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"Total knee arthroplasty"

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https://www.readbyqxmd.com/read/29779140/knee-motion-symmetry-was-not-restored-in-patients-with-unilateral-bi-cruciate-retaining-total-knee-arthroplasty-in-vivo-three-dimensional-kinematic-analysis
#1
Paul Arauz, Yun Peng, Young-Min Kwon
PURPOSE: Although unilateral total knee arthroplasty (TKA) is successful in restoring function, there are concerns in relation to asymmetric gait patterns. Bi-cruciate retaining (BCR) TKA design preserves both anterior and posterior cruciate ligaments with the potential to restore normal joint kinematics. The purpose of this study was to investigate the in vivo three-dimensional (3D) kinematics of the knee in unilateral BCR TKA patients during gait. METHODS: Twenty-nine unilateral BCR TKA patients were evaluated for both knees during treadmill gait using a combined computer tomography and dual fluoroscopic imaging system approach...
May 19, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29778657/efficacy-of-antifungal-impregnated-cement-spacer-against-chronic-fungal-periprosthetic-joint-infections-after-total-knee-arthroplasty
#2
Jong-Keun Kim, Do-Yoon Lee, Dong-Wan Kang, Du-Hyun Ro, Myung Chul Lee, Hyuk-Soo Han
BACKGROUND: Although two-stage exchange arthroplasty is considered a treatment of choice for chronic features of fungal PJI (periprosthetic joint infection), there is no consensus for local use of antifungal agent. The purpose of this study was to evaluate the efficacy of antifungal-impregnated cement spacer (AICS). METHODS: Nine patients who were diagnosed and treated for chronic fungal PJI after TKA in a single center from January 2001 to December 2016 were enrolled...
May 16, 2018: Knee
https://www.readbyqxmd.com/read/29778656/laxity-and-contact-forces-of-total-knee-designed-for-anatomic-motion-a-cadaveric-study
#3
Gaia Salvadore, Patrick A Meere, Matthias A Verstraete, Jan Victor, Peter S Walker
BACKGROUND: Total knee designs that attempt to reproduce more physiological knee kinematics are gaining attention given their possible improvement in functional outcomes. This study examined if a total knee designed for anatomic motion, where the soft tissue balancing was intended to replicate anatomical tibiofemoral contact forces, can more closely reproduce the laxity of the native knee. METHODS: In an ex-vivo setting, the laxity envelope of the knees from nine lower extremity specimens was measured using a rig that reproduced surgical conditions...
May 16, 2018: Knee
https://www.readbyqxmd.com/read/29778655/deviation-of-femoral-intramedullary-alignment-rod-influences-coronal-and-sagittal-alignment-during-total-knee-arthroplasty
#4
Yohei Haruta, Shinya Kawahara, Kanenobu Tsuchimochi, Akihiko Hamasaki, Toshihiko Hara
BACKGROUND: An intramedullary (IM) rod is used to resect the distal femur vertically to the femoral mechanical axis in the coronal plane in many cases of total knee arthroplasties (TKA). The valgus angle between the mechanical axis and the anatomical axis of the distal femur is estimated preoperatively. It is known the deviation of the IM rod in the femoral canal could influence the femoral component alignment. However, there is no published data regarding how many degrees of deviation to make with the IM rod...
May 16, 2018: Knee
https://www.readbyqxmd.com/read/29776855/incidence-and-risk-factors-of-kinesiophobia-after-total-knee-arthroplasty-in-zhengzhou-china-a-cross-sectional-study
#5
Libai Cai, Yanjin Liu, Huiping Xu, Qiulu Xu, Yanyan Wang, Peihua Lyu
BACKGROUND: The incidence of and risk factors for kinesiophobia after total knee arthroplasty (TKA) have not been well characterized in the literature. Thus, the aim of this study was to investigate the incidence of postoperative kinesiophobia among patients undergoing TKA and to identify the associated risk factors. METHODS: The simplified Chinese version of the Tampa Scale for Kinesiophobia, Knee Self-Efficacy Scale, Numerical Rating Scale, Simplified Coping Style Questionnaire, and Social Support Rating Scale were used to measure kinesiophobia, self-efficacy, pain intensity, coping styles and social support, respectively...
