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https://www.readbyqxmd.com/read/28636440/effects-of-time-to-start-training-after-acute-patellar-tendon-enthesis-injuries-on-healing-of-the-injury-in-a-rabbit-model
#1
Lin Wang, Kaiyu Xiong, Bo Wang, Xiaotian Liang, Haiwei Li, Haitao Liu, Hui He
BACKGROUND: A patellar tendon injury is a common injury in sports. The optimal time to start training after an acute, proximal patellar enthesis injury is still unclear. HYPOTHESIS: The time to start training after an acute, proximal patellar enthesis injury significantly affects healing of the patellar tendon 4 weeks after the injury. STUDY DESIGN: Controlled laboratory study. METHODS: The left hindlimbs of 35 mature female rabbits were randomly assigned to 5 injury groups including a 4-week natural healing group (NH4W) and 4 training groups that started low-intensity training at 24 hours (POST24), 48 hours (POST48), 72 hours (POST72), and 96 hours (POST96) after an acute patellar tendon injury, with 7 limbs in each group...
June 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28636429/autograft-versus-allograft-for-posterior-cruciate-ligament-reconstruction-an-updated-systematic-review-and-meta-analysis
#2
John W Belk, Matthew J Kraeutler, Justin M Purcell, Eric C McCarty
BACKGROUND: Multiple studies have demonstrated a higher risk of graft failure after anterior cruciate ligament reconstruction with allograft, but limited data are available comparing outcomes of posterior cruciate ligament reconstruction (PCLR) with autograft versus allograft. PURPOSE: To compare the clinical outcomes of autograft versus allograft for primary PCLR. STUDY DESIGN: Systematic review. METHODS: A systematic review was performed by searching PubMed, the Cochrane Library, and EMBASE to locate studies (level of evidence I-III) comparing clinical outcomes of autograft versus allograft in patients undergoing primary PCLR with the conventional transtibial technique...
June 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28636061/impact-of-femoral-varus-on-complications-and-outcome-associated-with-corrective-surgery-for-medial-patellar-luxation
#3
Karen L Perry, Robert J Adams, Shane J Andrews, Charlie Tewson, Mieghan Bruce
OBJECTIVES: To evaluate the association of femoral varus with postoperative complications and outcome following standard corrective surgery for medial patellar luxation (MPL) without distal femoral osteotomy (DFO) in dogs. METHODS: In a retrospective study spanning a 12 year period, 87 stifles with MPL that were treated by standard surgical techniques were included. Inclination angle (ICA), femoral varus angle (FVA), anatomical lateral distal femoral angle (aLDFA), and mechanical lateral distal femoral angle (mLDFA) were measured...
June 21, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28634096/reconstruction-of-disrupted-extensor-mechanism-after-total-knee-arthroplasty
#4
C T Lim, Derek F Amanatullah, James I Huddleston, Alex H S Harris, Katherine L Hwang, William J Maloney, Stuart B Goodman
BACKGROUND: Disruption of the extensor mechanism after total knee arthroplasty (TKA) is a debilitating complication that results in extension lag, limited range of motion, difficulty in walking, frequent falls, and chronic pain. This study presents the clinical and radiographic results of reconstruction after extensor mechanism disruption in TKA patients. METHODS: Consecutive patients with allograft reconstruction of extensor mechanism after TKA were identified retrospectively from an academic tertiary center for revision TKA...
May 11, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28631112/risk-of-revision-was-not-reduced-by-a-double-bundle-acl-reconstruction-technique-results-from-the-scandinavian-registers
#5
Cathrine Aga, Jüri-Tomas Kartus, Martin Lind, Stein Håkon Låstad Lygre, Lars-Petter Granan, Lars Engebretsen
BACKGROUND: Double-bundle anterior cruciate ligament (ACL) reconstruction has demonstrated improved biomechanical properties and moderately better objective outcomes compared with single-bundle reconstructions. This could make an impact on the rerupture rate and reduce the risk of revisions in patients undergoing double-bundle ACL reconstruction compared with patients reconstructed with a traditional single-bundle technique. The National Knee Ligament Registers in Scandinavia provide information that can be used to evaluate the revision outcome after ACL reconstructions...
