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https://www.readbyqxmd.com/read/29667926/proximal-tibia-stress-fracture-with-osteoarthritis-of-knee-radiological-and-functional-analysis-of-one-stage-tka-with-long-stem
#1
Dhanasekaran Soundarrajan, Natesan Rajkumar, Palanisamy Dhanasekararaja, Shanmuganathan Rajasekaran
INTRODUCTION: Proximal tibia stress fractures with knee osteoarthritis pose a challenging situation. We evaluated the radiological and functional outcome of one-stage total knee arthroplasty (TKA) and long stem for patients with varied grades of knee arthritis and proximal tibia stress fractures.  Methods: We analysed 20 patients from April 2012 to March 2017 with proximal tibia stress fractures associated with knee osteoarthritis of varied grades. Out of 20 patients, five were acute fresh fractures...
2018: SICOT-J
https://www.readbyqxmd.com/read/29667852/determination-of-the-position-of-the-knee-at-the-time-of-an-anterior-cruciate-ligament-rupture-for-male-versus-female-patients-by-an-analysis-of-bone-bruises
#2
Kwadwo A Owusu-Akyaw, Sophia Y Kim, Charles E Spritzer, Amber T Collins, Zoë A Englander, Gangadhar M Utturkar, William E Garrett, Louis E DeFrate
BACKGROUND: The incidence of anterior cruciate ligament (ACL) ruptures is 2 to 4 times higher in female athletes as compared with their male counterparts. As a result, a number of recent studies have addressed the hypothesis that female and male patients sustain ACL injuries via different mechanisms. The efficacy of prevention programs may be improved by a better understanding of whether there are differences in the injury mechanism between sexes. Hypothesis/Purpose: To compare knee positions at the time of a noncontact ACL injury between sexes...
April 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29666082/knee-joint-instability-after-total-knee-replacement-in-a-patient-with-ehlers-danlos-syndrome-the-role-of-insert-changes-as-practical-solution
#3
Ajmal Farid, Stefan Beekhuizen, Joris van der Lugt, Marijn Rutgers
Treatment of knee joint instability in patients with hypermobile Ehlers-Danlos syndrome (EDS) can be challenging. A 53-year-old woman with hypermobile EDS underwent bilateral total knee replacement (TKR) due to valgus osteoarthritis. During follow-up, she developed hypermobility of both knee replacements. Revision of the insert resolved the issue in her left knee; however, the right TKR required two insert exchanges and unfortunately instability persisted. Therefore, a revision to a constrained prosthesis was performed...
April 17, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29661570/is-hip-strengthening-the-best-treatment-option-for-females-with-patellofemoral-pain-a-randomized-controlled-trial-of-three-different-types-of-exercises
#4
Marcelo Camargo Saad, Rodrigo Antunes de Vasconcelos, Letícia Villani de Oliveira Mancinelli, Matheus Soares de Barros Munno, Rogério Ferreira Liporaci, Débora Bevilaqua Grossi
OBJECTIVE: To evaluate the effect of three types of exercise intervention in patients with patellofemoral pain and to verify the contributions of each intervention to pain control, function, and lower extremity kinematics. METHODS: A randomized controlled, single-blinded trial was conducted. Forty women with patellofemoral pain were randomly allocated into four groups: hip exercises, quadriceps exercises, stretching exercises and a control group (no intervention)...
April 4, 2018: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/29659401/effects-of-different-footwear-properties-and-surface-instability-on-neuromuscular-activity-and-kinematics-during-jumping
#5
Melanie Lesinski, Olaf Prieske, Ron Borde, Rainer Beurskens, Urs Granacher
Lesinski, M, Prieske, O, Borde, R, Beurskens, R, and Granacher, U. Effects of different footwear properties and surface instability on neuromuscular activity and kinematics during jumping. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to examine sex-specific effects of different footwear properties vs. barefoot condition during the performance of drop jumps (DJs) on stable and unstable surfaces on measures of jump performance, electromyographic (EMG) activity, and knee joint kinematics...
