-facet-cartilage-a-functional-marker-for-patellar-instability
#1
Anna L Falkowski, Carlo Camathias, Jon A Jacobson, Olaf Magerkurth
BACKGROUND: In the knee joint, predisposition for patellar instability can be assessed by an abnormal Insall-Salvati index, tibial tuberosity-trochlear groove (TTTG) distance, and abnormal shape of patella and trochlea. Given the complex anatomic features of the knee joint with varying positions of the patella during motion, the presence of a single or even a combination of these factors does not inevitably result in patellar instability. After trocheoplasty in patients with trochlear dysplasia, assessment of trochlear cartilage and subchondral bone is limited due to postoperative artifacts...
May 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28463535/risk-factors-and-time-to-recurrent-ipsilateral-and-contralateral-patellar-dislocations
#2
Tyson C Christensen, Thomas L Sanders, Ayoosh Pareek, Rohith Mahan, Diane L Dahm, Aaron J Krych
BACKGROUND: Previous studies have reported variable rates of recurrent lateral patellar instability mainly because of limited cohort sizes. In addition, there is currently a lack of information on contralateral patellar instability. PURPOSE: To evaluate the rate of recurrent ipsilateral patellar dislocations and contralateral patellar dislocations after a first-time lateral patellar dislocation. Additionally, risk factors associated with recurrent dislocations (ipsilateral or contralateral) and time to recurrence were investigated...
May 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28459752/patellar-instability-when-is-trochleoplasty-necessary
#3
S Evan Carstensen, Heather M Menzer, David R Diduch
Trochleoplasty is a very effective procedure for correcting trochlear dysplasia and addressing instability of the patella. With an increasing knowledge about the anatomy and biomechanics of the anterior distal femur, a wider array of surgical techniques may be applied to address specific conditions. Patients must be carefully selected to undergo trochleoplasty by use of a thorough history and physical examination as well as basic and advanced imaging. The presence of a "J sign" on physical examination, a history of recurrent instability, patella alta, trochlear dysplasia, and elevated tibial tubercle to trochlear groove are signs and symptoms for which the patient should be evaluated...
June 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28454185/patella-dislocation-in-children-and-adolescents
#4
Sven Höhne, Kristina Gerlach, Lars Irlenbusch, Mathias Schulz, Christian Kunze, Rainer Finke
Introduction Patellar dislocation is one of the commonest knee injuries in adolescents. Although treatment usually leads to good results, the influence of anatomical and functional factors on therapeutic strategy has been underestimated, especially in cases of recurrence. Patients and Methods The course of treatment has been analysed in 88 patients with 136 patellar dislocations. The importance of anatomical conditions was studied using X-ray and MRI findings. The treatment results were critically evaluated in comparison with current recommendations...
April 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28437490/the-diagnosis-and-initial-treatment-of-patellofemoral-disorders
#5
Alan C Merchant, John P Fulkerson, Wayne Leadbetter
Our purpose is to provide simple guidelines for the diagnosis and early care of patellofemoral disorders. Any clinician who treats knee problems, including family practitioners, rheumatologists, orthopedic surgeons, or physical therapists, must know how to make the correct diagnosis, or at least a presumptive diagnosis, at the initial visit. This can avoid unneeded and costly tests, ineffective treatment, and even damaging exercises and unnecessary surgery. The diagnosis of patellofemoral disorders is confusing because they can have many causes...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28315921/quality-assessment-of-radiological-measurements-of-trochlear-dysplasia-a-literature-review
#6
REVIEW
Mathias Paiva, Lars Blønd, Per Hölmich, Robert N Steensen, Gerd Diederichs, Julian A Feller, Kristoffer Weisskirchner Barfod
PURPOSE: To make a systematic review with quality assessments of the known measurements used to describe trochlear dysplasia. METHODS: A systematic literature search was conducted in the databases PubMed and Embase using the search string "trochlea dysplasia OR trochlear dysplasia". Papers were screened for their relevance based on predefined parameters, and all measurements showing a statistical association between trochlear dysplasia and patellar instability were presented...
March 18, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28299386/high-rate-of-recurrent-patellar-dislocation-in-skeletally-immature-patients-a-long-term-population-based-study
#7
Thomas L Sanders, Ayoosh Pareek, Timothy E Hewett, Michael J Stuart, Diane L Dahm, Aaron J Krych
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. METHODS: The study included a population-based cohort of 232 skeletally immature patients who experienced a first-time lateral patellar dislocation between 1990 and 2010...