June 19, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28630757/the-patellofemoral-joint-from-dysplasia-to-dislocation
#6
Stefano Zaffagnini, Alberto Grassi, Gianluca Zocco, Michele Attilo Rosa, Cecilia Signorelli, Giulio Maria Marcheggiani Muccioli
Patellofemoral dysplasia is a major predisposing factor for instability of the patellofemoral joint. However, there is no consensus as to whether patellofemoral dysplasia is genetic in origin, caused by imbalanced forces producing maltracking and remodelling of the trochlea during infancy and growth, or due to other unknown and unexplored factors.The biomechanical effects of patellofemoral dysplasia on patellar stability and on surgical procedures have not been fully investigated. Also, different anatomical and demographic risk factors have been suggested, in an attempt to identify the recurrent dislocators...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28629943/arthroscopically-assisted-fixation-is-a-reliable-option-for-patellar-fractures-a-literature-review
#7
REVIEW
Simone Cerciello, Mark Cote, Sébastien Lustig, Felix Dyrna, Leo Pauzenberger, Philippe Neyret, Augustus D Mazzocca
BACKGROUND: Proper reduction and stable fixation of articular fractures is essential for an early recovery and to avoid late complications. Arthroscopically assisted techniques for minimally invasive fixation have been introduced to reduce local morbidity and improve anatomic reduction of the fragments. However up to date no clear indications for surgery have been given. In addition, the precise rates of functional outcomes and complications are controversial. The hypothesis was the systematic analysis of the available literature would provide precise indications, outcomes and complications of arthroscopically assisted techniques for patellar fracture fixation...
June 16, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28629941/does-patella-lowering-improve-crouch-gait-in-cerebral-palsy-comparative-retrospective-study
#8
Eric Desailly, Camille Thévenin-Lemoine, Nejib Khouri
BACKGROUND: Patellalowering aims to improve quadriceps function as a means of correcting crouch gait in patients with cerebral palsy (PC). Few studies have assessed the effects of patella lowering as a component of multilevel surgery. HYPOTHESIS: Including patella lowering into the components of multilevel surgery is beneficial in patients with crouch gait and patella alta. MATERIAL ET METHODS: In 12 lower limbs with patella alta (Caton-Deschamps index >1...
June 16, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28628800/increased-internal-femoral-torsion-can-be-regarded-as-a-risk-factor-for-patellar-instability-a-biomechanical-study
#9
Peter Kaiser, Werner Schmoelz, Philip Schoettle, Marit Zwierzina, Christian Heinrichs, Rene Attal
BACKGROUND: Increased internal femoral torsion is regarded as a risk factor for patellar instability. Biomechanical investigations confirming this hypothesis are missing. METHODS: Eight fresh-frozen cadaver knees were tested on a specially designed simulator. Patellar motion and patellofemoral pressure were evaluated for 0°, 10°, and 20° of increased internal and external femoral torsion with native and with transected medial patellofemoral ligaments used to simulate patellar instability...
June 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28626099/-a-cross-sectional-study-on-the-correlation-between-mri-signal-for-ipfp-and-knee-osteoarthritis
#10
Song Wu, Hongliang Ba, Jinshen He, Yunjie Liao
To investigate the correlation between MRI signal for infrapatellar fat pad (IPFP) and pathological changes in knee osteoarthritis (KOA), and to analyze the role of IPFP in the development of knee osteoarthritis.
 Methods: A total of 114 subjects (without special knee disease) were enrolled for this study. The intensity of MRI signal for IPFP was determined by fat-suppressed proton-density-weighted turbospin-echo magnetic resonance imaging. Based on the cartilage defects and osteophytes of knee joint, the subjects were divided into a KOA group and a control group...
