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Patella tendon

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https://www.readbyqxmd.com/read/29130878/a-novel-technique-utilizing-a-vastus-lateralis-anchor-in-treatment-of-chronic-patellar-dislocation-after-total-knee-arthroplasty
#1
Allison Mayfield, Vamsi Singaraju, Afshin A Anoushiravani, Zain Sayeed, Jamal K Saleh, Khaled J Saleh
Extensor mechanism complications involving the patella frequently result in total knee arthroplasty (TKA) failure. Postoperative patellar dislocation may be caused by soft tissue imbalance, improper sizing, and position of the prosthesis. This report describes a case of revision TKA requiring several rounds of soft tissue releases in an effort to treat the patient's chronic patellar dislocation. In the process, a novel surgical approach was developed for the surgical management of refractory chronic patellar dislocations...
October 2017: Journal of Surgical Orthopaedic Advances
https://www.readbyqxmd.com/read/29128877/the-location-of-the-medial-parapatellar-arthrotomy-influences-intraoperative-patella-tracking
#2
Scott R Nodzo, Maximilian Kasparek, Kilian Rueckl, Friedrich Boettner
PURPOSE: The medial parapatellar arthrotomy (MPPA) is a commonly utilized surgical approach; however, the placement of the arthrotomy and its influence on intraoperative patellar tracking has not been evaluated. METHODS: Six knees from three fresh frozen cadavers with transthoracic amputations were operated on. All underwent standard posterior stabilized total knee arthroplasty using a medial parapatellar approach placed at the border of the vastus medialis oblique (VMO)-quadriceps junction...
November 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29100765/effect-of-transosseous-tunnels-on-patella-fracture-risk-after-medial-patellofemoral-ligament-reconstruction-a-cadaveric-study
#3
Nicholas A Bonazza, Gregory S Lewis, Eric Z Lukosius, Evan P Roush, Kevin P Black, Aman Dhawan
PURPOSE: To determine whether (1) tunnels that breach the anterior cortex of the patella result in increased fracture risk and (2) transosseous tunnels drilled across the patella significantly reduce the tensile force needed to fracture the patella. METHODS: Twenty-six fresh-frozen cadaveric human patellas were randomized to 1 of 3 groups: a control group with unmodified patellas, a group with 2 transverse tunnels (TT) that did not breach the anterior cortex, and a group with 2 TT that breached the anterior cortex of the patella (PA)...
October 31, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29082055/quadriceps-tendon-rupture-in-an-adolescent-athlete
#4
William A Zuke, Beatrice Go, Alexander E Weber, Brian Forsythe
Quadriceps tendon rupture is an uncommon injury that usually occurs in middle-aged and elderly men with a history of chronic illnesses. We report the case of a 17-year-old healthy adolescent male baseball player who sustained this injury as a result of sudden deceleration in his left knee. He initially reported to the emergency department and then presented to our practice, where he was diagnosed with a quadriceps tendon tear. Preoperatively, he was unable to perform a single straight-leg raise. During surgical repair, the free edge of the quadriceps tendon was mobilized and anchored into the superior pole of the patella, followed by sutures to ensure reinforcement of the quadriceps footprint...
2017: Case Reports in Orthopedics
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
#5
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/29044664/a-new-technique-of-surgical-planning-for-anterior-cruciate-ligament-reconstruction-feasibility-assessment-of-shear-wave-elastography-to-tendon-of-semitendinosus-muscle
#6
Yoshiaki Itoigawa, Yuji Takazawa, Yuichiro Maruyama, Keiichi Yoshida, Tatsuo Sakai, Koichiro Ichimura, Kazuo Kaneko
There is currently no method to quantify the quality of the harvested graft before anterior cruciate ligament (ACL) reconstruction. The purpose of the present study was to explore a method for measuring stiffness of the normal tendon of the semitendinosus muscle using shear wave elastography (SWE). Our investigation comprised two steps. First, we determined orientation of the semitendinosus tendon fibers in 20 lower legs of embalmed cadavers. Second, we investigated the feasibility of quantifying stiffness of the normal semitendinosus tendon by SWE in 24 subjects (48 legs: 24 male and 24 female subjects) in vivo...
