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https://www.readbyqxmd.com/read/29228407/-sport-after-total-knee-and-hip-arthroplasty
#1
Friedrich Boettner, Maximilian F Kasparek, Kilian Rueckl, Christian Liebau
The introduction of new materials and better implant coatings seems to provide the prerequisites for more intense physical activities after total joint arthroplasties of the lower extremity. Despite recent advances in implant design and materials, recommendations for sport after total joint arthroplasty have not been updated over the past 20 years. The introduction of modern uncemented fixation as well as highly cross-linked polyethylene into total hip arthroplasty allow for a more active life-style without an increased risk of loosening or complications...
December 2017: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/29227786/novel-anatomical-based-surgical-technique-for-positioning-of-the-patellar-component-in-total-knee-arthroplasty
#2
Chahine Assi, Nadim Kheir, Camille Samaha, Moussa Chamoun, Kaissar Yammine
The patella remains one of the main sources of post-operative complication following total knee arthroplasty surgery. Optimal positioning of the patellar component is still a controversy with no clear-cut guidelines. Instead of choosing an empirical position, we described a novel surgical technique to better locate the patellar button based on the individual patellar anatomy of each patient.
2017: SICOT-J
https://www.readbyqxmd.com/read/29227785/patient-specific-instruments-advantages-and-pitfalls
#3
Mahmoud A Hafez, Kirti Moholkar
Patient-specific instruments (PSI) aim to improve the accuracy of total knee replacement (TKR) based on computer-assisted preoperative planning. In this work, the authors describe the advantages and pitfalls of PSI based on their clinical experience. The main conclusion of this work is that PSI has direct impact on the logistical and technical features of TKR with some advantages and pitfalls.
2017: SICOT-J
https://www.readbyqxmd.com/read/29227730/physical-and-performance-characteristics-related-to-unintentional-musculoskeletal-injury-in-special-forces-operators-a-prospective-analysis
#4
Nicholas R Heebner, John P Abt, Mita Lovalekar, Kim Beals, Timothy C Sell, Jeffery Morgan, Shawn Kane, Scott Lephart
CONTEXT:   Seventy-seven percent of musculoskeletal injuries sustained by United States Army Special Forces Operators are preventable. Identification of predictive characteristics will promote the development of screening methods to augment injury-prevention programs. OBJECTIVE:   To determine physical and performance characteristics that predict musculoskeletal injuries. SETTING:   Clinical laboratory. PATIENTS OR OTHER PARTICIPANTS:   A total of 95 Operators (age = 32...
December 11, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29227374/collateral-ligament-knee-injuries-in-pediatric-and-adolescent-athletes
#5
Dennis E Kramer, Patricia E Miller, Iman K Berrahou, Yi-Meng Yen, Benton E Heyworth
BACKGROUND: The majority of research on medial (MCL) and lateral (LCL) collateral ligament injuries has focused on adults and combined collateral/cruciate injuries. The purpose of this study was to determine characteristics associated with isolated collateral ligament injuries in adolescents, and assess timing for return to sports. METHODS: Electronic medical records were queried to identify patients aged below 17 years who sustained a magnetic resonance imaging-confirmed isolated MCL or LCL injury over an 8-year period...
December 8, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29227373/incidence-of-meniscal-entrapment-and-associated-knee-injuries-in-tibial-spine-avulsions
#6
Jason T Rhodes, Peter C Cannamela, Aristides I Cruz, Meredith Mayo, Alexandra C Styhl, Connor G Richmond, Theodore J Ganley, Kevin G Shea
BACKGROUND: Tibial spine avulsions (TSA) have historically been treated as isolated injuries. Data on associated injuries are limited with existing literature reporting wide ranging incidences. The purpose of this multicenter study was to (1) describe the incidence of meniscal entrapment and associated knee injuries in TSA and to (2) compare surgical and magnetic resonance image (MRI) findings for these injuries. Our hypothesis is that tibial spine injuries are not usually isolated injuries, and other meniscal, ligament, and cartilage injuries may be present...
December 8, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29226725/development-of-a-microcomputed-tomography-scoring-system-to-characterize-disease-progression-in-the-hartley-guinea-pig-model-of-spontaneous-osteoarthritis
#7
Lauren B Radakovich, Angela J Marolf, John P Shannon, Stephen C Pannone, Vanessa D Sherk, Kelly S Santangelo
AIM: There is potential discrepancy between human and laboratory animal studies of osteoarthritis (OA), as radiographic assessment is the hallmark of the former and histopathology the standard for the latter. This suggests a need to evaluate OA in animal models in a manner similar to that utilized in people. Our study aimed to develop a whole joint grading scheme for microcomputed tomography (microCT) images in Hartley guinea pigs, a strain that recapitulates joint changes highlighted in human spontaneous OA...
