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Journal of Experimental Orthopaedics

W A M van Lieshout, C D Martijn, B T J van Ginneken, R J van Heerwaarden
INTRODUCTION: Medial closing wedge high tibial osteotomy (CWHTO) for valgus deformity correction was first described by Coventry whom performed an additional reefing of the medial collateral ligament (MCL) to prevent instability postoperative. In our clinic the additional reefing procedure has never been performed and instability has not been reported routinely by patients. Using instrumented laxity testing, pre- and postoperative valgus and varus knee laxity can be measured objectively...
December 10, 2018: Journal of Experimental Orthopaedics
I Geethan, K Santhosh Sahanand, P R Ashwin Vijay, David V Rajan
BACKGROUND: Tripling semitendinosus tendon for ACL graft preparation facilitates creation of longer and thicker grafts. Our objective was to evaluate the mechanical difference between tripled tendon grafts, prepared by three methods, by comparing with quadrupled tendon graft. METHODS: Bovine hind-foot hoof extensors were allocated to four groups. Group I had quadrupled graft construct. Tripled graft constructs were prepared by passing the tendon to the Endobutton CL loop and stitching the third strand to (i) the loop (in Group II) or (ii) to one strand(in Group III) or (iii)to loop and both tendon strands (in Group IV)...
November 27, 2018: Journal of Experimental Orthopaedics
B Dallaudiere, A Crombé, A P Gadeau, L Pesquer, A Peuchant, C James, A Silvestre
BACKGROUND: Iodine contrast agents (ICAs) are routinely used by radiologists to help guide intra-articular infiltrations. The aim of this study was to assess the in vitro effects of ICA on platelet function of human autologous Platelet-Rich Plasma (PRP). METHODS: One hundred thirty-seven consecutive patients with symptomatic femoral-patellar osteoarthritis were included. All were addressed to our institution for a fluoroscopy-guided intra-articular PRP infiltration of the pathological femoral-patellar joint...
October 29, 2018: Journal of Experimental Orthopaedics
Graeme Ethan Hancock, Tracey Hepworth, Kevin Wembridge
BACKGROUND: Measuring knee range of motion is important in examination and as a post-operative outcome. It is therefore important that measurements are accurate. Knee angles can be measured by traditional goniometers, smartphone apps are readily available and there are also purpose made digital devices. Establishing the minimum difference between methods is essential to monitor change. The purpose of this study was to assess reliability and minimum significant difference of visual estimation, short and long arm goniometers, a smartphone application and a digital inclinometer...
October 19, 2018: Journal of Experimental Orthopaedics
Nick F J Hilgersom, Tim Horeman-Franse, Ronald L A W Bleys, Denise Eygendaal, Michel P J van den Bekerom, Gabriëlle J M Tuijthof
BACKGROUND: Elbow arthroscopy is a difficult surgical technique. Objective metrics can be used to improve safe and effective training in elbow arthroscopy. Force exerted on the elbow tissue during arthroscopy can be a measure of safe tissue manipulation. The purpose of this study was to determine the force magnitude and force direction used by experts during arthroscopic elbow navigation in cadaveric specimens and assess their applicability in elbow arthroscopy training. METHODS: Two cadaveric elbows were mounted on a Force Measurement Table (FMT) that allowed 3-dimensional measurements (x-, y-, and z-plane) of the forces exerted on the elbow...
October 11, 2018: Journal of Experimental Orthopaedics
Thomas Bandholm, Thomas W Wainwright, Henrik Kehlet
Exercise-based interventions applied before and after total hip and knee arthroplasty (THA and TKA, respectively) have been investigated for a number of years, based on the assumption that they will enhance post-operative recovery. Although recent studies suggest that high-volume, pre-operative exercise may enhance post-operative recovery after TKA, studies of post-operative exercise-based interventions, have not found superiority of one exercise regime over another. It seems, however, that post-operative, exercise-based, rehabilitation is superior to no or minimal rehabilitation after THA and TKA...
October 11, 2018: Journal of Experimental Orthopaedics
Robin Mawson, Michael J Creech, Devin C Peterson, Forough Farrokhyar, Olufemi R Ayeni
BACKGROUND: Participation in youth soccer carries a significant risk of injury, most commonly non-contact injuries of the lower extremity. A growing body of research supports the use of neuromuscular interventions by teams to prevent such injuries, yet the uptake of these recommendations by soccer teams remains largely unexplored. The purposes of the study were to determine (1) the level of awareness by youth coaches of injury prevention programs and their efficacy; (2) the number of youth coaches that use these interventions; and (3) barriers and potential facilitators to implementing a sustainable injury prevention program...