October 17, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/29016398/low-intensity-pulsed-ultrasound-stimulation-for-tendon-bone-healing-a-dose-dependent-study
#7
Hongbin Lu, Fei Liu, Can Chen, Zhanwen Wang, Huabin Chen, Jin Qu, Tao Zhang, Daqi Xu, Jianzhong Hu
OBJECTIVES: This study aimed to evaluate the dosage effect of low-intensity pulsed ultrasound stimulation (LIPUS) on tendon-bone (T-B) healing. DESIGN: Standard partial patellectomies were performed on 120 mature New Zealand rabbits randomly assigned into three groups: a control group (daily mock sonication, 20 min), a qd group (daily ultra-sonication, 20 min), and a bid group (ultra-sonication twice a day, 20 min each time). The rabbits were sacrificed 8 or 16 weeks postoperatively, and the microarchitectural, histological, and mechanical properties of the patella-patellar tendon (PPT) interface were evaluated...
October 7, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/29016187/quantitative-and-qualitative-analysis-of-the-medial-patellar-ligaments-an-anatomic-and-radiographic-study
#8
Bradley M Kruckeberg, Jorge Chahla, Gilbert Moatshe, Mark E Cinque, Kyle J Muckenhirn, Jonathan A Godin, Taylor J Ridley, Alex W Brady, Elizabeth A Arendt, Robert F LaPrade
BACKGROUND: The qualitative and quantitative anatomy of the medial patellar stabilizers has been reported; however, a quantitative analysis of the anatomic and radiographic attachments of all 4 ligaments relative to anatomic and osseous landmarks, as well as to one another, has yet to be performed. PURPOSE: To perform a qualitative and quantitative anatomic and radiographic evaluation of the medial patellofemoral ligament (MPFL), medial patellotibial ligament (MPTL), medial patellomeniscal ligament (MPML), and medial quadriceps tendon femoral ligament (MQTFL) attachment sites, with attention to their relationship to pertinent osseous and soft tissue landmarks...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28990676/arthroscopic-approach-and-anatomy-of-the-stifle-joint-in-the-rabbit
#9
Sarah Torrey Peters, Markus Wilke, Tanja Schmid
OBJECTIVE: To describe a technique and normal findings for arthroscopy of the stifle in rabbits. STUDY DESIGN: Cadaver study. ANIMALS: Twenty cadaveric stifles from New Zealand White rabbits were examined. METHODS: The arthroscope was placed through a medial portal, and instrument portals were created on the lateral aspect of the joint. The same portals were used for examination of the entire joint and palpation of structures with a probe...
October 9, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28979605/medial-patellofemoral-ligament-reconstruction-using-the-hamstring-tendon-for-patellofemoral-joint-instability-in-an-81-year-old-female
#10
Tsuneari Takahashi, Katsushi Takeshita
INTRODUCTION: Chronic patellofemoral instability occurs mainly in adolescent females and can also be induced by medial patellofemoral ligament (MPFL) injury. There are no case reports of MPFL reconstruction for chronic patellofemoral instability due to MPFL injury in aged populations. CASE PRESENTATION: 81-year-old female presented with left knee pain, giving way, and patellar instability while climbing stairs, which continued for 18 months. Patellar apprehension test was positive, and roentgenogram showed lateral patellar subluxation...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28975655/absence-of-bony-patella-in-the-white-eared-opossum-didelphis-albiventris-morphology-and-diagnostic-imaging
#11
L R Inamassu, M J Mamprim, C R Dadalto, F C Cavaletti, M C Mello, B C Schimming
Patella, the kneecap, is the best known and largest of the sesamoid bones and is present in the quadriceps femoris tendon. Typical patella appears in all extant mammals, with the exception of some marsupials and bats. No description about the white-eared opossum stifle was found in the available literature up to now. Thus, the knee joints of 16 Didelphis albiventris were examined by gross anatomy, histology, radiography and computed tomography images to determine the presence or absence of ossified patella in this animal...