May 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28624854/superior-return-to-sports-rate-after-patellar-tendon-autograft-over-patellar-tendon-allograft-in-revision-anterior-cruciate-ligament-reconstruction
#11
Michèle N J Keizer, Roy A G Hoogeslag, Jos J A M van Raay, Egbert Otten, Reinoud W Brouwer
PURPOSE: After revision anterior cruciate ligament reconstruction (ACLR), the rate of return to the pre-injury type of sport (RTS type) is low and graft choice might be an important factor. The aim of this study was to determine whether there is a difference in outcome after revision ACLR using a patellar tendon allograft compared to an ipsilateral patellar tendon autograft. It was hypothesized that the rate of RTS type using an ipsilateral patellar tendon autograft will be superior to using patellar tendon allograft...
June 17, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28624557/arthroscopic-lateral-retinacular-release-medial-retinacular-plication-and-partial-medial-tibial-tubercle-transfer-for-recurrent-patellar-dislocation
#12
Song Chen, Yiqin Zhou, Qirong Qian, Yuli Wu, Peiliang Fu, Haishan Wu
OBJECTIVE: To assess the efficacy of a therapeutic protocol composed of arthroscopic lateral retinacular release, medial retinacular plication, and partial medial tibial tuberosity transfer for patients with recurrent patellar dislocation. METHOD: 71 patients, 11 males and 60 females and a total of 77 knees, with recurrent dislocation of the patella were enrolled between 1998 - 2012. The average age of the patients was 19.5 years and 67 of them had previous knee trauma history...
June 14, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28624016/longitudinal-change-in-patellofemoral-cartilage-thickness-cartilage-t2-relaxation-times-and-subchondral-bone-plate-area-in-adolescent-vs-mature-athletes
#13
Adam G Culvenor, Wolfgang Wirth, Susanne Maschek, Heide Boeth, Gerd Diederichs, Georg Duda, Felix Eckstein
OBJECTIVE: Patellofemoral cartilage changes have been evaluated in knee trauma and osteoarthritis; however, little is known about changes in patellar and trochlear cartilage thickness, T2 relaxation-time and subchondral bone plate area (tAB) during growth. Our prospective study aimed to explore longitudinal change in patellofemoral cartilage thickness, T2 and tAB in adolescent athletes, and to compare these data with those of mature (i.e., adult) athletes. MATERIALS AND METHODS: 20 adolescent (age 16±1years) and 20 mature (46±5years) volleyball players were studied over 2-years (10 men and 10 women each group)...
July 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28623415/a-stand-alone-lateral-condyle-elevating-trochlear-osteotomy-leads-to-high-residual-instability-but-no-excessive-increase-in-patellofemoral-osteoarthritis-at-12-year-follow-up
#14
S Tigchelaar, J van Sambeeck, S Koeter, A van Kampen
PURPOSE AND HYPOTHESIS: Trochlear osteotomy is a rarely performed procedure, only indicated in selected cases. Due to its nature, it can potentially lead to cartilage damage and subsequent early osteoarthritis. Satisfactory short-term results from lateral condyle-elevating osteotomy have previously been reported. The long-term effects of this procedure on clinical outcomes, patellar stability and radiological osteoarthritis are reported here. METHODS: Sixteen patients (19 knees) with patellar instability due to trochlear dysplasia were included...
June 16, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28618872/outcomes-of-patellofemoral-osteochondral-lesions-treated-with-structural-grafts-in-patients-older-than-40-years
#15
Ryan M Degen, Nathan W Coleman, Danielle Tetreault, Brenda Chang, Greg T Mahony, Christopher L Camp, Shawn G Anthony, Riley J Williams
Background Chondral lesions in the patellofemoral compartment represent a difficult entity to treat among active patients, with no clear consensus on the optimal treatment strategy. The purpose of this study was to review the functional outcomes of patients >40 years old with primary patellofemoral osteochondral lesions who underwent a cartilage restoration procedure with a structural graft. Methods Following institutional review board approval, 35 patients >40 years treated for patellofemoral chondral or osteochondral injuries were retrospectively identified...
