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https://www.readbyqxmd.com/read/29330345/a-computational-simulation-study-to-determine-the-biomechanical-influence-of-posterior-condylar-offset-and-tibial-slope-in-cruciate-retaining-total-knee-arthroplasty
#1
K-T Kang, Y-G Koh, J Son, O-R Kwon, J-S Lee, S K Kwon
OBJECTIVES: Posterior condylar offset (PCO) and posterior tibial slope (PTS) are critical factors in total knee arthroplasty (TKA). A computational simulation was performed to evaluate the biomechanical effect of PCO and PTS on cruciate retaining TKA. METHODS: We generated a subject-specific computational model followed by the development of ± 1 mm, ± 2 mm and ± 3 mm PCO models in the posterior direction, and -3°, 0°, 3° and 6° PTS models with each of the PCO models...
January 2018: Bone & Joint Research
https://www.readbyqxmd.com/read/29312850/anterolateral-rotatory-instability-in-vivo-correlates-tunnel-position-after-anterior-cruciate-ligament-reconstruction-using-bone-patellar-tendon-bone-graft
#2
Yasutaka Tashiro, Ken Okazaki, Koji Murakami, Hirokazu Matsubara, Kanji Osaki, Yukihide Iwamoto, Yasuharu Nakashima
AIM: To quantitatively assess rotatory and anterior-posterior instability in vivo after anterior cruciate ligament (ACL) reconstruction using bone-patellar tendon-bone (BTB) autografts, and to clarify the influence of tunnel positions on the knee stability. METHODS: Single-bundle ACL reconstruction with BTB autograft was performed on 50 patients with a mean age of 28 years using the trans-tibial (TT) (n = 20) and trans-portal (TP) (n = 30) techniques. Femoral and tibial tunnel positions were identified from the high-resolution 3D-CT bone models two weeks after surgery...
December 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/29303366/current-clinical-radiological-and-treatment-perspectives-of-patellofemoral-pain-syndrome
#3
Aishwarya Gulati, Christopher McElrath, Vibhor Wadhwa, Jay P Shah, Avneesh Chhabra
Anterior knee pain in active young adults is commonly related to patellofemoral (PF) pain syndrome (PFPS), which can be broadly classified into patellar malalignment and patellar maltracking. PFPS can be caused by a host of miserable malalignments, such as excessive femoral antetorsion, tibial varus / external rotation, knee valgus and pes planus. Radiographic, CT and MRI evaluations are commonly obtained to further elucidate the malalignment and maltracking abnormalities and exclude other related differentials, such as lateral meniscus tear, extensor tendon tear, anterior tenosynovial giant cell tumor and plica syndrome...
January 5, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29284176/bone-patellar-tendon-bone-autograft-versus-hamstring-tendon-autograft-for-anatomical-anterior-cruciate-ligament-reconstruction-with-three-dimensional-validation-of-femoral-and-tibial-tunnel-positions
#4
Shuji Taketomi, Hiroshi Inui, Ryota Yamagami, Nobuyuki Shirakawa, Kohei Kawaguchi, Takumi Nakagawa, Sakae Tanaka
The purpose of this retrospective study was to first compare the clinical outcome of anatomical double-bundle (DB) anterior cruciate ligament reconstruction (ACLR) with hamstring tendon (HT) autografts and anatomical rectangular tunnel ACLR with bone-patellar tendon-bone (BPTB) autografts. Secondly, we aimed to demonstrate the quantitative locations of the femoral and tibial tunnel apertures using postoperative three-dimensional computed tomography (3D CT).Twenty-five patients underwent anatomical rectangular tunnel ACLR using BPTB grafts (Group B) and 23 patients underwent anatomical DB ACLR using HT grafts (Group H)...
December 28, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29244525/20-year-outcomes-of-anterior-cruciate-ligament-reconstruction-with-hamstring-tendon-autograft-the-catastrophic-effect-of-age-and-posterior-tibial-slope
#5
Lucy J Salmon, Emma Heath, Hawar Akrawi, Justin P Roe, James Linklater, Leo A Pinczewski
BACKGROUND: No well-controlled studies have compared the long-term outcome of anterior cruciate ligament (ACL) reconstruction with hamstring tendon autograft between adolescents and adults. Increased posterior tibial slopes (PTSs) have been reported in the ACL-injured versus controls, but the effect of PTS on the outcome after reconstruction is relatively unexplored. PURPOSE: To compare the prospective longitudinal outcome of "isolated" ACL ruptures treated with anatomic endoscopic ACL reconstruction using hamstring tendon autograft over 20 years in adolescent and adult cohorts and to examine factors for repeat ACL injury...
