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https://www.readbyqxmd.com/read/28716470/early-or-delayed-reconstruction-in-multi-ligament-knee-injuries-a-systematic-review-and-meta-analysis
#1
REVIEW
Erik Hohmann, Vaida Glatt, Kevin Tetsworth
BACKGROUND: Whether early or delayed surgical intervention in patients with multi-ligament injuries results in better outcomes, is of current and controversial debate. PURPOSE: The purpose of this study was to perform a meta-analysis comparing early versus late surgical treatment of multi-ligament knee injuries. METHODS: We performed a systematic review of Medline, Embase, Scopus, and Google Scholar to identify relevant studies in the English and German literature...
July 14, 2017: Knee
https://www.readbyqxmd.com/read/28712710/%C3%A3-tcp-bone-substitutes-in-tibial-plateau-depression-fractures
#2
Tim Rolvien, Florian Barvencik, Till Orla Klatte, Björn Busse, Michael Hahn, Johannes Maria Rueger, Martin Rupprecht
BACKGROUND: The use of beta-tricalciumphospate (ß-TCP, Cerasorb®) ceramics as an alternative for autologous bone-grafting has been outlined previously, however with no study focusing on both clinical and histological outcomes of ß-TCP application in patients with multi-fragment tibial plateau fractures. The aim of this study was to analyze the long-term results of ß-TCP in patients with tibial plateau fractures. METHODS: 52 patients were included in this study...
July 13, 2017: Knee
https://www.readbyqxmd.com/read/28705571/tunnel-widening-after-acl-reconstruction-with-aperture-screw-fixation-or-all-inside-reconstruction-with-suspensory-cortical-button-fixation-volumetric-measurements-on-ct-and-mri-scans
#3
Raul Mayr, Vinzenz Smekal, Christian Koidl, Christian Coppola, Josef Fritz, Ansgar Rudisch, Christof Kranewitter, René Attal
BACKGROUND: Tunnel widening after anterior cruciate ligament reconstruction (ACLR) is influenced by the surgical and fixation techniques used. Computed tomography (CT) is the most accurate image modality for assessing tunnel widening, but magnetic resonance imaging (MRI) might also be reliable for tunnel volume measurements. In the present study tunnel widening after ACLR using biodegradable interference screw fixation was compared with all-inside ACLR using button fixation, with tunnel volume changes being measured on CT and MRI scans...
July 10, 2017: Knee
https://www.readbyqxmd.com/read/28684171/biomechanical-tensile-strength-analysis-for-medial-patellofemoral-ligament-reconstruction
#4
Patrick W Joyner, Jeremy Bruce, Travis S Roth, Frederic Baker Mills, Scott Winnier, Ryan Hess, Luke Wilcox, Aaron Mates, Tim Frerichs, James R Andrews, Charles A Roth
BACKGROUND: Medial patellofemoral ligament (MPFL) reconstruction is a surgery for acute and chronic dislocating patella. Several surgical techniques have been described. No biomechanical study has compared suture anchors, interference screws, and suspensory cortical fixation for MPFL reconstruction using human gracilis allograft. METHODS: Twelve human cadaver knees were used for the analysis of five MPFL reconstruction techniques on the femur (F) and patella (P): suspensory cortical (SC), interference screw (IS) and suture anchor (SA) fixation (SC-F/SC-P, SC-F/IS-P, SC-F/SA-P, IS-F/SC-P, IS-F/IS-P)...
July 3, 2017: Knee
https://www.readbyqxmd.com/read/28673604/no-change-in-patellar-height-following-open-wedge-high-tibial-osteotomy-using-a-novel-femur-referenced-measurement-method
#5
C Ihle, M Ahrend, L Grünwald, A Ateschrang, U Stöckle, S Schröter
BACKGROUND: Open wedge high tibial osteotomy (HTO) can influence the tibial slope and thereby the landmarks of currently used patellar height indices. The purpose of this retrospective study was to compare and validate a new femur-referenced patella height measurement method to currently used patellar height indices in a cohort of HTO patients. METHODS: Patellar height (Caton-Deschamps, Blackburne-Peel and Insall-Salvati Indices and our newly developed Femoral Patellar Height Index) as well as tibial slope were analysed...
