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TT-TG distance

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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
#1
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/28117636/are-metric-parameters-sufficient-alone-in-evaluation-of-the-patellar-instability-new-angular-measuring-parameters
#2
Alper Deveci, Deniz Cankaya, Serdar Yilmaz, Ersin Celen, Bulent Sakman, Murat Bozkurt
PURPOSES: When the evaluation of patellar instability is examined from the aspect of the conical-cylindrical anatomy of the tibia, metric measurement parameters such as the tuberositas tibia (TT)-trochlear groove (TG) and patellar tendon (PT) insertion-trochlear groove (TG) distances are not sufficient. We asked whether defined angular parameters reveal the rotational movement of the tuberositas tibia on the tibia shaft, additional to the metric parameters and there is a correlation between the metric and angular parameters...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28056523/the-tibial-tubercle-trochlear-groove-distance-is-greater-in-patients-with-patellofemoral-pain
#3
Victor R Carlson, Barry P Boden, Aricia Shen, Jennifer N Jackson, Lawrence Yao, Frances T Sheehan
BACKGROUND: The distance between the tibial tubercle (TT) and trochlear groove (TT-TG distance) is known to be greater in patients with patellar instability. However, the potential role and prevalence of pathological TT-TG distances in a large cohort of skeletally mature patients with isolated patellofemoral pain (PFP) are not clear. PURPOSE: To determine if the mean TT-TG distance is greater in patients with PFP, who lack a history of patellar dislocations, knee trauma, or osteoarthritis, relative to healthy controls...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28050572/comparison-of-a-novel-weightbearing-cone-beam-computed-tomography-scanner-versus-a-conventional-computed-tomography-scanner-for-measuring-patellar-instability
#4
John Marzo, Melissa Kluczynski, Anthony Notino, Leslie Bisson
BACKGROUND: Conventional computed tomography (CT) images are routinely used for diagnosing patellofemoral instability and are obtained with the patient in a supine position, nonweightbearing, with the knee in full extension, and with leg muscles relaxed. A new portable extremity cone beam CT (CBCT) scanner has been developed that may allow for more accurate diagnosis, as imaging can be performed with the patient standing, the knee flexed, and with leg muscles active. PURPOSE/HYPOTHESIS: The purpose of this study was to compare CT measurements of patellar alignment on a prototype scanner versus conventional scanner in patients with known patellar instability...
December 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28032709/relationship-between-patellar-tracking-and-the-screw-home-mechanism-of-tibiofemoral-joint
#5
Li-Kang Zhang, Xiao-Meng Wang, Ying-Zhen Niu, Hui-Xin Liu, Fei Wang
OBJECTIVE: To demonstrate the effect of the screw-home motion on the stability of the patellofemoral joint, and investigate its mechanism of regulation of patellar tracking. METHODS: Twenty volunteers who met the criteria were examined. All subjects had axial computed tomography (CT) scanning performed on bilateral knees at 0° and 30° of flexion. Scanning began above the femorotibial articulation and femoral trochlear groove, and moved sequentially down to the level of the anterior tibial tubercle...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28029800/patellofemoral-kinematics-and-tibial-tuberosity-trochlear-groove-distances-in-female-adolescents-with-patellofemoral-pain
#6
Victor R Carlson, Barry P Boden, Frances T Sheehan
BACKGROUND: Patellofemoral pain (PFP) is a prevalent disorder among female adolescents. Overuse is frequently cited as the cause of pain for this population. What is currently unclear, however, is if the patella demonstrates abnormal tracking patterns relative to the femoral trochlear groove in female adolescents with PFP. PURPOSE: The aim of this case-control study was to determine if abnormal patellar tracking patterns are present in female adolescents with PFP...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27941532/modification-of-the-alignment-between-the-tibial-tubercle-and-the-trochlear-groove-induced-by-temporary-hemiepiphysiodesis-for-lower-extremity-angular-deformities-a-trigonometric-analysis
#7
Dimitri Ceroni, Amira Dhouib, Laura Merlini, Georgios Kampouroglou
: This study aimed to predict the modification of the alignment between the tibial tubercle (TT) and the trochlear groove (TG) that occurs during femoral or tibial hemiepiphysiodesis. MRI scans of 541 knees were retrospectively reviewed to determine the distances between the cranial insertion of the patellar tendon on the TT and the femoral physis (FP)/tibial physis (TP). Thereafter, we developed a trigonometric formula to calculate the predicted change of the TT-TG distance that occurs during hemiepiphysiodesis around the knee using both the planned angular correction as well as the length between the physis (both distal femoral and proximal tibial) and the insertion of the patellar tendon of the TT...