April 23, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29776854/comparison-of-functional-outcomes-between-the-first-and-second-knee-in-staged-bilateral-total-knee-arthroplasty-with-diverse-intervals-between-stages
#6
Alejandro Lizaur-Utrilla, Ricardo Serna-Berna, Maria F Vizcaya-Moreno, Daniel Martinez-Mendez, Luis Marco-Gomez, Fernando A Lopez-Prats
BACKGROUND: The objective of the study was to analyze if the length of interval time between stages influenced functional and quality of life outcomes in patients with staged bilateral primary total knee arthroplasty (TKA). METHODS: This is a retrospective comparative study between 93 patients with an interval between stages of 6-8 months (6-month group), 112 of 12-14 months (1-year group), and 108 of 24-26 months (2-year group). Outcome variables were Knee Society scores, Western Ontario and McMaster Universities, Short Form, and patient satisfaction...
April 25, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29776853/outcomes-of-a-fixed-bearing-medial-cemented-unicondylar-knee-arthroplasty-design-survival-analysis-and-functional-score-of-460-cases
#7
Philip Winnock de Grave, Justine Barbier, Thomas Luyckx, Alexander Ryckaert, Paul Gunst, Luc Van den Daelen
BACKGROUND: Unicompartmental knee arthroplasty (UKA) is an alternative to total knee arthroplasty in isolated medial osteoarthritis (OA). However, despite satisfactory reports on the clinical performance, UKA revision rates are still concerning. This retrospective study reports on the long-term survivorship, functional outcomes, and reasons for revision in fixed-bearing UKA implant. METHODS: Between 2005 and 2013, 460 consecutive patients were treated with medial UKA in one center using a fixed-bearing UKA system...
April 24, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29776814/metallosis-in-cemented-titanium-alloy-total-knee-arthroplasty-without-apparent-metal-on-metal-articulation
#8
James Ho, John Mahajan, Martin Taylor, Ashlyn Byers, Paul Arauz, Young-Min Kwon
BACKGROUND: Metallosis is an uncommon phenomenon observed in late failures of cemented total knee arthroplasty (TKA), and it is rarely seen in the absence of metal-on-metal articulation. METHODS: We report the case of a TKA patient with cemented titanium-alloy components and a polyethylene patella that was revised for early loosening with intra-operative severe metallosis. RESULTS: We found that loosening and severe metallosis were associated with methacrylate particle abrasion on titanium alloy surfaces...
May 16, 2018: Knee
https://www.readbyqxmd.com/read/29775976/-are-there-any-differences-in-quality-or-complication-rate-in-total-knee-arthroplasty-after-establishing-a-centre-for-endoprosthesis
#9
Muzaffer Düzgünoglu, Wolfgang Hönle, Alexander Scheller, Alexander Schuh
BACKGROUND: The aim of the study is to show whether there are any changes in quality or incidence of complications in total knee arthroplasty (TKA) after establishing a centre for endoprothesis (EPZ). MATERIAL AND METHODS: We conducted a retrospective study comparing 100 TKAs one year before establishing an EPZ (Group I) with 100 TKAs one year after establishing an EPZ (group II). Data were collected by analysing our electronic documentation system, and the report of the rehabilitation hospital...
May 18, 2018: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/29773405/gender-differences-in-knee-morphology-and-the-prospects-for-implant-design-in-total-knee-replacement
#10
Malte Asseln, Christoph Hänisch, Fabian Schick, Klaus Radermacher
BACKGROUND: Morphological differences between female and male knees have been reported in the literature, which led to the development of so-called gender-specific implants. However, detailed morphological descriptions covering the entire joint are rare and little is known regarding whether gender differences are real sexual dimorphisms or can be explained by overall differences in size. METHODS: We comprehensively analysed knee morphology using 33 features of the femur and 21 features of the tibia to quantify knee shape...
