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https://www.readbyqxmd.com/read/28211291/a-biomechanical-analysis-of-tibial-acl-reconstruction-with-graft-length-mismatch
#1
Evan B Gaines, Diana Lau, Qais Naziri, Westley Hayes, Julio J Jauregui, Bhaveen H Kapadia, William P Urban, Bashir A Zikria
INTRODUCTION: The incidence of graft length mismatch (GLM) during anterior cruciate ligament (ACL) reconstruction is reported to be up to 13%, with a rate of 20% when using bone-patellar tendon-bone (BPTB) allografts. Multiple techniques have been described to accommodate for the longer BPTB graft. As no study has compared the biomechanical properties of these methods (with cyclic loading), we evaluated the strength of four different surgical techniques used to accommodate for GLM during ACL reconstruction...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28210646/pain-assessment-after-anterior-cruciate-ligament-reconstruction-bone-patellar-tendon-bone-versus-hamstring-tendon-autograft
#2
Kelechi R Okoroha, Robert A Keller, Edward K Jung, Lafi Khalil, Nathan Marshall, Patricia A Kolowich, Vasilios Moutzouros
BACKGROUND: Anterior cruciate ligament (ACL) reconstruction is a common outpatient procedure that is accompanied by significant postoperative pain. PURPOSE: To determine differences in acute pain levels between patients undergoing ACL reconstruction with bone-patellar tendon-bone (BTB) versus hamstring tendon (HS) autograft. STUDY DESIGN: Cohort study; Level of evidence, 2. METHODS: A total of 70 patients who underwent primary ACL reconstruction using either BTB or HS autografts consented to participate...
December 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28207972/anatomical-study-of-the-inferior-patellar-pole-and-patellar-tendon
#3
M Edama, I Kageyama, M Nakamura, T Kikumoto, E Nakamura, W Ito, T Takabayashi, T Inai, H Onishi
In this study, detailed investigations of the shape of the inferior patellar pole, the site of the patellar tendon attachment, and the length and course of the patellar tendon were performed with the aim of examining the anatomical factors involved in the developmental mechanism of patellar tendinitis.  The investigation examined 100 legs from 50 cadavers. The inferior patellar pole was classified into three types: Pointed, Intermediate, and Blunt. The attachment of the patellar tendon to the inferior patellar pole was classified into two types: an anterior and a posterior...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28205264/the-influence-of-patellar-tendon-and-muscle-tendon-unit-stiffness-on-quadriceps-explosive-strength-in-man
#4
Garry J Massey, Thomas G Balshaw, Thomas M Maden-Wilkinson, Neale A Tillin, Jonathan P Folland
The influence of musculotendinous tissue stiffness on contractile rate of torque development (RTD) remains opaque. This study examined the relationships between both patellar tendon (PT) and vastus lateralis (VL) muscle-tendon unit (MTU) stiffness, and voluntary and evoked knee extension RTD. Fifty-two healthy untrained males completed duplicate laboratory sessions. Absolute and relative RTD was measured at 50 Nm/25%MVT increments from onset and sequentially during explosive voluntary and evoked octet (supramaximal stimulation: [8 pulses at 300 Hz]) isometric contractions...
February 15, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28205075/hamstring-autograft-versus-patellar-tendon-autograft-for-acl-reconstruction-is-there-a-difference-in-graft-failure-rate-a-meta-analysis-of-47-613-patients
#5
Brian T Samuelsen, Kate E Webster, Nick R Johnson, Timothy E Hewett, Aaron J Krych
BACKGROUND: Bone-patellar tendon-bone (bone-tendon-bone) and four-strand hamstring tendon grafts (hamstring) are the most commonly utilized autografts for primary anterior cruciate ligament (ACL) reconstruction. Existing clinical trials, registry studies, and meta-analyses offer conflicting opinions regarding the most favorable graft choice. QUESTIONS/PURPOSES: Which graft type for ACL reconstruction (bone-tendon-bone or hamstring) has a higher risk of (1) graft rupture and/or (2) graft laxity? METHODS: We performed a meta-analysis of randomized controlled trials (RCTs), prospective cohort studies, and high-quality national registry studies to compare the outcomes of primary ACL reconstruction with bone-tendon-bone autograft or hamstring autograft...