October 11, 2018: Journal of Experimental Orthopaedics
Colter R Wichern, Kathryn C Skoglund, Joseph G O'Sullivan, Anora K Burwell, Joseph T Nguyen, Andrea Herzka, Jacqueline M Brady
BACKGROUND: The all-inside cruciate ligament graft preparation technique has become popular due to its utility in sparing a growing physis, preserving a tendon in ACL surgery, and/or reduction of pain. However, few studies have compared graft preparation techniques to determine the ideal construct for cruciate ligament reconstruction. We sought to compare biomechanical properties of two quadrupled all-inside cruciate ligament graft preparation techniques and three alternative all-inside graft preparation techniques that may be used when the available tendon is too short to be quadrupled...
October 10, 2018: Journal of Experimental Orthopaedics
M Ettinger, R Karkosch, H Horstmann, P Savov, T Calliess, T Smith, M Petri
BACKGROUND: Reliable biomechanical data about the strength of different tibial extracortical graft fixation devices is sparse. This biomechanical study compares the properties of tibial graft fixation in ACL reconstruction with either the ACL Tight Rope™ or the Rigid Loop Adjustable™ device. The hypothesis was that both fixation devices would provide comparable results concerning gap formation during cyclic loading and ultimate failure load. METHODS: Sixteen sawbone tibiae (Sawbones™) underwent extracortical fixation of porcine flexor digitorum profundus grafts for ACL reconstruction...
September 29, 2018: Journal of Experimental Orthopaedics
Annika Piirainen, Jukka Huopio, Hannu Kokki, Anu Holopainen, Teemu Pajunen, Kari Pulkki, Merja Kokki
BACKGROUND: The feasibility of novel kidney injury biomarkers in consecutive patients having total knee arthroplasty with local infiltration analgesia was evaluated. METHODS: We enrolled 30 patients scheduled for elective unilateral total knee arthroplasty. Paired plasma and urine samples were taken before surgery and at 4 h, 24 h and 48 h after surgery to measure creatinine, cystatin C, neutrophil gelatinase associated lipocalin, kidney injury molecule-1, interleukin-18 and liver-type fatty acid-binding protein...
September 25, 2018: Journal of Experimental Orthopaedics
Salvatore Bisicchia, Flavia Botti, Cosimo Tudisco
BACKGROUND: Discoid lateral meniscus is the most frequent variant of the meniscus. Although the histology of normal menisci in children and in adults has been well described, few studies have focused on the histology of discoid menisci. Furthermore, most of the patients in those studies were adults. The aim of the present study was to report the histological findings of discoid lateral meniscus in a group of children and adolescents, aged between 9 and 18, after arthroscopic partial resection, focusing on cellularity, arrangement of collagen fibers, and vascularity of the excised fragments...
September 24, 2018: Journal of Experimental Orthopaedics
F Abat, H Alfredson, M Cucchiarini, H Madry, A Marmotti, C Mouton, J M Oliveira, H Pereira, G M Peretti, C Spang, J Stephen, C J A van Bergen, L de Girolamo
The treatment of painful chronic tendinopathy is challenging. Multiple non-invasive and tendon-invasive methods are used. When traditional non-invasive treatments fail, the injections of platelet-rich plasma autologous blood or cortisone have become increasingly favored. However, there is little scientific evidence from human studies supporting injection treatment. As the last resort, intra- or peritendinous open or endoscopic surgery are employed even though these also show varying results. This ESSKA basic science committee current concepts review follows the first part on the biology, biomechanics and anatomy of tendinopathies, to provide a comprehensive overview of the latest treatment options for tendinopathy as reported in the literature...
September 24, 2018: Journal of Experimental Orthopaedics
Yoshinori Ohashi, Junsuke Nakase, Kengo Shimozaki, Kojun Torigoe, Hiroyuki Tsuchiya
BACKGROUND: Using the film model method, the process whereby a substance called tendon gel is secreted from transected tendon ends and changed into a tendon after application of a traction force is known. The objective of this study was to investigate the association between mechanical properties in the early stages of tendon regeneration and time by using the film model method. METHOD: Adult male ddY mice, closed colony mice established and maintained in Japan, were prepared for each experimental group...