December 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29205488/single-stage-functional-reconstruction-of-both-peroneal-tendons-and-overlying-skin-with-an-anterolateral-thigh-flap-and-vascularized-fascia-lata-a-case-report
#6
Efstathios G Lykoudis, Ioannis Dalianoudis, Konstantinos Seretis, George E Lykoudis, Marios G Lykissas
Reconstruction of complex soft tissue defects in the distal lower leg remains challenging, since anatomical constraints limit the local options available in this area. In this report, we present a case of single stage functional reconstruction of both peroneal tendons and overlying skin with an anterolateral thigh flap and vascularized fascia lata. A 55-year-old patient underwent wide excision of a synovial sarcoma in the distal lower leg, which resulted in a complex defect including the peroneus longus and brevis tendons (10 cm), and the overlying skin (14 × 8 cm)...
December 3, 2017: Microsurgery
https://www.readbyqxmd.com/read/29202765/a-novel-technique-for-modified-all-inside-repair-of-bucket-handle-meniscus-tears-using-standard-arthroscopic-portals
#7
Jing Hui Yik, Bryan Thean Howe Koh, Wilson Wang
BACKGROUND: Bucket-handle meniscus tears (BHMT) are often displaced and unstable. The inside-out technique of repairing such tears is currently the gold standard. All-inside repair with meniscal fixators is getting increasingly popular. Shortcomings of the inside-out technique include neurovascular complications, especially saphenous nerve palsy, and retention of a non-resorbable suture which can result in discomfort to patient, granuloma formation, and a foci of infection. Hence, the purpose of this project was to innovate a novel all-inside technique to precisely reduce and fix BHMT while avoiding neurovascular complications and retention of a non-resorbable suture...
December 4, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29191469/role-of-anterolateral-reconstruction-in-patients-undergoing-anterior-cruciate-ligament-reconstruction
#8
REVIEW
C Lutz
There is renewed interest in anterolateral reconstruction (ALR) for patients undergoing anterior cruciate ligament (ACL) reconstruction. This is the result of isolated ACL reconstruction and double-bundle reconstruction providing inadequate control over the pivot shift, and recent anatomical and biomechanical studies on the anterolateral ligament (ALL) and its role in the knee's rotational stability.From a technical point of view, ALR can be performed either as a continuity of the intra-articular ACL reconstruction or an independent procedure...
November 27, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29172391/measurement-of-knee-rotation-angles-using-a-smartphone-application-an-experimental-study-of-porcine-knees
#9
Hee-June Kim, Hyun-Joo Lee, Ji-Yeon Shin, Young-Seo Choi, Hee-Soo Kyung
Purpose: This study evaluated the efficacy of a smartphone application in the measurement of rotation angles in porcine knees. Materials and Methods: Two K-wires were fixated to the femoral condyle and anterior tibial crest of 10 porcine legs. The angle created between the K-wires with an external rotation force applied was measured on a photograph and defined as the true angle. The same force was applied to the legs placed on a splint with a smartphone attached to the plantar side...
December 1, 2017: Knee Surgery & related Research
https://www.readbyqxmd.com/read/29171322/graft-fixation-influences-revision-risk-after-acl-reconstruction-with-hamstring-tendon-autografts
#10
Andreas Persson, Tone Gifstad, Martin Lind, Lars Engebretsen, Knut Fjeldsgaard, Jon Olav Drogset, Magnus Forssblad, Birgitte Espehaug, Asle B Kjellsen, Jonas M Fevang
Background and purpose - A large number of fixation methods of hamstring tendon autograft (HT) are available for anterior cruciate ligament reconstruction (ACLR). Some studies report an association between fixation method and the risk of revision ACLR. We compared the risk of revision of various femoral and tibial fixation methods used for HT in Scandinavia 2004-2011. Materials and methods - A register-based study of 38,666 patients undergoing primary ACLRs with HT, with 1,042 revision ACLRs. The overall median follow-up time was 2...