March 15, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28280905/clinical-outcomes-after-revision-surgery-for-medial-patellofemoral-ligament-reconstruction
#8
Andreas Chatterton, Torsten Grønbech Nielsen, Ole Gade Sørensen, Martin Lind
PURPOSE: Medial patellofemoral ligament reconstruction (MPFL-R) is the standard surgical intervention for patella instability. However, limited knowledge exists concerning the causes for failure, and outcome after revision MPFL-R. The purpose of this study is to evaluate the causes of primary MPFL-R failure and clinical outcomes after revision MPFL-R. METHODS: Twenty-three patients (6 males and 17 females) with failed primary MPFL-R underwent isolated revision MPFL-R or combined revision MPFL-R with tibial tuberosity osteotomy (TTO)...
March 9, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28278379/tibial-tuberosity-anteromedialization-for-patellofemoral-chondral-disease
#9
Federica Rosso, Roberto Rossi, Giorgio Governale, Antongiulio Marmotti, Valeria Cherubini, Umberto Cottino, Davide Edoardo Bonasia
BACKGROUND: Tibial tuberosity anteromedialization (TTA) is a well-established treatment option for patellofemoral chondral disease that is resistant to nonoperative treatment. However, the prognostic factors of this procedure are unknown. PURPOSE: To analyze the prognostic factors correlated with the midterm outcomes of TTA for patellofemoral chondral disease and determine the survivorship. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Indications of TTA for chondral disease included skeletal maturity, age <65 years, <grade 3 Kellgren-Lawrence degeneration, and isolated patellofemoral pain for ≥6 months despite nonoperative treatment...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28277745/3d-computed-tomography-evaluation-of-morphological-changes-in-the-femoral-tunnel-after-medial-patellofemoral-ligament-reconstruction-with-hamstring-tendon-graft-for-recurrent-patellar-dislocation
#10
Keisuke Kita, Yoshinari Tanaka, Yukiyoshi Toritsuka, Hiroshi Amano, Ryohei Uchida, Yoshiki Shiozaki, Rikio Takao, Shuji Horibe
BACKGROUND: Reconstruction of the medial patellofemoral ligament (MPFL) for recurrent lateral patellar dislocation is gaining popularity. However, the morphological changes in the femoral tunnel after MPFL reconstruction are still not fully documented. PURPOSE: This study used 3-dimensional (3D) computed tomography to evaluate morphological changes in the femoral tunnel after MPFL reconstruction with hamstring tendon graft to investigate factors affecting the phenomenon and to elucidate whether it is associated with clinical outcomes...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28271370/inadequacy-of-computed-tomography-for-pre-operative-planning-of-patellofemoral-arthroplasty
#11
Mo Saffarini, Jacobus H Müller, Giuseppe La Barbera, Gerjon Hannink, Kyung Jin Cho, Cécile Toanen, David Dejour
PURPOSE: To evaluate the accuracy of preoperative planning for patellofemoral arthroplasty (PFA) by comparing: (1) virtual implant positioning simulated on pre-operative images versus (2) real implant positioning from post-operative images. METHODS: The authors prospectively studied 15 patients that received a PFJ implant (Tornier, Montbonnot France). A pre-operative planning software was established to determine the size and position of the trochlear component...
March 7, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28246877/anatomic-patellar-instability-risk-factors-in-primary-lateral-patellar-dislocations-do-not-predict-injury-patterns-an-mri-based-study
#12
Marc A Tompkins, Sara R Rohr, Julie Agel, Elizabeth A Arendt
PURPOSE: The primary goal was to describe the injury patterns in a population of primary (first time) lateral patellar dislocators (LPD) to lend clarity to commonly held notions about injury patterns in this population. METHODS: A prospective study identifying patients presenting with LPD between 2008 and 2012. Inclusion criteria were a history and physical exam consistent with primary LPD, and an MRI consistent with the diagnosis without other significant ligamentous injury...