July 2017: Cartilage
https://www.readbyqxmd.com/read/28617199/an-optimal-ultrasonographic-diagnostic-test-for-early-gout-a-prospective-controlled-study
#16
Eleonora Norkuviene, Mykolas Petraitis, Indre Apanaviciene, Dalia Virviciute, Asta Baranauskaite
Objective To identify the optimal sites for classification of early gout by ultrasonography. Methods Sixty patients with monosodium urate crystal-proven gout (25 with early gout [≤2-year symptom duration], 35 with late gout [>2-year symptom duration], and 36 normouricemic healthy controls) from one centre were prospectively evaluated. Standardized blinded ultrasound examination of 36 joints and the triceps and patellar tendons was performed to identify tophi and the double contour (DC) sign. Results Ultrasonographic sensitivity was lower in early than late gout...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28616652/effects-of-initial-graft-tension-on-femoral-tunnel-widening-after-anatomic-anterior-cruciate-ligament-reconstruction-using-a-bone-patellar-tendon-bone-graft
#17
Shuji Taketomi, Hiroshi Inui, Keitaro Tahara, Nobuyuki Shirakawa, Sakae Tanaka, Takumi Nakagawa
INTRODUCTION: The effects of initial graft tension upon tunnel widening (TW) following anatomic anterior cruciate ligament (ACL) reconstruction have not been elucidated. The purpose of this study was to retrospectively investigate the effect of two different graft-tensioning protocols upon femoral TW following anatomic ACL reconstruction using a bone-patellar tendon-bone (BPTB) graft and a three-dimensional (3D) computed tomography (CT) model. METHODS: Forty-three patients who underwent isolated ACL reconstruction using BPTB grafts were included in this study...
June 14, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28615820/from-wheelchair-to-walking-first-case-report-of-post-electrical-burn-destruction-of-patellar-ligament-with-its-one-stage-reconstruction-and-restoration-of-function
#18
Sandip Kanti Basu, Jayanta Bain, Bijay Kumar Majumdar, Debarati Chattopadhyay, Debasis Baitalik, Yatindra Kumar Dewangan, Debtanu Bhattacharya, Pritha Rakshit, Vivek Gupta, Ashwani Kumar, Rathindra Nath Haldar
Electrical burn injury causing bilateral patellar ligament destruction leading to complete loss of knee extension is a very rare injury. In such situation, surgical repair or reconstruction of the patellar ligament becomes necessary to restore knee functions. Here, we present such a case of an 8-year-old boy, whose both patellar ligaments were destroyed throughout its length due to high-voltage electrical injury. His left knee joint cavity was exposed and grossly infected, but the right knee joint cavity was apparently intact...
January 2017: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/28614288/evaluation-of-the-tibial-tubercle-to-posterior-cruciate-ligament-distance-in-a-pediatric-patient-population
#19
Blake Clifton, Dustin L Richter, Dan Tandberg, Matthew Ferguson, Gehron Treme
BACKGROUND: Evaluation of distal extensor mechanism alignment continues to evolve in children with patella instability. Prior studies support the use of the tibial tubercle to trochlear groove (TT-TG) distance but limitations exist for this measurement including: changes in the TT-TG distance with knee flexion, difficulty with finding the deepest part of a dysplastic trochlea, and limitations regarding identification of the site of the anatomic abnormality. The tibial tubercle-posterior cruciate ligament (TT-PCL) distance has been introduced as an alternative measure to address the shortcomings in the TT-TG distance by quantifying the position of the TT independent of the trochlea and with respect to the tibia only...
June 13, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28614283/recurrent-patellar-instability-implications-of-preoperative-patellar-crepitation-on-the-status-of-the-patellofemoral-articular-cartilage
#20
Scott J Luhmann, June C Smith, Mario Schootman, Nandan Prasad
BACKGROUND: The purpose of the study was to quantify the frequency, severity, and location of patellofemoral (PF) articular cartilage changes recurrent patellar instability treated surgically in patients with preoperative clinical patellar crepitation. METHODS: A single-surgeon database was queried for all knees with recurrent patellar instability between 3/2000 and 6/2012 (n=214). Only knees which underwent knee arthroscopy during the surgical treatment were included (n=148)...
June 13, 2017: Journal of Pediatric Orthopedics
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