September 21, 2018: Journal of Experimental Orthopaedics
Stephanie N Moore-Lotridge, William K Oelsner, Yael Ihejirika, Mihir J Desai, Sandra S Gebhart, Jonathan G Schoenecker
BACKGROUND: Peri-articular injury may result in functional deficits and pain. In particular, post-traumatic elbow stiffness is a debilitating condition, precluding patients from performing activities of daily living. As such, clinicians and basic scientists alike, aim to develop novel therapeutic interventions to prevent and treat elbow stiffness; thereby reducing patient morbidity. Yet, there is a paucity of pre-clinical models of peri-articular stiffness, especially of the upper extremity, necessary to develop and test the efficacy of therapeutics...
September 18, 2018: Journal of Experimental Orthopaedics
Johannes Barth, Jérôme Garret, Achilleas Boutsiadis, Etienne Sautier, Laurent Geais, Hugo Bothorel, Arnaud Godenèche
BACKGROUND: While most anatomic TSA stems allow some intra-operative adjustments, the default configuration assumes that head offset is directly proportional to stem diameter. Some authors reported that humeral head diameter is proportional to intra-medullary canal width and humeral head offset, but none investigated the direct relationship between head offset and endosteal measurements. The purpose of the study was to determine whether global humeral head offset is proportional to intramedullary canal width at the distal metaphysis and proximal diaphysis...
September 12, 2018: Journal of Experimental Orthopaedics
Joanna Stephen, Avinash Alva, Punyawan Lumpaopong, Andy Williams, Andrew A Amis
BACKGROUND: Vastus Medialis Muscles (VMM) damage has been widely identified following patellar dislocation. Rehabilitation programmes have been suggested to strengthen the VMM and reduce clinical symptoms of pain and instability. This controlled laboratory study investigated the hypothesis that reduced Vastus Medialis Obliquus (VMO) and Vastus Medialis Longus (VML) muscle tension would alter patellar tracking, stability and PFJ contact pressures. METHODS: Nine fresh-frozen dissected cadaveric knees were mounted in a rig with the quadriceps and iliotibial band loaded to 205 N...
September 10, 2018: Journal of Experimental Orthopaedics
Pierre-Louis Ricci, Stefan Maas, Jens Kelm, Torsten Gerich
BACKGROUND: The objective of the study is to investigate the load transmission within the pelvic ring under physiological loading during gait and to correlate these results with clinical findings. In a second approach, we analysed how load distribution is altered by fractures of the anterior pelvic ring. METHODS: Muscle forces and joint reaction forces are calculated by inverse dynamics and implemented in a finite element pelvis model including the joints. RESULTS: With the intact configuration and according to the moment of the gait, left and right superior and inferior rami show the highest stresses of the model, corresponding to the typical location of an anterior pelvic ring fracture...
September 3, 2018: Journal of Experimental Orthopaedics
Ryota Katsumi, Tomoharu Mochizuki, Takashi Sato, Koichi Kobayashi, Satoshi Watanabe, Osamu Tanifuji, Naoto Endo
BACKGROUND: Humans support their bodies exclusively by vertical balance in bipedal locomotion, and the body, especially the lower extremity, generally changes with age. Sex and body constitution are assumed to be associated with lower extremity alignment, but this association remains to be elucidated. This study sought to clarify this association in healthy, elderly, non-obese humans in a Japanese population. METHODS: The present study investigated 55 healthy volunteers (mean age: 70 ± 6 years)...
August 22, 2018: Journal of Experimental Orthopaedics
Juha-Sampo Suomalainen, Gideon Regalado, Antti Joukainen, Tommi Kääriäinen, Mervi Könönen, Hannu Manninen, Petri Sipola, Hannu Kokki
BACKGROUND: Measurement of the tibial tubercle-trochlear groove (TT-TG) distance is used to assess patellofemoral instability and rotation. Since patellofemoral instability and acute patellar dislocation are common among adolescents, it is important to clarify the relationship between TT-TG distance and various flexion and extension angles in asymptomatic children. The purpose of the present study was to determine how knee flexion and extension influence TT-TG-distance values measured using 3D imaging in an anatomic axial plane among asymptomatic adolescents...
August 16, 2018: Journal of Experimental Orthopaedics
David R Lionberger, Justin Samorajski, Charlie D Wilson, Andreana Rivera
BACKGROUND: Clinicians are often faced with the decision whether to revise a painful total knee replacement in patients who have chronic vague pain with no apparent explanation. A sensitive metal testing assay called the lymphocyte stimulation test has been used to detect nickel sensitization in patients with orthopedic implants. We hypothesize that nickel sensitization plays a role in the pathology of failed joint arthroplasty in patients with unexplained dissatisfaction. METHODS: 32 patients with symptomatic total knee arthroplasty without obvious mechanical findings were tested prior to revision surgery...
August 14, 2018: Journal of Experimental Orthopaedics
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