February 28, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28219090/quality-of-life-outcomes-of-patients-following-patellofemoral-stabilization-surgery-the-influence-of-trochlear-dysplasia
#13
Laurie Anne Hiemstra, Sarah Kerslake, Mark R Lafave
Trochlear dysplasia is a well-described risk factor for recurrent patellofemoral instability. Despite its clear association with the incidence of patellofemoral instability, it is unclear whether the presence of high-grade trochlear dysplasia influences clinical outcome after patellofemoral stabilization. The purpose of this study was to assess whether trochlear dysplasia influenced patient-reported, disease-specific outcomes in surgically treated patellar instability patients, when risk factors were addressed in accordance with the à la carte surgical approach to the treatment of patellofemoral instability...
February 20, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28217302/patellofemoral-joint-is-an-under-reported-joint-in-mri-knee-a-retrospective-cross-sectional-study
#14
Arun Khajuria, Amit Shah, Ankur Khajuria, Rajesh Botchu
BACKGROUND: Patellofemoral joint (PFJ) pathology accounts for upto 40% of cases of knee pain. It has been suggested that PFJ pathology may be underreported in Magnetic Resonance Imaging (MRI) Knee reports. The objective of this study was to elucidate whether PFJ was reported in MRI knee reports at our institution. MATERIALS AND METHODS: A retrospective review of 103 consecutive Knee MRIs over a 2-month period was performed by an author, blinded to the reports, at our institution...
March 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/28210789/medial-patellofemoral-ligament-mpfl-reconstruction-in-combination-with-a-modified-grammont-technique-leads-to-favorable-mid-term-results-in-adolescents-with-recurrent-patellofemoral-dislocations
#15
Helmut Wegmann, Christoph Würnschimmel, Tanja Kraus, Georg Singer, Robert Eberl, Holger Till, Matthias Sperl
PURPOSE: The aim of the present study is to present the outcome of a cohort of adolescent patients with trochlear dysplasia and elevated tibial tuberosity trochlear groove (TTTG) distance suffering from recurrent patellar dislocation. Treatment consisted of medial patellofemoral ligament (MPFL) reconstruction and a modified Grammont procedure. METHODS: MRI examinations were obtained pre- and postoperatively. Trochlear dysplasia was classified according to Déjour, and TTTG was measured on MRI...
February 16, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28188083/ct-based-morphological-analysis-of-the-posterior-femoral-condyle-in-patients-with-trochlear-dysplasia
#16
Xiaohui Liu, Gang Ji, Xinmin Wang, Huijun Kang, Fei Wang
BACKGROUND: The anterior part of the distal femur in trochlear dysplasia has been well investigated; however, to date, posterior morphological characteristics have not been well studied. This study aimed to evaluate whether the posterior femoral condyle in patients with trochlear dysplasia differs from those without trochlear dysplasia. METHODS: Computed tomography scans of 75 knees with trochlear dysplasia and 55 knees with normal anatomy of the patellofemoral joint were analyzed retrospectively...
February 7, 2017: Knee
https://www.readbyqxmd.com/read/28178962/the-outcomes-of-the-modified-fulkerson-osteotomy-procedure-to-treat-habitual-patellar-dislocation-associated-with-high-grade-trochlear-dysplasia
#17
Hong Chen, Daohong Zhao, Jingming Xie, Qihui Duan, Jun Zhang, Zhidan Wu, Jia Jiang
BACKGROUND: Habitual patellar dislocation is not common in clinical practice, but it has a deep impact on the patient's lifestyle and movement. There has been no large case-control study on habitual patellar dislocation, and the management of it is still controversial. The aim of this study was to observe the efficacy of the modified Fulkerson procedure on patients with habitual patellar dislocation with high-grade trochlear dysplasia without trochleoplasty and to evaluate the results of this procedure...
February 8, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28177645/conventional-radiographs-and-magnetic-resonance-imaging-for-the-analysis-of-trochlear-dysplasia-the-influence-of-selected-levels-on-magnetic-resonance-imaging
#18
Philippe Matthias Tscholl, Florian Wanivenhaus, Sandro F Fucentese
BACKGROUND: Trochlear dysplasia is one of the most important risk factors for recurrent patellar instability. It is defined on true lateral conventional radiographs (CR) and axial magnetic resonance imaging (MRI). The type of trochlear dysplasia is decisive for surgical treatment; however, low agreement between CR and MRI has been reported. PURPOSE: To compare the Dejour classification of trochlear dysplasia on CR and axial MRI using differing levels defined in the literature...
April 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28104937/the-correlation-between-medial-plica-and-trochlear-dysplasis-an-mri-study
#19
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
#20
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
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