December 11, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/29226423/patellar-tendinopathy-with-intra-tendinous-alteration-on-mri-may-be-related-to-patellofemoral-dysplasia
#8
Philippe M Tscholl, Roland M Biedert, Florian Wanivenhaus, Sandro F Fucentese
Patellar tendinopathy (PT) is a frequent overuse-injury of the extensor knee apparatus whereas as up to 30% of the athletes might suffer from persisting symptoms during their entire career. In the present case-control study, 47 patients (30.8±11.4 years) with PT with intra-tendinous alteration (PTita) of a minimum of ≥ 25% of the axial surface on MRI and minimum Blazina score of II (pain during without limiting sports activity) were included; MR images were analysed for trochlear geometry, patellar height/tilt, and tibial tubercle trochlear groove distance (TT-TG)...
December 11, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29226208/brucella-arthritis-following-total-knee-arthroplasty-in-a-patient-with-hemophilia-a-case-report
#9
Seyed Mohammad J Mortazavi, Mohammad R Sobhan, Hamed Mazoochy
Total knee arthroplasty (TKA) is a rewarding procedure in patients with hemophilia and end stage knee hemophilic arthropathy. However, this procedure might be associated with complications such as infection. There periprosthetic joint infection in patients with hemophilia is very well known, though we are not aware of any previous report on Brucella infection in this group of patients. Here, we reported a 28-year old man with Brucella infection of total knee replacement who initially underwent a conservative treatment followed bya two-stage revision...
September 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/29226204/single-cut-distal-femoral-varus-osteotomy-scfo-a-preliminary-study
#10
Reza Abdi, Ramin Hajzargarbashi, Mohammad H Ebrahimzadeh
Background: Genu valgum usually originates from a deformity of distal femur that is often corrected by distal femoral varus osteotomy. The osteotomy includes both components of angulationcorrection and translation because the site of osteotomy is not commonly at the apex of deformity. Improvement of patellar tracking not only depends on valgus correction, but also it may be partially due to centralization of the trochlear groove under the femoral anatomical axis (FAA).We asked whether we could accurately correct the deformities based on our preoperative goals for the correction of the mechanical axis and centralization of the trochlear groove under the FAA by using a single bone cut...
September 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/29226201/acute-primary-total-knee-arthroplasty-for-proximal-tibial-fractures-in-elderly
#11
Mohammad M Sarzaeem, Mohammad M Omidian, Gholamhossein Kazemian, Alireza Manafi
Background: Proximal tibial fractures in elderly patients with osteoporosis or knee osteoarthritis (OA) are challenging cases. In the current study, we present our experience with uncommon acute primary total knee arthroplasty (PTKA) in this patient population. Methods: PTKAs were performed following proximal tibial fractures in 30 consecutive patients over 60 years of age with osteoporosis or knee OA between 2005 and 2009. Three constrained condylar knees (CCK) and no hinged knee prosthesis were used...
September 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/29226199/effectiveness-of-minimally-invasive-plate-osteosynthesis-mipo-on-comminuted-tibial-or-femoral-fractures
#12
Ali Andalib, Erfan Sheikhbahaei, Zeynab Andalib, Mohammad A Tahririan
Background: Comminuted fractures happen frequently due to traumas. Fixation without opening the fracture site, known as minimally invasive plate osteosynthesis (MIPO), has recently become prevalent. This study has been designed to assess the outcomes of this treatment for tibial and femoral comminuted fractures. Methods: A total of 60 patients with comminuted femoral or tibial fractures were operated with MIPO method in this cross-sectional study at Alzahra university hospital in 2015...
September 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/29226198/restoration-of-the-mechanical-axis-in-total-knee-artrhoplasty-using-patient-matched-technology-cutting-blocks-a-retrospective-study-of-132-cases
#13
Dimitrios N Lyras, Robert Greenhow, Craig Loucks
Background: The aim of this study is to evaluate the accuracy of bone cuts and the resultant alignment, using the MyKnee patient specific cutting blocks. Methods: We retrospectively reviewed 132 patients undergoing primary TKR for osteoarthritis by one single surgeon. The operative time, the preoperative Hip-Knee-Ankle (HKA) axis based on the CT-scan, the postoperative HKA axis based on long axis standing x-rays, the planned and the actual size of the femoral and the tibial components, and the number of the recuts which has been made intraoperative were measured...
September 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/29226166/a-radiographic-healing-classification-for-osteochondritis-dissecans-of-the-knee-provides-good-interobserver-reliability
#14
David E Ramski, Theodore J Ganley, James L Carey
Background: Recent studies have examined radiographic factors associated with healing of osteochondritis dissecans (OCD) lesions of the knee. However, there is still no gold standard in determining the healing status of an OCD lesion. Purpose: We examined temporally associated patterns of healing to (1) evaluate the practicality of a classification system and (2) elucidate any associations between healing pattern and patient age, sex, lesion location, treatment type, and physeal patency...