February 15, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28194391/simultaneous-bilateral-patellar-tendon-rupture
#6
Diogo Lino Moura, José Pedro Marques, Francisco Manuel Lucas, Fernando Pereira Fonseca
Bilateral patellar tendon rupture is a rare entity, often associated with systemic diseases and patellar tendinopathy. The authors report a rare case of a 34-year-old man with simultaneous bilateral rupture of the patellar tendon caused by minor trauma. The patient is a retired basketball player with no past complaints of chronic knee pain and a history of steroid use. Surgical management consisted in primary end-to-end tendon repair protected temporarily with cerclage wiring, followed by a short immobilization period and intensive rehabilitation program...
January 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28178094/reconstruction-of-symptomatic-congenital-anterior-cruciate-ligament-insufficiency
#7
Brant C Sachleben, Adam Y Nasreddine, Jeffrey J Nepple, Frances A Tepolt, James R Kasser, Mininder S Kocher
BACKGROUND: Hypoplasia or congenital absence of the anterior cruciate ligament (ACL) is a rare disorder occurring in ∼1 in every 6000 births. Although some patients with hypoplasia or agenesis of the ACL may not complain of instability, others desire to participate in more demanding activities that require the stability of a competent ACL. There are limited reports of surgical treatment of this patient population. The purpose of this study was to report ACL reconstruction in a case series of patients with symptomatic congenital ACL deficiency...
February 7, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28160657/patellar-tendon-straps-decrease-pre-landing-quadriceps-activation-in-males-with-patellar-tendinopathy
#8
Adam B Rosen, Jupil Ko, Kathy J Simpson, Cathleen N Brown
OBJECTIVE: To determine if patellar tendon straps altered quadriceps' muscle activity during a drop-jump landing in males with and without patellar tendinopathy. DESIGN: Case-control. SETTINGS: Biomechanics Research Laboratory. PARTICIPANTS: Twenty recreationally-active males participated: ten (age = 21.3 ± 2.4 years, height = 182.8 ± 5.3 cm, mass = 81.7 ± 8.6 kg) with patellar tendinopathy; ten (age = 22...
September 13, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28151759/patellar-tendinopathy-and-potential-risk-factors-an-international-database-of-cases-and-controls
#9
Sarah Morton, Sean Williams, Xavier Valle, David Diaz-Cueli, Peter Malliaras, Dylan Morrissey
OBJECTIVES: Numerous risk factors have been identified for patellar tendinopathy (PT), often in small population studies. The aim was to use an international online questionnaire to generate a large database and identify significant risk factors. DESIGN: Case-control study. SETTING: Private practice and sporting teams recruited from England, Spain, and Italy with the questionnaire available in all 3 languages (equivalence between online and self-administration shown previously)...
February 1, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28151693/anterolateral-ligament-reconstruction-is-associated-with-significantly-reduced-acl-graft-rupture-rates-at-a-minimum-follow-up-of-2-years
#10
Bertrand Sonnery-Cottet, Adnan Saithna, Maxime Cavalier, Charles Kajetanek, Eduardo Frois Temponi, Matt Daggett, Camilo Partezani Helito, Mathieu Thaunat
BACKGROUND: Graft failure and low rates of return to sport are major concerns after anterior cruciate ligament (ACL) reconstruction, particularly in a population at risk. PURPOSE: To evaluate the association between reconstruction techniques and subsequent graft rupture and return-to-sport rates in patients aged 16 to 30 years participating in pivoting sports. STUDY DESIGN: Cohort study; Level of evidence, 2. METHODS: A prospective study of patients undergoing primary ACL reconstruction with a bone-patellar tendon-bone (B-PT-B) graft, quadrupled hamstring tendon (4HT) graft, or hamstring tendon graft combined with anterolateral ligament reconstruction (HT+ALL) was conducted by the Scientific ACL NeTwork International (SANTI) Study Group...