May 14, 2018: Knee
https://www.readbyqxmd.com/read/29773404/large-tibial-geode-which-developed-several-years-after-a-left-medial-oxford-unicondylar-knee-arthroplasty-treated-with-curettage-and-bone-grafting
#11
Matthew K Curran, James R Murray
BACKGROUND: Tibial geodes are rare, and usually reported in association with rheumatoid arthritis. This case study reported the rare occurrence of a tibial geode in association with a left unicondylar knee arthroplasty (UKA). The patient, a 55-year-old male, was initially pleased with his UKA, which was performed at another institution. However, just over one year after the operation he began experiencing pain and discomfort. He did not present to the current institution until he was six years after UKA...
May 14, 2018: Knee
https://www.readbyqxmd.com/read/29773278/medial-tibial-periprosthetic-bone-resorption-and-its-effect-on-clinical-outcomes-after-total-knee-arthroplasty-cobalt-chromium-vs-titanium-implants
#12
Chan Yoon, Moon Jong Chang, Chong Bum Chang, Min Kyu Song, Jae Hoon Shin, Seung-Baik Kang
BACKGROUND: Recently, concerns arose over the medial tibial bone resorption of a novel cobalt-chromium implant. This study aimed at investigating the effects of tibial component material, design, and patient factors on periprosthetic bone resorption and at determining its association with clinical outcomes after total knee arthroplasty (TKA). METHODS: A total of 462 primary TKAs using 5 types of implants were included. To evaluate tibial periprosthetic bone resorption, we assessed radiolucent lines and change in bone mineral density at the medial tibial condyle (BMDMT )...
April 23, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29773277/-thicker-polyethylene-bearings-are-not-associated-with-higher-failure-rates-in-primary-total-knee-arthroplasty
#13
Nicholas J Greco, David A Crawford, Keith R Berend, Joanne B Adams, Adolph V Lombardi
BACKGROUND: Despite improvements in polyethylene bearing surface properties, only 1 previous study has examined the results of larger thickness bearings. The purpose of this study was to determine whether polyethylene thickness influenced patient outcomes and implant survival following modular total knee arthroplasty. METHODS: A retrospective review was performed of patients undergoing primary total knee arthroplasty from 2003 to 2014 in a single practice database...
April 23, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29772995/bilateral-spontaneous-quadriceps-tendon-ruptures-after-staged-bilateral-total-knee-arthroplasties-a-case-report
#14
Marine Coste, Jared M Newman, Neil V Shah, Ahmed M Eldib, Preston W Grieco, Aditya V Maheshwari
Quadriceps tendon ruptures are rare complications of total knee arthroplasty (TKA) and may be associated with preexisting tendon degeneration, vascular injuries during surgery, damage to the quadriceps tendon with over resection of the patella, or incomplete healing after a particular surgical approach. Moreover, postoperative causes include tissue necrosis due to component malalignment, trauma, and infection. Patient factors such as chronic systemic diseases, medications, increased body weight, and sedentary lifestyle could also be responsible...
2018: Journal of Long-term Effects of Medical Implants
https://www.readbyqxmd.com/read/29772993/shoulder-lesion-in-a-69-year-old-woman
#15
Andrew J Hayden, Srinivas Kolla, Adele L Boskey, Steven Burekhovich, Chuanyong Lu, Michael Stracher, Aditya V Maheshwari
Milwaukee Shoulder Syndrome (MSS) is a painful progressive arthropathy in which hydroxyapatite crystal deposition in synovial tissue induces lysosomal release of collagenase and neutral proteases. These enzymes are destructive to periarticular tissue, including the synovium, articular cartilage, rotator cuff muscles, and the intrasynovial cortical bone. MSS predominantly occurring in women (90%) over the age of 70 years of age with a clinical history marked by recurrent joint effusions and pain, which classically worsens at night...