December 9, 2016: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/27894178/comparison-of-radiological-parameters-between-normal-and-patellar-dislocation-groups-in-korean-population-a-rotational-profile-ct-based-study
#8
Jatin Prakash, Jong-Keun Seon, Seong-Hwan Woo, Cheng Jin, Eun-Kyoo Song
Purpose: Patellofemoral instability is a common cause of anterior knee pain in adolescents and young adults. Most normal and pathological values for diagnosing patellofemoral instability are based on Western literature. We conducted this radiological study to determine normal values for different patellofemoral parameters in a Korean population and to evaluate their usefulness in diagnosis. Materials and Methods: We retrospectively reviewed the rotational profile computerized tomography (CT) scans of the patellar dislocation and control groups...
December 1, 2016: Knee Surgery & related Research
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/27717972/assessment-of-demographic-and-pathoanatomic-risk-factors-in-recurrent-patellofemoral-instability
#10
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/27682301/outcomes-of-combined-tibial-tuberosity-transfer-and-medial-patellofemoral-ligament-reconstruction-for-recurrent-patellar-instability
#11
G Pemmaraju, J Bassett, R Abbas, G Nagra, S Chugh, E Mughal
Patellofemoral instability is multifactorial and is associated with pathomechanics secondary to anatomical variance. Surgical management of this problem must be tailored to each patient and a thorough clinical and radiological assessment of the anatomical alignment should be carried out pre-operatively. The aim of this study is to assess the role of medial patellofemoral ligament reconstruction combined with tibial tuberosity transfer in patients with increased tibial tuberosity to trochlear groove (TT-TG) distance...
August 2016: Acta Orthopaedica Belgica
https://www.readbyqxmd.com/read/27613760/morphology-and-anatomic-patellar-instability-risk-factors-in-first-time-traumatic-lateral-patellar-dislocations
#12
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/27574273/tibial-tubercle-to-trochlear-groove-distance-and-index-in-children-with-one-time-versus-recurrent-patellar-dislocation-a-magnetic-resonance-imaging-study
#13
C S N Yeoh, K Y Lam
PURPOSE: To compare the tibial tubercle to trochlear groove (TT-TG) distance and index using magnetic resonance imaging (MRI) between children with onetime and recurrent patellar dislocation. METHODS: Records of first-time acute patellar dislocations from 2007 to 2012 were reviewed. 20 males and 23 females aged 10 to 17 years at presentation were included for measurements of the bony and cartilaginous-tendon TT-TG distance and index. Recurrent patellar dislocation was defined as having more than one episode of dislocation within 2 years of the index injury...
August 2016: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/27565481/an-evaluation-of-the-effectiveness-of-medial-patellofemoral-ligament-reconstruction-using-an-anatomical-tunnel-site
#14
Kars P Valkering, Aysha Rajeev, Nick Caplan, Wim E Tuinebreijer, Deiary F Kader
PURPOSE: Medial patellofemoral ligament (MPFL) reconstruction for recurrent patellar instability has gained popularity, and anatomical and biomechanical studies have recently altered our operative techniques. The aim of this study was to report the clinical outcome of this new anatomical MPFL reconstructive technique and investigate whether correlating factors could be identified. METHODS: Between 2009 and 2012, a total of 31 consecutive patients underwent MPFL reconstruction using an autologous gracilis graft and anatomical tunnel placement...
August 26, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27184882/tt-tg-vs-modified-lateral-patellar-edge-for-determination-of-tibial-tubercle-transfer-distance-in-fulkerson-osteotomy-procedures
#15
Alan Edwards, Evan Larson, Mitchell Beckert, Nikhil Sahai, John P Albright
BACKGROUND: Tibial tubercle-trochlear groove (TT-TG) distance is currently used at our institution to determine tibial tubercle medialization required in Fulkerson osteotomies. If the correlation between a modified lateral patellar edge (LPE) and the transfer distance was found to be stronger than its correlation with TT-TG, it would suggest that the best measurement to use is actually modified LPE. METHODS: The electronic medical records of 32 patients who underwent Fulkerson osteotomy procedures with femoral nerve stimulation were reviewed and measured...