November 24, 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/29159673/double-bundle-anterior-cruciate-ligament-reconstruction-is-better-than-single-bundle-reconstruction-in-terms-of-objective-assessment-but-not-in-terms-of-subjective-score
#11
Faisal Ahmed Hashem El-Sherief, Wael Abdelkarim Aldahshan, Yaser Elsayed Wahd, Ashraf Mohamed Abdelaziz, Hany Abdel Gawwad Soliman, Tohamy Goda Hassan, Hassan Fathy Elbehairy, Adel Hamed Awadallah
PURPOSE: A comparison of clinical outcomes between double-bundle (DB) and single-bundle (SB) anterior cruciate ligament (ACL) reconstruction for patients with ACL injury. METHODS: Sixty patients were treated with either SB (n = 30) or DB (n = 30) ACL reconstruction between 2011 and 2012. The hamstring tendons were autografted with suspensory fixation on the femoral side, while a bio-absorbable interference screw was used for fixation on the tibial side. These patients were evaluated using Lysholm score, International Knee Documentation Committee (IKDC) forms (both objective and subjective), Lachman test, pivot shift test, and KT 1000 arthrometer...
November 20, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29145970/minimally-invasive-posteromedial-percutaneous-plate-osteosynthesis-for-diaphyseal-tibial-fractures-technique-description
#12
Andre Wajnsztejn, Robinson Esteves Santos Pires, Alexandre Leme Godoy Dos Santos, Pedro Jose Labronici, Helio Jorge Alvachian Fernandes, Mario Ferretti
PURPOSE: The aim of this study was to evaluate the feasibility of performing minimally-invasive plate osteosynthesis (MIPO) in tibial fractures using two posteromedial incisions, and to measure the distance between the plate and neurovascular structures. MATERIALS AND METHODS: We performed nine dissections of specimens that were submitted to tibial MIPO with two posteromedial incisions. One locking compression plate (LCP) of 14 to 16 holes was inserted into the submuscular tunnel in a retrograde manner...
October 2017: Injury
https://www.readbyqxmd.com/read/29137565/mri-evaluation-of-the-acl-remnant-tissue-in-acl-deficient-knee
#13
Tsuneari Takahashi, Masashi Kimura, Katsushi Takeshita
PURPOSE: To clarify the relationship between anterior cruciate ligament (ACL) remnant tissue at the time of surgery and preoperative evaluation of ACL-injured knee. METHODS: A total of 123 patients were enrolled and classified into four groups based on the classification of ACL remnant tissue. To quantify the signal-noise quotient (SNQ), five regions of interest (ROIs), such as tibial, mid, femoral ACL remnant, tendon of quadriceps femoris to normalize the signal intensity of ACL remnant tissue, and background measurements, were measured...
September 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/29132386/primary-single-suture-anchor-re-fixation-of-anterior-cruciate-ligament-proximal-avulsion-tears-leads-to-good-functional-mid-term-results-a-preliminary-study-in-12-patients
#14
Christof Hoffmann, Jan Friederichs, Christian von Rüden, Christian Schaller, Volker Bühren, Christoph Moessmer
BACKGROUND: Current studies demonstrate encouraging short-term results after primary anterior cruciate ligament (ACL) suture anchor repair. However, earlier studies reported deterioration of knee function at 5-year follow-up following good clinical short-term recovery. Therefore, the aim of this study was to evaluate clinical long-term results after primary ACL repair at a minimum 5-year follow-up. METHODS: In a retrospective study, 13 patients were included between 2009 and 2012...
November 13, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29078822/presentation-diagnosis-and-nonsurgical-treatment-options-of-the-anterior-tibial-tendon-posterior-tibial-tendon-peroneals-and-achilles
#15
REVIEW
David Pedowitz, David Beck
Disorders of the anterior tibial tendon (ATT) are rare, and relatively few series have been described in the literature. Ruptures of the ATT are more common than tendinopathies of the ATT. For those patients with a tendinopathy, initial treatment may include activity and shoe-wear modifications.