April 13, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29629916/distal-femoral-varus-osteotomy-for-the-management-of-valgus-deformity-of-the-knee
#6
Seth L Sherman, Samuel F Thompson, John C F Clohisy
Distal femoral varus osteotomy is a well-described treatment option for patients with valgus malalignment associated with a variety of underlying conditions. This procedure may be the definitive treatment option in active patients with isolated lateral compartment osteoarthritis or posttraumatic arthritis. It may be a useful concomitant procedure in young patients with lateral meniscus deficiency, focal chondral defects, chronic medial collateral ligament insufficiency, and/or patellofemoral instability. Distal femoral varus osteotomy can be performed with medial closing wedge or lateral opening wedge techniques...
April 6, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/29618147/where-is-the-target-point-to-prevent-cortical-hinge-fracture-in-medial-closing-wedge-distal-femoral-varus-osteotomy
#7
Kyung-Wook Nha, Yong Suk Chang, Oog-Jin Shon, Bum-Jin Shim, Jong Seong Lee, Jun Seop Song, Ji-Hoon Bae
The purpose of this study was to investigate whether the location of the hinge affects the incidence of hinge fracture during medial closing-wedge distal femoral varus osteotomy (DFVO). Twenty knees from 10 fresh-frozen human cadavers (mean age, 75 ± 17 years) were used to perform uniplanar medial closing-wedge DFVO with a 7-mm wedge. Each specimen was randomly assigned to either group A (supracondylar hinge) or group B (lateral condylar hinge). The incidence of hinge fracture and stability was compared between both groups after uniplanar medial closing-wedge DFVO...
April 4, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29613928/the-effect-of-an-acl-reconstruction-in-controlling-rotational-knee-stability-in-knees-with-intact-and-physiologic-laxity-of-secondary-restraints-as-defined-by-tibiofemoral-compartment-translations-and-graft-forces
#8
Frank R Noyes, Lauren E Huser, Martin S Levy
BACKGROUND: The effect of an anterior cruciate ligament (ACL) reconstruction on restoring normal knee kinematics in unstable knees with physiologic laxity of secondary ligamentous restraints remains unknown. The purpose of this study was to determine the stabilizing function of an ACL reconstruction and the resulting ACL graft forces in knees with severely abnormal anterior subluxation due to associated laxity of secondary restraints. METHODS: A 6-degree-of-freedom robotic simulator was used to test 21 cadaveric knees studied as a whole and in subgroups of lax secondary restraints (Lax-SR) and intact secondary restraints (Intact-SR), based on abnormal translations and tibial rotations...
April 4, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29605558/navigated-versus-conventional-total-knee-arthroplasty-a-prospective-study-at-three-years-follow-up
#9
C Martín-Hernández, M Sanz-Sainz, C Revenga-Giertych, D Hernández-Vaquero, J M Fernández-Carreira, J Albareda-Albareda, A Castillo-Palacios, M Ranera-Garcia
OBJECTIVE: Computer-assisted surgery application in total knee arthroplasty (TKA) has shown more accurate implant alignment compared with conventional instrumentation and is associated with more homogeneous alignment results. Although longer implant survival and superior clinical outcomes should be expected from navigated TKA, currently available evidence does not support this hypothesis. The aim of this study was to compare navigated TKA with conventional TKA regarding clinical and radiological outcomes after a 3-year follow-up under the hypothesis that navigated TKA would provide better outcomes than conventional TKA...
March 28, 2018: Revista Española de Cirugía Ortopédica y Traumatología
https://www.readbyqxmd.com/read/29594324/under-corrected-knees-do-not-fail-more-than-aligned-knees-at-8-years-in-fixed-severe-valgus-total-knee-replacement
#10
Bertrand Boyer, Régis Pailhé, Nassima Ramdane, David Eichler, Franck Remy, Matthieu Ehlinger, Gilles Pasquier
PURPOSES: A fixed severe valgus knee is a surgical challenge. A safe post-operative Hip-Knee-Ankle angle (HKA) range of 180° ± 4 was recommended, but recent studies mentioned equal results from outliers of this range. Nevertheless, no distinction was made between varus and valgus knees, as well as over-corrected or under-corrected knees. Did post-operative nonaligned total knee replacements (TKR) from fixed severe valgus knees behave differently from the properly aligned population? Did over-corrected knees behave differently from under-corrected knees? METHODS: Through a multi-center retrospective cohort study, we provided 557 knees of at least 10° of minimal pre-operative valgus; in this population 75 presented a post-operative Hip-Knee-Ankle angle (HKA) outside of the 180° ± 4 range; 23 of them had at least 5° of varus; 52 of them had at least 5° of valgus...
