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https://www.readbyqxmd.com/read/28056523/the-tibial-tubercle-trochlear-groove-distance-is-greater-in-patients-with-patellofemoral-pain
#1
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/28042121/conversion-of-a-unicompartmental-knee-arthroplasty-to-a-total-knee-arthroplasty-can-we-achieve-a-primary-result
#2
E Thienpont
OBJECTIVES: Unicompartmental knee arthroplasty (UKA) is a potential treatment for isolated bone on bone osteoarthritis when limited to a single compartment. The risk for revision of UKA is three times higher than for total knee arthroplasty (TKA). The aim of this review was to discuss the different revision options after UKA failure. MATERIALS AND METHODS: A search was performed for English language articles published between 2006 and 2016. After reviewing titles and abstracts, 105 papers were selected for further analysis...
January 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28029579/patellar-inversion-180-degree-rotation-of-the-patella-around-its-vertical-axis-within-the-intercondylar-notch
#3
Samarth Mittal, Arkesh M, Vivek Shankar, Swapnil Singh, Pankaj Sharma, Ravi Mittal
BACKGROUND: Dislocation of the patella can occur around its vertical as well as horizontal axis. However, near 180 degree rotation of the patella around its vertical axis within the intercondylar notch without its complete dislocation has never been previously reported to the best of our knowledge. We report one such neglected case along with its management. METHODS: The patient underwent open reduction and de-rotation of patella with repair of the medial and lateral patellar retinacula...
October 28, 2016: Knee
https://www.readbyqxmd.com/read/28028569/functional-testing-and-return-to-sport-following-stabilization-surgery-for-recurrent-lateral-patellar-instability-in-competitive-athletes
#4
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/28018074/simultaneous-posterior-dislocation-of-primary-total-knee-arthroplasty-with-ipsilateral-tibial-shaft-fracture-a-case-report-and-review-of-literature
#5
Alpaslan Öztürk, Yavuz Akalin, Nazan Çevik, Mustafa Çınar Akça
Dislocation following total knee arthroplasty (TKA) is a rare but serious complication. Here, a 74-year-old woman with posterior dislocation of her right cruciate-retaining TKA and ipsilateral tibia diaphysis fracture was presented. She only slipped down on the ground with a quick twist of her right leg. She underwent revision semiconstrained TKA and osteosynthesis of tibial fracture with plate and screw. Her partially avulsed patellar tendon was repaired as well. She was ambulatory with a cane and satisfied with revision operation at last control...
October 2016: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/28018069/bilateral-sequential-knee-dislocation-in-a-patient-with-connective-tissue-disorder-report-of-an-unusual-case-and-lessons-learnt
#6
Waheeb Al-Azzani, Konrad Wronka, James Lewis, Adel Ghandour, Angus Robertson
Tibiofemoral knee dislocation is a rare but serious limb-threatening injury. Without prompt recognition and management, amputation or long-term functional impairment may result. The authors present a case of bilateral sequential knee dislocation, secondary to low-energy trauma, in a patient with Systemic Lupus Erythematosus and antiphospholipid syndrome. Adequate stability was achieved on both occasions by reconstruction of the postero-lateral corner and MCL. During the first reconstruction, ipsi-lateral autograft, as well as hamstring tendons from the contra-lateral side, were used to strengthen the graft...
October 2016: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/28005405/patellofemoral-arthritis-after-lateral-patellar-dislocation
#7
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/28005105/hinged-knee-external-fixator-used-to-reduce-and-maintain-subacute-tibiofemoral-coronal-subluxation
#8
Erik J Geiger, Alexander H Arzeno, Michael J Medvecky
Dislocation of the knee is a rare phenomenon that is becoming increasingly recognized with the expansion of its definition to include knees presenting with multiligament compromise. Hinged external fixators are now considered a viable supplementary treatment option in the management of acute ligament repair or reconstruction but their use in the management of subacute or chronic tibiofemoral dislocations or subluxations is less well defined. We report a case of a hinged-knee external fixator used to facilitate and maintain reduction of a chronic coronal tibial subluxation that presented after repair of an acute knee dislocation with lateral ligament injury secondary to a motor vehicle accident...