December 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29225426/incidence-and-predictors-of-total-knee-arthroplasty-following-knee-arthroscopy
#15
Tristan Camus, Jiho Han, Feroz Osmani, Norman Scott, William J Long
Objective: The purpose of this study was to determine the effectiveness of knee arthroscopy (KA) in patients with symptomatic meniscal tears or mechanical symptoms and OA, by using conversion to TKA as a final outcome measure. Methods: Retrospective review of all patients with OA who underwent KA in our practice. Results: 1215 KAs were reviewed; 3.9% underwent conversion to TKA at an average of 3.2 years. Conclusion: KA plays a role in delaying TKA in knees with meniscal tears and mechanical symptoms with concurrent OA...
March 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29225424/parametric-analysis-of-electromechanical-and-fatigue-performance-of-total-knee-replacement-bearing-with-embedded-piezoelectric-transducers
#16
Mohsen Safaei, R Michael Meneghini, Steven R Anton
Total knee arthroplasty (TKA) is a common procedure in the United States; it has been estimated that about 4 million people are currently living with primary knee replacement in this country. Despite huge improvements in material properties, implant design, and surgical techniques, some implants fail a few years after surgery. A lack of information about in vivo kinetics of the knee prevents the establishment of a correlated intra- and postoperative loading pattern in knee implants. In this study, a conceptual design of an ultra high molecular weight (UHMW) knee bearing with embedded piezoelectric transducers is proposed, which is able to measure the reaction forces from knee motion as well as harvest energy to power embedded electronics...
September 2017: Smart Materials & Structures
https://www.readbyqxmd.com/read/29225329/medial-patellofemoral-ligament-reconstruction-with-semi-patellar-tunnel-fixation-surgical-technique-and-mid-term-follow-up
#17
Jinghui Niu, Qi Qi, Kunpeng Fu, Guman Duan, Chang Liu, Fei Wang
BACKGROUND The present study aimed to describe a new safe and economical technique for medial patellofemoral ligament (MPFL) reconstruction with satisfactory clinical outcomes, and present the results of a four-year follow-up. MATERIAL AND METHODS Thirty-two patients with recurrent patella dislocation, who underwent MPFL reconstruction with two semi-patellar tunnels and hardware-free patellar fixation between 2011 and 2013, were included in the study. Patella stability was tested by an apprehension test preoperatively and at follow-up...
December 11, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29225159/histopathology-of-periarticular-non-hereditary-heterotopic-ossification
#18
REVIEW
Kristin L Foley, Nader Hebela, Mary Ann Keenan, Robert J Pignolo
In the mature adult skeleton, new bone formation is normally restricted to regeneration of osseous tissue at sites of fracture. However, heterotopic ossification, or the formation of bone outside the normal skeleton, can occur within muscle, adipose, or fibrous connective tissue. Periarticular non-hereditary heterotopic ossification (NHHO) may occur after musculoskeletal trauma, following CNS injury, with certain arthropathies, or following injury or surgery that is often sustained in the context of age-related pathology...
December 7, 2017: Bone
https://www.readbyqxmd.com/read/29225019/primary-versus-revision-anterior-cruciate-ligament-reconstruction-patient-demographics-radiographic-findings-and-associated-lesions
#19
Justin J Mitchell, Mark E Cinque, Grant J Dornan, Lauren M Matheny, Chase S Dean, Brad Kruckeberg, Gilbert Moatshe, Jorge Chahla, Robert F LaPrade
PURPOSE: The purpose of this study was to evaluate the differences in intra-articular pathology, demographic characteristics, and radiographic characteristics of the knee associated with primary anterior cruciate ligament reconstruction (ACLR) versus revision ACLR at the time of initial presentation with either a native anterior cruciate ligament tear or an anterior cruciate ligament graft tear. Secondarily, we aimed to investigate risk factors for concomitant medial and lateral meniscal tears and cartilage injuries at the time of ACLR...
December 7, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29225016/posterior-cruciate-ligament-injuries-of-the-knee-at-the-national-football-league-combine-an-imaging-and-epidemiology-study
#20
Catherine A Logan, Brendin R Beaulieu-Jones, George Sanchez, Jorge Chahla, Nicholas I Kennedy, Mark E Cinque, Robert F LaPrade, James M Whalen, Bryan G Vopat, Mark D Price, Matthew T Provencher
PURPOSE: To determine the epidemiology by player position, examination, imaging findings, and associated injuries of posterior cruciate ligament (PCL) injuries in players participating in the National Football League (NFL) Combine. METHODS: All PCL injuries identified at the NFL Combine (2009-2015) were reviewed. Data were obtained from the database organized by the NFL medical personnel for the compilation of the medical and physical performance examination results of NFL Draftees participating in the NFL Combine from 2009 to 2015...
December 7, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
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