June 30, 2017: Knee
https://www.readbyqxmd.com/read/28666647/objective-quantification-of-trochlear-dysp-lasia-assessment-of-the-difference-in-morphology-between-control-and-chronic-patellofemoral-instability-patients
#6
Andreas Voss, Sangmin Ryan Shin, Akira M Murakami, Mark P Cote, Andrea Achtnich, Elmar Herbst, Anthony A Schepsis, Cory Edgar
BACKGROUND: Trochlear dysplasia is an important risk factor associated with patellofemoral instability, but it remains difficult to classify with consistency. Currently there is no objective way to quantify the dysplasia. The purpose of this study is to define and quantify objectively the trochlear morphology by volume and length via computed tomography (CT). METHODS: One-hundred control patients (136 knees) were retrospectively reviewed and compared to 36 consecutive patients (72 knees) who were treated surgically for recurrent patellar instability and known trochlear dysplasia based on a lateral radiograph...
June 27, 2017: Knee
https://www.readbyqxmd.com/read/28666646/body-mass-index-as-a-predictor-of-outcome-in-total-knee-replace-a-systemic-review-and-meta-analysis
#7
Kai Sun, Hui Li
BACKGROUND: To conduct a meta-analysis with randomized controlled trials (RCTs) published in full text to demonstrate database to show the associations of perioperative, postoperative outcomes of normal and high body mass index (BMI) to provide the predictive diagnosis for clinic. METHODS: Literature search was performed in PubMed, Embase, Web of Science and Cochrane Library for information from the earliest date of data collection to February. RCTs comparing the benefits and risks of normal BMI with those of high BMI in primary total knee arthroplasty (TKA) were included...
June 27, 2017: Knee
https://www.readbyqxmd.com/read/28622843/fatal-pulmonary-embolism-following-elective-total-knee-replacement-using-aspirin-in-multi-modal-prophylaxis-a-12year-study
#8
C Quah, E Bayley, N Bhamber, P Howard
BACKGROUND: The National Institute for Health and Clinical Excellence (NICE) has issued guidelines on which thromboprophylaxis regimens are suitable following lower limb arthroplasty. Aspirin is not a recommended agent despite being accepted in orthopaedic guidelines elsewhere. We assessed the incidence of fatal pulmonary embolism (PE) and all-cause mortality following elective primary total knee replacement (TKR) with a standardised multi-modal prophylaxis regime in a large teaching district general hospital...
June 13, 2017: Knee
https://www.readbyqxmd.com/read/28622842/two-stage-knee-arthrodesis-with-a-modular-intramedullary-nail-due-to-septic-failure-of-revision-total-knee-arthroplasty-with-extensor-mechanism-deficiency
#9
Max J Friedrich, Jan Schmolders, Matthias D Wimmer, Andreas C Strauss, Milena M Ploeger, Dieter C Wirtz, Sascha Gravius, Thomas M Randau
BACKGROUND: Periprosthetic joint infection is a serious complication and reconstruction after failed revision total knee arthroplasty with significant bone loss and compromised soft-tissues can be challenging. Objective of this study was to assess clinical and functional results, implant survival and infection recurrence rates in patients treated with two-stage arthrodesis after failed revision TKA with extensor mechanism deficiencies due to PJI, and to identify the factors that affect outcomes after surgery...
June 13, 2017: Knee
https://www.readbyqxmd.com/read/28615121/implications-of-the-getting-it-right-first-time-initiative-for-regional-knee-arthroplasty-services
#10
Richard Barksfield, James Murray, James Robinson, Andrew Porteous
STUDY AIM: The aim of this case study of regional orthopaedic practice was to estimate the potential impact of the GIRFT recommendations (iGIRFT) of minimum unit and surgeon specific volumes to orthopaedic units within the Severn Region, UK. METHOD: Practice profiles for surgeons and units were generated using the UK National Joint Registry Surgeon and Hospital Profile Database. Minimum volume thresholds were set at 13 procedures/year for surgeons and 30 procedures/year for units...