February 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28149740/surgical-technique-jumper-s-knee-arthroscopic-treatment-of-chronic-tendinosis-of-the-patellar-tendon
#11
Matthias Brockmeyer, Alexander Haupert, Dieter Kohn, Olaf Lorbach
Chronic patellar tendinosis (jumper's knee) is a common problem among athletes. Conservative treatment is successful in most of the cases including, among others, the use of nonsteroidal anti-inflammatory drugs, local cryotherapy, eccentric muscle training, limitation of sports activity, and local infiltration. In approximately 10% of conservatively treated patients, conservative treatment fails and surgery is required. Different open and arthroscopic surgical techniques have been described in the literature...
December 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28149738/frontal-tendon-lengthening-plasty-for-treatment-of-structural-patella-baja
#12
Valentino F Bruhin, Stefan Preiss, Gian M Salzmann, Laurent P Harder
Patella baja is a severe complication seen after trauma, prolonged immobilization and surgery. Several surgical methods have been described to proximalize the patella without a change in the patella tendon length. Yet, patella tendon shortening and thickening can be regarded as the hallmark pathology. As such, we describe a technique for the lengthening of the patellar tendon to pathoconformly address underlying patella baja. The technique is reproducible and gives the possibility of an early postoperative mobilization to prevent re-baja-a typical complication after patella baja surgery...
December 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28149400/the-effect-of-different-decline-angles-on-the-biomechanics-of-double-limb-squats-and-the-implications-to-clinical-and-training-practice
#13
Jim Richards, James Selfe, Jonathan Sinclair, Karen May, Gavin Thomas
Bilateral decline squatting has been well documented as a rehabilitation exercise, however, little information exists on the optimum angle of decline. The aim of this study was to determine the ankle and knee angle, moments, the patellofemoral joint load, patellar tendon load and associated muscle activity while performing a double limb squat at different decline angles and the implications to rehabilitation. Eighteen healthy subjects performed double limb squats at 6 angles of declination: 0, 5, 10, 15, 20 and 25 degrees...
September 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28139189/prevalence-and-clinical-implications-of-nerve-injury-during-bone-patellar-tendon-bone-harvesting-for-anterior-cruciate-ligament-reconstruction
#14
Barak Haviv, Mustafa Yassin, Ehud Rath, Shlomo Bronak
PURPOSE: Tendon harvesting for anterior cruciate ligament (ACL) reconstruction often injure sensory branches of the saphenous nerve (SN). Our purpose was to estimate the prevalence and postoperative course of sensory nerve injuries in bone patellar tendon bone (BPTB) autograft harvesting for ACL reconstruction. METHODS: Between 2012 and 2014, patients who had primary ACL with BPTB autograft were included ( n = 60) and interviewed specifically for sensory loss and its recovery...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28138766/-evidence-based-therapy-for-tendinopathy-of-the-knee-joint-which-forms-of-therapy-are-scientifically-proven
#15
H Horstmann, J D Clausen, C Krettek, T S Weber-Spickschen
Tendinopathy in the region of the knee joint is a common pathological disorder. People active in sports, in particular, have a high probability of suffering from tendinopathy. Despite its high clinical relevance, the level of evidence of therapy options for tendinopathy in the knee region differs greatly. This review gives an overview of current evidence levels for therapy options in tendinopathy of the quadriceps, patellar and pes anserinus insertion tendons as well as of the distal iliotibial tract tendon...
January 30, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28137401/secondary-hyperalgesia-occurs-regardless-of-unilateral-or-bilateral-knee-osteoarthritis-involvement-in-individuals-with-mild-or-moderate-level
#16
Vanessa Martins Pereira Silva Moreira, Saulo Delfino Barboza, Juliana Borges Oliveira, Janser Moura Pereira, Valdeci Carlos Dionisio
BACKGROUND: Secondary hyperalgesia in individuals with less severe levels of knee osteoarthritis remains unclear. The objective of this study was to measure the pressure pain threshold of individuals with mild or moderate knee osteoarthritis and compare with no osteoarthritis. METHODS: Ten healthy controls and 30 individuals with mild or moderate knee osteoarthritis divided into two groups (unilateral and bilateral involvement) were included. Dermatomes in lumbar levels (L1, L2, L3, L4 and L5) and sacral level (S1 and S2), myotomes (vastus medialis, vastus lateralis, rectus femoris, adductor longus, tibialis anterior, peroneus longus, iliacus, quadratus lumborum, and popliteus muscles), and sclerotomes in lumbar levels (L1-L2, L2-L3, L3-L4, L4-L5 supraspinous ligaments), over the L5-S1 and S1-S2 sacral areas, pes anserinus bursae, and at the patellar tendon pressure pain threshold were assessed and compared between individuals with and without knee osteoarthritis...