October 4, 2017: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/28974931/muscle-tendon-unit-properties-during-eccentric-exercise-correlate-with-the-creatine-kinase-response
#12
Kirsty M Hicks, Gladys L Onambele-Pearson, Keith Winwood, Christopher I Morse
Aim: The aim of this paper was to determine whether; (1) patella tendon stiffness, (2) the magnitude of vastus lateralis fascicle lengthening, and (3) eccentric torque correlate with markers of exercise induced muscle damage. Method: Combining dynamometry and ultrasonography, patella tendon properties and vastus lateralis architectural properties were measured pre and during the first of six sets of 12 maximal voluntary eccentric knee extensions. Maximal isometric torque loss and creatine kinase activity were measured pre-damage (-48 h), 48, 96, and 168 h post-damage as markers of exercise-induced muscle damage...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28961550/evidence-of-knee-extensor-dysfunction-during-sit-to-stand-following-distal-femoral-extension-osteotomy-and-patellar-tendon-advancement-in-young-adults-with-cerebral-palsy-a-pilot-study
#13
Elizabeth R Boyer, Jean L Stout, Jennifer C Laine, Sarah M Gutknecht, Lucas Henrique Oliveira, Meghan E Munger, Michael H Schwartz, Tom F Novacheck
A distal femoral extension osteotomy with patellar tendon advancement (DFEO+PTA) is a common treatment for individuals with cerebral palsy (CP) who walk in crouch. Musculoskeletal modeling suggests that the typical patella baja position post-DFEO+PTA may limit one's abilities to perform sit-to-stand (STS) tasks; however, STS function has not been assessed. Our purpose was to compare how well individuals who received a DFEO+PTA can perform a 5-times STS test (FTSST) eight or more years after surgery compared to their peers who did not receive a DFEO+PTA (non-DFEO+PTA group)...
September 19, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28913879/short-t2-imaging-using-a-3d-double-adiabatic-inversion-recovery-prepared-ultrashort-echo-time-cones-3d-dir-ute-cones-sequence
#14
Ya-Jun Ma, Yanchun Zhu, Xing Lu, Michael Carl, Eric Y Chang, Jiang Du
PURPOSE: To investigate high contrast imaging of short T2 tissues with a three-dimensional double adiabatic inversion recovery prepared ultrashort echo time Cones (3D DIR-UTE-Cones) sequence. METHODS: The sequence used two sequential adiabatic inversion pulses to suppress signals from long T2 tissues, followed by multispoke UTE acquisition to detect signals from short T2 tissues. The two adiabatic inversion pulses are identical with a center frequency located at the water peak, but the spectral width is broad enough to cover both water and fat frequencies...
September 14, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28888715/acute-traumatic-rupture-of-the-patellar-tendon-in-pediatric-population-case-series-and-review-of-the-literature
#15
Mohamed Abdelhamid Ali Yousef, Scott Rosenfeld
BACKGROUND: Intact knee extensor mechanism is required for the normal function of the lower extremity. Patellar tendon rupture is a relatively rare injury with peak age incidence around 40 years and usually occurs midsubstance. The occurrence of pure patellar tendon rupture without bony avulsion is an extremely rare injury in the pediatric population with few cases reported in the literature with limited information regarding frequency, complications, and outcomes in children. However, due to increased participation in sports and high-energy recreational activities during childhood, the frequency of such injuries has progressively increased...