August 2016: Knee
https://www.readbyqxmd.com/read/27062838/-treatment-of-recurrent-patellar-dislocation-associated-with-old-osteochondral-fracture
#16
Zhu Dai, Di You, Ying Liao, Zhiwei Chen, Jiabin Peng
OBJECTIVE: To explore the treatment methed of recurrent patellar dislocation associated with old osteochondral fracture and to evaluate its effectiveness. METHODS: Between August 2010 and August 2014, 12 cases of recurrent patellar dislocation with old osteochondral fracture were treated. There were 4 males and 8 females with an average age of 18.3 years (range, 15-24 years). The left knee was involved in 7 cases and the right knee in 5 cases. All the patients had a history of patellar dislocation, the average interval from injury to first hospitalization was 7...
January 2016: Chinese Journal of Reparative and Reconstructive Surgery
https://www.readbyqxmd.com/read/27034087/why-are-bone-and-soft-tissue-measurements-of-the-tt-tg-distance-on-mri-different-in-patients-with-patellar-instability
#17
Betina B Hinckel, Riccardo G Gobbi, Eduardo N Kihara Filho, Marco K Demange, José Ricardo Pécora, Marcelo B Rodrigues, Gilberto Luis Camanho
PURPOSE: To determine whether the tibial tuberosity-to-trochlear groove distance (TT-TG) and patellar tendon-to-trochlear groove distance (PT-TG) are equal, whether the bony and cartilaginous points coincide in the trochlea, and whether the insertion of the PT coincides with the most anterior point of the TT in patients with patellar instability. METHODS: Fifty-three MRI scans of patients with patellar instability were examined. TT-TG and PT-TG were measured by three examiners in 31 knees...
March 31, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/26929798/radiologic-measurement-of-tibial-tuberosity-trochlear-groove-tt-tg-distance-by-lower-extremity-rotational-profile-computed-tomography-in-koreans
#18
Eun Kyoo Song, Jong Keun Seon, Min Cheol Kim, Young-Jun Seol, Seung Hun Lee
BACKGROUND: Tibial tuberosity-trochlear groove (TT-TG) distance is important in the assessment and treatment of patellofemoral disorders. However, normal and pathological TT-TG values have not been established in Koreans. The purpose of this study was to evaluate the TT-TG distance in the Korean population using lower leg rotational profile computed tomography (CT) scans. METHODS: One hundred rotational profile CT scans were retrospectively collected from patients without knee joint problems aged between 25 to 82 years...
March 2016: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/26837641/influence-of-age-on-clinical-outcomes-of-three-dimensional-transfer-of-the-tibial-tuberosity-for-patellar-instability-with-patella-alta
#19
Shuhei Otsuki, Mikio Nakajima, Kenta Fujiwara, Yoshinori Okamoto, Go Iida, Tomohiko Murakami, Masashi Neo
PURPOSE: To evaluate the clinical outcomes of three-dimensional (3D) transfer of the tibial tuberosity for patellar instability with patella alta, with a focus on the influence of age at initial surgery. METHODS: Three-dimensional surgery was performed on 28 knees with a mean follow-up of 46 months. Patients were separated into three groups based on the age at initial surgery: group A, 10 knees and an average age of 16.3 ± 1.8 (14-19) years; group B, 10 knees and an average age of 22...
February 2, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/26803695/anteromedialisation-tibial-tubercle-osteotomy-for-recurrent-patellar-instability-in-young-active-patients-a-retrospective-case-series
#20
David Y Ding, Raymond Kanevsky, Eric J Strauss, Laith M Jazrawi
INTRODUCTION: Recurrent patellar instability can be a source of continued pain and functional limitation in the young, active patient population. Instability in the setting of an elevated tibial tubercle-trochlear groove (TT-TG) distance can be effectively managed with a tibial tubercle osteotomy. At the present time, clinical outcome data are limited with respect to this surgical approach to patellar instability. METHODS: A retrospective chart review was performed to identify all cases of tibial tubercle osteotomy for the management of patellar instability performed at our institution with at least 1 year of post-operative follow-up...
March 2016: Injury
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