June 11, 2017: Knee
https://www.readbyqxmd.com/read/28601393/oxidized-zirconium-versus-cobalt-chromium-against-the-native-patella-in-total-knee-arthroplasty-patellofemoral-outcomes
#11
Fabrizio Matassi, Tommaso Paoli, Roberto Civinini, Christian Carulli, Massimo Innocenti
BACKGROUND: Oxidized zirconium (OxZr) has demonstrated excellent mechanical properties in vitro when used against articular cartilage; less coefficient of friction and less chondral damage have been found when compared with cobalt-chromium (CoCr) implants. However, controversy exists as to whether implants with a zirconium femoral component articulate safely with a native patella in total knee arthroplasty (TKA). To answer this question, the clinical and radiographic results were analysed from a group of patients who underwent a TKA with patella retention; the OxZr versus CoCr femoral components were compared...
June 7, 2017: Knee
https://www.readbyqxmd.com/read/28583727/validating-the-forgotten-joint-score-12-in-patients-after-acl-reconstruction
#12
Henrik Behrend, Karlmeinrad Giesinger, Vilijam Zdravkovic, Johannes M Giesinger
BACKGROUND: The forgotten joint score-12 (FJS-12), used to measure postoperative joint awareness, has been extensively validated to assess outcomes after arthroplasty, however the new score has never been validated in evaluating anterior cruciate ligament (ACL) reconstruction. The purpose of our study was to validate the FJS-12 versus the knee injury and osteoarthritis outcome score (KOOS) for patients who have undergone ACL reconstruction. METHODS: All patients who had undergone ACL reconstruction with the same arthroscopic surgical technique at our institution between 2011 and 2014 (medium-term follow-up group (M-FU)) or between 2000 and 2005 (long-term follow-up group (L-FU)) were considered for inclusion in the study...
June 2, 2017: Knee
https://www.readbyqxmd.com/read/28579132/optimization-of-sagittal-and-coronal-planes-with-robotic-assisted-unicompartmental-knee-arthroplasty
#13
Michael A Gaudiani, Benedict U Nwachukwu, Jayesh V Baviskar, Mrinal Sharma, Anil S Ranawat
BACKGROUND: One of the anatomic goals of total knee arthroplasty (TKA) is optimizing in the coronal and sagittal plane. Accurate alignments of both planes have been correlated to functional outcome and range of motion. There is a paucity of evidence on the accuracy of unicompartmental knee arthroplasty (UKA) in balancing biplanar knee alignment - specifically sagittal plane alignment. Because robotic assisted UKA has an advantage of more accurately manipulating sagittal plane for optimal alignment and kinematics based on pre-operative and intraoperative CT planning we assessed the accuracy...
June 1, 2017: Knee
https://www.readbyqxmd.com/read/28576689/coronal-alignment-predicts-the-use-of-semi-constrained-implants-in-contemporary-total-knee-arthroplasty
#14
J Ryan Martin, Keith A Fehring, Chad D Watts, Daniel L Levy, Bryan D Springer, Raymond H Kim
BACKGROUND: Semi-constrained, or varus-valgus constrained, implants are occasionally necessary to achieve stability in primary total knee arthroplasty (TKA). However, outcomes with these implants are largely unknown. Therefore, the primary goals of this study were to determine 1) can we identify preoperatively which patients might require a semi-constrained implant and 2) are there any clinical and or radiographic differences for those that require a semi-constrained implant? METHODS: A multicenter retrospective study was performed to retrospectively review patients that had a Stryker Triathlon (Kalamazoo, MI) TKA with a Total Stabilized (TS) tibial insert (n=75)...
May 30, 2017: Knee
https://www.readbyqxmd.com/read/28571921/variability-in-static-alignment-and-kinematics-for-kinematically-aligned-tka
#15
Willy Theodore, Joshua Twiggs, Elizabeth Kolos, Justin Roe, Brett Fritsch, David Dickison, David Liu, Lucy Salmon, Brad Miles, Stephen Howell
BACKGROUND: Total knee arthroplasty (TKA) significantly improves pain and restores a considerable degree of function. However, improvements are needed to increase patient satisfaction and restore kinematics to allow more physically demanding activities that active patients consider important. The aim of our study was to compare the alignment and motion of kinematically and mechanically aligned TKAs. METHODS: A patient specific musculoskeletal computer simulation was used to compare the tibio-femoral and patello-femoral kinematics between mechanically aligned and kinematically aligned TKA in 20 patients...