2018: Journal of Long-term Effects of Medical Implants
https://www.readbyqxmd.com/read/29770878/slight-under-correction-following-total-knee-arthroplasty-for-a-valgus-knee-results-in-similar-clinical-outcomes
#16
Sung-Sahn Lee, Hyeon Lee, Dae-Hee Lee, Young-Wan Moon
BACKGROUND: Restoration of correct coronal alignment is one of the main goals of total knee arthroplasty (TKA). Traditionally, TKA has been considered successful when a neutral mechanical hip-knee-ankle (HKA) axis within 3° is achieved. Recent studies have reported no differences or improved clinical outcomes following a slight under-correction of the HKA axis for a varus knee. However, the influence of under-correction of a valgus knee has not been reported. This study investigated the influence of post-operative HKA alignment in TKA patients with valgus deformity on clinical outcomes...
May 16, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29770589/short-term-follow-up-of-antibiotic-loaded-articulating-cement-spacers-in-two-stage-revision-of-infected-total-knee-arthroplasty-a-case-series
#17
Meng-Qiang Tian, Xian-Teng Yang, Xiao-Bin Tian, Yun-Bo Sun, Yuan-Hui Duan, Li Sun
OBJECTIVE: Infection of total knee arthroplasty (TKA) is a rare but devastating complication. Two-stage revision is an effective treatment for late infected TKA. This study aimed to assess the short-term results of two-stage revision using articulating antibiotic-loaded spacers. METHODS: Twenty-five patients (10 men and 15 women) were diagnosed with late infections after TKA and treated with two-stage revision from April 2006 to August 2010; 19 of these patients had TKA for osteoarthritis and 6 for rheumatoid arthritis...
May 17, 2018: Orthopaedic Surgery
https://www.readbyqxmd.com/read/29770226/massive-haemorrhagic-blister-formation-following-total-knee-arthroplasty
#18
Aadhar Sharma, Padmanabhan Subramanian, Sunil Shah, Mohan Remani, Muhammad Shahid
Skin blistering following trauma is not uncommon; however, large haemorrhagic bullous blisters following total knee arthroplasty is relatively rare and not widely documented in the literature.
May 2018: JRSM Open
https://www.readbyqxmd.com/read/29769146/finite-element-analysis-of-the-tibial-bone-graft-in-cementless-total-knee-arthroplasty
#19
Koji Totoribe, Etsuo Chosa, Go Yamako, Hiroaki Hamada, Koki Ouchi, Shutaro Yamashita, Gang Deng
BACKGROUND: Achieving stability of the tibial implant is essential following cementless total knee arthroplasty with bone grafting. We investigated the effects of bone grafting on the relative micromotion of the tibial implant and stress between the tibial implant and adjacent bone in the immediate postoperative period. METHODS: Tibial implant models were developed using a nonlinear, three-dimensional, finite element method. On the basis of a preprepared template, several bone graft models of varying sizes and material properties were prepared...
May 16, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29769140/local-infiltration-anesthesia-versus-epidural-analgesia-for-postoperative-pain-control-in-total-knee-arthroplasty-a-systematic-review-and-meta-analysis
#20
Chen Li, Ji Qu, Su Pan, Yang Qu
BACKGROUND: We performed a systematic review and meta-analysis of randomized controlled trials (RCTs) to evaluate the efficacy and safety of local infiltration anesthesia (LIA) versus epidural analgesia (EPA) for postoperative pain control in total knee arthroplasty (TKA). METHODS: In December 2017, a systematic computer-based search was conducted in Pubmed, EMBASE, Web of Science, and Cochrane Database of Systematic Reviews. RCTs of patients prepared for spine surgery that compared LIA versus EPA for postoperative pain control in TKA were retrieved...
May 16, 2018: Journal of Orthopaedic Surgery and Research
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