November 2016: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28005097/why-do-lateral-unicompartmental-knee-arthroplasties-fail-today
#9
Jelle P van der List, Hendrik A Zuiderbaan, Andrew D Pearle
In large studies, the failure modes of lateral unicompartmental knee arthroplasty (UKA) are usually presented in combination with medial UKA, which is mainly due to low surgical frequency of lateral UKA. Because lateral UKA differs from medial UKA in anatomic and kinematic characteristics, failure modes of lateral UKA should not be presented in combination with medial UKA. Therefore, we performed a systematic review to assess failure modes in lateral UKA and compared failure modes in cohort studies with those found in registry-based studies...
November 2016: American Journal of Orthopedics
https://www.readbyqxmd.com/read/27999505/osteochondral-allograft-transplantation-for-femoral-trochlear-dysplasia
#10
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/27994926/intraarticular-giant-size-angiolipoma-of-the-knee-causing-lateral-patellar-dislocation
#11
Gökhan İlyas, Ali Turgut, Duygu Ayaz, Önder Kalenderer
BACKGROUND: Angiolipomas are benign tumors usually seen in patients during their 2(nd) and 3(rd) decades. The subcutaneous region of the trunk, neck and extremities are the places where they generally settle. There is only one case report on angiolipoma in the knee joint that was resected by arthroscopic procedure in the English literature. CASE REPORT: We present a case of a giant-size multilobular non-infiltrating angiolipoma, extending outside of the right knee joint and causing lateral patellar dislocation in a thirteen-year-old boy...
November 2016: Balkan Medical Journal
https://www.readbyqxmd.com/read/27993444/two-stage-revisions-for-culture-negative-infected-total-knee-arthroplasties-a-five-year-outcome-in-comparison-with-one-stage-and-two-stage-revisions-for-culture-positive-cases
#12
Heng Li, Ming Ni, Xiang Li, Qingmeng Zhang, Xin Li, Jiying Chen
BACKGROUND: Culture-negative periprosthetic joint infection (PJI) is very intractable when dealing with an infected total knee arthroplasty (TKA) patient. Two-stage revision has been proved to be a reliable solution for PJI patients. Whether it is still credible for culture-negative infected patients remains uncertain. METHODS: Our group retrospectively reviewed all total knee revision patients from January 2003 to January 2014, 145 PJI patients were diagnosed as infection with the PJI diagnostic criteria and 129 patients were successfully followed...
December 16, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/27986272/predictors-of-amputation-in-high-energy-forefoot-and-midfoot-injuries
#13
Zachary M Working, Iain Elliott, Lucas S Marchand, Lance G Jacobson, Angela P Presson, Ami Stuart, David L Rothberg, Thomas F Higgins, Erik N Kubiak
INTRODUCTION: High energy injuries to the midfoot and forefoot are highly morbid injury groups that are relatively unstudied in the literature. Patients sustaining injuries of this region are challenging to counsel at the time of injury because so little is known about the short and long term results of these injuries. The purpose of this study was to investigate injury specific factors that were predictive of amputation in patients sustaining high energy midfoot and forefoot injuries...
December 10, 2016: Injury
https://www.readbyqxmd.com/read/27984689/-congenital-knee-dislocation-case-report
#14
C Arvinius, R Luque, C Díaz-Ceacero, F Marco
Congenital knee dislocation is an infrequent condition with unknown etiology. In some cases it occurs as an isolated condition, while in others it coexists with associated conditions or syndromes. The treatment of congenital knee dislocation is driven by the severity and flexibility of the deformity. The literature includes from serial casting or the Pavlik harness to quadriceps tendon plasty or femoral osteotomies. We report herein the case of a congenital dislocation treated with serial casting with a good outcome...
May 2016: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/27976494/clinical-factors-and-expenditures-associated-with-icd-9-cm-coded-trauma-for-the-us-population-a-nationally-representative-study
#15
Clara E Dismuke, Kinfe G Bishu, Samir Fakhry, Rebekah J Walker, Leonard E Egede
BACKGROUND: There is a lack of information on annual healthcare expenditures both per person and for the US population associated with trauma, as identified by ICD-9-CM codes. METHODS: This paper employed a two part model to estimate the unadjusted and adjusted annual per individual expenditures and population burden of trauma exposure for the US population, using a nationally representative survey of medical care expenditures. In addition, we estimated a logit model to examine the demographic and comorbidity factors associated with the likelihood of experiencing trauma...