March 28, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29593820/prophylaxis-of-medial-compartment-gonarthrosis-in-varus-knee-current-state-of-knowledge
#11
Anna Fryzowicz, Lechosław B Dworak, Paweł Koczewski
The progression of gonarthrosis results in reduction of physical activity. One of the factors that increase the risk of osteoarthrosis may be joint overload related to the malalignment of the mechanical axis of the lower extremity. The medial compartment (MC) of the knee is particularly susceptible to overload due to the external knee adduction moment (EKAM). Varus knee malalignment contributes to increased EKAM and thus results in increased MC loading. The purpose of this study is to present methods described in current literature aimed at reducing the disproportion in the distribution of loads on articular surfaces of medial and lateral knee compartments in people with varus knee malalignment...
March 2018: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/29589953/ten-year-results-of-medial-open-wedge-high-tibial-osteotomy-and-chondral-resurfacing-in-severe-medial-osteoarthritis-and-varus-malalignment
#12
Philipp Schuster, Markus Geßlein, Michael Schlumberger, Philipp Mayer, Raul Mayr, Damian Oremek, Sebastian Frank, Martin Schulz-Jahrsdörfer, Jörg Richter
BACKGROUND: High tibial osteotomy (HTO) is a widely used treatment option for medial osteoarthritis and varus malalignment, especially in young patients with early osteoarthritis. Limited outcome data are available for this procedure in severe osteoarthritis, and no long-term data are available using newer implants. PURPOSE: To determine survivorship and functional results of medial open-wedge HTO combined with a chondral resurfacing (CR) procedure (abrasion plus microfracture) in severe medial osteoarthritis (Kellgren-Lawrence grade 3 and 4) and varus malalignment...
March 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29589046/-surgical-therapy-of-ischiofemoral-impingement-by-lateralizing-intertrochanteric-osteotomy
#13
REVIEW
C Suren, R Burgkart, I J Banke, G Hertel, J Schauwecker, R von Eisenhart-Rothe, H Gollwitzer
OBJECTIVE: Lateralizing, derotating intertrochanteric varus osteotomy to increase the ischiofemoral space to counter painful impingement of the lesser trochanter and the os ischium with resulting entrapment of quadratus femoris muscle. INDICATIONS: Symptomatic ischiofemoral impingement (IFI) caused by Coxa valga et antetorta, Coxa valga or Coxa antetorta, or a short femoral neck. CONTRAINDICATIONS: Anatomic configuration suggestive of IFI in asymptomatic patients...
March 27, 2018: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/29582097/native-rotational-knee-kinematics-is-restored-after-lateral-uka-but-not-after-medial-uka
#14
Keizo Wada, Daisuke Hamada, Tomoya Takasago, Akihiro Nitta, Tomohiro Goto, Ichiro Tonogai, Yoshihiro Tsuruo, Koichi Sairyo
PURPOSE: The aim of this study was to compare the intraoperative kinematics of medial and lateral unicompartmental knee arthroplasty (UKA) with those of the native knee using a navigation system. METHODS: Six fresh-frozen cadaveric knees were included in the study. Medial UKA was performed in all right knees and lateral UKA was performed in all left knees. All UKA procedures were performed with a computerised navigation system. The tibial internal rotation angle and coronal alignment of the mechanical axis during passive knee flexion were assessed as rotational and varus/valgus kinematics before and after surgery using the navigation system...
March 26, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29578473/medial-collateral-ligament-bursitis-in-a-patient-with-knee-osteoarthritis
#15
Hakan Nur, Ayca Aytekin, Erdal Gilgil
BACKGROUND: Medial collateral ligament (MCL) bursitis has been described as a distended and inflamed bursa between the superficial and deep portions of the MCL. It is a rare but important cause of medial knee pain. CASE DESCRIPTION: A 65-year-old woman with knee osteoarthritis (OA) presented with severe pain and swelling in her left knee. She didn't have a traumatic injury. After a clinical examination, a slight decrease in the range of motion of the left knee, and a painful swelling and tenderness over the medial side of the knee and proximal tibia were detected...