November 2017: Injury
https://www.readbyqxmd.com/read/28869901/transtibial-prosthetic-socket-shape-in-a-developing-country-a-study-to-compare-initial-outcomes-in-pressure-cast-hydrostatic-and-patella-tendon-bearing-designs
#16
Sheridan Laing, Noel Lythgo, Jim Lavranos, Peter Vee Sin Lee
This study compared the physical function and comfort level of patients with unilateral transtibial amputation after being fitted with a hand-cast Patella Tendon Bearing (PTB) socket and a pressure-cast (PCAST) hydrocast socket. The latter technique aims to reduce the skill dependency currently required for socket manufacture and fit. The study was conducted at the Vietnamese Training Centre for Orthopaedic Technologies and involved seventeen Vietnamese participants with unilateral transtibial amputation, all of whom were long term users of prosthetics...
October 2017: Gait & Posture
https://www.readbyqxmd.com/read/28867290/modified-adductor-sling-technique-a-surgical-therapy-for-patellar-instability-in-skeletally-immature-patients
#17
Lena Alm, Matthias Krause, Carolin Mull, Karl-Heinz Frosch, Ralph Akoto
BACKGROUND: Due to open femoral physis the therapy of patellar instability in skeletally immature patients is challenging. We developed a modified surgical technique of the 'Adductor-Sling-Approach' by Sillanpää. The purpose of this study was to evaluate the clinical outcome of the operative technique and to analyse the reasons for failure. METHODS: Thirty 'modified adductor sling' reconstructions in 28 patients were included in the study. From 2010 to 2016 modified adductor sling reconstruction was performed by looping the gracilis or semitendinosus tendon around the adductor magnus tendon and attaching it at the medial facet of the patella...
August 31, 2017: Knee
https://www.readbyqxmd.com/read/28854761/platelet-rich-plasma-injections-as-a-treatment-for-refractory-patellar-tendinosis-a-meta-analysis-of-randomised-trials
#18
REVIEW
Leanne Dupley, Charalambos P Charalambous
Purpose: Patellar tendinosis (PT) is a common condition amongst athletes. In this study, we perform a meta-analysis on randomised controlled trials (RCTs) to evaluate the use of platelet-rich plasma (PRP) for refractory PT. Methods: A literature search was undertaken in various databases from their year of inception to October 2015. The primary outcome measure was the Victorian Institute of Sports Assessment-Patella (VISA-P) score. Results: We identified 2 RCTs comparing PRP injections to alternative treatment options (extracorporeal shockwave therapy [ESWT] and dry needling of the tendon)...
September 1, 2017: Knee Surgery & related Research
https://www.readbyqxmd.com/read/28817160/extensor-mechanism-reconstruction-for-chronic-patellar-fracture
#19
Antonio Cusano, Emily J Curry, Lee N Marinko, Xinning Li
Patients with displaced patellar fractures typically present with disruption to the extensor mechanism requiring acute surgical intervention. Chronic patellar fractures with disruption of the extensor mechanism are uncommon, and few surgical options are available. The authors present a patient who sustained a fracture to the inferior pole of the patella in Africa 5 years prior that was managed conservatively with bands and a brace. He decided to pursue surgical intervention because of difficulties with leg extension, weakness, and ambulation...
August 17, 2017: Orthopedics
https://www.readbyqxmd.com/read/28796028/sleeve-fracture-of-the-adult-patella-case-report-and-review-of-the-literature
#20
Linjun Xie, Hong Xu, Lizhi Zhang, Rong Xu, Yingkun Guo
RATIONALE: The patellar fractures are common in adults, but rare in children. As a particular type of patellar fracture, however, sleeve fractures are almost always limited to children in the under 16's group. PATIENT CONCERNS: Herein, we report a rare case of a 19-year-old healthy adult female who presented sleeve fracture at the superior pole of the left patella. The clinical and radiological features are found including joint effusion, anterior tilt of the patella and a shell of bone lying proximally to the patella...
August 2017: Medicine (Baltimore)
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