December 15, 2016: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/27973938/anesthetic-management-of-a-patient-with-ehlers-danlos-syndrome
#16
Naohiro Ohshita, Masahiko Kanazumi, Kaname Tsuji, Hiroaki Yoshida, Shosuke Morita, Yoshihiro Momota, Yasuo M Tsutsumi
We describe the case of a 37-year-old woman who had been diagnosed with Ehlers-Danlos syndrome (EDS) 4 years earlier and was scheduled to undergo removal of synovial chondromatosis in the temporomandibular joint. EDS is a heritable connective tissue disorder and has 6 types. In this case, the patient was classified into EDS hypermobility type. The major clinical feature of this type is joint hypermobility. The patient had sprain or subluxation of the elbows and ankles and dislocation of the knees. Anticipated problems during general anesthesia would be affected by the disease type...
2016: Anesthesia Progress
https://www.readbyqxmd.com/read/27957592/-lateral-unicompartmental-knee-arthroplasty-a-challenge
#17
T Walker, P R Aldinger, M R Streit, T Gotterbarm
OBJECTIVE: Joint surface replacement in the lateral compartment by unicondylar knee arthroplasty. INDICATIONS: Lateral unicompartmental osteoarthritis of the knee joint, avascular necrosis of the lateral femoral condyle. CONTRAINDICATIONS: Full thickness cartilage defect in the central part of the medial compartment or in the medial aspect of the patellofemoral joint. Instability/contracture of cruciate and collateral ligaments, valgus deformity >15°, valgus deformity not passively correctable, flexion deformity >15°, an intraoperative flexion <100°, failed upper tibial osteotomy, rheumatoid arthritis...
December 12, 2016: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/27941170/management-of-traumatic-patellar-dislocation-in-a-regional-hospital-in-hong-kong
#18
H L Lee, W P Yau
INTRODUCTION: The role of surgery for acute patellar dislocation without osteochondral fracture is controversial. The aim of this study was to report the short-term results of management of patellar dislocation in our institute. METHODS: Patients who were seen in our institution with patella dislocation from January 2011 to April 2014 were managed according to a standardised management algorithm. Pretreatment and 1-year post-treatment International Knee Documentation Committee score, Tegner activity level scale score, and presence of apprehension sign were analysed...
December 12, 2016: Hong Kong Medical Journal, Xianggang Yi Xue za Zhi
https://www.readbyqxmd.com/read/27919583/comparison-of-total-hip-arthroplasty-with-and-without-femoral-shortening-osteotomy-for-unilateral-mild-to-moderate-high-hip-dislocation
#19
Huiwu Li, Jiawei Xu, Xinhua Qu, Yuanqing Mao, Kerong Dai, Zhenan Zhu
BACKGROUND: This study compares the outcome between THA with and without femoral shortening osteotomy for unilateral mild to moderate high hip dislocation in developmental dysplasia of the hip patients. METHODS: The data on 42 hips in 42 patients who had undergone THA for unilateral mild to moderate high hip dislocation were retrospectively reviewed after being prospectively collected. In 22 patients, hips were reduced by soft tissue release and direct leverage using an elevator, without the osteotomy...
August 26, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27916579/distal-patellar-tendon-avulsion-in-association-with-high-energy-knee-trauma-a-case-series-and-review-of-the-literature
#20
Brian Capogna, Eric Strauss, Sanjit Konda, Alan Dayan, Michael Alaia
BACKGROUND: Patellar tendon rupture is rare in the general population. Typically, failure occurs proximally or at the mid-substance. Distal avulsion from the tibial tubercle in adults is rare and not well described in the orthopedic literature. METHODS: We present the largest series of patients with distal patellar tendon injury with associated multi-ligamentous disruption of the knee. A series of six patients with distal patellar tendon avulsion were identified at a single institution...
December 1, 2016: Knee
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