March 16, 2018: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/29567569/ipsilateral-stress-fracture-of-the-proximal-fibula-after-total-knee-arthroplasty-in-a-patient-with-severe-valgus-knee-deformity-on-a-background-of-rheumatoid-arthritis
#16
Hirokazu Takai, Sakumo Kii, Masatoshi Murayama, Nobutake Nakane, Tomoki Takahashi
INTRODUCTION: Previous studies have reported a lower extremity stress fracture after total knee arthroplasty (TKA). However, a fibular fracture after TKA is quite rare. We report a case of proximal fibula fracture after TKA in a patient with rheumatoid arthritis (RA). PRESENTATION OF CASE: A 45 year old woman with RA had severe knee and foot pain with an antalgic gait disturbance. There was a significant joint deformity in many of lower limb joints. Interval bilateral TKAs were performed two weeks apart...
March 2, 2018: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29560494/frontal-plane-tibiofemoral-alignment-is-strongly-related-to-compartmental-knee-joint-contact-forces-and-muscle-control-strategies-during-stair-ascent
#17
Hunter J Bennett, Joshua T Weinhandl, Kristina Fleenor, Songning Zhang
Static frontal plane tibiofemoral alignment is an important factor in dynamic knee alignment and knee adduction moments. However, little is known about the relationship between alignment and compartment contact forces or muscle control strategies. The purpose of this study was to estimate medial (MCF) and lateral (LCF) compartment knee joint contact forces and muscle forces during stair ascent using a musculoskeletal model implementing subject specific knee alignments. Kinematic and kinetic data from 20 healthy individuals with radiographically confirmed varus or valgus knee alignments were simulated using alignment specific models to predict MCFs and LCFs...
March 12, 2018: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29560400/a-computer-assisted-tibia-first-technique-for-improved-femoral-component-rotation-in-total-knee-arthroplasty
#18
Chong Meng Lee, Malkit K Dhillon, Mohd Amin Sulaiman
Background: The use of navigation for total knee arthroplasty (TKA) improves limb alignment in the coronal and sagittal planes. However, similar improvements in femoral and tibial component rotation have not yet been realized using currently available systems. Methods: We developed a modified navigated TKA technique in which femoral rotation was set using the resected tibial plane as the reference with the aim of achieving a rectangular flexion gap. Limb alignment was assessed in a cohort of 30 knees using the navigation system...
March 2018: Arthroplasty Today
https://www.readbyqxmd.com/read/29558208/anterolateral-knee-extra-articular-stabilizers-a-robotic-sectioning-study-of-the-anterolateral-ligament-and-distal-iliotibial-band-kaplan-fibers
#19
Andrew G Geeslin, Jorge Chahla, Gilbert Moatshe, Kyle J Muckenhirn, Bradley M Kruckeberg, Alex W Brady, Ashley Coggins, Grant J Dornan, Alan M Getgood, Jonathan A Godin, Robert F LaPrade
BACKGROUND: The individual kinematic roles of the anterolateral ligament (ALL) and the distal iliotibial band Kaplan fibers in the setting of anterior cruciate ligament (ACL) deficiency require further clarification. This will improve understanding of their potential contribution to residual anterolateral rotational laxity after ACL reconstruction and may influence selection of an anterolateral extra-articular reconstruction technique, which is currently a matter of debate. Hypothesis/Purpose: To compare the role of the ALL and the Kaplan fibers in stabilizing the knee against tibial internal rotation, anterior tibial translation, and the pivot shift in ACL-deficient knees...
March 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29556687/-correction-of-posttraumatic-deformities-of-the-distal-tibia-with-focal-dome-osteotomy
#20
Thomas Rosteius, Hinnerk Baecker, Thomas Armin Schildhauer, Dominik Seybold, Jan Geßmann
BACKGROUND: Supramalleolar deformities require surgical correction to avoid posttraumatic osteoarthrosis of the knee or ankle joint and to prevent definitive treatment options, such as total ankle arthroplasty or arthrodesis of the ankle joint. Various methods for the operative correction of supramalleolar deformities have been described in the literature. OBJECTIVE: What results can be achieved with focal dome osteotomy to correct posttraumatic supramalleolar deformities? MATERIAL AND METHODS: A total of 10 patients (mean age 37 years) with a supramalleolar posttraumatic deformity were treated by focal dome osteotomy...
March 19, 2018: Der Unfallchirurg
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