May 29, 2017: Knee
https://www.readbyqxmd.com/read/28571920/mobile-bearing-medial-unicompartmental-knee-arthroplasty-in-patients-whose-lifestyles-involve-high-degrees-of-knee-flexion-a-10-14year-follow-up-study
#16
Won Sik Choy, Kwang Won Lee, Ha Yong Kim, Kap Jung Kim, Young Sub Chun, Dae Suk Yang
BACKGROUND: Because Asian populations have different lifestyles, such as squatting and sitting on the floor, from those of Western populations, it is possible that the clinical results and survival rate of unicompartmental knee arthroplasty (UKA) for Asian patients may be different. This study described outcomes of mobile bearing medial UKA for Korean patients. METHODS: A total of the 164 knees treated with mobile bearing UKAs in 147 patients (14 males and 133 females) were reviewed...
May 29, 2017: Knee
https://www.readbyqxmd.com/read/28559006/acl-graft-metabolic-activity-assessed-by-18-fdg-pet-mri
#17
Robert A Magnussen, Katherine Binzel, Jun Zhang, Wenbo Wei, Melanie U Knopp, David C Flanigan, Timothy E Hewett, Christopher C Kaeding, Michael V Knopp
BACKGROUND: To demonstrate the use of (18)Fluorodeoxyglucose positron emission tomography (PET) and magnetic resonance imaging (MRI) in combination ((18)FDG-PET) to assess the metabolic activity of ACL graft tissue and evaluate the utility of this technique for ligament imaging. METHODS: Twenty-one knees with intact ACL grafts in 19 patients at multiple time points following ACL reconstruction were recruited to participate. PET-MRI imaging was performed using a custom device to place knees in the same position for both studies...
May 27, 2017: Knee
https://www.readbyqxmd.com/read/28559005/tibial-insertions-of-the-anterior-cruciate-ligament-and-the-anterior-horn-of-the-lateral-meniscus-a-histological-and-computed-tomographic-study
#18
Masashi Kusano, Yasukazu Yonetani, Tatsuo Mae, Ken Nakata, Hideki Yoshikawa, Konsei Shino
BACKGROUND: A positional relationship between the anterior cruciate ligament (ACL) and the anterior horn of the lateral meniscus (AHLM) has not previously been a topic of interest in the literature because the AHLM is already known to be obviously adjacent to the ACL and is assumed as a lateral border. The objective of this study was to investigate the positional anatomic relationship between the ACL and AHLM by histological evaluation of sequential slices and computed tomography (CT) of the tibial insertion sites...
May 27, 2017: Knee
https://www.readbyqxmd.com/read/28554796/detection-of-bone-defects-around-zirconium-component-after-total-knee-arthroplasty
#19
Yukihide Minoda, Kazumasa Yamamura, Kazutaka Sugimoto, Shigekazu Mizokawa, Shingo Baba, Hiroaki Nakamura
BACKGROUND: It is difficult to detect bone defects caused by loosening or osteolysis around the femoral component after total knee arthroplasty (TKA) because the thick metal hinders visualization of bone defects. Previous reports have shown that tomosynthesis, a novel tomographic technique, is advantageous over fluoroscopically guided plain radiography, computed tomography (CT) and magnetic resonance imaging (MRI) for the early detection of bone defects around a conventional cobalt-chromium alloy component...
May 26, 2017: Knee
https://www.readbyqxmd.com/read/28552192/long-term-outcome-of-knee-arthroplasty-in-the-setting-of-pigmented-villonodular-synovitis
#20
Matthew T Houdek, Maurizio Scorianz, Cody C Wyles, Robert T Trousdale, Franklin H Sim, Michael J Taunton
BACKGROUND: Pigmented villonodular synovitis (PVNS) is a rare, benign proliferation of the synovium, commonly affecting the knee. Arthroplasty can successfully manage arthrosis in this population; however, outcome data is limited. The purpose of this study was to investigate the oncologic and functional outcome of patients undergoing total knee arthroplasty (TKA) in the setting of PVNS. METHODS: 48 patients were identified at our institution with histologically confirmed PVNS that subsequently received TKA...
May 25, 2017: Knee
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