January 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/28135129/autonomic-responses-to-ultrasound-guided-percutaneous-needle-electrolysis-effect-of-needle-puncture-or-electrical-current
#17
Paula García Bermejo, Blanca De la Cruz Torres, José Naranjo Orellana, Manuel Albornoz Cabello
OBJECTIVE: The aim of this study was to establish if the changes in sympathetic and parasympathetic activity (analyzed through heart-rate variability [HRV]) during ultrasound (US)-guided percutaneous needle electrolysis (PNE) is due to the effect of needle puncture only or of the PNE technique per se where the puncture and galvanic current are combined. METHODS: This was an experimental, case-control study that took place at the University of Seville. Subjects were 36 male footballers who were randomly allocated to three groups: a control group (CG; 12 players), for whom HRV was recorded for 10 min, both at rest and during an exhaustive US examination of the patellar tendon and adjacent structures; a first experimental group (PNE group; 12 players), for whom HRV was recorded for 10 min, both at rest and during application of US-guided PNE in the patellar tendon; and a second experimental group (needle group; 12 players), for whom HRV was recorded for 10 min, both at rest and during application of US-guided PNE without electrical current in the patellar tendon...
January 30, 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/28132101/sonographic-characterization-of-hoffa-s-fat-pad-a-pilot-study
#18
Erika Vera-Pérez, Guadalupe Sánchez-Bringas, Lucio Ventura-Ríos, Cristina Hernández-Díaz, Socorro Cortés, Marwin Gutiérrez, Carlos Pineda
This study addresses a topic that was previously unaddressed in the literature: the normal sonographic appearance of the Hoffa's fat pad (HFP) in young, asymptomatic subjects. The aim of the study is to describe the sonoanatomical features of HFP, including its echostructure, echogenicity, elasticity, and vascularization, in subjects without knee pathology. Knees of healthy subjects were examined with grayscale ultrasound (US) to determine the sonographic characteristics of the HFP. Echogenicity was assessed by pixel intensity quantification...
January 28, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28130075/synovial-chondroma-in-hoffa-s-fat-pad-case-report-and-literature-review-of-a-rare-disorder
#19
Lauren O'Connell, Adeel R Memon, Paul Foran, Eamon Leen, Patrick J Kenny
INTRODUCTION: Synovial chrondomatosis is a rare disorder characterised by the development of hyaline cartilage from the synovial membrane. Large isolated lesions in the Hoffa's fat pad are an uncommon entity. PRESENTATION OF CASE: A 33 year old gentleman presented complaining of progressive knee pain associated with an enlarging lesion on the anterior aspect of the right knee, with associated locking and giving way. Examination revealed a firm 4×5cm lesion adjacent to the patellar tendon...
January 5, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28118233/a-novel-functional-correction-method-for-habitual-patellar-dislocation-using-autologous-hamstring-tendon-a-case-report
#20
Yasunari Ikuta, Nobuo Adachi, Masataka Deie, Masakazu Ishikawa, Atsuo Nakamae, Mitsuo Ochi
Habitual patellar dislocation is an uncommon condition. In this case, a patient demonstrated lateral patellar dislocation in the middle or terminal range of flexion. A functional correction of the patella was devised so that the fixation site of the autologous graft on the femur was able to stabilize the patella selectively during the middle or terminal range of flexion. It is not the anatomical medial patellofemoral ligament attachment of the femur that is essential, but that a relevant fixation point on the femur should be sought in each patient to obtain stabilization of the patella to reverse habitual patellar dislocation...
January 21, 2017: Journal of Pediatric Orthopedics. Part B
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