December 2017: Foot and Ankle Clinics
https://www.readbyqxmd.com/read/29075841/effects-of-tibial-baseplate-shape-on-rotational-alignment-in-total-knee-arthroplasty-three-dimensional-surgical-simulation-using-osteoarthritis-knees
#16
Yuan Ma, Hideki Mizu-Uchi, Ken Okazaki, Tetsuro Ushio, Koji Murakami, Satoshi Hamai, Yukio Akasaki, Yasuharu Nakashima
INTRODUCTION: Placement of tibial component is expected to fulfill both maximum surface coverage and recommended anterior-posterior (AP) alignment in total knee arthroplasty (TKA). The purpose of this study is to evaluate the effect of the tibial baseplate shape on AP axis. MATERIALS AND METHODS: Virtual surgery of TKA was performed with three-dimensional bone models reconstructed from 77 osteoarthritis varus knees. Two differently designed tibial baseplates, symmetrically and anatomically, were set to the cut surface under posterior slopes of 0°, 3°, and 7°...
October 26, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29067474/restoring-tibiofemoral-alignment-during-acl-reconstruction-results-in-better-knee-biomechanics
#17
Frantzeska Zampeli, Ioannis Terzidis, João Espregueira-Mendes, Jim-Dimitris Georgoulis, Manfred Bernard, Evangelos Pappas, Anastasios D Georgoulis
PURPOSE: Anterior cruciate ligament (ACL) reconstruction (ACLR) aims to restore normal knee joint function, stability and biomechanics and in the long term avoid joint degeneration. The purpose of this study is to present the anatomic single bundle (SB) ACLR that emphasizes intraoperative correction of tibiofemoral subluxation that occurs after ACL injury. It was hypothesized that this technique leads to optimal outcomes and better restoration of pathological tibiofemoral joint movement that results from ACL deficiency (ACLD)...
October 24, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29065271/hamstring-graft-incorporation-according-to-the-length-of-the-graft-inside-tunnels
#18
Etienne Cavaignac, Vincent Marot, Marie Faruch, Nicolas Reina, Jérôme Murgier, Franck Accadbled, Emilie Berard, Philippe Chiron
BACKGROUND: Anterior cruciate ligament (ACL) reconstruction with a quadrupled semitendinosus (ST4) graft is an evolution of the standard technique with 2 hamstring tendons (semitendinosus + gracilis [STG]). However, there is no published comparison of how well these 2 types of hamstring grafts are incorporated into the bone tunnels. Because the ST4 graft is shorter, there is less graft material inside the tunnels. PURPOSE: To use magnetic resonance imaging (MRI) to compare graft incorporation in the tibial bone tunnels 1 year after ACL reconstruction with either an STG graft or ST4 graft...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29065270/medial-meniscus-resection-increases-and-medial-meniscus-repair-preserves-anterior-knee-laxity-a-cohort-study-of-4497-patients-with-primary-anterior-cruciate-ligament-reconstruction
#19
Riccardo Cristiani, Erik Rönnblad, Björn Engström, Magnus Forssblad, Anders Stålman
BACKGROUND: There are still controversies regarding the effects on knee laxity of additional meniscus resection or repair in the setting of anterior cruciate ligament reconstruction (ACLR). Hypothesis/Purpose: The purpose was to determine the effects on knee laxity of resection or repair of medial meniscus (MM) or lateral meniscus (LM) injuries in the ACLR knee. The hypothesis was that patients with an additional meniscus resection would have significantly increased postoperative knee laxity versus that of an isolated ACLR, whereas patients with meniscus repair would have laxity comparable to that of an isolated ACLR...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28966383/transportal-anterior-cruciate-ligament-reconstruction-with-quadrupled-hamstring-tendon-graft-a-prospective-outcome-study
#20
Chandan Kumar, Anil Kumar Gupta, Santosh Kumar Singh, Rohit Jain
BACKGROUND: Anterior cruciate ligament (ACL) reconstruction has been one of the most commonly performed procedures throughout the world. Unsatisfactory outcome with conventional ACL reconstruction has been attributed to nonanatomic graft placement. Researchers have advised placing the graft in the native footprint of ACL to avoid nonanatomic graft placement. The goal of this study was to analyze the outcome of anatomic single bundle ACL reconstruction using transportal technique. MATERIALS AND METHODS: This was a prospective outcome study conducted on 85 consecutive patients of ACL reconstruction of which 62 patients met inclusion and exclusion criteria and were analyzed for final results...
September 2017: Indian Journal of Orthopaedics
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